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<div> <font><font color="black" face="arial" size="2">Christian Hoffmann a écrit :</font></font><br>
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>this is more a mathematical
question. <br>
<br>
>I want to draw 3D-pictures with a horizontal x-axis, a vertical z-axis
and a diagonal y-axis. Assume ' viewport=1 2 3'. Which >value must have
viewangle for a horizontal x-axis? Is there a formula or is my wish
impossible? <br>
<br>
Hello,<br>
</font></font><br>
<font face="Arial, Helvetica, sans-serif">It is necessary (I think) to modify the matrix of current transformation (CTM) defined by TVZ in pst-3d. Here are some examples with a documentation in French (sorry) to obtain a representation in cavalier perspective and projections on plans XOY, XOZ and YOZ.<br>
Maybe you can adapt it to your example?<br>
<br>
http://manuel.luque.perso.neuf.fr/pst-projection/<br>
<br>
Best regards<br>
<br>
Manuel</font><br>
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