Fix Skeleton3D regression when bones are not sorted from root to leaves

Tentative fix for missing bones when bones are not sorted as expected.
For example, if the root comes last, all child bones are removed and
the skeleton ends up with just the root.

1 files changed, 4 insertions, 1 deletions

diff --git a/scene/3d/skeleton_3d.cpp b/scene/3d/skeleton_3d.cpp
index 857916e23d..94fb49ae81 100644
--- a/scene/3d/skeleton_3d.cpp
+++ b/scene/3d/skeleton_3d.cpp
@@ -173,12 +173,15 @@ void Skeleton3D::_update_process_order() {
 	parentless_bones.clear();
 
 	for (int i = 0; i < len; i++) {
+		bonesptr[i].child_bones.clear();
+	}
+
+	for (int i = 0; i < len; i++) {
 		if (bonesptr[i].parent >= len) {
 			//validate this just in case
 			ERR_PRINT("Bone " + itos(i) + " has invalid parent: " + itos(bonesptr[i].parent));
 			bonesptr[i].parent = -1;
 		}
-		bonesptr[i].child_bones.clear();
 
 		if (bonesptr[i].parent != -1) {
 			int parent_bone_idx = bonesptr[i].parent;