Freestyle: new stroke modifiers

This patch introduces a couple new stroke modifiers. The ones currently implemented are based on prototypes by @kjym3 and myself.

The new modifiers:
  - Tangent
  - Thickness noise
  - Crease Angle
  - Simplification
  - Curvature 3D

The documentation for these new modifier types can be found [[ http://www.blender.org/manual/render/freestyle/parameter_editor/index.html | in the manual ]]:

{F134441}
(left: AnisotropicThicknessShader, right: NoiseThicknessShader)

{F140499}
(left: Curvature 3D, right: Simplification)

Author: Folkert de Vries (flokkievids)

Reviewers: kjym3

Subscribers: #user_interface, plasmasolutions, kjym3

Projects: #bf_blender

Differential Revision: https://developer.blender.org/D963

release/scripts/freestyle/modules/freestyle/utils.py

@@ -39,9 +39,11 @@ __all__ = (
     "iter_material_value",
     "iter_t2d_along_stroke",
     "material_from_fedge",
+    "normal_at_I0D",
     "pairwise",
     "phase_to_direction",
     "rgb_to_bw",
+    "simplify",
     "stroke_curvature",
     "stroke_normal",
     "StrokeCollector",
@@ -66,8 +68,22 @@ from freestyle.types import (
 
 from mathutils import Vector
 from functools import lru_cache, namedtuple
-from math import cos, sin, pi
+from math import cos, sin, pi, atan2
-from itertools import tee
+from itertools import tee, compress
+
+# -- types -- #
+
+# A named tuple primitive used for storing data that has an upper and
+# lower bound (e.g., thickness, range and certain other values)
+class BoundedProperty(namedtuple("BoundedProperty", ["min", "max", "delta"])):
+    def __new__(cls, minimum, maximum, delta=None):
+        if delta is None:
+            delta = abs(maximum - minimum)
+        return super().__new__(cls, minimum, maximum, delta)
+
+    def interpolate(self, val):
+        result = (self.max - val) / self.delta
+        return 1.0 - bound(0, result, 1)
 
 
 # -- real utility functions  -- #
@@ -76,7 +92,6 @@ def rgb_to_bw(r, g, b):
     """Method to convert rgb to a bw intensity value."""
     return 0.35 * r + 0.45 * g + 0.2 * b
 
-
 def bound(lower, x, higher):
     """Returns x bounded by a maximum and minimum value. Equivalent to:
     return min(max(x, lower), higher)
@@ -84,7 +99,6 @@ def bound(lower, x, higher):
     # this is about 50% quicker than min(max(x, lower), higher)
     return (lower if x <= lower else higher if x >= higher else x)
 
-
 def get_strokes():
     """Get all strokes that are currently available"""
     return tuple(map(Operators().get_stroke_from_index, range(Operators().get_strokes_size())))
@@ -118,8 +132,60 @@ def material_from_fedge(fe):
         material = right if (right.priority > left.priority) else left
     return material
 
-# -- General helper functions -- #
+def bounding_box(stroke):
+    """
+    Returns the maximum and minimum coordinates (the bounding box) of the stroke's vertices
+    """
+    x, y = zip(*(svert.point for svert in stroke))
+    return (Vector((min(x), min(y))), Vector((max(x), max(y))))
 
+def normal_at_I0D(it: Interface0DIterator) -> Vector:
+    """Normal at an Interface0D object. In contrast to Normal2DF0D this 
+       function uses the actual data instead of underlying Fedge objects. 
+    """
+    if it.at_last and it.is_begin:
+        # corner-case
+        return Vector((0, 0))
+    elif it.at_last:
+        it.decrement()
+        a, b = it.object, next(it)
+    elif it.is_begin:
+        a, b = it.object, next(it)
+        # give iterator back in original state
+        it.decrement()
+    elif it.is_end:
+        # just fail hard: this shouldn not happen
+        raise StopIteration()
+    else:
+        # this case sometimes has a small difference with Normal2DF0D (1e-3 -ish)
+        it.decrement()
+        a = it.object
+        curr, b = next(it), next(it)
+        # give iterator back in original state
+        it.decrement()
+    return (b.point - a.point).orthogonal().normalized()
+
+def angle_x_normal(it: Interface0DIterator):
+    """unsigned angle between a Point's normal and the X axis, in radians"""
+    normal = normal_at_I0D(it)
+    return abs(atan2(normal[1], normal[0]))
+
+def curvature_from_stroke_vertex(svert):
+    """The 3D curvature of an stroke vertex' underlying geometry
+       The result is None or in the range [-inf, inf]"""
+    c1 = svert.first_svertex.curvatures
+    c2 = svert.second_svertex.curvatures
+    if c1 is None and c2 is None:
+        Kr = None 
+    elif c1 is None:
+        Kr = c2[4]
+    elif c2 is None:
+        Kr = c1[4]
+    else:
+        Kr = c1[4] + svert.t2d * (c2[4] - c1[4])
+    return Kr
+
+# -- General helper functions -- #
 
 @lru_cache(maxsize=32)
 def phase_to_direction(length):
@@ -134,9 +200,74 @@ def phase_to_direction(length):
         results.append((phase, Vector((cos(2 * pi * phase), sin(2 * pi * phase)))))
     return results
 
-# A named tuple primitive used for storing data that has an upper and
+
-# lower bound (e.g., thickness, range and certain values)
+
-BoundedProperty = namedtuple("BoundedProperty", ["min", "max", "delta"])
+# -- simplification of a set of points; based on simplify.js by Vladimir Agafonkin -- 
+#    https://mourner.github.io/simplify-js/ 
+
+def getSquareSegmentDistance(p, p1, p2):
+    """
+    Square distance between point and a segment
+    """
+    x, y = p1
+
+    dx, dy = (p2 - p1)
+
+    if dx or dy:
+        t = ((p.x - x) * dx + (p.y - y) * dy) / (dx * dx + dy * dy)
+
+        if t > 1:
+            x, y = p2
+        elif t > 0:
+            x += dx * t
+            y += dy * t
+
+    dx, dy = p.x - x, p.y - y
+    return dx * dx + dy * dy
+
+
+def simplifyDouglasPeucker(points, tolerance):
+    length = len(points)
+    markers = [0] * length
+
+    first = 0
+    last = length - 1
+
+    first_stack = []
+    last_stack = []
+
+    new_points = []
+
+    markers[first] = 1
+    markers[last] = 1
+
+    while last:
+        max_sqdist = 0
+
+        for i in range(first, last):
+            sqdist = getSquareSegmentDistance(points[i], points[first], points[last])
+
+            if sqdist > max_sqdist:
+                index = i
+                max_sqdist = sqdist
+
+        if max_sqdist > tolerance:
+            markers[index] = 1
+
+            first_stack.append(first)
+            last_stack.append(index)
+
+            first_stack.append(index)
+            last_stack.append(last)
+
+        first = first_stack.pop() if first_stack else None 
+        last = last_stack.pop() if last_stack else None 
+
+    return tuple(compress(points, markers))
+
+def simplify(points, tolerance):
+    """Simplifies a set of points"""
+    return simplifyDouglasPeucker(points, tolerance * tolerance)
 
 
 class BoundingBox:
@@ -346,7 +477,6 @@ def iter_distance_along_stroke(stroke):
 
 # -- mathematical operations -- #
 
-
 def stroke_curvature(it):
     """
     Compute the 2D curvature at the stroke vertex pointed by the iterator 'it'.
@@ -390,21 +520,23 @@ def stroke_normal(stroke):
     for use in geometry modifiers it is advised to
     cast this generator function to a tuple or list
     """
-    n = len(stroke) - 1
+    # n = len(stroke) - 1
+    it = iter(stroke)
+    yield from (normal_at_I0D(it) for _ in it)
 
-    for i, svert in enumerate(stroke):
+    #for i, svert in enumerate(stroke):
-        if i == 0:
+    #    if i == 0:
-            e = stroke[i + 1].point - svert.point
+    #        e = stroke[i + 1].point - svert.point
-            yield Vector((e[1], -e[0])).normalized()
+    #        yield Vector((e[1], -e[0])).normalized()
-        elif i == n:
+    #    elif i == n:
-            e = svert.point - stroke[i - 1].point
+    #        e = svert.point - stroke[i - 1].point
-            yield Vector((e[1], -e[0])).normalized()
+    #        yield Vector((e[1], -e[0])).normalized()
-        else:
+    #    else:
-            e1 = stroke[i + 1].point - svert.point
+    #        e1 = stroke[i + 1].point - svert.point
-            e2 = svert.point - stroke[i - 1].point
+    #        e2 = svert.point - stroke[i - 1].point
-            n1 = Vector((e1[1], -e1[0])).normalized()
+    #        n1 = Vector((e1[1], -e1[0])).normalized()
-            n2 = Vector((e2[1], -e2[0])).normalized()
+    #        n2 = Vector((e2[1], -e2[0])).normalized()
-            yield (n1 + n2).normalized()
+    #        yield (n1 + n2).normalized()
 
 
 def get_test_stroke():

release/scripts/freestyle/modules/parameter_editor.py

@@ -75,29 +75,34 @@ from freestyle.shaders import (
     ConstantColorShader,
     GuidingLinesShader,
     PolygonalizationShader,
-    SamplingShader,
-    SpatialNoiseShader,
-    StrokeShader,
-    StrokeTextureStepShader,
-    TipRemoverShader,
     pyBluePrintCirclesShader,
     pyBluePrintEllipsesShader,
     pyBluePrintSquaresShader,
     RoundCapShader,
+    SamplingShader,
+    SpatialNoiseShader,
     SquareCapShader,
+    StrokeShader,
+    StrokeTextureStepShader,
+    ThicknessNoiseShader as thickness_noise,
+    TipRemoverShader,
     )
 from freestyle.utils import (
+    angle_x_normal,
+    bound,
+    BoundedProperty,
     ContextFunctions,
+    curvature_from_stroke_vertex,
     getCurrentScene,
     iter_distance_along_stroke,
-    iter_t2d_along_stroke,
     iter_distance_from_camera,
     iter_distance_from_object,
     iter_material_value,
-    stroke_normal,
+    iter_t2d_along_stroke,
-    bound,
+    normal_at_I0D,
     pairwise,
-    BoundedProperty,
+    simplify,
+    stroke_normal,
     )
 from _freestyle import (
     blendRamp,
@@ -106,12 +111,16 @@ from _freestyle import (
     )
 
 import time
+import bpy
+import random
+
 from mathutils import Vector
-from math import pi, sin, cos, acos, radians
+from math import pi, sin, cos, acos, radians, atan2
 from itertools import cycle, tee
 
-# lists of callback functions
 # WARNING: highly experimental, not a stable API
+# lists of callback functions
+# used by the render_freestyle_svg addon
 callbacks_lineset_pre = []
 callbacks_modifiers_post = []
 callbacks_lineset_post = []
@@ -176,7 +185,13 @@ class CurveMappingModifier(ScalarBlendModifier):
         return (1.0 - t) if self.invert else t
 
     def CURVE(self, t):
-        return evaluateCurveMappingF(self.curve, 0, t)
+        # deprecated: return evaluateCurveMappingF(self.curve, 0, t)
+        curve = self.curve
+        curve.initialize()
+        result = curve.curves[0].evaluate(t)
+        # float precision errors in t can give a very weird result for evaluate.
+        # therefore, bound the result by the curve's min and max values 
+        return bound(curve.clip_min_y, result, curve.clip_max_y)
 
 
 class ThicknessModifierMixIn:
@@ -209,10 +224,20 @@ class ThicknessBlenderMixIn(ThicknessModifierMixIn):
         self.position = position
         self.ratio = ratio
 
-    def blend_thickness(self, svert, v):
+    def blend_thickness(self, svert, thickness, asymmetric=False):
-        """Blends and sets the thickness."""
+        """Blends and sets the thickness with respect to the position, blend mode and symmetry."""
+        if asymmetric:
+            right, left = thickness
+            self.blend_thickness_asymmetric(svert, right, left)
+        else:
+            if type(thickness) not in {int, float}:
+                thickness = sum(thickness)
+            self.blend_thickness_symmetric(svert, thickness)
+
+
+    def blend_thickness_symmetric(self, svert, v):
+        """Blends and sets the thickness. Thickness is equal on each side of the backbone"""
         outer, inner = svert.attribute.thickness
-        fe = svert.fedge
         v = self.blend(outer + inner, v)
 
         # Part 1: blend
@@ -227,21 +252,29 @@ class ThicknessBlenderMixIn(ThicknessModifierMixIn):
         else:
             raise ValueError("unknown thickness position: " + position)
 
