mainprogram@triangb1.f subroutine triangbk1 (nx, ny, u, p) Description: This program draws a plane by the triangular belt that it gives coordinate of point data and color. Input variable: nx : Data number of the x direction ny : Data number of the y direction u : Color (r, g, b) of the point is given in the order p : The coordinate of the point (x, y, z) is given in the order Drawing example: triangb1.wrl