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Suggested by Sergey Sharybin through a code review of the branch.
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and RNA for it independent of the build flag for enabling Freestyle. Suggested
by Sergey Sharybin through a code review of the branch.
* Many #ifdef WITH_FREESTYLE blocks were removed to always have Freestyle-specific
DNA file specification and RNA for it built in Blender. This will allow Freestyle
setting survive even when a non-Freestyle build is used for loading and saving
files. It is noted that operations are still conditionally built through #ifdef
WITH_FREESTYLE blocks.
* To this end, new blenkernel files BKE_freestyle.h and intern/freestyle.c have
been added. All API functions in FRS_freestyle_config.h as well as some of those
in FRS_freestyle.h were moved to the new files. Now the relocated API functions
have BKE_ prefix instead of FRS_.
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Suggested by IRIE Shinsuke through a code review of the branch.
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Based on review comment from Campbell.
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Conflicts resolved:
release/datafiles/startup.blend
release/scripts/startup/bl_ui/properties_render.py
source/blender/SConscript
source/blender/blenloader/intern/readfile.c
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The problem was caused by the fact that BKE_scene_copy() was simply doing "memcpy"
to duplicate render layers including lineset settings without taking care of pointers
in the linesets. For this reason, freeing the original scene and copied one resulted
in freeing allocated memory buffers twice.
Now BKE_scene_copy() properly duplicates linesets as part of render layers.
Also some code clean-up was made in the modified files.
Problem report by IRIE Shinsuke (with a patch to fix the crash). Many thanks!
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on the console during Freestyle rendering. The debug prints are turned off
by default now. Errors are still printed on the console.
A patch set implementing this functionality was provided by Bastien Montagne.
Many thanks! :)
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spaces around operators, and so forth). Many thanks!
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RNA subtype), since Freestyle internally use angles in radians.
A patch set by Bastien Montagne (many thanks!)
NOTICE FOR BRANCH USERS:
This commit may break line drawing settings of already saved Freestyle files.
All angles are now treated as radians instead of degrees, so collections of
angle values might be necessary in order to recover previous visual results.
Affected properties are:
- Crease Angle in the edge detection options
- Min 2D Angle in the 'Splitting' section of a line style
- Max 2D Angle in the 'Splitting' section of a line style
- 'orientation' parameter of the Calligraphy thickness modifier
- 'angle' parameter of the PerlinNoise1D geometry modifier
- 'angle' parameter of the PerlinNoise2D geometry modifier
- 'angle' parameter of the 2DTransform geometry modifier
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This commit makes a set of fixes and improvements based on the results of
Freestyle branch review by Brecht. The discussion thread is:
http://lists.blender.org/pipermail/bf-committers/2012-October/037927.html
* The Layers panel and Freestyle-related panels in the Render tab of the
Properties window were moved to the newly created Render Layers tab.
The idea is to separate per render layer rendering options into a distinct
Properties window tab, and use the existing Render tab to accommodate
per scene rendering options.
* The new Freestyle panel was added in the Render tab. The panel header
contains a toggle button for globally enabling Freestyle, with the aim of making
Freestyle easier to find. Those Freestyle options in the Post Processing panel
were also moved to the new panel.
* GUI code was updated so that UI controls will be greyed out (instead of
being hidden) when Freestyle is disabled. Additional UI changes were also
made to reduce space consumption.
* The list of line sets was moved from the Freestyle panel to the Freestyle:
Line Sets panel.
* Old ray-casting algorithms were removed from the UI. Now only two
algorithms (culled and non-culled cumulative visibility detection algorithms)
are available, and the selection is done by the new "Culling" toggle button
within the edge detection options.
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This commit is meant to improve the response of the ESC key for stopping Freestyle rendering
throughout the rendering process. The rendering with Freestyle consists of several steps
including: (1) mesh data loading, (2) winged edge construction, (3) silhouette edge detection,
(4) view map construction, and (5) stroke drawing. All these steps have been extended to
frequently check if the ESC key is pressed, so that users can abort time-consuming rendering
at any point of time.
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recovered in the Parameter Editor mode.
Several users requested the recovery as the removal of the two parameters was considered over-simplification for advanced users.
As in the Python Scripting mode, the two parameters are in the "advanced edge detection options" section and disabled by default.
Also the lower limit of Kr derivative epsilon was changed from 0 to -1000 so as to permit a negative value.
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Conflicts resolved:
source/blender/blenkernel/intern/material.c
source/blender/blenkernel/intern/subsurf_ccg.c
source/blender/blenloader/intern/readfile.c
source/blender/editors/animation/anim_channels_defines.c
source/blender/makesrna/intern/rna_scene.c
Additional changes:
* Fix for recent changes of BKE_* function renaming.
* Fix for an "attempt to free NULL pointer" in BlenderStrokeRenderer::RenderStrokeRepBasic().