-        # Part 2: set
+        self.set_thickness(svert, outer, inner)
-        if (fe.nature & Nature.BORDER):
+
+    def blend_thickness_asymmetric(self, svert, right, left):
+        """Blends and sets the thickness. Thickness may be unequal on each side of the backbone"""
+        # blend the thickness values for both sides. This way, the blend mode is supported.
+        old = svert.attribute.thickness
+        new = (right, left)
+        right, left = (self.blend(*val) for val in zip(old, new))
+
+        fe = svert.fedge
+        nature = fe.nature
+        if (nature & Nature.BORDER):
             if self.persp_camera:
                 point = -svert.point_3d.normalized()
                 dir = point.dot(fe.normal_left)
             else:
                 dir = fe.normal_left.z
             if dir < 0.0:  # the back side is visible
-                outer, inner = inner, outer
+                right, left = left, right
-        elif (fe.nature & Nature.SILHOUETTE):
+        elif (nature & Nature.SILHOUETTE):
             if fe.is_smooth:  # TODO more tests needed
-                outer, inner = inner, outer
+                right, left = left, right
-        else:
+        svert.attribute.thickness = (right, left)
-            outer = inner = (outer + inner) / 2
-        svert.attribute.thickness = (outer, inner)
 
 
 class BaseThicknessShader(StrokeShader, ThicknessModifierMixIn):
@@ -294,7 +327,7 @@ class ThicknessAlongStrokeShader(ThicknessBlenderMixIn, CurveMappingModifier):
                  blend, influence, mapping, invert, curve, value_min, value_max):
         ThicknessBlenderMixIn.__init__(self, thickness_position, thickness_ratio)
         CurveMappingModifier.__init__(self, blend, influence, mapping, invert, curve)
-        self.value = BoundedProperty(value_min, value_max, value_max - value_min)
+        self.value = BoundedProperty(value_min, value_max)
 
     def shade(self, stroke):
         for svert, t in zip(stroke, iter_t2d_along_stroke(stroke)):
@@ -308,7 +341,7 @@ class ColorDistanceFromCameraShader(ColorRampModifier):
     """Picks a color value from a ramp based on the vertex' distance from the camera."""
     def __init__(self, blend, influence, ramp, range_min, range_max):
         ColorRampModifier.__init__(self, blend, influence, ramp)
-        self.range = BoundedProperty(range_min, range_max, range_max - range_min)
+        self.range = BoundedProperty(range_min, range_max)
 
     def shade(self, stroke):
         it = iter_distance_from_camera(stroke, *self.range)
@@ -322,7 +355,7 @@ class AlphaDistanceFromCameraShader(CurveMappingModifier):
     """Picks an alpha value from a curve based on the vertex' distance from the camera"""
     def __init__(self, blend, influence, mapping, invert, curve, range_min, range_max):
         CurveMappingModifier.__init__(self, blend, influence, mapping, invert, curve)
-        self.range = BoundedProperty(range_min, range_max, range_max - range_min)
+        self.range = BoundedProperty(range_min, range_max)
 
     def shade(self, stroke):
         it = iter_distance_from_camera(stroke, *self.range)
@@ -338,8 +371,8 @@ class ThicknessDistanceFromCameraShader(ThicknessBlenderMixIn, CurveMappingModif
                  blend, influence, mapping, invert, curve, range_min, range_max, value_min, value_max):
         ThicknessBlenderMixIn.__init__(self, thickness_position, thickness_ratio)
         CurveMappingModifier.__init__(self, blend, influence, mapping, invert, curve)
-        self.range = BoundedProperty(range_min, range_max, range_max - range_min)
+        self.range = BoundedProperty(range_min, range_max)
-        self.value = BoundedProperty(value_min, value_max, value_max - value_min)
+        self.value = BoundedProperty(value_min, value_max)
 
     def shade(self, stroke):
         for (svert, t) in iter_distance_from_camera(stroke, *self.range):
@@ -355,7 +388,7 @@ class ColorDistanceFromObjectShader(ColorRampModifier):
         ColorRampModifier.__init__(self, blend, influence, ramp)
         if target is None:
             raise ValueError("ColorDistanceFromObjectShader: target can't be None ")
-        self.range = BoundedProperty(range_min, range_max, range_max - range_min)
+        self.range = BoundedProperty(range_min, range_max)
         # construct a model-view matrix
         matrix = getCurrentScene().camera.matrix_world.inverted()
         # get the object location in the camera coordinate
@@ -375,7 +408,7 @@ class AlphaDistanceFromObjectShader(CurveMappingModifier):
         CurveMappingModifier.__init__(self, blend, influence, mapping, invert, curve)
         if target is None:
             raise ValueError("AlphaDistanceFromObjectShader: target can't be None ")
-        self.range = BoundedProperty(range_min, range_max, range_max - range_min)
+        self.range = BoundedProperty(range_min, range_max)
         # construct a model-view matrix
         matrix = getCurrentScene().camera.matrix_world.inverted()
         # get the object location in the camera coordinate
@@ -397,8 +430,8 @@ class ThicknessDistanceFromObjectShader(ThicknessBlenderMixIn, CurveMappingModif
         CurveMappingModifier.__init__(self, blend, influence, mapping, invert, curve)
         if target is None:
             raise ValueError("ThicknessDistanceFromObjectShader: target can't be None ")
-        self.range = BoundedProperty(range_min, range_max, range_max - range_min)
+        self.range = BoundedProperty(range_min, range_max)
-        self.value = BoundedProperty(value_min, value_max, value_max - value_min)
+        self.value = BoundedProperty(value_min, value_max)
         # construct a model-view matrix
         matrix = getCurrentScene().camera.matrix_world.inverted()
         # get the object location in the camera coordinate
@@ -459,7 +492,7 @@ class ThicknessMaterialShader(ThicknessBlenderMixIn, CurveMappingModifier):
         ThicknessBlenderMixIn.__init__(self, thickness_position, thickness_ratio)
         CurveMappingModifier.__init__(self, blend, influence, mapping, invert, curve)
         self.attribute = material_attribute
-        self.value = BoundedProperty(value_min, value_max, value_max - value_min)
+        self.value = BoundedProperty(value_min, value_max)
         self.func = CurveMaterialF0D()
 
     def shade(self, stroke):
@@ -478,7 +511,7 @@ class CalligraphicThicknessShader(ThicknessBlenderMixIn, ScalarBlendModifier):
         ThicknessBlenderMixIn.__init__(self, thickness_position, thickness_ratio)
         ScalarBlendModifier.__init__(self, blend_type, influence)
         self.orientation = Vector((cos(orientation), sin(orientation)))
-        self.thickness = BoundedProperty(thickness_min, thickness_max, thickness_max - thickness_min)
+        self.thickness = BoundedProperty(thickness_min, thickness_max)
         self.func = VertexOrientation2DF0D()
 
     def shade(self, stroke):
@@ -493,11 +526,252 @@ class CalligraphicThicknessShader(ThicknessBlenderMixIn, ScalarBlendModifier):
                 b = self.thickness.min
             self.blend_thickness(svert, b)
 
+# - Tangent Modifiers - #
+
+class TangentColorShader(ColorRampModifier):
+    """Color based on the direction of the stroke"""
+    def shade(self, stroke):
+        it = Interface0DIterator(stroke)
+        for svert in it:
+            angle = angle_x_normal(it)
+            fac = self.evaluate(angle / pi)
+
+            a = svert.attribute.color
+            svert.attribute.color = self.blend_ramp(a, fac)
+
+
+class TangentAlphaShader(CurveMappingModifier):
+    """Alpha transparency based on the direction of the stroke"""
+    def shade(self, stroke):
+        it = Interface0DIterator(stroke)
+        for svert in it:
+            angle = angle_x_normal(it)
+            fac = self.evaluate(angle / pi)
+
+            a = svert.attribute.alpha
+            svert.attribute.alpha = self.blend(a, fac)
+
+
+class TangentThicknessShader(ThicknessBlenderMixIn, CurveMappingModifier):
+    """Thickness based on the direction of the stroke"""
+    def __init__(self, thickness_position, thickness_ratio, blend, influence, mapping, invert, curve, 
+                 thickness_min, thickness_max):
+        ThicknessBlenderMixIn.__init__(self, thickness_position, thickness_ratio)
+        CurveMappingModifier.__init__(self, blend, influence, mapping, invert, curve)
+        self.thickness = BoundedProperty(thickness_min, thickness_max)
+
+    def shade(self, stroke):
+        it = Interface0DIterator(stroke)
+        for svert in it:
+            angle = angle_x_normal(it)
+            thickness = self.thickness.min + self.evaluate(angle / pi) * self.thickness.delta
+            self.blend_thickness(svert, thickness)
+
+# - Noise Modifiers - #
+class NoiseShader:
+    """Base class for noise shaders"""
+    def __init__(self, amplitude, period, seed=512):
+        self.amplitude = amplitude
+        self.scale = 1 / period / seed
+        self.seed = seed 
+
+    def noisegen(self, stroke, n1=Noise(), n2=Noise()):
+        """Produces two noise values per StrokeVertex for every vertex in the stroke"""
+        initU1 = stroke.length_2d * self.seed + n1.rand(512) * self.seed
+        initU2 = stroke.length_2d * self.seed + n2.rand() * self.seed
+
+        for svert in stroke:
+            a = n1.turbulence_smooth(self.scale * svert.curvilinear_abscissa + initU1, 2)
+            b = n2.turbulence_smooth(self.scale * svert.curvilinear_abscissa + initU2, 2)
+            yield (svert, a, b)
+ 
+
+class ThicknessNoiseShader(ThicknessBlenderMixIn, ScalarBlendModifier, NoiseShader):
+    """Thickness based on pseudo-noise"""
+    def __init__(self, thickness_position, thickness_ratio, blend_type, influence, amplitude, period, seed=512, asymmetric=True):
+        ScalarBlendModifier.__init__(self, blend_type, influence)
+        ThicknessBlenderMixIn.__init__(self, thickness_position, thickness_ratio)
+        NoiseShader.__init__(self, amplitude, period, seed)
+        self.asymmetric = asymmetric
+
+    def shade(self, stroke):
+        for svert, noiseval1, noiseval2 in self.noisegen(stroke):
+            (r, l) = svert.attribute.thickness
+            l += noiseval1 * self.amplitude
+            r += noiseval2 * self.amplitude
+            self.blend_thickness(svert, (r, l), self.asymmetric)
+
+
+class ColorNoiseShader(ColorRampModifier, NoiseShader):
+    """Color based on pseudo-noise"""
+    def __init__(self, blend, influence, ramp, amplitude, period, seed=512):
+        ColorRampModifier.__init__(self, blend, influence, ramp)
+        NoiseShader.__init__(self, amplitude, period, seed)
+
+    def shade(self, stroke): 
+        for svert, noiseval1, noiseval2 in self.noisegen(stroke):
+            position = abs(noiseval1 + noiseval2)
+            svert.attribute.color = self.blend_ramp(svert.attribute.color, self.evaluate(position))
+
+
+class AlphaNoiseShader(CurveMappingModifier, NoiseShader):
+    """Alpha transparency on based pseudo-noise"""
+    def __init__(self, blend, influence, mapping, invert, curve, amplitude, period, seed=512):
+        CurveMappingModifier.__init__(self, blend, influence, mapping, invert, curve)
+        NoiseShader.__init__(self, amplitude, period, seed)
+
+    def shade(self, stroke, n1=Noise(), n2=Noise()):
+        for svert, noiseval1, noiseval2 in self.noisegen(stroke):
+            position = abs(noiseval1 + noiseval2)
+            svert.attribute.alpha = self.blend(svert.attribute.alpha, self.evaluate(position))
+
+# - Crease Angle Modifiers - #
+
+def crease_angle(svert):
+    """Returns the crease angle between the StrokeVertex' two adjacent faces (in radians)"""
+    fe = svert.fedge
+    if not fe or fe.is_smooth or not (fe.nature & Nature.CREASE):
+        return None
+    # make sure that the input is within the domain of the acos function
+    product = bound(-1.0, -fe.normal_left.dot(fe.normal_right), 1.0)
+    return acos(product)
+
+
+class CreaseAngleColorShader(ColorRampModifier):
+    """Color based on the crease angle between two adjacent faces on the underlying geometry"""
+    def __init__(self, blend, influence, ramp, angle_min, angle_max):
+        ColorRampModifier.__init__(self, blend, influence, ramp)
+        # angles are (already) in radians
+        self.angle = BoundedProperty(angle_min, angle_max)
+
+    def shade(self, stroke):
+        for svert in stroke:
+            angle = crease_angle(svert)
+            if angle is None:
+                continue
+            t = self.angle.interpolate(angle)
+            svert.attribute.color = self.blend_ramp(svert.attribute.color, self.evaluate(t))
+
+
+class CreaseAngleAlphaShader(CurveMappingModifier):
+    """Alpha transparency based on the crease angle between two adjacent faces on the underlying geometry"""
+    def __init__(self, blend, influence, mapping, invert, curve, angle_min, angle_max):
+        CurveMappingModifier.__init__(self, blend, influence, mapping, invert, curve)
+        # angles are (already) in radians
+        self.angle = BoundedProperty(angle_min, angle_max)
+
+    def shade(self, stroke):
+        for svert in stroke:
+            angle = crease_angle(svert)
+            if angle is None:
+                continue
+            t = self.angle.interpolate(angle)
+            svert.attribute.alpha = self.blend(svert.attribute.alpha, self.evaluate(t))
+
+
+class CreaseAngleThicknessShader(ThicknessBlenderMixIn, CurveMappingModifier):
+    """Thickness based on the crease angle between two adjacent faces on the underlying geometry"""
+    def __init__(self, thickness_position, thickness_ratio, blend, influence, mapping, invert, curve,
+                 angle_min, angle_max, thickness_min, thickness_max):
+        ThicknessBlenderMixIn.__init__(self, thickness_position, thickness_ratio)
+        CurveMappingModifier.__init__(self, blend, influence, mapping, invert, curve)
+        # angles are (already) in radians
+        self.angle = BoundedProperty(angle_min, angle_max)
+        self.thickness = BoundedProperty(thickness_min, thickness_max)
+ 
+
+    def shade(self, stroke):
+        for svert in stroke:
+            angle = crease_angle(svert)
+            if angle is None:
+                continue
+            t = self.angle.interpolate(angle)
+            thickness = self.thickness.min + self.evaluate(t) * self.thickness.delta
+            self.blend_thickness(svert, thickness)
+
+# - Curvature3D Modifiers - #
+
+def normalized_absolute_curvature(svert, bounded_curvature):
+    """
+    Gives the absolute curvature in range [0, 1].
+    
+    The actual curvature (Kr) value can be anywhere in the range [-inf, inf], where convex curvature
+    yields a positive value, and concave a negative one. These shaders only look for the magnitude 
+    of the 3D curvature, hence the abs()
+    """
+    curvature = curvature_from_stroke_vertex(svert)
+    if curvature is None:
+        return 0.0
+    return bounded_curvature.interpolate(abs(curvature))
+
+class Curvature3DColorShader(ColorRampModifier):
+    """Color based on the 3D curvature of the underlying geometry"""
+    def __init__(self, blend, influence, ramp, curvature_min, curvature_max):
+        ColorRampModifier.__init__(self, blend, influence, ramp)
+        self.curvature = BoundedProperty(curvature_min, curvature_max)
+
+    def shade(self, stroke):
+        for svert in stroke:
+            t = normalized_absolute_curvature(svert, self.curvature)
+            
+            a = svert.attribute.color
+            b = self.evaluate(t)
+            svert.attribute.color = self.blend_ramp(a, b)
+
+
+class Curvature3DAlphaShader(CurveMappingModifier):
+    """Alpha based on the 3D curvature of the underlying geometry"""
+    def __init__(self, blend, influence, mapping, invert, curve, curvature_min, curvature_max):
+        CurveMappingModifier.__init__(self, blend, influence, mapping, invert, curve)
+        self.curvature = BoundedProperty(curvature_min, curvature_max)
+
+    def shade(self, stroke):
+        for svert in stroke:
+            t = normalized_absolute_curvature(svert, self.curvature)
+            a = svert.attribute.alpha
+            b = self.evaluate(t)
+            svert.attribute.alpha = self.blend(a, b)
+
+
+class Curvature3DThicknessShader(ThicknessBlenderMixIn, CurveMappingModifier):
+    """Alpha based on the 3D curvature of the underlying geometry"""
+    def __init__(self, thickness_position, thickness_ratio, blend, influence, mapping, invert, curve,
+                 curvature_min, curvature_max, thickness_min, thickness_max):
+        ThicknessBlenderMixIn.__init__(self, thickness_position, thickness_ratio)
+        CurveMappingModifier.__init__(self, blend, influence, mapping, invert, curve)
+        self.curvature = BoundedProperty(curvature_min, curvature_max)
+        self.thickness = BoundedProperty(thickness_min, thickness_max)
+
+
+    def shade(self, stroke):
+        for svert in stroke:
+            t = normalized_absolute_curvature(svert, self.curvature)
+            thickness = self.thickness.min + self.evaluate(t) * self.thickness.delta
+            self.blend_thickness(svert, thickness)
+
 
