Fixed Timestep Interpolation: MultiMesh

Adds fixed timestep interpolation to multimeshes.

Co-authored-by: lawnjelly <lawnjelly@gmail.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/scene/3d/multimesh_instance_3d.cpp b/scene/3d/multimesh_instance_3d.cpp
index 55d6e49e6c..2eef1dbbf4 100644
--- a/scene/3d/multimesh_instance_3d.cpp
+++ b/scene/3d/multimesh_instance_3d.cpp
@@ -30,16 +30,35 @@
 
 #include "multimesh_instance_3d.h"
 
+void MultiMeshInstance3D::_refresh_interpolated() {
+	if (is_inside_tree() && multimesh.is_valid()) {
+		bool interpolated = is_physics_interpolated_and_enabled();
+		multimesh->set_physics_interpolated(interpolated);
+	}
+}
+
+void MultiMeshInstance3D::_physics_interpolated_changed() {
+	VisualInstance3D::_physics_interpolated_changed();
+	_refresh_interpolated();
+}
+
 void MultiMeshInstance3D::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_multimesh", "multimesh"), &MultiMeshInstance3D::set_multimesh);
 	ClassDB::bind_method(D_METHOD("get_multimesh"), &MultiMeshInstance3D::get_multimesh);
 	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "multimesh", PROPERTY_HINT_RESOURCE_TYPE, "MultiMesh"), "set_multimesh", "get_multimesh");
 }
 
+void MultiMeshInstance3D::_notification(int p_what) {
+	if (p_what == NOTIFICATION_ENTER_TREE) {
+		_refresh_interpolated();
+	}
+}
+
 void MultiMeshInstance3D::set_multimesh(const Ref<MultiMesh> &p_multimesh) {
 	multimesh = p_multimesh;
 	if (multimesh.is_valid()) {
 		set_base(multimesh->get_rid());
+		_refresh_interpolated();
 	} else {
 		set_base(RID());
 	}