Method transform

docs/app/js/sanddance-app.js:69107–69109

(matrix4)

        return Math.atan2(this.x, this.y);
    }
    transform(matrix4) {
        return this.transformAsPoint(matrix4);
    }
    transformAsPoint(matrix4) {
        _vec2.transformMat4(this, this, matrix4);
        return this.check();