is.scaleX = 1.0;
            this.scaleY = 1.0;
            this.scaleZ = 1.0;
            this.ambientStrength = 0.5;
            this.specularStrength = 0.8;
            this.materialShininess = 32;//反光度，即影响镜面高光的散射/半径
            this.opacity = 0.8;
            this.lightAmbient = [240, 240, 240, 1.0];
            this.lightDiffuse = [100, 100, 100, 1.0];
            this.lightSpecular = [20, 150, 200, 1.0];
        }
        var options = new Config();
        var gltflaye