 # Geometry modifiers
 
+class SimplificationShader(StrokeShader):
+    """Simplifies a stroke by merging points together"""
+    def __init__(self, tolerance):
+        StrokeShader.__init__(self)
+        self.tolerance = tolerance
+
+    def shade(self, stroke):
+        points = tuple(svert.point for svert in stroke)
+        points_simplified = simplify(points, tolerance=self.tolerance)
+
+        it = iter(stroke)
+        for svert, point in zip(it, points_simplified):
+            svert.point = point
+
+        for svert in tuple(it):
+            stroke.remove_vertex(svert)
+
+
 class SinusDisplacementShader(StrokeShader):
-    """Displaces the stroke in a sinewave-like shape."""
+    """Displaces the stroke in a sine wave-like shape."""
     def __init__(self, wavelength, amplitude, phase):
         StrokeShader.__init__(self)
         self.wavelength = wavelength
@@ -540,7 +814,7 @@ class PerlinNoise1DShader(StrokeShader):
 class PerlinNoise2DShader(StrokeShader):
     """
     Displaces the stroke using the strokes coordinates.  This means
-    that in a scene no strokes will be distorded identically.
+    that in a scene no strokes will be distorted identically.
 
     More information on the noise shaders can be found at:
     freestyleintegration.wordpress.com/2011/09/25/development-updates-on-september-25/
@@ -883,7 +1157,6 @@ class Seed:
 
 _seed = Seed()
 
-
 def get_dashed_pattern(linestyle):
     """Extracts the dashed pattern from the various UI options """
     pattern = []
@@ -1066,6 +1339,8 @@ def process(layer_name, lineset_name):
         elif m.type == 'BEZIER_CURVE':
             shaders_list.append(BezierCurveShader(
                 m.error))
+        elif m.type == 'SIMPLIFICATION':
+            shaders_list.append(SimplificationShader(m.tolerance))
         elif m.type == 'SINUS_DISPLACEMENT':
             shaders_list.append(SinusDisplacementShader(
                 m.wavelength, m.amplitude, m.phase))
@@ -1137,6 +1412,21 @@ def process(layer_name, lineset_name):
             shaders_list.append(ColorMaterialShader(
                 m.blend, m.influence, m.color_ramp, m.material_attribute,
                 m.use_ramp))
+        elif m.type == 'TANGENT':
+            shaders_list.append(TangentColorShader(
+                m.blend, m.influence, m.color_ramp))
+        elif m.type == 'CREASE_ANGLE':
+            shaders_list.append(CreaseAngleColorShader(
+                m.blend, m.influence, m.color_ramp,
+                m.angle_min, m.angle_max))
+        elif m.type == 'CURVATURE_3D':
+            shaders_list.append(Curvature3DColorShader(
+                m.blend, m.influence, m.color_ramp,
+                m.curvature_min, m.curvature_max))
+        elif m.type == 'NOISE':
+            shaders_list.append(ColorNoiseShader(
+                m.blend, m.influence, m.color_ramp,
+                m.amplitude, m.period, m.seed))
     for m in linestyle.alpha_modifiers:
         if not m.use:
             continue
@@ -1155,6 +1445,21 @@ def process(layer_name, lineset_name):
             shaders_list.append(AlphaMaterialShader(
                 m.blend, m.influence, m.mapping, m.invert, m.curve,
                 m.material_attribute))
+        elif m.type == 'TANGENT':
+            shaders_list.append(TangentAlphaShader(
+                m.blend, m.influence, m.mapping, m.invert, m.curve,))
+        elif m.type == 'CREASE_ANGLE':
+            shaders_list.append(CreaseAngleAlphaShader(
+                m.blend, m.influence, m.mapping, m.invert, m.curve,
+                m.angle_min, m.angle_max))
+        elif m.type == 'CURVATURE_3D':
+            shaders_list.append(Curvature3DAlphaShader(
+                m.blend, m.influence, m.mapping, m.invert, m.curve,
+                m.curvature_min, m.curvature_max))
+        elif m.type == 'NOISE':
+            shaders_list.append(AlphaNoiseShader(
+                m.blend, m.influence, m.mapping, m.invert, m.curve,
+                m.amplitude, m.period, m.seed))
     for m in linestyle.thickness_modifiers:
         if not m.use:
             continue
@@ -1183,6 +1488,28 @@ def process(layer_name, lineset_name):
                 thickness_position, linestyle.thickness_ratio,
                 m.blend, m.influence,
                 m.orientation, m.thickness_min, m.thickness_max))
+        elif m.type == 'TANGENT':
+            shaders_list.append(TangentThicknessShader(
+                thickness_position, linestyle.thickness_ratio, 
+                m.blend, m.influence, m.mapping, m.invert, m.curve,
+                m.thickness_min, m.thickness_max))
+        elif m.type == 'NOISE':
+            shaders_list.append(ThicknessNoiseShader(
+                thickness_position, linestyle.thickness_ratio,
+                m.blend, m.influence, 
+                m.amplitude, m.period, m.seed, m.use_asymmetric))
+        elif m.type == 'CREASE_ANGLE':
+            shaders_list.append(CreaseAngleThicknessShader(
+                thickness_position, linestyle.thickness_ratio,
+                m.blend, m.influence, m.mapping, m.invert, m.curve,
+                m.angle_min, m.angle_max, m.thickness_min, m.thickness_max))
+        elif m.type == 'CURVATURE_3D':
+            shaders_list.append(Curvature3DThicknessShader(
+                thickness_position, linestyle.thickness_ratio,
+                m.blend, m.influence, m.mapping, m.invert, m.curve,
+                m.curvature_min, m.curvature_max, m.thickness_min, m.thickness_max))
+        else:
+            raise RuntimeError("No Thickness modifier with type", type(m), m)
     # -- Textures -- #
     has_tex = False
     if scene.render.use_shading_nodes:

release/scripts/startup/bl_ui/properties_freestyle.py

@@ -283,6 +283,10 @@ class RENDERLAYER_PT_freestyle_linestyle(RenderLayerFreestyleEditorButtonsPanel,
         sub.operator("scene.freestyle_modifier_move", icon='TRIA_DOWN', text="").direction = 'DOWN'
         sub.operator("scene.freestyle_modifier_remove", icon='X', text="")
 
+    def draw_modifier_box_error(self, box, modifier, message):
+        row = box.row()
+        row.label(text=message, icon="ERROR")
+
     def draw_modifier_common(self, box, modifier):
         row = box.row()
         row.prop(modifier, "blend", text="")
@@ -351,6 +355,33 @@ class RENDERLAYER_PT_freestyle_linestyle(RenderLayerFreestyleEditorButtonsPanel,
                 if show_ramp:
                     self.draw_modifier_color_ramp_common(box, modifier, False)
 
+            elif modifier.type == 'TANGENT':
+                self.draw_modifier_color_ramp_common(box, modifier, False)
+
+            elif modifier.type == 'NOISE':
+                self.draw_modifier_color_ramp_common(box, modifier, False)
+                row = box.row(align=False)
+                row.prop(modifier, "amplitude")
+                row.prop(modifier, "period")
+                row.prop(modifier, "seed")
+
+            elif modifier.type == 'CREASE_ANGLE':
+                self.draw_modifier_color_ramp_common(box, modifier, False)
+                row = box.row(align=True)
+                row.prop(modifier, "angle_min")
+                row.prop(modifier, "angle_max")
+
+            elif modifier.type == 'CURVATURE_3D':
+                self.draw_modifier_color_ramp_common(box, modifier, False)
+                row = box.row(align=True)
+                row.prop(modifier, "curvature_min")
+                row.prop(modifier, "curvature_max")
+                freestyle = context.scene.render.layers.active.freestyle_settings
+                if not freestyle.use_smoothness:
+                    message = "Enable Face Smoothness to use this modifier"
+                    self.draw_modifier_box_error(col.box(), modifier, message)
+
+
     def draw_alpha_modifier(self, context, modifier):
         layout = self.layout
 
@@ -380,6 +411,32 @@ class RENDERLAYER_PT_freestyle_linestyle(RenderLayerFreestyleEditorButtonsPanel,
                 box.prop(modifier, "material_attribute", text="")
                 self.draw_modifier_curve_common(box, modifier, False, False)
 
+            elif modifier.type == 'TANGENT':
+                self.draw_modifier_curve_common(box, modifier, False, False)
+
+            elif modifier.type == 'NOISE':
+                self.draw_modifier_curve_common(box, modifier, False, False)
+                row = box.row(align=False)
+                row.prop(modifier, "amplitude")
+                row.prop(modifier, "period")
+                row.prop(modifier, "seed")
+
+            elif modifier.type == 'CREASE_ANGLE':
+                self.draw_modifier_curve_common(box, modifier, False, False)
+                row = box.row(align=True)
+                row.prop(modifier, "angle_min")
+                row.prop(modifier, "angle_max")
+
+            elif modifier.type == 'CURVATURE_3D':
+                self.draw_modifier_curve_common(box, modifier, False, False)
+                row = box.row(align=True)
+                row.prop(modifier, "curvature_min")
+                row.prop(modifier, "curvature_max")
+                freestyle = context.scene.render.layers.active.freestyle_settings
+                if not freestyle.use_smoothness:
+                    message = "Enable Face Smoothness to use this modifier"
+                    self.draw_modifier_box_error(col.box(), modifier, message)
+
     def draw_thickness_modifier(self, context, modifier):
         layout = self.layout
 
@@ -415,6 +472,45 @@ class RENDERLAYER_PT_freestyle_linestyle(RenderLayerFreestyleEditorButtonsPanel,
                 row.prop(modifier, "thickness_min")
                 row.prop(modifier, "thickness_max")
 
+            elif modifier.type == 'TANGENT':
+                self.draw_modifier_curve_common(box, modifier, False, False)
+                self.mapping = 'CURVE'
+                row = box.row(align=True)
+                row.prop(modifier, "thickness_min")
+                row.prop(modifier, "thickness_max")
+
+            elif modifier.type == 'NOISE':
+                row = box.row(align=False)
+                row.prop(modifier, "amplitude")
+                row.prop(modifier, "period")
+                row = box.row(align=False)
+                row.prop(modifier, "seed")
+                row.prop(modifier, "use_asymmetric")
+
+            elif modifier.type == 'CREASE_ANGLE':
+                self.draw_modifier_curve_common(box, modifier, False, False)
+                row = box.row(align=True)
+                row.prop(modifier, "thickness_min")
+                row.prop(modifier, "thickness_max")
+                row = box.row(align=True)
+                row.prop(modifier, "angle_min")
+                row.prop(modifier, "angle_max")
+
+
+            elif modifier.type == 'CURVATURE_3D':
+                self.draw_modifier_curve_common(box, modifier, False, False)
+                row = box.row(align=True)
+                row.prop(modifier, "thickness_min")
+                row.prop(modifier, "thickness_max")
+                row = box.row(align=True)
+                row.prop(modifier, "curvature_min")
+                row.prop(modifier, "curvature_max")
+                freestyle = context.scene.render.layers.active.freestyle_settings
+                if not freestyle.use_smoothness:
+                    message = "Enable Face Smoothness to use this modifier"
+                    self.draw_modifier_box_error(col.box(), modifier, message)
+
+
     def draw_geometry_modifier(self, context, modifier):
         layout = self.layout
 