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The Post Processing tab in the Render buttons has new Line Thickness options for
defining unit line thickness in two different modes as follows:
1. Absolute mode: The unit line thickness is given by a user-specified number
in units of pixels. The default value is 1.
2. Relative mode: The unit line thickness is scaled by the proportion of the
present vertical image resolution to 480 pixels. For instance, the unit line
thickness is 1 with the image height set to 480, 1.5 with 720, and 2 with 960.
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The Valley edge type is merely an alias of Ridge in the present Freestyle implementation.
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* Sphere radius and Kr derivative epsilon were removed from the
Parameter Editor mode. Now sphere radius of 1.0 and Kr derivative
epsilon of 0.0 are used by default. The rationale of the removal
is two-fold: little predictability and very minor artistic values.
The effects of these parameters are hard to estimate in advance,
which likely leads to a frustration of users due to repeated
trials and unpredicted results. Therefore, the two parameters
are considered to have quite limited artistic values. Proper
definitions of the two parameters more and less require the
knowledge of differential geometry and would not make sense to
most artists for which the Parameter Editor is intended.
* Sphere radius and Kr derivative epsilon are still available in
the Python Scripting mode, but now in an "advanced options" section
that is disabled and hidden by default. This way new users are
properly warned, while expert users with specific technical needs
can enable these options if they want. The same default values
mentioned above are used when the two parameters are disabled.
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Now the line set buffer is cleared when a new .blend file is opened, so
that a line set may not be copied and pasted between two .blend files.
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of copy/paste functionality. Instead of making a copy of the active
line set, now the settings of the active line set are copied to and
pasted from a buffer. This allows for copying and pasting line set
settings among different scenes and render layers.
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of the active line set.
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resolution (i.e., image width and height, scaled by the size factor).
Problem report by flokkievids together with a .blend file for reproducing
the bug, thanks!
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Conflicts resolved:
source/blender/render/intern/source/pipeline.c
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In the Parameter Editor mode, each edge type check button in the Selection
by Edge Types has now an associated toggle button to exclude the edge type
from the feature edge selection. This allows you to select, for instance,
those edges that are silhouette lines but not external contours.
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The problem was reported by mato.sus304, thank you!
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* View map calculation has been intensively optimized for speed by
means of:
1) new spatial grid data structures (SphericalGrid for perspective
cameras and BoxGrid for orthographic cameras; automatically switched
based on the camera type);
2) a heuristic grid density calculation algorithm; and
3) new line visibility computation algorithms: A "traditional"
algorithm for emulating old visibility algorithms, and a "cumulative"
algorithm for improved, more consistent line visibility, both exploiting
the new spatial grid data structures for fast ray casting.
A new option "Raycasting Algorithm" was added to allow users to choose
a ray casting (line visibility) algorithm. Available choices are:
- Normal Ray Casting
- Fast Ray Casting
- Very Fast Ray Casting
- Culled Traditional Visibility Detection
- Unculled Traditional Visibility Detection
- Culled Cumulative Visibility Detection
- Unculled Cumulative Visibility Detection
The first three algorithms are those available in the original
Freestyle (the "normal" ray casting was used unconditionally, though).
The "fast" and "very fast" ray casting algorithms achieve a faster
calculation at the cost of less visibility accuracy.
The last four are newly introduced optimized options. The culled
versions of the new algorithms will exclude from visibility
calculation those faces that lay outside the camera, which leads to a
faster view map construction. The unculled counterparts will take all
faces into account. The unculled visibility algorithms are useful
when culling affects stroke chaining.
The recommended options for users are the culled/unculled cumulative
visibility algorithms. These options are meant to replace the old
algorithms in the future.
Performance improvements over the old algorithms depend on the scenes
to be rendered.
* Silhouette detection has also been considerably optimized for speed.
Performance gains by this optimization do not depend on scenes.
* Improper handling of error conditions in the view map construction
was fixed.
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The problem was caused by a stroke with only one vertex. Such a stroke was
generated when for some unknown reason a chained curve consisted of only
two vertices such that their 3D positions were exactly or almost the same.
* Fix for the Parameter Editor mode that failed when scene render layers
and/or linesets contain a single quote in their names.
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* Made changes to the Controller so that dynamically allocated
memory areas (e.g. imported mesh data, winged edges, and a view map)
are released soon after they become unnecessary.
* Added a new feature edge selection criterion based on image border.
When the "Selection by Image Border" option is enabled, feature edges
are selected only if they are within the border of the image being
rendered. The border is defined either by the frame size or a border
region (specified by the Shift-B key in a 3D View window). When large
scenes are rendered, this clipping by the image border leads to less
memory consumption.
* Enabled the "Silhouette", "Border", and "Crease" edge types of
the Selection by Edge Types option by default.
When no edge types are specified, all feature edges including "Ridge",
"Valley" and "Suggestive Contour" are detected at the cost of extra
memory consumption. Disabling these three edge types and enabling
some other edge type leads to less memory consumption. This change
is intended to help new Freestyle users by providing a typical, low
memory consumption default setting.
