let oMatrix = this.ballMesh.modelMatrix;
let matrix = new egret3d.Matrix4_4();
matrix.identity();
matrix.appendRotation(vangle * 60, axis);
oMatrix.multiply(matrix);
this.ballMesh.orientation.fromMatrix(oMatrix);
let oMatrix = this.ballMesh.modelMatrix;
let matrix = new egret3d.Matrix4_4();
matrix.identity();
matrix.appendRotation(vangle * 60, axis);
oMatrix.multiply(matrix);
this.ballMesh.orientation.fromMatrix(oMatrix);