@@ -512,6 +608,10 @@ class RENDERLAYER_PT_freestyle_linestyle(RenderLayerFreestyleEditorButtonsPanel,
                 row.prop(modifier, "scale_y")
                 box.prop(modifier, "angle")
 
+            elif modifier.type == 'SIMPLIFICATION':
+                box.prop(modifier, "tolerance")
+
+
     def draw(self, context):
         layout = self.layout
 

source/blender/blenkernel/intern/linestyle.c

@@ -73,6 +73,11 @@ static const char *modifier_name[LS_MODIFIER_NUM] = {
 	"Blueprint",
 	"2D Offset",
 	"2D Transform",
+	"Tangent",
+	"Noise",
+	"Crease Angle",
+	"Simplification",
+	"3D Curvature",
 };
 
 static void default_linestyle_settings(FreestyleLineStyle *linestyle)
@@ -268,6 +273,18 @@ static LineStyleModifier *alloc_color_modifier(const char *name, int type)
 		case LS_MODIFIER_MATERIAL:
 			size = sizeof(LineStyleColorModifier_Material);
 			break;
+		case LS_MODIFIER_TANGENT:
+			size = sizeof(LineStyleColorModifier_Tangent);
+			break;
+		case LS_MODIFIER_NOISE:
+			size = sizeof(LineStyleColorModifier_Noise);
+			break;
+		case LS_MODIFIER_CREASE_ANGLE:
+			size = sizeof(LineStyleColorModifier_CreaseAngle);
+			break;
+		case LS_MODIFIER_CURVATURE_3D:
+			size = sizeof(LineStyleColorModifier_Curvature_3D);
+			break;
 		default:
 			return NULL; /* unknown modifier type */
 	}
@@ -304,6 +321,25 @@ LineStyleModifier *BKE_linestyle_color_modifier_add(FreestyleLineStyle *linestyl
 			((LineStyleColorModifier_Material *)m)->color_ramp = add_colorband(1);
 			((LineStyleColorModifier_Material *)m)->mat_attr = LS_MODIFIER_MATERIAL_LINE;
 			break;
+		case LS_MODIFIER_TANGENT:
+			((LineStyleColorModifier_Tangent *)m)->color_ramp = add_colorband(1);
+			break;
+		case LS_MODIFIER_NOISE:
+			((LineStyleColorModifier_Noise *)m)->color_ramp = add_colorband(1);
+			((LineStyleColorModifier_Noise *)m)->amplitude = 10.0f;
+			((LineStyleColorModifier_Noise *)m)->period = 10.0f;
+			((LineStyleColorModifier_Noise *)m)->seed = 512;
+			break;
+		case LS_MODIFIER_CREASE_ANGLE:
+			((LineStyleColorModifier_CreaseAngle *)m)->color_ramp = add_colorband(1);
+			((LineStyleColorModifier_CreaseAngle *)m)->min_angle = 0.0f;
+			((LineStyleColorModifier_CreaseAngle *)m)->max_angle = DEG2RADF(180.0f);
+			break;
+		case LS_MODIFIER_CURVATURE_3D:
+			((LineStyleColorModifier_Curvature_3D *)m)->color_ramp = add_colorband(1);
+			((LineStyleColorModifier_Curvature_3D *)m)->min_curvature = 0.0f;
+			((LineStyleColorModifier_Curvature_3D *)m)->max_curvature = 0.5f;
+			break;
 		default:
 			return NULL; /* unknown modifier type */
 	}
@@ -362,6 +398,41 @@ LineStyleModifier *BKE_linestyle_color_modifier_copy(FreestyleLineStyle *linesty
 			q->mat_attr = p->mat_attr;
 			break;
 		}
+		case LS_MODIFIER_TANGENT:
+		{
+			LineStyleColorModifier_Tangent *p = (LineStyleColorModifier_Tangent *)m;
+			LineStyleColorModifier_Tangent *q = (LineStyleColorModifier_Tangent *)new_m;
+			q->color_ramp = MEM_dupallocN(p->color_ramp);
+			break;
+		}
+		case LS_MODIFIER_NOISE:
+		{
+			LineStyleColorModifier_Noise *p = (LineStyleColorModifier_Noise *)m;
+			LineStyleColorModifier_Noise *q = (LineStyleColorModifier_Noise *)new_m;
+			q->color_ramp = MEM_dupallocN(p->color_ramp);
+			q->amplitude = p->amplitude;
+			q->period = p->period;
+			q->seed = p->seed;
+			break;
+		}
+		case LS_MODIFIER_CREASE_ANGLE:
+		{
+			LineStyleColorModifier_CreaseAngle *p = (LineStyleColorModifier_CreaseAngle *)m;
+			LineStyleColorModifier_CreaseAngle *q = (LineStyleColorModifier_CreaseAngle *)new_m;
+			q->color_ramp = MEM_dupallocN(p->color_ramp);
+			q->min_angle = p->min_angle;
+			q->max_angle = p->max_angle;
+			break;
+		}
+		case LS_MODIFIER_CURVATURE_3D:
+		{
+			LineStyleColorModifier_Curvature_3D *p = (LineStyleColorModifier_Curvature_3D *)m;
+			LineStyleColorModifier_Curvature_3D *q = (LineStyleColorModifier_Curvature_3D *)new_m;
+			q->color_ramp = MEM_dupallocN(p->color_ramp);
+			q->min_curvature = p->min_curvature;
+			q->max_curvature = p->max_curvature;
+			break;
+		}
 		default:
 			return NULL; /* unknown modifier type */
 	}
@@ -387,6 +458,18 @@ int BKE_linestyle_color_modifier_remove(FreestyleLineStyle *linestyle, LineStyle
 		case LS_MODIFIER_MATERIAL:
 			MEM_freeN(((LineStyleColorModifier_Material *)m)->color_ramp);
 			break;
+		case LS_MODIFIER_TANGENT:
+			MEM_freeN(((LineStyleColorModifier_Tangent *)m)->color_ramp);
+			break;
+		case LS_MODIFIER_NOISE:
+			MEM_freeN(((LineStyleColorModifier_Noise *)m)->color_ramp);
+			break;
+		case LS_MODIFIER_CREASE_ANGLE:
+			MEM_freeN(((LineStyleColorModifier_CreaseAngle *)m)->color_ramp);
+			break;
+		case LS_MODIFIER_CURVATURE_3D:
+			MEM_freeN(((LineStyleColorModifier_Curvature_3D *)m)->color_ramp);
+			break;
 	}
 	BLI_freelinkN(&linestyle->color_modifiers, m);
 	return 0;
@@ -409,6 +492,18 @@ static LineStyleModifier *alloc_alpha_modifier(const char *name, int type)
 		case LS_MODIFIER_MATERIAL:
 			size = sizeof(LineStyleAlphaModifier_Material);
 			break;
+		case LS_MODIFIER_TANGENT:
+			size = sizeof(LineStyleAlphaModifier_Tangent);
+			break;
+		case LS_MODIFIER_NOISE:
+			size = sizeof(LineStyleAlphaModifier_Noise);
+			break;
+		case LS_MODIFIER_CREASE_ANGLE:
+			size = sizeof(LineStyleAlphaModifier_CreaseAngle);
+			break;
+		case LS_MODIFIER_CURVATURE_3D:
+			size = sizeof(LineStyleAlphaModifier_Curvature_3D);
+			break;
 		default:
 			return NULL; /* unknown modifier type */
 	}
@@ -453,6 +548,37 @@ LineStyleModifier *BKE_linestyle_alpha_modifier_add(FreestyleLineStyle *linestyl
 			p->mat_attr = LS_MODIFIER_MATERIAL_LINE_A;
 			break;
 		}
+		case LS_MODIFIER_TANGENT:
+		{
+			LineStyleAlphaModifier_Tangent *p = (LineStyleAlphaModifier_Tangent *)m;
+			p->curve = curvemapping_add(1, 0.0f, 0.0f, 1.0f, 1.0f);
+			break;
+		}
+		case LS_MODIFIER_NOISE:
+		{
+			LineStyleAlphaModifier_Noise *p = (LineStyleAlphaModifier_Noise *)m;
+			p->curve = curvemapping_add(1, 0.0f, 0.0f, 1.0f, 1.0f);
+			((LineStyleAlphaModifier_Noise *)m)->amplitude = 10.0f;
+			((LineStyleAlphaModifier_Noise *)m)->period = 10.0f;
+			((LineStyleAlphaModifier_Noise *)m)->seed = 512;
+			break;
+		}
+		case LS_MODIFIER_CREASE_ANGLE:
+		{
+			LineStyleAlphaModifier_CreaseAngle *p = (LineStyleAlphaModifier_CreaseAngle *)m;
+			p->curve = curvemapping_add(1, 0.0f, 0.0f, 1.0f, 1.0f);
+			((LineStyleAlphaModifier_CreaseAngle *)m)->min_angle = 0.0f;
+			((LineStyleAlphaModifier_CreaseAngle *)m)->max_angle = DEG2RADF(180.0f);
+			break;
+		}
+		case LS_MODIFIER_CURVATURE_3D:
+		{
+			LineStyleAlphaModifier_Curvature_3D *p = (LineStyleAlphaModifier_Curvature_3D *)m;
+			p->curve = curvemapping_add(1, 0.0f, 0.0f, 1.0f, 1.0f);
+			((LineStyleAlphaModifier_Curvature_3D *)m)->min_curvature = 0.0f;
+			((LineStyleAlphaModifier_Curvature_3D *)m)->max_curvature = 0.5f;
+			break;
+		}
 		default:
 			return NULL; /* unknown modifier type */
 	}
@@ -511,6 +637,45 @@ LineStyleModifier *BKE_linestyle_alpha_modifier_copy(FreestyleLineStyle *linesty
 			q->mat_attr = p->mat_attr;
 			break;
 		}
+		case LS_MODIFIER_TANGENT:
+		{
+			LineStyleAlphaModifier_Tangent *p = (LineStyleAlphaModifier_Tangent *)m;
+			LineStyleAlphaModifier_Tangent *q = (LineStyleAlphaModifier_Tangent *)new_m;
+			q->curve = curvemapping_copy(p->curve);
+			q->flags = p->flags;
+			break;
+		}
+		case LS_MODIFIER_NOISE:
+		{
+			LineStyleAlphaModifier_Noise *p = (LineStyleAlphaModifier_Noise *)m;
+			LineStyleAlphaModifier_Noise *q = (LineStyleAlphaModifier_Noise *)new_m;
+			q->curve = curvemapping_copy(p->curve);
+			q->flags = p->flags;
+			q->amplitude = p->amplitude;
+			q->period = p->period;
+			q->seed = p->seed;
+			break;
+		}
+		case LS_MODIFIER_CREASE_ANGLE:
+		{
+			LineStyleAlphaModifier_CreaseAngle *p = (LineStyleAlphaModifier_CreaseAngle *)m;
+			LineStyleAlphaModifier_CreaseAngle *q = (LineStyleAlphaModifier_CreaseAngle *)new_m;
+			q->curve = curvemapping_copy(p->curve);
+			q->flags = p->flags;
+			q->min_angle = p->min_angle;
+			q->max_angle = p->max_angle;
+			break;
+		}
+		case LS_MODIFIER_CURVATURE_3D:
+		{
+			LineStyleAlphaModifier_Curvature_3D *p = (LineStyleAlphaModifier_Curvature_3D *)m;
+			LineStyleAlphaModifier_Curvature_3D *q = (LineStyleAlphaModifier_Curvature_3D *)new_m;
+			q->curve = curvemapping_copy(p->curve);
+			q->flags = p->flags;
+			q->min_curvature = p->min_curvature;
+			q->max_curvature = p->max_curvature;
+			break;
+		}
 		default:
 			return NULL; /* unknown modifier type */
 	}
@@ -536,6 +701,18 @@ int BKE_linestyle_alpha_modifier_remove(FreestyleLineStyle *linestyle, LineStyle
 		case LS_MODIFIER_MATERIAL:
 			curvemapping_free(((LineStyleAlphaModifier_Material *)m)->curve);
 			break;
+		case LS_MODIFIER_TANGENT:
+			curvemapping_free(((LineStyleAlphaModifier_Tangent *)m)->curve);
+			break;
+		case LS_MODIFIER_NOISE:
+			curvemapping_free(((LineStyleAlphaModifier_Noise *)m)->curve);
+			break;
+		case LS_MODIFIER_CREASE_ANGLE:
+			curvemapping_free(((LineStyleAlphaModifier_CreaseAngle *)m)->curve);
+			break;
+		case LS_MODIFIER_CURVATURE_3D:
+			curvemapping_free(((LineStyleAlphaModifier_Curvature_3D *)m)->curve);
+			break;
 	}
 	BLI_freelinkN(&linestyle->alpha_modifiers, m);
 	return 0;
@@ -561,6 +738,18 @@ static LineStyleModifier *alloc_thickness_modifier(const char *name, int type)
 		case LS_MODIFIER_CALLIGRAPHY:
 			size = sizeof(LineStyleThicknessModifier_Calligraphy);
 			break;
+		case LS_MODIFIER_TANGENT:
+			size = sizeof(LineStyleThicknessModifier_Tangent);
+			break;
+		case LS_MODIFIER_NOISE:
+			size = sizeof(LineStyleThicknessModifier_Noise);
+			break;
+		case LS_MODIFIER_CREASE_ANGLE:
+			size = sizeof(LineStyleThicknessModifier_CreaseAngle);
+			break;
+		case LS_MODIFIER_CURVATURE_3D:
+			size = sizeof(LineStyleThicknessModifier_Curvature_3D);
+			break;
 		default:
 			return NULL; /* unknown modifier type */
 	}
@@ -622,6 +811,43 @@ LineStyleModifier *BKE_linestyle_thickness_modifier_add(FreestyleLineStyle *line
 			p->orientation = DEG2RADF(60.0f);
 			break;
 		}
+		case LS_MODIFIER_TANGENT:
+		{
+			LineStyleThicknessModifier_Tangent *p = (LineStyleThicknessModifier_Tangent *)m;
+			p->curve = curvemapping_add(1, 0.0f, 0.0f, 1.0f, 1.0f);
+			p->min_thickness = 1.0f;
+			p->max_thickness = 10.0f;
+			break;
+		}
+		case LS_MODIFIER_NOISE:
+		{
+			LineStyleThicknessModifier_Noise *p = (LineStyleThicknessModifier_Noise *)m;
+			p->period = 10.0f;
+			p->amplitude = 10.0f;
+			p->seed = 512;
+			p->flags = LS_THICKNESS_ASYMMETRIC;
+			break;
+		}
+		case LS_MODIFIER_CREASE_ANGLE:
+		{
+			LineStyleThicknessModifier_CreaseAngle *p = (LineStyleThicknessModifier_CreaseAngle *)m;
+			p->curve = curvemapping_add(1, 0.0f, 0.0f, 1.0f, 1.0f);
+			p->min_angle = 0.0f;
+			p->max_angle = DEG2RADF(180.0f);
+			p->min_thickness = 1.0f;
+			p->max_thickness = 10.0f;
+			break;
+		}
+		case LS_MODIFIER_CURVATURE_3D:
+		{
+			LineStyleThicknessModifier_Curvature_3D *p = (LineStyleThicknessModifier_Curvature_3D *)m;
+			p->curve = curvemapping_add(1, 0.0f, 0.0f, 1.0f, 1.0f);
+			p->min_curvature = 0.0f;
+			p->max_curvature = 0.5f;
+			p->min_thickness = 1.0f;
+			p->max_thickness = 10.0f;
+			break;
+		}
 		default:
 			return NULL; /* unknown modifier type */
 	}
@@ -699,6 +925,50 @@ LineStyleModifier *BKE_linestyle_thickness_modifier_copy(FreestyleLineStyle *lin
 			q->orientation = p->orientation;
 			break;
 		}
+		case LS_MODIFIER_TANGENT:
+		{
+			LineStyleThicknessModifier_Tangent *p = (LineStyleThicknessModifier_Tangent *)m;
+			LineStyleThicknessModifier_Tangent *q = (LineStyleThicknessModifier_Tangent *)new_m;
+			q->curve = curvemapping_copy(p->curve);
+			q->flags = p->flags;
+			q->min_thickness = p->min_thickness;
+			q->max_thickness = p->max_thickness;
+			break;
+		}
+		case LS_MODIFIER_NOISE:
+		{
+			LineStyleThicknessModifier_Noise *p = (LineStyleThicknessModifier_Noise *)m;
+			LineStyleThicknessModifier_Noise *q = (LineStyleThicknessModifier_Noise *)new_m;
+			q->amplitude = p->amplitude;
+			q->period = p->period;
+			q->seed = p->seed;
+			q->flags = p->flags;
+			break;
+		}
+		case LS_MODIFIER_CURVATURE_3D:
+		{
+			LineStyleThicknessModifier_Curvature_3D *p = (LineStyleThicknessModifier_Curvature_3D *)m;
+			LineStyleThicknessModifier_Curvature_3D *q = (LineStyleThicknessModifier_Curvature_3D *)new_m;
+			q->curve = curvemapping_copy(p->curve);
+			q->flags = p->flags;
+			q->min_curvature = p->min_curvature;
+			q->max_curvature = p->max_curvature;
+			q->min_thickness = p->min_thickness;
+			q->max_thickness = p->max_thickness;
+			break;
+		}
+		case LS_MODIFIER_CREASE_ANGLE:
+		{
+			LineStyleThicknessModifier_CreaseAngle *p = (LineStyleThicknessModifier_CreaseAngle *)m;
+			LineStyleThicknessModifier_CreaseAngle *q = (LineStyleThicknessModifier_CreaseAngle *)new_m;
+			q->curve = curvemapping_copy(p->curve);
+			q->flags = p->flags;
+			q->min_angle = p->min_angle;
+			q->max_angle = p->max_angle;
+			q->min_thickness = p->min_thickness;
+			q->max_thickness = p->max_thickness;
+			break;
+		}
 		default:
 			return NULL; /* unknown modifier type */
 	}
@@ -726,6 +996,15 @@ int BKE_linestyle_thickness_modifier_remove(FreestyleLineStyle *linestyle, LineS
 			break;
 		case LS_MODIFIER_CALLIGRAPHY:
 			break;
+		case LS_MODIFIER_TANGENT:
+			curvemapping_free(((LineStyleThicknessModifier_Tangent *)m)->curve);
+			break;
+		case LS_MODIFIER_NOISE:
+			break;
+		case LS_MODIFIER_CREASE_ANGLE:
+			break;
+		case LS_MODIFIER_CURVATURE_3D:
+			break;
 	}
 	BLI_freelinkN(&linestyle->thickness_modifiers, m);
 	return 0;
@@ -775,6 +1054,9 @@ static LineStyleModifier *alloc_geometry_modifier(const char *name, int type)
 		case LS_MODIFIER_2D_TRANSFORM:
 			size = sizeof(LineStyleGeometryModifier_2DTransform);
 			break;
+		case LS_MODIFIER_SIMPLIFICATION:
+			size = sizeof(LineStyleGeometryModifier_Simplification);
+			break;
 		default:
 			return NULL; /* unknown modifier type */
 	}
@@ -892,6 +1174,12 @@ LineStyleModifier *BKE_linestyle_geometry_modifier_add(FreestyleLineStyle *lines
 			p->pivot_y = 0.0f;
 			break;
 		}
+	case LS_MODIFIER_SIMPLIFICATION:
+	{
+		LineStyleGeometryModifier_Simplification *p = (LineStyleGeometryModifier_Simplification *)m;
+		p->tolerance = 0.1f;
+		break;
+	}
 		default:
 			return NULL; /* unknown modifier type */
 	}
@@ -1026,6 +1314,13 @@ LineStyleModifier *BKE_linestyle_geometry_modifier_copy(FreestyleLineStyle *line
 			q->pivot_y = p->pivot_y;
 			break;
 		}
+		case LS_MODIFIER_SIMPLIFICATION:
+		{
+			LineStyleGeometryModifier_Simplification *p = (LineStyleGeometryModifier_Simplification *)m;
+			LineStyleGeometryModifier_Simplification *q = (LineStyleGeometryModifier_Simplification *)new_m;
+			q->tolerance = p->tolerance;
+			break;
+		}
 		default:
 			return NULL; /* unknown modifier type */
 	}
@@ -1125,6 +1420,22 @@ char *BKE_linestyle_path_to_color_ramp(FreestyleLineStyle *linestyle, ColorBand
 				if (color_ramp == ((LineStyleColorModifier_Material *)m)->color_ramp)
 					found = true;
 				break;
+			case LS_MODIFIER_TANGENT:
+				if (color_ramp == ((LineStyleColorModifier_Tangent *)m)->color_ramp)
+					found = true;
+				break;
+			case LS_MODIFIER_NOISE:
+				if (color_ramp == ((LineStyleColorModifier_Noise *)m)->color_ramp)
+					found = true;
+				break;
+			case LS_MODIFIER_CREASE_ANGLE:
+				if (color_ramp == ((LineStyleColorModifier_CreaseAngle*)m)->color_ramp)
+					found = true;
+				break;
+			case LS_MODIFIER_CURVATURE_3D:
+				if (color_ramp == ((LineStyleColorModifier_Curvature_3D *)m)->color_ramp)
+					found = true;
+				break;
 		}
 
