3D mapping for projective texture painting (only for draw brush). Useful

to draw with procedural textures on surface of object. 2D painting will
still paint as if tiled.

When we unify the paint systems, the texture sampling functions will
need to be changed. Sculpt uses a slightly different system that passes
both screen and 3d coordinates to the sampling function. This commit
however is not too disrupting for that however so it can go in now.

1 files changed, 2 insertions, 1 deletions

diff --git a/source/blender/blenkernel/BKE_brush.h b/source/blender/blenkernel/BKE_brush.h
index 248fe9c8968..b19a9c4d4eb 100644
--- a/source/blender/blenkernel/BKE_brush.h
+++ b/source/blender/blenkernel/BKE_brush.h
@@ -67,7 +67,8 @@ float BKE_brush_curve_strength_clamp(struct Brush *br, float p, const float len)
 float BKE_brush_curve_strength(struct Brush *br, float p, const float len); /* used for sculpt */
 
 /* sampling */
-void BKE_brush_sample_tex(const struct Scene *scene, struct Brush *brush, const float xy[2], float rgba[4], const int thread);
+void BKE_brush_sample_tex(const struct Scene *scene, struct Brush *brush, const float sampleco[3], float rgba[4], const int thread);
+void BKE_brush_sample_tex_2D(const struct Scene *scene, struct Brush *brush, const float xy[2], float rgba[4], const int thread);
 void BKE_brush_imbuf_new(const struct Scene *scene, struct Brush *brush, short flt, short texfalloff, int size,
                          struct ImBuf **imbuf, int use_color_correction);