Commit: 283af786579b4d5e094332a15d95a5c888647b13
Author: Campbell Barton
Date: Thu Oct 6 17:32:11 2022 +1100
Branches: blender-v2.93-release
https://developer.blender.org/rB283af786579b4d5e094332a15d95a5c888647b13
Fix T101591: mathutils.geometry.intersect_line_line 2D vector error
Uninitialized stack memory was used when intersecting 2D vectors.
===================================================================
M source/blender/python/mathutils/mathutils_geometry.c
===================================================================
diff --git a/source/blender/python/mathutils/mathutils_geometry.c
b/source/blender/python/mathutils/mathutils_geometry.c
index 4b09c08f62c..b431c45062f 100644
--- a/source/blender/python/mathutils/mathutils_geometry.c
+++ b/source/blender/python/mathutils/mathutils_geometry.c
@@ -193,6 +193,13 @@ static PyObject *M_Geometry_intersect_line_line(PyObject
*UNUSED(self), PyObject
return NULL;
}
+ /* Zero 3rd axis of 2D vectors. */
+ if (len == 2) {
+ lines[1][2] = 0.0f;
+ lines[2][2] = 0.0f;
+ lines[3][2] = 0.0f;
+ }
+
result = isect_line_line_v3(UNPACK4(lines), i1, i2);
/* The return-code isn't exposed,
* this way we can check know how close the lines are. */
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