* Slightly rearranged the UI controls for feature edge selection.
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The Freestyle tab in the Render buttons has a couple of new
options "Group" and "Group Negation". The Group option specifies
a group of objects (defined through the Groups tab in the Object
buttons), while the Group Negation value is either INCLUSIVE or
EXCLUSIVE. If INCLUSIVE, feature edges belonging to some object
in the group are selected. Otherwise, those feature edges not
belonging to any object in the group are selected.
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from scenes.
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In the Parameter Editor mode, three feature edge detection
options (i.e., Ridges and Valleys, Suggestive Contours, and
Material Boundaries) are automatically configured based on
feature edge selection settings of linesets.
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Parameter Editor mode. This is a WIP commit. Only the base line
color, base alpha transparency, and base line thickness are respected.
More additions are anticipated to account for other parameters.
* Added FRS_finish_stroke_rendering() to clean Freestyle-related
temporary resources after stroke rendering.
* Some functions in FRS_freestyle.cpp are now declared as static
functions, so as not to mess up the program-wide name space.
* Made the StyleModule class inheritable, and defined new subclass
BlenderStyleModule that takes a Text object instead of a file name.
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criteria. Now the Inclusive/Exclusive and Logical AND/OR options are
only applied to feature edge types, while the conditions on visibility
and edge types are always combined by logical conjunction. Also, the
crease angle, sphere radius and Kr derivative epsilon are treated as
render layer-specific options instead of lineset-specific options.
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* 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.
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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.
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An entry "Crease Angle" has been added to the Layers tab of the Render
buttons, to allow users to specify an angle (between 0 and 180) used for
crease edge detection. An edge is considered a crease edge if the angle
between two faces sharing the edge is smaller than the threshold. The
default value is 134.43 degrees (for backward compatibility). Be aware
that a larger threshold leads to a larger number of feature edges and
thus a larger memory consumption.
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A checkbox "Material Boundaries" has been added to the Freestyle
options in the Layers tab of the Render buttons. By enabling the
option, any edge between two faces with different materials is
detected as a feature edge. In style modules, edges at material
boundaries can be tested with pyNatureUP1D(Nature.MATERIAL_BOUNDARY).
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of _POSIX_C_SOURCE and _XOPEN_SOURCE. There are no functional changes.
Tested with GCC 4.4.1 on Ubuntu 9.10 (karmic).
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the diffuse and Z depth information accessible from style modules when
the border option is enabled.
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diffuse and Z depth information through style modules won't work
correctly with the border option. Another fix will follow.
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was turned off.
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The render pipeline has been extended to better work with
Freestyle stroke rendering. Struct Render has a new member
ListBase freestyle_renders to keep Render instances generated
through stroke rendering in Freestyle. The number of
elements (LinkData instances with LinkData::data pointing to a
Render instance) in freestyle_renders is the same as the scene
render layers of the scene being rendered. When the k-th scene
render layer has the Freestyle option enabled, the k-th element
of freestyle_renders refers to a Render instance that holds
Freestyle render results for the scene layer. This association
between the scene render layer and the Render instance is used to
merge the Freestyle render results into the corresponding render
results for the scene render layer.
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AppCanvas::readDepthPixels() that caused a crash when
the aspect ratio was not 1:1.
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Availability of pixel-based density and Z depth information depends
on passes of a render layer being rendered.
- Density information is available if the diffuse pass of the render
layer is enabled. It is accessible through the DensityF0D and
DensityF1D functions provided by the Freestyle Python API. These
functions return 0 if the diffuse pass is disabled.
- Z depth information is available if the Z pass is enabled. It can
be accessed through LocalAverageDepthF0D and LocalAverageDepthF1D.
These functions return 0 if the Z pass is disabled.
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the Info window.
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ESC key press checks are performed 1) before entering Freestyle, and
2) after the completion of the view map creation.
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Previously mesh vertices imported from vlak nodes were transformed
from the camera coordinate system to the object local coordinate
system. This causes a difficulty in recovering object local vertices
when mesh deforming modifiers (e.g., curve, cloth, and soft body) have
been applied. Now the view map creation is done based on mesh
vertices in the camera coordinate system. Advantages of this approach
includes: 1) faster mesh importing because of less matrix-based
transformations; and 2) proper handling of meshes with deforming
modifiers.
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The renderer now takes the aspect ratio settings into account.
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instability issues regarding the view map creation. A new iterative
solver of the 2D-to-3D inverse projection transformation problem was
implemented. Instead of directly solving the problem in the direction
from the 2D to 3D space, the new solver starts with an initial guess of
an approximated solution and asymptotically approaches to the true
solution by iteratively performing the forward 3D-to-2D projection
transformation and improving the approximation. Preliminary tests with
one simple and another complex scenes showed that the solver converges
quickly (more and less 20 iterations in many cases, with a stopping
criterion of a residual distance between the true and approximated
solutions less than 1e-6 Blender Unit).
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