 		if (found) {

source/blender/blenloader/intern/readfile.c

@@ -7371,6 +7371,30 @@ static void direct_link_linestyle_color_modifier(FileData *fd, LineStyleModifier
 			m->color_ramp = newdataadr(fd, m->color_ramp);
 		}
 		break;
+	case LS_MODIFIER_TANGENT:
+		{
+			LineStyleColorModifier_Tangent *m = (LineStyleColorModifier_Tangent *)modifier;
+			m->color_ramp = newdataadr(fd, m->color_ramp);
+		}
+		break;
+	case LS_MODIFIER_NOISE:
+		{
+			LineStyleColorModifier_Noise *m = (LineStyleColorModifier_Noise *)modifier;
+			m->color_ramp = newdataadr(fd, m->color_ramp);
+		}
+		break;
+	case LS_MODIFIER_CREASE_ANGLE:
+		{
+			LineStyleColorModifier_CreaseAngle *m = (LineStyleColorModifier_CreaseAngle *)modifier;
+			m->color_ramp = newdataadr(fd, m->color_ramp);
+		}
+		break;
+	case LS_MODIFIER_CURVATURE_3D:
+		{
+			LineStyleColorModifier_Curvature_3D *m = (LineStyleColorModifier_Curvature_3D *)modifier;
+			m->color_ramp = newdataadr(fd, m->color_ramp);
+		}
+		break;
 	}
 }
 
@@ -7405,6 +7429,34 @@ static void direct_link_linestyle_alpha_modifier(FileData *fd, LineStyleModifier
 			direct_link_curvemapping(fd, m->curve);
 		}
 		break;
+	case LS_MODIFIER_TANGENT:
+		{
+			LineStyleAlphaModifier_Tangent *m = (LineStyleAlphaModifier_Tangent *)modifier;
+			m->curve = newdataadr(fd, m->curve);
+			direct_link_curvemapping(fd, m->curve);
+		}
+		break;
+	case LS_MODIFIER_NOISE:
+		{
+			LineStyleAlphaModifier_Noise *m = (LineStyleAlphaModifier_Noise *)modifier;
+			m->curve = newdataadr(fd, m->curve);
+			direct_link_curvemapping(fd, m->curve);
+		}
+		break;
+	case LS_MODIFIER_CREASE_ANGLE:
+		{
+			LineStyleAlphaModifier_CreaseAngle *m = (LineStyleAlphaModifier_CreaseAngle *)modifier;
+			m->curve = newdataadr(fd, m->curve);
+			direct_link_curvemapping(fd, m->curve);
+		}
+		break;
+	case LS_MODIFIER_CURVATURE_3D:
+		{
+			LineStyleAlphaModifier_Curvature_3D *m = (LineStyleAlphaModifier_Curvature_3D *)modifier;
+			m->curve = newdataadr(fd, m->curve);
+			direct_link_curvemapping(fd, m->curve);
+		}
+		break;
 	}
 }
 
