Bugfix, own testing

When pressure was zero, a sculpt brush was still being executed
with step amount divided by zero, and thus entering eternal loop.

Maybe tablet-specific this but I wonder how this never got reported...

2 files changed, 11 insertions, 6 deletions

diff --git a/source/blender/editors/sculpt_paint/paint_stroke.c b/source/blender/editors/sculpt_paint/paint_stroke.c
index 125e570946b..15bb574448f 100644
--- a/source/blender/editors/sculpt_paint/paint_stroke.c
+++ b/source/blender/editors/sculpt_paint/paint_stroke.c
@@ -769,14 +769,18 @@ static int paint_space_stroke(bContext *C, wmOperator *op, wmEvent *event, const
 			float pressure;
 
 			pressure = event_tablet_data(event, NULL);
-			scale = (brush_size(stroke->brush)*pressure*stroke->brush->spacing/50.0f) / length;
-			mul_v2_fl(vec, scale);
+			if(pressure > FLT_EPSILON) {
+				scale = (brush_size(stroke->brush)*pressure*stroke->brush->spacing/50.0f) / length;
+				if(scale > FLT_EPSILON) {
+					mul_v2_fl(vec, scale);
 
-			steps = (int)(1.0f / scale);
+					steps = (int)(1.0f / scale);
 
-			for(i = 0; i < steps; ++i, ++cnt) {
-				add_v2_v2(mouse, vec);
-				paint_brush_stroke_add_step(C, op, event, mouse);
+					for(i = 0; i < steps; ++i, ++cnt) {
+						add_v2_v2(mouse, vec);
+						paint_brush_stroke_add_step(C, op, event, mouse);
+					}
+				}
 			}
 		}
 	}
diff --git a/source/blender/editors/sculpt_paint/sculpt.c b/source/blender/editors/sculpt_paint/sculpt.c
index 6429a70515b..c0399fadb90 100644
--- a/source/blender/editors/sculpt_paint/sculpt.c
+++ b/source/blender/editors/sculpt_paint/sculpt.c
@@ -306,6 +306,7 @@ static void sculpt_brush_test_init(SculptSession *ss, SculptBrushTest *test)
 {
 	test->radius_squared= ss->cache->radius_squared;
 	copy_v3_v3(test->location, ss->cache->location);
+	test->dist= 0.0f;	/* just for initialize */
 }
 
 static int sculpt_brush_test(SculptBrushTest *test, float co[3])