dist/claygl.es.js
function(rad, axis) {
        mat4.rotate(this.array, this.array, rad, axis.array);
        this._dirty = true;
        return this;
    }
function(rad, axis) {
        mat4.rotate(this.array, this.array, rad, axis.array);
        this._dirty = true;
        return this;
    }
function ( rad , axis ) { mat4 . rotate ( this . array , this . array , rad , axis . array ) ; this . _dirty = true ; return this ; }
Rotate self by rad about axis.
Equal to right-multiply a rotaion matrix
@param  {number}   rad
@param  {clay.Vector3} axis
@return {clay.Matrix4}
Rotate self by rad about axis . Equal to right - multiply a rotaion matrix