Particles: improve emitter when object is animated

2 files changed, 7 insertions, 1 deletions

diff --git a/source/blender/blenlib/BLI_float4x4.hh b/source/blender/blenlib/BLI_float4x4.hh
index 5698d06f05d..b4f12f17cc2 100644
--- a/source/blender/blenlib/BLI_float4x4.hh
+++ b/source/blender/blenlib/BLI_float4x4.hh
@@ -93,6 +93,11 @@ struct float4x4 {
     return result;
   }
 
+  float4x4 inverted_transposed_affine() const
+  {
+    return this->inverted_affine().transposed();
+  }
+
   struct float3x3_ref {
     const float4x4 &data;
 
diff --git a/source/blender/blenlib/BLI_multi_value_map.hh b/source/blender/blenlib/BLI_multi_value_map.hh
index ca7a369ed29..c20c4ef9677 100644
--- a/source/blender/blenlib/BLI_multi_value_map.hh
+++ b/source/blender/blenlib/BLI_multi_value_map.hh
@@ -22,7 +22,8 @@
  *
  * A `blender::MultiValueMap<Key, Value>` is an unordered associative container that stores
  * key-value pairs. It is different from `blender::Map` in that it can store multiple values for
- * the same key. The list of values that corresponds to a specific key can contain duplicates.
+ * the same key. The list of values that corresponds to a specific key can contain duplicates
+ * and their order is maintained.
  *
  * This data structure is different from a `std::multi_map`, because multi_map can store the same
  * key more than once and MultiValueMap can't.