[Bf-blender-cvs] [dc3fb012e74] master: Fix T82297: Brush alpha not affecting smear tools strength

[Pablo Dobarro]

Commit: dc3fb012e749e887e8439df7c4737295c6c0234d
Author: Pablo Dobarro
Date:   Mon Nov 2 20:27:42 2020 +0100
Branches: master
https://developer.blender.org/rBdc3fb012e749e887e8439df7c4737295c6c0234d

Fix T82297: Brush alpha not affecting smear tools strength

The strength of this brush needs to take alpha into account

Reviewed By: sergey

Maniphest Tasks: T82297

Differential Revision: https://developer.blender.org/D9419

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M	source/blender/editors/sculpt_paint/sculpt.c

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diff --git a/source/blender/editors/sculpt_paint/sculpt.c b/source/blender/editors/sculpt_paint/sculpt.c
index 754204201f4..d4bd15badac 100644
--- a/source/blender/editors/sculpt_paint/sculpt.c
+++ b/source/blender/editors/sculpt_paint/sculpt.c
@@ -2347,7 +2347,7 @@ static float brush_strength(const Sculpt *sd,
       final_pressure = pressure * pressure;
       return final_pressure * overlap * feather;
     case SCULPT_TOOL_SMEAR:
-      return pressure * overlap * feather;
+      return alpha * pressure * overlap * feather;
     case SCULPT_TOOL_CLAY_STRIPS:
       /* Clay Strips needs less strength to compensate the curve. */
       final_pressure = powf(pressure, 1.5f);