@@ -7439,6 +7491,27 @@ static void direct_link_linestyle_thickness_modifier(FileData *fd, LineStyleModi
 			direct_link_curvemapping(fd, m->curve);
 		}
 		break;
+	case LS_MODIFIER_TANGENT:
+		{
+			LineStyleThicknessModifier_Tangent *m = (LineStyleThicknessModifier_Tangent *)modifier;
+			m->curve = newdataadr(fd, m->curve);
+			direct_link_curvemapping(fd, m->curve);
+		}
+		break;
+	case LS_MODIFIER_CREASE_ANGLE:
+		{
+			LineStyleThicknessModifier_CreaseAngle *m = (LineStyleThicknessModifier_CreaseAngle *)modifier;
+			m->curve = newdataadr(fd, m->curve);
+			direct_link_curvemapping(fd, m->curve);
+		}
+		break;
+	case LS_MODIFIER_CURVATURE_3D:
+		{
+			LineStyleThicknessModifier_Curvature_3D *m = (LineStyleThicknessModifier_Curvature_3D *)modifier;
+			m->curve = newdataadr(fd, m->curve);
+			direct_link_curvemapping(fd, m->curve);
+		}
+		break;
 	}
 }
 

source/blender/blenloader/intern/writefile.c

@@ -3354,6 +3354,18 @@ static void write_linestyle_color_modifiers(WriteData *wd, ListBase *modifiers)
 		case LS_MODIFIER_MATERIAL:
 			struct_name = "LineStyleColorModifier_Material";
 			break;
+		case LS_MODIFIER_TANGENT:
+			struct_name = "LineStyleColorModifier_Tangent";
+			break;
+		case LS_MODIFIER_NOISE:
+			struct_name = "LineStyleColorModifier_Noise";
+			break;
+		case LS_MODIFIER_CREASE_ANGLE:
+			struct_name = "LineStyleColorModifier_CreaseAngle";
+			break;
+		case LS_MODIFIER_CURVATURE_3D:
+			struct_name = "LineStyleColorModifier_Curvature_3D";
+			break;
 		default:
 			struct_name = "LineStyleColorModifier"; /* this should not happen */
 		}
@@ -3373,6 +3385,18 @@ static void write_linestyle_color_modifiers(WriteData *wd, ListBase *modifiers)
 		case LS_MODIFIER_MATERIAL:
 			writestruct(wd, DATA, "ColorBand", 1, ((LineStyleColorModifier_Material *)m)->color_ramp);
 			break;
+		case LS_MODIFIER_TANGENT:
+			writestruct(wd, DATA, "ColorBand", 1, ((LineStyleColorModifier_Tangent *)m)->color_ramp);
+			break;
+		case LS_MODIFIER_NOISE:
+			writestruct(wd, DATA, "ColorBand", 1, ((LineStyleColorModifier_Noise *)m)->color_ramp);
+			break;
+		case LS_MODIFIER_CREASE_ANGLE:
+			writestruct(wd, DATA, "ColorBand", 1, ((LineStyleColorModifier_CreaseAngle *)m)->color_ramp);
+			break;
+		case LS_MODIFIER_CURVATURE_3D:
+			writestruct(wd, DATA, "ColorBand", 1, ((LineStyleColorModifier_Curvature_3D *)m)->color_ramp);
+			break;
 		}
 	}
 }
@@ -3396,6 +3420,18 @@ static void write_linestyle_alpha_modifiers(WriteData *wd, ListBase *modifiers)
 		case LS_MODIFIER_MATERIAL:
 			struct_name = "LineStyleAlphaModifier_Material";
 			break;
+		case LS_MODIFIER_TANGENT:
+			struct_name = "LineStyleAlphaModifier_Tangent";
+			break;
+		case LS_MODIFIER_NOISE:
+			struct_name = "LineStyleAlphaModifier_Noise";
+			break;
+		case LS_MODIFIER_CREASE_ANGLE:
+			struct_name = "LineStyleAlphaModifier_CreaseAngle";
+			break;
+		case LS_MODIFIER_CURVATURE_3D:
+			struct_name = "LineStyleAlphaModifier_Curvature_3D";
+			break;
 		default:
 			struct_name = "LineStyleAlphaModifier"; /* this should not happen */
 		}
@@ -3415,6 +3451,18 @@ static void write_linestyle_alpha_modifiers(WriteData *wd, ListBase *modifiers)
 		case LS_MODIFIER_MATERIAL:
 			write_curvemapping(wd, ((LineStyleAlphaModifier_Material *)m)->curve);
 			break;
+		case LS_MODIFIER_TANGENT:
+			write_curvemapping(wd, ((LineStyleAlphaModifier_Tangent *)m)->curve);
+			break;
+		case LS_MODIFIER_NOISE:
+			write_curvemapping(wd, ((LineStyleAlphaModifier_Noise *)m)->curve);
+			break;
+		case LS_MODIFIER_CREASE_ANGLE:
+			write_curvemapping(wd, ((LineStyleAlphaModifier_CreaseAngle *)m)->curve);
+			break;
+		case LS_MODIFIER_CURVATURE_3D:
+			write_curvemapping(wd, ((LineStyleAlphaModifier_Curvature_3D *)m)->curve);
+			break;
 		}
 	}
 }
@@ -3441,6 +3489,18 @@ static void write_linestyle_thickness_modifiers(WriteData *wd, ListBase *modifie
 		case LS_MODIFIER_CALLIGRAPHY:
 			struct_name = "LineStyleThicknessModifier_Calligraphy";
 			break;
+		case LS_MODIFIER_TANGENT:
+			struct_name = "LineStyleThicknessModifier_Tangent";
+			break;
+		case LS_MODIFIER_NOISE:
+			struct_name = "LineStyleThicknessModifier_Noise";
+			break;
+		case LS_MODIFIER_CREASE_ANGLE:
+			struct_name = "LineStyleThicknessModifier_CreaseAngle";
+			break;
+		case LS_MODIFIER_CURVATURE_3D:
+			struct_name = "LineStyleThicknessModifier_Curvature_3D";
+			break;
 		default:
 			struct_name = "LineStyleThicknessModifier"; /* this should not happen */
 		}
@@ -3460,6 +3520,15 @@ static void write_linestyle_thickness_modifiers(WriteData *wd, ListBase *modifie
 		case LS_MODIFIER_MATERIAL:
 			write_curvemapping(wd, ((LineStyleThicknessModifier_Material *)m)->curve);
 			break;
+		case LS_MODIFIER_TANGENT:
+			write_curvemapping(wd, ((LineStyleThicknessModifier_Tangent *)m)->curve);
+			break;
+		case LS_MODIFIER_CREASE_ANGLE:
+			write_curvemapping(wd, ((LineStyleThicknessModifier_CreaseAngle *)m)->curve);
+			break;
+		case LS_MODIFIER_CURVATURE_3D:
+			write_curvemapping(wd, ((LineStyleThicknessModifier_Curvature_3D *)m)->curve);
+			break;
 		}
 	}
 }
@@ -3510,6 +3579,9 @@ static void write_linestyle_geometry_modifiers(WriteData *wd, ListBase *modifier
 		case LS_MODIFIER_2D_TRANSFORM:
 			struct_name = "LineStyleGeometryModifier_2DTransform";
 			break;
+		case LS_MODIFIER_SIMPLIFICATION:
+			struct_name = "LineStyleGeometryModifier_Simplification";
+			break;
 		default:
 			struct_name = "LineStyleGeometryModifier"; /* this should not happen */
 		}

source/blender/freestyle/intern/python/BPy_FrsNoise.cpp

@@ -25,6 +25,8 @@
 #include "BPy_FrsNoise.h"
 #include "BPy_Convert.h"
 
+#include "../system/RandGen.h"
+
 #include <sstream>
 
 #ifdef __cplusplus
@@ -69,12 +71,14 @@ static int FrsNoise_init(BPy_FrsNoise *self, PyObject *args, PyObject *kwds)
 	if (!PyArg_ParseTupleAndKeywords(args, kwds, "|l", (char **)kwlist, &seed))
 		return -1;
 	self->n = new Noise(seed);
+	self->pn = new PseudoNoise();
 	return 0;
 }
 
 static void FrsNoise_dealloc(BPy_FrsNoise *self)
 {
 	delete self->n;
+	delete self->pn;
 	Py_TYPE(self)->tp_free((PyObject *)self);
 }
 
@@ -99,6 +103,32 @@ PyDoc_STRVAR(FrsNoise_turbulence1_doc,
 "   :return: A noise value.\n"
 "   :rtype: float");
 
+static PyObject *FrsNoise_drand(BPy_FrsNoise *self, PyObject *args, PyObject *kwds)
+{
+	static const char *kwlist[] = {"seed", NULL};
+	long seed = 0;
+	if (!PyArg_ParseTupleAndKeywords(args, kwds, "|I", (char **)kwlist, &seed)) {
+		PyErr_SetString(PyExc_TypeError, "optional argument 1 must be of type int");
+		return NULL;
+	}
+	if (seed){
+		RandGen::srand48(seed);
+	}
+	return PyFloat_FromDouble(RandGen::drand48());
+}
+
+static PyObject *FrsNoise_turbulence_smooth(BPy_FrsNoise *self, PyObject *args, PyObject *kwds)
+{
+	static const char *kwlist[] = {"v", "oct", NULL};
+
+	double x;  // note: this has to be a double (not float)
+	unsigned nbOctaves = 8;
+
+	if (!PyArg_ParseTupleAndKeywords(args, kwds, "d|I", (char **)kwlist, &x, &nbOctaves))
+		return NULL;
+	return PyFloat_FromDouble(self->pn->turbulenceSmooth(x, nbOctaves));
+}
+
 static PyObject *FrsNoise_turbulence1(BPy_FrsNoise *self, PyObject *args, PyObject *kwds)
 {
 	static const char *kwlist[] = {"v", "freq", "amp", "oct", NULL};
@@ -257,6 +287,8 @@ static PyMethodDef BPy_FrsNoise_methods[] = {
 	{"smoothNoise1", (PyCFunction)FrsNoise_smoothNoise1, METH_VARARGS | METH_KEYWORDS, FrsNoise_smoothNoise1_doc},
 	{"smoothNoise2", (PyCFunction)FrsNoise_smoothNoise2, METH_VARARGS | METH_KEYWORDS, FrsNoise_smoothNoise2_doc},
 	{"smoothNoise3", (PyCFunction)FrsNoise_smoothNoise3, METH_VARARGS | METH_KEYWORDS, FrsNoise_smoothNoise3_doc},
+	{"rand", (PyCFunction)FrsNoise_drand, METH_VARARGS | METH_KEYWORDS, NULL},
+	{"turbulence_smooth", (PyCFunction)FrsNoise_turbulence_smooth, METH_VARARGS | METH_KEYWORDS, NULL},
 	{NULL, NULL, 0, NULL}
 };
 

source/blender/freestyle/intern/python/BPy_FrsNoise.h

@@ -30,6 +30,7 @@ extern "C" {
 }
 
 #include "../geometry/Noise.h"
+#include "../system/PseudoNoise.h"
 
 using namespace Freestyle;
 
@@ -47,6 +48,7 @@ extern PyTypeObject FrsNoise_Type;
 typedef struct {
 	PyObject_HEAD
 	Noise *n;
+	PseudoNoise *pn;
 } BPy_FrsNoise;
 
 /*---------------------------Python BPy_FrsNoise visible prototypes-----------*/

source/blender/freestyle/intern/stroke/BasicStrokeShaders.cpp

@@ -185,7 +185,7 @@ int ThicknessNoiseShader::shade(Stroke& stroke) const
 	real bruit, bruit2;
 	PseudoNoise mynoise, mynoise2;
 	for (vend = stroke.strokeVerticesEnd(); v != vend; ++v) {
-		bruit = mynoise.turbulenceSmooth(_scale * v->curvilinearAbscissa() + initU1, 2); // 2 : nbOctaves
+		bruit =   mynoise.turbulenceSmooth(_scale * v->curvilinearAbscissa() + initU1, 2); // 2 : nbOctaves
 		bruit2 = mynoise2.turbulenceSmooth(_scale * v->curvilinearAbscissa() + initU2, 2); // 2 : nbOctaves
 		const float *originalThickness = v->attribute().getThickness();
 		float r = bruit * _amplitude + originalThickness[0];

source/blender/makesdna/DNA_linestyle_types.h

@@ -79,7 +79,12 @@ typedef struct LineStyleModifier {
 #define LS_MODIFIER_BLUEPRINT              16
 #define LS_MODIFIER_2D_OFFSET              17
 #define LS_MODIFIER_2D_TRANSFORM           18
-#define LS_MODIFIER_NUM                    19
+#define LS_MODIFIER_TANGENT                19
+#define LS_MODIFIER_NOISE                  20
+#define LS_MODIFIER_CREASE_ANGLE           21
+#define LS_MODIFIER_SIMPLIFICATION         22
+#define LS_MODIFIER_CURVATURE_3D           23
+#define LS_MODIFIER_NUM                    24
 
 /* LineStyleModifier::flags */
 #define LS_MODIFIER_ENABLED     1
@@ -92,6 +97,9 @@ typedef struct LineStyleModifier {
 #define LS_MODIFIER_USE_CURVE    1
 #define LS_MODIFIER_INVERT       2
 
+/* flags (for asymmetric thickness application) */
+#define LS_THICKNESS_ASYMMETRIC   1
+
 /* blend (for alpha & thickness) */
 #define LS_VALUE_BLEND  0
 #define LS_VALUE_ADD    1
@@ -186,6 +194,117 @@ typedef struct LineStyleThicknessModifier_DistanceFromObject {
 	int pad;
 } LineStyleThicknessModifier_DistanceFromObject;
 
