if a value other than 1/0 was given it would use an uninitialized pointer too (compiler warning, review should pick up this stuff).
also renamed some RNA attrs:
output_name --> output_name_a
output_name2 --> output_name_b
do_output1 --> use_output_a
do_output2 --> use_output_b
do_smudge --> use_smudge
max_velocity --> velocity_max
* Renamed "Sharp" proximity falloff to "Constant".
* Added a new "Negate Volume" option for "Volume + Proximity" brush.
* Possible fix for random particle clipping errors.
* Added BKE_dynamicpaint.h to CMake list.
* Changed some unsigned integers back to signed, as OpenMP can't iterate unsigned values anyway.
* Fixed more warnings.
* Fixed another issue from latest alpha blending changes. Zero alpha brush was painting black color.
* Fix: "Inner Proximity" brush setting was also affecting displace.
* Other small code changes.
* Redesigned alpha blending and paint drying algorithms. Now it gives much better results when using low brush alpha or when surface has initial color set.
* Fix: "Slow" dissolve/dry was scaled incorrect when using substeps. Also adjusted time to better match non-"slow" setting.
* Fixed possible issues when using image textured brush.
* Fix: particle brush panel was no longer visible since last commit.
* Adjusted default surface values.
* Some more code cleanup.
* Fix: Wave "timescale" also changed simulation behavior. Now different timescale values will lead to nearly identical results, just slower or faster.
* Added "Displace Factor" setting for vertex displace surfaces. You can use it to adjust final displace strength or use negative values to paint bumps.
* Added clamp/map value to wave image sequence output settings.
* RNA description tweaking.
* General code tweaking.
* Enabled modifier "Apply" button since it can now be used to apply displacement or output layers to the mesh.
* Default surface output names are now unique in case canvas has multiple surfaces of same type.
* Merged "face aligned" and "non-closed" brush options to a single "Project" toggle, available for "Proximity" brushes.
* Added more icons to user interface selections.
* Increased default proximity distance.
* Set proximity falloff ramp to only affect alpha by default.
* Removed some no longer required render ext. functions.
* Fix: geometry node vertex alpha didn't work unless "Vertex Color Paint/Light" was enabled from material.
* Added "Initial Color" setting for surfaces. You can for example set color from UV mapped texture or from vertex colors.
* Added clamping option for "wave" brushes.
* Merged smudge and drip adjacency search code. This fixes some issues with drip effect and makes code easier to maintain.
* Some adjustments to the bounding box generation code.
* OpenMP is now completely disabled if no compile flag is set.
* Wetness values are now properly clamped on vertex surfaces. No more black dots on >1.0 wetness.
* Textured brushes now use same function calls as internal renderer, instead of modified duplicates.
* Moved operator code to editors/physics/.
* Re-enabled some particle brush optimizations.
* Fixed sometimes incorrect volume brush influence.
* Fixed possible crash when using a brush that uses "Voxel Data" texture simultaneously with material preview or render.
* Fixed texture mapping issues for "Object Center" brush.
* Fixed possible crash/corruption when duplicating brush object that uses color ramps.
* Other tweaking and code cleanup.
* Added option to preview surface wetmap instead of paint.
* Changed default paint color to blue for better visibility.
* Fix: Random sized particles didn't work anymore.
* Fix: Particle initial velocity issues when using canvas substeps and a particle brush.
* Bake calculation memory is now freed if surface is deactivated or baked.
* Fixed possibly incorrect brush influence when using "Non-Closed" brush setting.
* Added new rna property descriptions.
* Added some comments and general code cleanup.
* Added a new "color spread" slider for "spread" effect to adjust how much colors get mixed.
* Improved smudge behavior on "wet" paint.
* Displace can now be set "incremental". This way it's added on top of previous displace.
* Added "displace clamp" setting. You can use it to limit maximum amount of displace.
* Fix: velocity data wasn't always initialized, this could lead to no effect at all or crash.
* Fix: Vertex color rendering near zero alpha values was still incorrect.
* Object velocity can now be used to determine brush influence and color.
* Brushes can now be set to "smudge" existing paint.
* Added new operators to easily add and remove surface output mesh data layers from Dynamic Paint ui.
* Fixed drip effect algorithm to work properly on forces pointing towards surface.
* Adjusted drip effect speed.
* Drip effect can now use canvas velocity and acceleration to influence drip direction.
* Fixed texture mapping for material enabled brushes.
