Merge pull request #16659 from zeux/normquat

GLTFLoader: Fix handling of normalized animation outputs

examples/js/loaders/GLTFLoader.js

@@ -2869,12 +2869,52 @@ THREE.GLTFLoader = ( function () {
 
 				}
 
+				var outputArray = outputAccessor.array;
+
+				if ( outputAccessor.normalized ) {
+
+					var scale;
+
+					if ( outputArray.constructor === Int8Array ) {
+
+						scale = 1 / 127;
+
+					} else if ( outputArray.constructor === Uint8Array ) {
+
+						scale = 1 / 255;
+
+					} else if ( outputArray.constructor == Int16Array ) {
+
+						scale = 1 / 32767;
+
+					} else if ( outputArray.constructor === Uint16Array ) {
+
+						scale = 1 / 65535;
+
+					} else {
+
+						throw new Error( 'THREE.GLTFLoader: Unsupported output accessor component type.' );
+
+					}
+
+					var scaled = new Float32Array( outputArray.length );
+
+					for ( var j = 0, jl = outputArray.length; j < jl; j ++ ) {
+
+						scaled[j] = outputArray[j] * scale;
+
+					}
+
+					outputArray = scaled;
+
+				}
+
 				for ( var j = 0, jl = targetNames.length; j < jl; j ++ ) {
 
 					var track = new TypedKeyframeTrack(
 						targetNames[ j ] + '.' + PATH_PROPERTIES[ target.path ],
 						inputAccessor.array,
-						outputAccessor.array,
+						outputArray,
 						interpolation
 					);