warp modifier, using negative strength inverts the transformation matrix but the location it gave wasnt useful when rotation was used too, just negate the translation.

1 files changed, 6 insertions, 0 deletions

diff --git a/source/blender/modifiers/intern/MOD_warp.c b/source/blender/modifiers/intern/MOD_warp.c
index 44eea3f9332..8825f640c03 100644
--- a/source/blender/modifiers/intern/MOD_warp.c
+++ b/source/blender/modifiers/intern/MOD_warp.c
@@ -198,8 +198,14 @@ static void warpModifier_do(WarpModifierData *wmd, Object *ob,
 	unit_m4(mat_unit);
 
 	if(strength < 0.0f) {
+		float loc[3];
 		strength = -strength;
+
+		/* inverted location is not useful, just use the negative */
+		copy_v3_v3(loc, mat_final[3]);
 		invert_m4(mat_final);
+		negate_v3_v3(mat_final[3], loc);
+
 	}
 	weight= strength;