* "Object Center" type brushes can now use "material color" as well.
* Improved surface partitioning grid generation algorithm.
* Fixed possible invalid brush collision detection when OpenMP enabled.
* Fixed incorrect random sized particle displace/wave influence.
* Fixed "Object Center" brush color ramp falloff.
* Fixed invalid zero alpha sampling when rendering vertex colors.
* Lots of smaller tweaking.
* Forgot to change node socket ids.
* Fixed "shrink" effect artifacts on wetmap.
There was a typo in previous commit message. Should be "alpha support for vertex color rendering".
* Added alpha support renderer for vertex colors. You can now easily render Dynamic Paint produced vertex colors by checking "Vertex Color" in material options.
* Added "Vertex Alpha" socket for "Geometry" material node.
* Fixed vertex surface color output issues.
* Surface bake data is no longer recalculated every frame, but only when surface mesh has moved/transformed. Results in multiple times better performance on high resolution surfaces when using sub-steps or surface is still.
* Heavily optimized particle brushes when random particle size enabled. Up to 10x speedup with large radius particles.
* Added an additional "grid" space partitioning structure for surfaces.
* Added bounding box checks for brushes.
* Smaller overall optimization.
* Further OpenMP parallelization.
* Added physics tab link to modifier panel.
* Fix: "Point Density" texture cache wasn't properly updated. Brushes can now use Point Density textures as well.
* Fix: Paint dissolve resulted in black color.
* Fix: KD-tree checkups weren't completely thread safe. Fixes possible crash with OpenMP enabled particle brushes.
* Fix: When brush was set to use a specific material, it was saved incorrectly and resulted in potential crashes on next load.
* Proximity brush color ramp should now work properly with any type of proximity brush.
* Dynamic Paint operators (adding surfaces, baking, etc.) now affect right object even when ui is pinned to a non-selected object.
* Fixed proximity falloff for vertex weight surfaces.
* Fixed possible color issue with low alpha brushes.
* Fixed a compiler warning.
* Canvas and brush can be now enabled simultaneously. This way it's possible for two canvases to interact.
* Added basic anti-aliasing support for vertex surfaces.
* 3D-view color preview now works even when there's subsurf modifier after Dynamic Paint in modifier stack.
* Added a new brush option to use proximity from object center.
* Default surface frame range now use scene's start and end values.
* Improved ray checks for volume brushes.
* Added new "non-closed" option for volume brushes. This way it's possible to use planar meshes as "volume" brushes with predefined ray direction.
* New carrot branch splash image by CGEffex.
* Improved brush affection code.
* Lots of smaller improvements.
* Fixed: Weight paint didn't work with particles.
* Fixed: Point cache didn't work for non-wave surfaces anymore since last commit.
* Fixed memory leak when baking image sequences.
* Fixed sub-steps when brush was controlled by a parent object.
* Added option to select active outputs for paint surfaces.
* Improved color mixing algorithm.
* Improved memory allocation behavior.
* Memory is now freed even in case of errors.
* Removed "initial color" setting, as it's better to adjust color from material.
* "Paint effects" system:
** Converted to use new data structures.
** Works now with any number of surrounding points.
** Re-implemented support for UV-image surfaces.
** Added support for vertex surfaces too.
** Improved color handling.
** Improved movement stability.
** "Drip" effect uses now Blender's force fields instead of just z-directional gravity like before. Now each surface point can have different force influence.
* Added vertex weight painting.
* Added dissolve/fade setting for every surface type.
* Restored image format and displace type selection for image sequences.
* Fixed a possible crash when OpenMP enabled.
* Attempt to fix surface rna paths.
* Fixed compile warnings.
* Image sequence anti-aliasing works again.
* Vertex color viewport preview now works with GLSL and textured view modes too.
* Added a new "inverse" setting for "volume + proximity" brush. With it brush only has effect within volume but effect is lower near the mesh surface.
Committed changes from previous weeks, biggest changes are:
* Canvas can now have multiple "surfaces" that each can have specific format, type and settings.
* Renewed UI to support this new system.
* Aside from old "image sequence" output format, Dynamic Paint can now work on vertex level as well. Currently vertex paint and displace are supported.
* Integrated vertex level painting with Point Cache.
* Added viewport preview for Point Cache surfaces.
Due to massive amount of changes, old Dynamic Paint saves are no longer supported. Also some features are temporarily missing or may not work properly.