+/* 3D curvature modifiers */
+
+typedef struct LineStyleColorModifier_Curvature_3D {
+	struct LineStyleModifier modifier;
+
+	float min_curvature, max_curvature;
+
+	struct ColorBand *color_ramp;
+	float range_min, range_max;
+}LineStyleColorModifier_Curvature_3D;
+
+typedef struct LineStyleAlphaModifier_Curvature_3D {
+	struct LineStyleModifier modifier;
+
+	struct CurveMapping	*curve;
+	int flags;
+	float min_curvature, max_curvature;
+	int pad;
+}LineStyleAlphaModifier_Curvature_3D;
+
+typedef struct LineStyleThicknessModifier_Curvature_3D {
+	struct LineStyleModifier modifier;
+
+	struct CurveMapping *curve;
+	int flags, pad;
+
+	float min_curvature, max_curvature;
+	float min_thickness, max_thickness;
+}LineStyleThicknessModifier_Curvature_3D;
+
+/* Noise modifiers (for color, alpha and thickness) */
+
+typedef struct LineStyleColorModifier_Noise {
+	struct LineStyleModifier modifier;
+
+	struct ColorBand *color_ramp;
+	float period, amplitude;
+	int seed, pad;
+} LineStyleColorModifier_Noise;
+
+typedef struct LineStyleAlphaModifier_Noise {
+	struct LineStyleModifier modifier;
+
+	struct CurveMapping	*curve;
+	int flags;
+	float period, amplitude;
+	int seed;
+} LineStyleAlphaModifier_Noise;
+
+typedef struct LineStyleThicknessModifier_Noise {
+	struct LineStyleModifier modifier;
+
+	float period, amplitude;
+	int flags;
+	int seed;
+
+} LineStyleThicknessModifier_Noise;
+
+/* Crease Angle modifiers */
+
+typedef struct LineStyleColorModifier_CreaseAngle {
+	struct LineStyleModifier modifier;
+
+	struct ColorBand *color_ramp;
+	float min_angle, max_angle;
+} LineStyleColorModifier_CreaseAngle;
+
+typedef struct LineStyleAlphaModifier_CreaseAngle {
+	struct LineStyleModifier modifier;
+
+	struct CurveMapping	*curve;
+	int flags;
+	float min_angle, max_angle;
+	int pad;
+} LineStyleAlphaModifier_CreaseAngle;
+
+typedef struct LineStyleThicknessModifier_CreaseAngle {
+	struct LineStyleModifier modifier;
+
+	struct CurveMapping *curve;
+	int flags, pad;
+
+	float min_angle, max_angle;
+	float min_thickness, max_thickness;
+} LineStyleThicknessModifier_CreaseAngle;
+
+/* Tangent modifiers */
+
+typedef struct LineStyleColorModifier_Tangent {
+	struct LineStyleModifier modifier;
+
+	struct ColorBand *color_ramp;
+} LineStyleColorModifier_Tangent;
+
+typedef struct LineStyleAlphaModifier_Tangent {
+	struct LineStyleModifier modifier;
+
+	struct CurveMapping	*curve;
+	int flags;
+	int pad;
+} LineStyleAlphaModifier_Tangent;
+
+typedef struct LineStyleThicknessModifier_Tangent {
+	struct LineStyleModifier modifier;
+
+	struct CurveMapping	*curve;
+	int flags;
+	float min_thickness, max_thickness;
+	int pad;
+} LineStyleThicknessModifier_Tangent;
+
 /* Material modifiers */
 
 /* mat_attr */
@@ -354,6 +473,13 @@ typedef struct LineStyleGeometryModifier_2DTransform {
 	int pad;
 } LineStyleGeometryModifier_2DTransform;
 
+typedef struct LineStyleGeometryModifier_Simplification {
+	struct LineStyleModifier modifier;
+
+	float tolerance;
+	int pad;
+}LineStyleGeometryModifier_Simplification;
+
 /* Calligraphic thickness modifier */
 
 typedef struct LineStyleThicknessModifier_Calligraphy {

source/blender/makesrna/RNA_access.h

@@ -316,14 +316,22 @@ extern StructRNA RNA_LimitRotationConstraint;
 extern StructRNA RNA_LimitScaleConstraint;
 extern StructRNA RNA_LineStyleAlphaModifier;
 extern StructRNA RNA_LineStyleAlphaModifier_AlongStroke;
+extern StructRNA RNA_LineStyleAlphaModifier_CreaseAngle;
+extern StructRNA RNA_LineStyleAlphaModifier_Curvature_3D;
 extern StructRNA RNA_LineStyleAlphaModifier_DistanceFromCamera;
 extern StructRNA RNA_LineStyleAlphaModifier_DistanceFromObject;
 extern StructRNA RNA_LineStyleAlphaModifier_Material;
+extern StructRNA RNA_LineStyleAlphaModifier_Noise;
+extern StructRNA RNA_LineStyleAlphaModifier_Tangent;
 extern StructRNA RNA_LineStyleColorModifier;
 extern StructRNA RNA_LineStyleColorModifier_AlongStroke;
+extern StructRNA RNA_LineStyleColorModifier_CreaseAngle;
+extern StructRNA RNA_LineStyleColorModifier_Curvature_3D;
 extern StructRNA RNA_LineStyleColorModifier_DistanceFromCamera;
 extern StructRNA RNA_LineStyleColorModifier_DistanceFromObject;
 extern StructRNA RNA_LineStyleColorModifier_Material;
+extern StructRNA RNA_LineStyleColorModifier_Noise;
+extern StructRNA RNA_LineStyleColorModifier_Tangent;
 extern StructRNA RNA_LineStyleGeometryModifier;
 extern StructRNA RNA_LineStyleGeometryModifier_2DOffset;
 extern StructRNA RNA_LineStyleGeometryModifier_2DTransform;
@@ -335,6 +343,7 @@ extern StructRNA RNA_LineStyleGeometryModifier_PerlinNoise1D;
 extern StructRNA RNA_LineStyleGeometryModifier_PerlinNoise2D;
 extern StructRNA RNA_LineStyleGeometryModifier_Polygonalization;
 extern StructRNA RNA_LineStyleGeometryModifier_Sampling;
+extern StructRNA RNA_LineStyleGeometryModifier_Simplification;
 extern StructRNA RNA_LineStyleGeometryModifier_SinusDisplacement;
 extern StructRNA RNA_LineStyleGeometryModifier_SpatialNoise;
 extern StructRNA RNA_LineStyleGeometryModifier_TipRemover;
@@ -343,9 +352,13 @@ extern StructRNA RNA_LineStyleTextureSlot;
 extern StructRNA RNA_LineStyleThicknessModifier;
 extern StructRNA RNA_LineStyleThicknessModifier_AlongStroke;
 extern StructRNA RNA_LineStyleThicknessModifier_Calligraphy;
+extern StructRNA RNA_LineStyleThicknessModifier_CreaseAngle;
+extern StructRNA RNA_LineStyleThicknessModifier_Curvature_3D;
 extern StructRNA RNA_LineStyleThicknessModifier_DistanceFromCamera;
 extern StructRNA RNA_LineStyleThicknessModifier_DistanceFromObject;
 extern StructRNA RNA_LineStyleThicknessModifier_Material;
+extern StructRNA RNA_LineStyleThicknessModifier_Noise;
+extern StructRNA RNA_LineStyleThicknessModifier_Tangent;
 extern StructRNA RNA_LockedTrackConstraint;
 extern StructRNA RNA_Macro;
 extern StructRNA RNA_MagicTexture;

source/blender/makesrna/intern/rna_linestyle.c

@@ -41,26 +41,38 @@
 
 EnumPropertyItem linestyle_color_modifier_type_items[] = {
 	{LS_MODIFIER_ALONG_STROKE, "ALONG_STROKE", ICON_MODIFIER, "Along Stroke", ""},
+	{LS_MODIFIER_CREASE_ANGLE, "CREASE_ANGLE", ICON_MODIFIER, "Crease Angle", ""},
+	{LS_MODIFIER_CURVATURE_3D, "CURVATURE_3D", ICON_MODIFIER, "Curvature 3D", ""},
 	{LS_MODIFIER_DISTANCE_FROM_CAMERA, "DISTANCE_FROM_CAMERA", ICON_MODIFIER, "Distance from Camera", ""},
 	{LS_MODIFIER_DISTANCE_FROM_OBJECT, "DISTANCE_FROM_OBJECT", ICON_MODIFIER, "Distance from Object", ""},
 	{LS_MODIFIER_MATERIAL, "MATERIAL", ICON_MODIFIER, "Material", ""},
+	{LS_MODIFIER_NOISE, "NOISE", ICON_MODIFIER, "Noise", ""},
+	{LS_MODIFIER_TANGENT, "TANGENT", ICON_MODIFIER, "Tangent", ""},
 	{0, NULL, 0, NULL, NULL}
 };
 
 EnumPropertyItem linestyle_alpha_modifier_type_items[] = {
 	{LS_MODIFIER_ALONG_STROKE, "ALONG_STROKE", ICON_MODIFIER, "Along Stroke", ""},
+	{LS_MODIFIER_CREASE_ANGLE, "CREASE_ANGLE", ICON_MODIFIER, "Crease Angle", ""},
+	{LS_MODIFIER_CURVATURE_3D, "CURVATURE_3D", ICON_MODIFIER, "Curvature 3D", ""},
 	{LS_MODIFIER_DISTANCE_FROM_CAMERA, "DISTANCE_FROM_CAMERA", ICON_MODIFIER, "Distance from Camera", ""},
 	{LS_MODIFIER_DISTANCE_FROM_OBJECT, "DISTANCE_FROM_OBJECT", ICON_MODIFIER, "Distance from Object", ""},
 	{LS_MODIFIER_MATERIAL, "MATERIAL", ICON_MODIFIER, "Material", ""},
+	{LS_MODIFIER_NOISE, "NOISE", ICON_MODIFIER, "Noise", ""},
+	{LS_MODIFIER_TANGENT, "TANGENT", ICON_MODIFIER, "Tangent", ""},
 	{0, NULL, 0, NULL, NULL}
 };
 
 EnumPropertyItem linestyle_thickness_modifier_type_items[] = {
 	{LS_MODIFIER_ALONG_STROKE, "ALONG_STROKE", ICON_MODIFIER, "Along Stroke", ""},
 	{LS_MODIFIER_CALLIGRAPHY, "CALLIGRAPHY", ICON_MODIFIER, "Calligraphy", ""},
+	{LS_MODIFIER_CREASE_ANGLE, "CREASE_ANGLE", ICON_MODIFIER, "Crease Angle", ""},
+	{LS_MODIFIER_CURVATURE_3D, "CURVATURE_3D", ICON_MODIFIER, "Curvature 3D", ""},
 	{LS_MODIFIER_DISTANCE_FROM_CAMERA, "DISTANCE_FROM_CAMERA", ICON_MODIFIER, "Distance from Camera", ""},
 	{LS_MODIFIER_DISTANCE_FROM_OBJECT, "DISTANCE_FROM_OBJECT", ICON_MODIFIER, "Distance from Object", ""},
 	{LS_MODIFIER_MATERIAL, "MATERIAL", ICON_MODIFIER, "Material", ""},
+	{LS_MODIFIER_NOISE, "NOISE", ICON_MODIFIER, "Noise", ""},
+	{LS_MODIFIER_TANGENT, "TANGENT", ICON_MODIFIER, "Tangent", ""},
 	{0, NULL, 0, NULL, NULL}
 };
 
@@ -75,6 +87,7 @@ EnumPropertyItem linestyle_geometry_modifier_type_items[] = {
 	{LS_MODIFIER_PERLIN_NOISE_2D, "PERLIN_NOISE_2D", ICON_MODIFIER, "Perlin Noise 2D", ""},
 	{LS_MODIFIER_POLYGONIZATION, "POLYGONIZATION", ICON_MODIFIER, "Polygonization", ""},
 	{LS_MODIFIER_SAMPLING, "SAMPLING", ICON_MODIFIER, "Sampling", ""},
+	{LS_MODIFIER_SIMPLIFICATION, "SIMPLIFICATION", ICON_MODIFIER, "Simplification", ""},
 	{LS_MODIFIER_SINUS_DISPLACEMENT, "SINUS_DISPLACEMENT", ICON_MODIFIER, "Sinus Displacement", ""},
 	{LS_MODIFIER_SPATIAL_NOISE, "SPATIAL_NOISE", ICON_MODIFIER, "Spatial Noise", ""},
 	{LS_MODIFIER_TIP_REMOVER, "TIP_REMOVER", ICON_MODIFIER, "Tip Remover", ""},
@@ -104,6 +117,14 @@ static StructRNA *rna_LineStyle_color_modifier_refine(struct PointerRNA *ptr)
 			return &RNA_LineStyleColorModifier_DistanceFromObject;
 		case LS_MODIFIER_MATERIAL:
 			return &RNA_LineStyleColorModifier_Material;
+		case LS_MODIFIER_TANGENT:
+			return &RNA_LineStyleColorModifier_Tangent;
+		case LS_MODIFIER_NOISE:
+			return &RNA_LineStyleColorModifier_Noise;
+		case LS_MODIFIER_CREASE_ANGLE:
+			return &RNA_LineStyleColorModifier_CreaseAngle;
+		case LS_MODIFIER_CURVATURE_3D:
+			return &RNA_LineStyleColorModifier_Curvature_3D;
 		default:
 			return &RNA_LineStyleColorModifier;
 	}
@@ -122,6 +143,14 @@ static StructRNA *rna_LineStyle_alpha_modifier_refine(struct PointerRNA *ptr)
 			return &RNA_LineStyleAlphaModifier_DistanceFromObject;
 		case LS_MODIFIER_MATERIAL:
 			return &RNA_LineStyleAlphaModifier_Material;
+		case LS_MODIFIER_TANGENT:
+			return &RNA_LineStyleAlphaModifier_Tangent;
+		case LS_MODIFIER_NOISE:
+			return &RNA_LineStyleAlphaModifier_Noise;
+		case LS_MODIFIER_CREASE_ANGLE:
+			return &RNA_LineStyleAlphaModifier_CreaseAngle;
+		case LS_MODIFIER_CURVATURE_3D:
+			return &RNA_LineStyleAlphaModifier_Curvature_3D;
 		default:
 			return &RNA_LineStyleAlphaModifier;
 	}
@@ -142,6 +171,14 @@ static StructRNA *rna_LineStyle_thickness_modifier_refine(struct PointerRNA *ptr
 			return &RNA_LineStyleThicknessModifier_Material;
 		case LS_MODIFIER_CALLIGRAPHY:
 			return &RNA_LineStyleThicknessModifier_Calligraphy;
+		case LS_MODIFIER_TANGENT:
+			return &RNA_LineStyleThicknessModifier_Tangent;
+		case LS_MODIFIER_NOISE:
+			return &RNA_LineStyleThicknessModifier_Noise;
+		case LS_MODIFIER_CREASE_ANGLE:
+			return &RNA_LineStyleThicknessModifier_CreaseAngle;
+		case LS_MODIFIER_CURVATURE_3D:
+			return &RNA_LineStyleThicknessModifier_Curvature_3D;
 		default:
 			return &RNA_LineStyleThicknessModifier;
 	}
@@ -178,6 +215,8 @@ static StructRNA *rna_LineStyle_geometry_modifier_refine(struct PointerRNA *ptr)
 			return &RNA_LineStyleGeometryModifier_2DOffset;
 		case LS_MODIFIER_2D_TRANSFORM:
 			return &RNA_LineStyleGeometryModifier_2DTransform;
+		case LS_MODIFIER_SIMPLIFICATION:
+			return &RNA_LineStyleGeometryModifier_Simplification;
 		default:
 			return &RNA_LineStyleGeometryModifier;
 	}
@@ -785,6 +824,62 @@ static void rna_def_linestyle_modifiers(BlenderRNA *brna)
 	RNA_def_property_ui_text(prop, "Ramp", "Use color ramp to map the BW average into an RGB color");
 	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
 
