InstancedMesh: add consistent return values to functions (#33059)

src/objects/InstancedMesh.js

@@ -213,10 +213,11 @@ class InstancedMesh extends Mesh {
 	 *
 	 * @param {number} index - The instance index.
 	 * @param {Color} color - The target object that is used to store the method's result.
+	 * @return {Color} A reference to the target color.
 	 */
 	getColorAt( index, color ) {
 
-		color.fromArray( this.instanceColor.array, index * 3 );
+		return color.fromArray( this.instanceColor.array, index * 3 );
 
 	}
 
@@ -225,10 +226,11 @@ class InstancedMesh extends Mesh {
 	 *
 	 * @param {number} index - The instance index.
 	 * @param {Matrix4} matrix - The target object that is used to store the method's result.
+	 * @return {Matrix4} A reference to the target matrix.
 	 */
 	getMatrixAt( index, matrix ) {
 
-		matrix.fromArray( this.instanceMatrix.array, index * 16 );
+		return matrix.fromArray( this.instanceMatrix.array, index * 16 );
 
 	}
 
@@ -314,6 +316,7 @@ class InstancedMesh extends Mesh {
 	 *
 	 * @param {number} index - The instance index.
 	 * @param {Color} color - The instance color.
+	 * @return {InstancedMesh} A reference to this instanced mesh.
 	 */
 	setColorAt( index, color ) {
 
@@ -324,6 +327,7 @@ class InstancedMesh extends Mesh {
 		}
 
 		color.toArray( this.instanceColor.array, index * 3 );
+		return this;
 
 	}
 
@@ -333,10 +337,12 @@ class InstancedMesh extends Mesh {
 	 *
 	 * @param {number} index - The instance index.
 	 * @param {Matrix4} matrix - The local transformation.
+	 * @return {InstancedMesh} A reference to this instanced mesh.
 	 */
 	setMatrixAt( index, matrix ) {
 
 		matrix.toArray( this.instanceMatrix.array, index * 16 );
+		return this;
 
 	}
 
@@ -347,6 +353,7 @@ class InstancedMesh extends Mesh {
 	 * @param {number} index - The instance index.
 	 * @param {Mesh} object -  A mesh which `morphTargetInfluences` property containing the morph target weights
 	 * of a single instance.
+	 * @return {InstancedMesh} A reference to this instanced mesh.
 	 */
 	setMorphAt( index, object ) {
 
@@ -377,6 +384,7 @@ class InstancedMesh extends Mesh {
 		array[ dataIndex ] = morphBaseInfluence;
 
 		array.set( objectInfluences, dataIndex + 1 );
+		return this;
 
 	}