that produces a blueprint using circular, elliptic, and square contour strokes.
Related changes and bug fixes were made as follows:
* The randomness in radius and center has been transformed into optional
parameters of the pyBluePrintCirclesShader and pyBluePrintEllipsesShader.
Also a new optional parameter to control the randomness of backbone
stretching has been added to the pyBluePrintSquaresShader.
* A bug in the pyBluePrintSquaresShader that invisible stroke vertices at
corners of rectangular contour strokes were not properly drawn. The problem
was due to the changes of the / operator between Python 2.x to 3.x. Even
when the two operands of the division operator are integers, Python 3.x
gives a floating-point number when the quotient is not an integer. The fix
was just to replace the / operator by the // operator for integer division.
* An unpleasant discontinuity in circular and elliptical contour strokes
was fixed.
* The length parameter of the Backbone Stretcher geometry modifier has been
renamed to `backbone_length' in line with the parameter of the same name in
the pyBluePrintSquaresShader.
New there are only two chaining types: plain and sketchy. Both chaining types
have the "same object" option. With this option enabled, only feature edges of
the same object are chained. The sketchy chaining also has the "rounds" option
to specify the number of rounds in a sketchy multiple touch.
Also removed a temporary workaround (implemented by means of a custom chaining
rule) for infinite straight lines, which has resulted in much cleaner strokes.
The default chaining option is now called "Natural", while the new chaining options
are "Sketchy: Topology Preserved" and "Sketchy: Topology broken". The latter two
options allow for generating chains of feature edges with a sketchy multiple touch.
The "Sketchy: Topology Preserved" option takes account of the topology of objects
in the view map, while the "Sketchy: Topology broken" ignores the edge topology.
The "rounds" option specifies the number of rounds in sketchy strokes.
Added a set of stroke geometry modifiers to the Geometry tab of line styles
in the Parameter Editor mode. Now the following stroke geometry modifiers are
available, each with a set of animateable parameters:
- Sampling: changes the resolution of stroke backbone polylines.
- Bezier Curve: replace stroke backbone with a Bezier approximation of the
stroke backbone.
- Sinus Displacement: add sinus displacement to stroke backbone.
- Spatial Noise: add spatial noise to stroke backbone.
- Perlin Noise 1D: add one-dimensional Perlin noise to stroke backbone.
- Perlin Noise 2D: add two-dimensional Perlin noise to stroke backbone.
- Backbone Stretcher: stretch the beginning and the end of strokes.
- Tip Remover: remove a piece of stroke at the beginning and the end of strokes.
To branch users: When you have a .blend file with Freestyle options specified,
you may want to add a Sampling modifier with the 'sampling' value set to 5.
This value specifies a resolution of polylines for line drawing in Freestyle.
If no sampling modifier is specified, your line drawing will result in coarse
polylines. Before geometry modifiers were introduced, this initial sampling
was automatically done. Now the initial sampling is a tunable parameter that
can be omitted, allowing better control on polyline resolution.
of both ends of strokes. The three cap types are: 1) butt caps (flat);
2) round caps (half-circle); and 3) square caps (flat and extended).
Also implemented an option to join those feature edges of the same
object. These options are available in the "Stroke" tab of the
"Freestyle: Line Style" panel in the Render buttons.
Most stylization parameters in line style datablocks are now
animatable by means of keyframes. Right click on a line
style parameter, and you will see a list of keyframe-related
commands in the context menu.
Concerning the implementation, RNA path resolution has been
extended to properly address color ramps in line style color
modifiers. File I/O has been also improved to load/save the
animation data associated with line style datablocks.
Known issue: Freestyle-related options in render layers are
not animatable at the moment, because of general inability (or
maybe a bug) that keyframes cannot be inserted with respect to
render layer options.
A number of UI elements were newly introduced to control line color, alpha
transparency and line thickness by means of base color/alpha/thickness plus
modifiers that alter the base values. To begin with, three basic modifiers
were prototyped with the aim of putting the new UI framework in practice
and evaluating if it works properly.
The Parameter Editor mode is still in a work-in-progress state and totally
useless from users' viewpoint.
* Moved render layer-specific Freestyle options to a separate "Freestyle"
tab (in addition to the "Freestyle: Line Style" tab that has been introduced
in the previous commit).
* Added UI controls for specifying feature edge selection criteria in the
Parameter Editor mode. Feature edge selection starts with a set of all
feature edges in the view map. Each line set specifies edge selection
criteria (e.g., to select only visible crease edges) by enabling appropriate
UI controls (e.g., by turning on the "Crease" and "Visibility" toggle
buttons). Selected criteria are combined by logical conjunction. Logical
disjunction (e.g., "crease edges or contours") is represented by two or
more line sets.
* Slightly rearranged several UI controls in the Python Scripting mode.
This commit is just meant to give the new GUI framework a concrete shape.
There is no usefulness in newly introduced elements at the moment.
Freestyle options in render layers now include a pull-down menu named Control
Mode that allows you to choose either the Python Scripting or Parameter Editor
mode. The Python Scripting mode is the conventional way of controlling
Freestyle by directly using style modules written in Python. The Parameter
Editor is a new control mode that is intended to be used by everyone without
relying on Python programming.
In the Parameter Editor mode, you can specify multiple line sets for each
render layer. A line set defines feature edge selection criteria, as
well as a line style for drawing the selected feature edges using specific
line stylization parameters. Line style is a new datablock type, meaning
that a line style can be shared by multiple line sets (possibly those in
different render layers in different scenes).
Much more additions are anticipated in subsequent commits to implement UI
controls for specifying feature edge selection criteria and line stylization
parameters.
