public bool rect_to_quad(double x1, double y1, double x2, double y2, double[] q) { double[] r = new double[8]; r[0] = r[6] = x1; r[2] = r[4] = x2; r[1] = r[3] = y1; r[5] = r[7] = y2; return quad_to_quad(r, q); }