142 lines
4.6 KiB
Python
142 lines
4.6 KiB
Python
# SPDX-License-Identifier: GPL-2.0-or-later
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# by Yann Bertrand, january 2014.
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bl_info = {
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"name": "Curve Outline",
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"description": "creates an Outline",
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"author": "Yann Bertrand (jimflim), Vladimir Spivak (cwolf3d)",
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"version": (0, 5),
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"blender": (2, 69, 0),
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"category": "Object",
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}
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import bpy
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from mathutils import Vector
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from mathutils.geometry import intersect_line_line
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from . import util
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def createOutline(curve, outline):
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for spline in curve.data.splines[:]:
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if spline.type == 'BEZIER':
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p = spline.bezier_points
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if len(p) < 2:
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return
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out = []
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n = ((p[0].handle_right - p[0].co).normalized() - (p[0].handle_left - p[0].co).normalized()).normalized()
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n = Vector((-n[1], n[0], n[2]))
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o = p[0].co + outline * n
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out.append(o)
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for i in range(1,len(p)-1):
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n = ((p[i].handle_right - p[i].co).normalized() - (p[i].handle_left - p[i].co).normalized()).normalized()
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n = Vector((-n[1], n[0], n[2]))
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o = intersect_line_line(out[-1], (out[-1]+p[i].co - p[i-1].co), p[i].co, p[i].co + n)[0]
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out.append(o)
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n = ((p[-1].handle_right - p[-1].co).normalized() - (p[-1].handle_left - p[-1].co).normalized()).normalized()
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n = Vector((-n[1], n[0], n[2]))
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o = p[-1].co + outline * n
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out.append(o)
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curve.data.splines.new(spline.type)
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if spline.use_cyclic_u:
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curve.data.splines[-1].use_cyclic_u = True
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p_out = curve.data.splines[-1].bezier_points
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p_out.add(len(out)-1)
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for i in range(len(out)):
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p_out[i].handle_left_type = 'FREE'
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p_out[i].handle_right_type = 'FREE'
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p_out[i].co = out[i]
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if i<len(out)-1:
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l = (p[i + 1].co - p[i].co).length
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l2 = (out[i] - out[i + 1]).length
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if i==0:
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p_out[i].handle_left = out[i] + ((p[i].handle_left - p[i].co) * l2/l)
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if i<len(out)-1:
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p_out[i + 1].handle_left = out[i + 1] + ((p[i + 1].handle_left - p[i + 1].co) * l2/l)
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p_out[i].handle_right = out[i] + ((p[i].handle_right - p[i].co) * l2/l)
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for i in range(len(p)):
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p_out[i].handle_left_type = p[i].handle_left_type
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p_out[i].handle_right_type = p[i].handle_right_type
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else:
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if len(spline.points) < 2:
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return
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p = []
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for point in spline.points:
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v = Vector((point.co[0], point.co[1], point.co[2]))
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p.append(v)
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out = []
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n = ((p[1] - p[0]).normalized() - (p[-1] - p[0]).normalized()).normalized()
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n = Vector((-n[1], n[0], n[2]))
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o = p[0] + outline * n
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out.append(o)
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for i in range(1,len(p)-1):
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n = ((p[i+1] - p[i]).normalized() - (p[i-1] - p[i]).normalized()).normalized()
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n = Vector((-n[1], n[0], n[2]))
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o = intersect_line_line(out[-1], (out[-1]+p[i] - p[i-1]), p[i], p[i] + n)[0]
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out.append(o)
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n = ((p[0] - p[-1]).normalized() - (p[-2] - p[-1]).normalized()).normalized()
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n = Vector((-n[1], n[0], n[2]))
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o = p[-1] + outline * n
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out.append(o)
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curve.data.splines.new(spline.type)
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if spline.use_cyclic_u:
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curve.data.splines[-1].use_cyclic_u = True
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p_out = curve.data.splines[-1].points
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p_out.add(len(out)-1)
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for i in range(len(out)):
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p_out[i].co = (out[i][0], out[i][1], out[i][2], 0.0)
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return
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class CurveOutline(bpy.types.Operator):
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"""Curve Outliner"""
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bl_idname = "curvetools.outline"
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bl_label = "Create Outline"
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bl_options = {'REGISTER', 'UNDO'}
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outline: bpy.props.FloatProperty(name="Amount", default=0.1)
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@classmethod
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def poll(cls, context):
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return util.Selected1OrMoreCurves()
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def execute(self, context):
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createOutline(context.object, self.outline)
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return {'FINISHED'}
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def invoke(self, context, event):
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return context.window_manager.invoke_props_popup(self, event)
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def menu_func(self, context):
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self.layout.operator(CurveOutline.bl_idname)
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def register():
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for cls in classes:
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bpy.utils.register_class(operators)
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def unregister():
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for cls in classes:
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bpy.utils.unregister_class(operators)
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if __name__ == "__main__":
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register()
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operators = [CurveOutline]
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