Method transformByMatrix3

docs/app/js/sanddance-app.js:69118–69121

(matrix3)

        return this.check();
    }
    transformByMatrix3(matrix3) {
        _vec2.transformMat3(this, this, matrix3);
        return this.check();
    }
    transformByMatrix2x3(matrix2x3) {
        _vec2.transformMat2d(this, this, matrix2x3);
        return this.check();