input a parallelepiped: cube lx ly lz input a m-column: colu m r hz input a m-pyramid: pyra m r hz translation: tran n tx ty tz rotation: rota n axis ang scaling: scal n sx sy sz set a window: wind xwl ywl xwh ywh set a viewport: view xvl yvl xvh yvh set a viewpoint: eyep xv yv zv set a view reference point: refp xf yf zf perspective projection: proj display: disp (fn) quit: quit
n: object number（numbering in order of input sequences n = 1, 2, ... ） tx, ty, tz: translation toward x, y, z-axes axis: axis of rotation（x, y, z） ang: angle of rotation [degree] sx, sy, sz: scaling factors of x, y, z-axes xv, yv, zv: coordinates of a viewpoint xf, yf, zf: coordinates of a view reference point fn: output file name（line segment data）
