Vertex Paint minor improvement w/ smear
Note that this tool seems like it might need to be rewritten since results are quite strange. Projecting on the view vector gives a small improvement though.
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@ -1459,6 +1459,8 @@ static void do_wpaint_brush_smear_task_cb_ex(
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float brush_dir[3];
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sub_v3_v3v3(brush_dir, cache->location, cache->last_location);
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project_plane_v3_v3v3(brush_dir, brush_dir, cache->view_normal);
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if (normalize_v3(brush_dir) != 0.0f) {
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SculptBrushTest test;
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@ -1501,6 +1503,8 @@ static void do_wpaint_brush_smear_task_cb_ex(
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/* Get the direction from the selected vert to the neighbor. */
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float other_dir[3];
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sub_v3_v3v3(other_dir, mv_curr->co, mv_other->co);
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project_plane_v3_v3v3(other_dir, other_dir, cache->view_normal);
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normalize_v3(other_dir);
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const float stroke_dot = dot_v3v3(other_dir, brush_dir);
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@ -2485,6 +2489,8 @@ static void do_vpaint_brush_smear_task_cb_ex(
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const bool use_face_sel = (data->me->editflag & ME_EDIT_PAINT_FACE_SEL) != 0;
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sub_v3_v3v3(brush_dir, cache->location, cache->last_location);
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project_plane_v3_v3v3(brush_dir, brush_dir, cache->view_normal);
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if (normalize_v3(brush_dir) != 0.0f) {
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SculptBrushTest test;
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@ -2532,6 +2538,8 @@ static void do_vpaint_brush_smear_task_cb_ex(
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/* Get the direction from the selected vert to the neighbor. */
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float other_dir[3];
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sub_v3_v3v3(other_dir, mv_curr->co, mv_other->co);
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project_plane_v3_v3v3(other_dir, other_dir, cache->view_normal);
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normalize_v3(other_dir);
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const float stroke_dot = dot_v3v3(other_dir, brush_dir);
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