Merge pull request #20804 from zach-capalbo/patch-1

GLTFExporter: Account for bind matrix.

examples/js/exporters/GLTFExporter.js

@@ -1693,12 +1693,15 @@ THREE.GLTFExporter.prototype = {
 
 			var joints = [];
 			var inverseBindMatrices = new Float32Array( skeleton.bones.length * 16 );
+			var temporaryBoneInverse = new THREE.Matrix4();
 
 			for ( var i = 0; i < skeleton.bones.length; ++ i ) {
 
 				joints.push( nodeMap.get( skeleton.bones[ i ] ) );
 
-				skeleton.boneInverses[ i ].toArray( inverseBindMatrices, i * 16 );
+				temporaryBoneInverse.copy( skeleton.boneInverses[ i ] );
+				
+				temporaryBoneInverse.multiply( object.bindMatrix ).toArray( inverseBindMatrices, i * 16 );
 
 			}
 

examples/jsm/exporters/GLTFExporter.js

@@ -9,6 +9,7 @@ import {
 	LinearMipmapLinearFilter,
 	LinearMipmapNearestFilter,
 	MathUtils,
+	Matrix4,
 	MirroredRepeatWrapping,
 	NearestFilter,
 	NearestMipmapLinearFilter,
@@ -178,7 +179,7 @@ GLTFExporter.prototype = {
 		/**
 		 * Is identity matrix
 		 *
-		 * @param {THREE.Matrix4} matrix
+		 * @param {Matrix4} matrix
 		 * @returns {Boolean} Returns true, if parameter is identity matrix
 		 */
 		function isIdentityMatrix( matrix ) {
@@ -1716,12 +1717,15 @@ GLTFExporter.prototype = {
 
 			var joints = [];
 			var inverseBindMatrices = new Float32Array( skeleton.bones.length * 16 );
+			var temporaryBoneInverse = new Matrix4();
 
 			for ( var i = 0; i < skeleton.bones.length; ++ i ) {
 
 				joints.push( nodeMap.get( skeleton.bones[ i ] ) );
 
-				skeleton.boneInverses[ i ].toArray( inverseBindMatrices, i * 16 );
+				temporaryBoneInverse.copy( skeleton.boneInverses[ i ] );
+				
+				temporaryBoneInverse.multiply( object.bindMatrix ).toArray( inverseBindMatrices, i * 16 );
 
 			}
 

utils/modularize.js

@@ -35,7 +35,7 @@ var files = [
 
 	{ path: 'exporters/ColladaExporter.js', dependencies: [], ignoreList: [] },
 	{ path: 'exporters/DRACOExporter.js', dependencies: [], ignoreList: [ 'Geometry' ] },
-	{ path: 'exporters/GLTFExporter.js', dependencies: [], ignoreList: [ 'AnimationClip', 'Camera', 'Geometry', 'Material', 'Mesh', 'Object3D', 'Scenes', 'ShaderMaterial', 'Matrix4' ] },
+	{ path: 'exporters/GLTFExporter.js', dependencies: [], ignoreList: [ 'AnimationClip', 'Camera', 'Geometry', 'Material', 'Mesh', 'Object3D', 'Scenes', 'ShaderMaterial'] },
 	{ path: 'exporters/MMDExporter.js', dependencies: [ { name: 'MMDParser', path: 'libs/mmdparser.module.js' } ], ignoreList: [] },
 	{ path: 'exporters/OBJExporter.js', dependencies: [], ignoreList: [] },
 	{ path: 'exporters/PLYExporter.js', dependencies: [], ignoreList: [] },