gltf2 normalize normals and quaternions for export.

modules/gltf/gltf_document.cpp

@@ -2455,15 +2455,19 @@ Error GLTFDocument::_serialize_meshes(Ref<GLTFState> state) {
 								varr.write[blend_i] = Vector3(varr[blend_i]) - src_varr[blend_i];
 							}
 						}
-
-						t["POSITION"] = _encode_accessor_as_vec3(state, varr, true);
 					}
-
+					t["POSITION"] = _encode_accessor_as_vec3(state, varr, true);
 					Vector<Vector3> narr = array_morph[Mesh::ARRAY_NORMAL];
-					if (varr.size()) {
+					if (narr.size()) {
+						for (int i = 0; i < narr.size(); i++) {
+							narr.write[i] = Vector3(narr[i]).normalized();
+						}
 						t["NORMAL"] = _encode_accessor_as_vec3(state, narr, true);
 					}
 					Vector<real_t> tarr = array_morph[Mesh::ARRAY_TANGENT];
+					const int ret_size = tarr.size() / 4;
+					Vector<Vector3> attribs;
+					attribs.resize(ret_size);
 					if (tarr.size()) {
 						const int ret_size = tarr.size() / 4;
 						Vector<Vector3> attribs;
@@ -4690,6 +4694,9 @@ Error GLTFDocument::_serialize_animations(Ref<GLTFState> state) {
 				Vector<real_t> times = Variant(track.rotation_track.times);
 				s["input"] = _encode_accessor_as_floats(state, times, false);
 				Vector<Quaternion> values = track.rotation_track.values;
+				for (int i = 0; i < values.size(); i++) {
+					values.write[i].normalize();
+				}
 				s["output"] = _encode_accessor_as_quaternions(state, values, false);
 
 				samplers.push_back(s);