Merge pull request #19362 from donmccurdy/bug-propertybinding-without-morph-attribute-names

PropertyBinding: Use .morphTargetDictionary, not attribute.name...

src/animation/PropertyBinding.js

@@ -622,37 +622,17 @@ Object.assign( PropertyBinding.prototype, { // prototype, continued
 
 					}
 
-					for ( var i = 0; i < this.node.geometry.morphAttributes.position.length; i ++ ) {
+					if ( targetObject.morphTargetDictionary[ propertyIndex ] !== undefined ) {
 
-						if ( targetObject.geometry.morphAttributes.position[ i ].name === propertyIndex ) {
-
-							propertyIndex = i;
-							break;
-
-						}
+						propertyIndex = targetObject.morphTargetDictionary[ propertyIndex ];
 
 					}
 
 
 				} else {
 
-					if ( ! targetObject.geometry.morphTargets ) {
-
-						console.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.morphTargets.', this );
-						return;
-
-					}
-
-					for ( var i = 0; i < this.node.geometry.morphTargets.length; i ++ ) {
-
-						if ( targetObject.geometry.morphTargets[ i ].name === propertyIndex ) {
-
-							propertyIndex = i;
-							break;
-
-						}
-
-					}
+					console.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences on THREE.Geometry. Use THREE.BufferGeometry instead.', this );
+					return;
 
 				}