diff options
Diffstat (limited to 'source/blender/python/mathutils/mathutils_Vector.c')
| -rw-r--r-- | source/blender/python/mathutils/mathutils_Vector.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/source/blender/python/mathutils/mathutils_Vector.c b/source/blender/python/mathutils/mathutils_Vector.c index 07bda4c2b91..54044b62e04 100644 --- a/source/blender/python/mathutils/mathutils_Vector.c +++ b/source/blender/python/mathutils/mathutils_Vector.c @@ -2268,6 +2268,11 @@ static int Vector_swizzle_set(VectorObject *self, PyObject *value, void *closure axis_from = 0; swizzleClosure = GET_INT_FROM_POINTER(closure); + /* We must first copy current vec into tvec, else some org values may be lost. + * See [#31760]. + * Assuming self->size can't be higher than MAX_DIMENSIONS! */ + memcpy(tvec, self->vec, self->size * sizeof(float)); + while (swizzleClosure & SWIZZLE_VALID_AXIS) { axis_to = swizzleClosure & SWIZZLE_AXIS; tvec[axis_to] = vec_assign[axis_from]; @@ -2275,7 +2280,9 @@ static int Vector_swizzle_set(VectorObject *self, PyObject *value, void *closure axis_from++; } - memcpy(self->vec, tvec, axis_from * sizeof(float)); + /* We must copy back the whole tvec into vec, else some changes may be lost (e.g. xz...). + * See [#31760]. */ + memcpy(self->vec, tvec, self->size * sizeof(float)); /* continue with BaseMathObject_WriteCallback at the end */ if (BaseMath_WriteCallback(self) == -1) |