T60748 Second try to fix start extreme in Noise modifier

The first point was moving inverted because first vector was inverted. Now, the vector is changed for the first point to get the same direction.

diff --git a/source/blender/gpencil_modifiers/intern/MOD_gpencilnoise.c b/source/blender/gpencil_modifiers/intern/MOD_gpencilnoise.c
index 94f83f10fb5be36728e7818a3553312889b4219e..8b3752c802807ca9d735f0393fc4bb43c286fbea 100644 (file)
--- a/source/blender/gpencil_modifiers/intern/MOD_gpencilnoise.c
+++ b/source/blender/gpencil_modifiers/intern/MOD_gpencilnoise.c
@@ -170,7 +170,12 @@ static void deformStroke(
                }
 
                /* initial vector (p0 -> p1) */
-               sub_v3_v3v3(vec1, &pt1->x, &pt0->x);
+               if (i == 0) {
+                       sub_v3_v3v3(vec1, &pt0->x, &pt1->x);
+               }
+               else {
+                       sub_v3_v3v3(vec1, &pt1->x, &pt0->x);
+               }
                vran = len_v3(vec1);
                /* vector orthogonal to normal */
                cross_v3_v3v3(vec2, vec1, normal);