+	srna = RNA_def_struct(brna, "LineStyleColorModifier_Tangent", "LineStyleColorModifier");
+	RNA_def_struct_ui_text(srna, "Tangent", "Change line color based on the direction of a stroke");
+	rna_def_color_modifier(srna);
+	rna_def_modifier_color_ramp_common(srna, false);
+
+	srna = RNA_def_struct(brna, "LineStyleColorModifier_Noise", "LineStyleColorModifier");
+	RNA_def_struct_ui_text(srna, "Noise", "Change line color based on random noise");
+	rna_def_color_modifier(srna);
+	rna_def_modifier_color_ramp_common(srna, false);
+
+	prop = RNA_def_property(srna, "amplitude", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "amplitude");
+	RNA_def_property_ui_text(prop, "Amplitude", "Amplitude of the noise");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "period", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "period");
+	RNA_def_property_ui_text(prop, "Period", "Period of the noise");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "seed", PROP_INT, PROP_NONE);
+	RNA_def_property_int_sdna(prop, NULL, "seed");
+	RNA_def_property_ui_text(prop, "Seed", "Seed for the noise generation");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	srna = RNA_def_struct(brna, "LineStyleColorModifier_CreaseAngle", "LineStyleColorModifier");
+	RNA_def_struct_ui_text(srna, "Crease Angle", "Change line color based on the underlying crease angle");
+	rna_def_color_modifier(srna);
+	rna_def_modifier_color_ramp_common(srna, false);
+
+	prop = RNA_def_property(srna, "angle_min", PROP_FLOAT, PROP_ANGLE);
+	RNA_def_property_float_sdna(prop, NULL, "min_angle");
+	RNA_def_property_ui_text(prop, "Min Angle", "Minimum angle to modify thickness");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "angle_max", PROP_FLOAT, PROP_ANGLE);
+	RNA_def_property_float_sdna(prop, NULL, "max_angle");
+	RNA_def_property_ui_text(prop, "Max Angle", "Maximum angle to modify thickness");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	srna = RNA_def_struct(brna, "LineStyleColorModifier_Curvature_3D", "LineStyleColorModifier");
+	RNA_def_struct_ui_text(srna, "Curvature 3D",
+						   "Change line color based on the radial curvature of 3D mesh surfaces");
+	rna_def_color_modifier(srna);
+	rna_def_modifier_color_ramp_common(srna, false);
+
+	prop = RNA_def_property(srna, "curvature_min", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "min_curvature");
+	RNA_def_property_ui_text(prop, "Min Curvature", "Minimum Curvature");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "curvature_max", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "max_curvature");
+	RNA_def_property_ui_text(prop, "Max Curvature", "Maximum Curvature");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
 	/* alpha transparency modifiers */
 
 	srna = RNA_def_struct(brna, "LineStyleAlphaModifier", "LineStyleModifier");
@@ -823,14 +918,90 @@ static void rna_def_linestyle_modifiers(BlenderRNA *brna)
 	rna_def_modifier_material_common(srna);
 	rna_def_modifier_curve_common(srna, false, false);
 
-	/* line thickness modifiers */
+	srna = RNA_def_struct(brna, "LineStyleAlphaModifier_Tangent", "LineStyleAlphaModifier");
+	RNA_def_struct_ui_text(srna, "Tangent", "Alpha transparency based on the direction of the stroke");
+	rna_def_alpha_modifier(srna);
+	rna_def_modifier_curve_common(srna, false, false);
 
+	srna = RNA_def_struct(brna, "LineStyleAlphaModifier_Noise", "LineStyleAlphaModifier");
+	RNA_def_struct_ui_text(srna, "Noise", "Alpha transparency based on random noise");
+	rna_def_alpha_modifier(srna);
+	rna_def_modifier_curve_common(srna, false, false);
+
+	prop = RNA_def_property(srna, "amplitude", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "amplitude");
+	RNA_def_property_ui_text(prop, "Amplitude", "Amplitude of the noise");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "period", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "period");
+	RNA_def_property_ui_text(prop, "Period", "Period of the noise");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "seed", PROP_INT, PROP_NONE);
+	RNA_def_property_int_sdna(prop, NULL, "seed");
+	RNA_def_property_ui_text(prop, "Seed", "Seed for the noise generation");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	srna = RNA_def_struct(brna, "LineStyleAlphaModifier_CreaseAngle", "LineStyleAlphaModifier");
+	RNA_def_struct_ui_text(srna, "Crease Angle",
+						   "Alpha transparency based on the angle between two adjacent faces");
+	rna_def_alpha_modifier(srna);
+	rna_def_modifier_curve_common(srna, false, false);
+
+	prop = RNA_def_property(srna, "angle_min", PROP_FLOAT, PROP_ANGLE);
+	RNA_def_property_float_sdna(prop, NULL, "min_angle");
+	RNA_def_property_ui_text(prop, "Min Angle", "Minimum angle to modify thickness");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "angle_max", PROP_FLOAT, PROP_ANGLE);
+	RNA_def_property_float_sdna(prop, NULL, "max_angle");
+	RNA_def_property_ui_text(prop, "Max Angle", "Maximum angle to modify thickness");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	srna = RNA_def_struct(brna, "LineStyleAlphaModifier_Curvature_3D", "LineStyleAlphaModifier");
+	RNA_def_struct_ui_text(srna, "Curvature 3D",
+						   "Alpha transparency based on the radial curvature of 3D mesh surfaces");
+	rna_def_alpha_modifier(srna);
+	rna_def_modifier_curve_common(srna, false, false);
+
+	prop = RNA_def_property(srna, "curvature_min", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "min_curvature");
+	RNA_def_property_range(prop, 0.0f, 10000.0f);
+	RNA_def_property_ui_text(prop, "Min Curvature", "Minimum Curvature");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "curvature_max", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "max_curvature");
+	RNA_def_property_range(prop, 0.0f, 10000.0f);
+	RNA_def_property_ui_text(prop, "Max Curvature", "Maximum Curvature");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	/* line thickness modifiers */
 	srna = RNA_def_struct(brna, "LineStyleThicknessModifier", "LineStyleModifier");
 	RNA_def_struct_sdna(srna, "LineStyleModifier");
 	RNA_def_struct_refine_func(srna, "rna_LineStyle_thickness_modifier_refine");
 	RNA_def_struct_path_func(srna, "rna_LineStyle_thickness_modifier_path");
 	RNA_def_struct_ui_text(srna, "Line Style Thickness Modifier", "Base type to define line thickness modifiers");
 
+	srna = RNA_def_struct(brna, "LineStyleThicknessModifier_Tangent", "LineStyleThicknessModifier");
+	RNA_def_struct_ui_text(srna, "Tangent", "Thickness based on the direction of the stroke");
+	rna_def_thickness_modifier(srna);
+	rna_def_modifier_curve_common(srna, false, false);
+
+	prop = RNA_def_property(srna, "thickness_min", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "min_thickness");
+	RNA_def_property_range(prop, 0.0f, 10000.0f);
+	RNA_def_property_ui_text(prop, "Min Thickness",
+	                         "Minimum thickness");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "thickness_max", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "max_thickness");
+	RNA_def_property_range(prop, 0.0f, 10000.0f);
+	RNA_def_property_ui_text(prop, "Max Thickness", "Maximum thickness");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
 	srna = RNA_def_struct(brna, "LineStyleThicknessModifier_AlongStroke", "LineStyleThicknessModifier");
 	RNA_def_struct_ui_text(srna, "Along Stroke", "Change line thickness along stroke");
 	rna_def_thickness_modifier(srna);
@@ -882,6 +1053,88 @@ static void rna_def_linestyle_modifiers(BlenderRNA *brna)
 	RNA_def_property_ui_text(prop, "Max Thickness", "Maximum thickness in the main direction");
 	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
 
+	srna = RNA_def_struct(brna, "LineStyleThicknessModifier_Noise", "LineStyleThicknessModifier");
+	RNA_def_struct_ui_text(srna, "Noise", "Line thickness based on random noise");
+	rna_def_thickness_modifier(srna);
+
+	prop = RNA_def_property(srna, "amplitude", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "amplitude");
+	RNA_def_property_ui_text(prop, "Amplitude", "Amplitude of the noise");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "period", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "period");
+	RNA_def_property_ui_text(prop, "Period", "Period of the noise");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "seed", PROP_INT, PROP_NONE);
+	RNA_def_property_int_sdna(prop, NULL, "seed");
+	RNA_def_property_ui_text(prop, "Seed", "Seed for the noise generation");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "use_asymmetric", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "flags", LS_THICKNESS_ASYMMETRIC);
+	RNA_def_property_ui_text(prop, "Asymmetric", "Allow thickness to be assigned asymmetrically");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	srna = RNA_def_struct(brna, "LineStyleThicknessModifier_Curvature_3D", "LineStyleThicknessModifier");
+	RNA_def_struct_ui_text(srna, "Curvature 3D",
+						   "Line thickness based on the radial curvature of 3D mesh surfaces");
+	rna_def_thickness_modifier(srna);
+	rna_def_modifier_curve_common(srna, false, false);
+
+	prop = RNA_def_property(srna, "thickness_min", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "min_thickness");
+	RNA_def_property_range(prop, 0.0f, 10000.0f);
+	RNA_def_property_ui_text(prop, "Min Thickness", "Minimum thickness");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "thickness_max", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "max_thickness");
+	RNA_def_property_range(prop, 0.0f, 10000.0f);
+	RNA_def_property_ui_text(prop, "Max Thickness", "Maximum thickness");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "curvature_min", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "min_curvature");
+	RNA_def_property_range(prop, 0.0f, 10000.0f);
+	RNA_def_property_ui_text(prop, "Min Curvature", "Minimum Curvature");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "curvature_max", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "max_curvature");
+	RNA_def_property_range(prop, 0.0f, 10000.0f);
+	RNA_def_property_ui_text(prop, "Max Curvature", "Maximum Curvature");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	srna = RNA_def_struct(brna, "LineStyleThicknessModifier_CreaseAngle", "LineStyleThicknessModifier");
+	RNA_def_struct_ui_text(srna, "Crease Angle",
+	                       "Line thickness based on the angle between two adjacent faces");
+	rna_def_thickness_modifier(srna);
+	rna_def_modifier_curve_common(srna, false, false);
+
+	prop = RNA_def_property(srna, "angle_min", PROP_FLOAT, PROP_ANGLE);
+	RNA_def_property_float_sdna(prop, NULL, "min_angle");
+	RNA_def_property_ui_text(prop, "Min Angle", "Minimum angle to modify thickness");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "angle_max", PROP_FLOAT, PROP_ANGLE);
+	RNA_def_property_float_sdna(prop, NULL, "max_angle");
+	RNA_def_property_ui_text(prop, "Max Angle", "Maximum angle to modify thickness");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "thickness_min", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "min_thickness");
+	RNA_def_property_range(prop, 0.0f, 10000.0f);
+	RNA_def_property_ui_text(prop, "Min Thickness", "Minimum thickness");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	prop = RNA_def_property(srna, "thickness_max", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "max_thickness");
+	RNA_def_property_range(prop, 0.0f, 10000.0f);
+	RNA_def_property_ui_text(prop, "Max Thickness", "Maximum thickness");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
 	/* geometry modifiers */
 
 	srna = RNA_def_struct(brna, "LineStyleGeometryModifier", "LineStyleModifier");
@@ -1167,6 +1420,15 @@ static void rna_def_linestyle_modifiers(BlenderRNA *brna)
 	RNA_def_property_float_sdna(prop, NULL, "pivot_y");
 	RNA_def_property_ui_text(prop, "Pivot Y", "2D Y coordinate of the absolute pivot");
 	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
+
+	srna = RNA_def_struct(brna, "LineStyleGeometryModifier_Simplification", "LineStyleGeometryModifier");
+	RNA_def_struct_ui_text(srna, "Simplification", "Simplify the stroke set");
+	rna_def_geometry_modifier(srna);
+
+	prop = RNA_def_property(srna, "tolerance", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_float_sdna(prop, NULL, "tolerance");
+	RNA_def_property_ui_text(prop, "Tolerance", "Distance below which segments will be merged");
+	RNA_def_property_update(prop, NC_LINESTYLE, "rna_LineStyle_update");
 }
 
 static void rna_def_freestyle_color_modifiers(BlenderRNA *brna, PropertyRNA *cprop)