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Diffstat (limited to 'source/blender/blenkernel/intern/brush.c')
-rw-r--r-- | source/blender/blenkernel/intern/brush.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/brush.c b/source/blender/blenkernel/intern/brush.c index 1c53af97dbb..021f76fd2f1 100644 --- a/source/blender/blenkernel/intern/brush.c +++ b/source/blender/blenkernel/intern/brush.c @@ -328,6 +328,23 @@ float brush_sample_falloff(Brush *brush, float dist) return 0.0f; } +float brush_sample_falloff_noalpha(Brush *brush, float dist) +{ + float outer, inner; + + outer = brush->size >> 1; + inner = outer*brush->innerradius; + + if (dist <= inner) { + return 1.0f; + } + else if ((dist < outer) && (inner < outer)) { + return 1.0f - sqrt((dist - inner)/(outer - inner)); + } + else + return 0.0f; +} + void brush_sample_tex(Brush *brush, float *xy, float *rgba) { MTex *mtex= brush->mtex[brush->texact]; |