From adfffb7d32a2f8e09ad43aae6d6b51c50cb2807e Mon Sep 17 00:00:00 2001
From: Jacques Lucke <jacques@blender.org>
Date: Sun, 12 Mar 2023 05:55:06 +0100
Subject: [PATCH] Fix: normalize matrix before converting to euler

Without this, Blender aborts due to an assert.
---
 .../nodes/geometry/nodes/node_geo_input_instance_rotation.cc    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/blender/nodes/geometry/nodes/node_geo_input_instance_rotation.cc b/source/blender/nodes/geometry/nodes/node_geo_input_instance_rotation.cc
index c508814caa8..ab31ab3c218 100644
--- a/source/blender/nodes/geometry/nodes/node_geo_input_instance_rotation.cc
+++ b/source/blender/nodes/geometry/nodes/node_geo_input_instance_rotation.cc
@@ -22,7 +22,7 @@ class InstanceRotationFieldInput final : public bke::InstancesFieldInput {
   GVArray get_varray_for_context(const bke::Instances &instances, IndexMask /*mask*/) const final
   {
     auto rotation_fn = [&](const int i) -> float3 {
-      return float3(math::to_euler(instances.transforms()[i]));
+      return float3(math::to_euler(math::normalize(instances.transforms()[i])));
     };
 
     return VArray<float3>::ForFunc(instances.instances_num(), rotation_fn);