<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div>Dear Herbert,</div><div>I have some problems with the following code: </div><div><br></div><div><div>\documentclass[11pt]{article}</div><div>\usepackage{pstricks}</div><div>\usepackage{pst-3dplot}</div><div>\usepackage{pst-solides3d}</div><div>\usepackage{pstricks-add, pst-plot, pst-func}</div><div>\begin{document}</div><div><br></div><div>\psset{unit=2.0}</div><div>\begin{pspicture}(-2,-2)(2,2)</div><div>\psset[pst-solides3d]{viewpoint=25 20 45 rtp2xyz,Decran=20,lightsrc=viewpoint}</div><div><br></div><div>\axesIIID[linecolor=blue](0,0,0)(4,5,4)</div><div><br></div><div>\psSolid[object=plan,definition=equation,</div><div> args={[1 2 -1 1]},</div><div>% args={[1 0 0 -1]},</div><div> fillcolor=blue!50,</div><div> base=-2.7 2.7 -4.0 3.5,%ngrid=30
30, </div><div> action=draw,name=Plane1%,showBase</div><div> ]</div><div> </div><div>\psSolid[object=plan,definition=equation,</div><div> args={[1 1 1 0]},</div><div> %args={[1 0 0 -1]},</div><div> fillcolor=blue!50,</div><div> plansection={[1 2 -1 1] [1 3 1 2]},</div><div> %base=-2 2 -2.5 2.5,%ngrid=30 30, </div><div> action=draw,name=Plane2, intersectioncolor=(bleu)%,showBase</div><div> ]</div><div> </div><div>\psSolid[object=plan,definition=equation,</div><div> args={[1 3 1 2]},</div><div>% args={[1 0 0 -1]},</div><div> fillcolor=blue!50,</div><div> base=-0.85 2.57 -4.7 2.5,%ngrid=30 30, </div><div> action=draw,name=Plane3%,showBase</div><div>
]</div><div><br></div><div>\end{pspicture}</div><div><br></div><div>\end{document}</div></div><div><br></div><div>It is an easy example of code concerning intersections between planes. The problems are:</div><div><br></div><div>1) how can I paint them with transparent colors (in order to see better the 3D) (my resulting pdf file is very ugly...)</div><div>2) how can I draw the intersection lines among them with different colors?</div><div><br></div><div>Could you help me?</div><div><br></div><div>Thanks!</div><div><br></div><div>Carlo</div><div><br></div><div> </div></div></body></html>