Example 1:<br>
<pre>
Points in world coordinates
    10    10    30
   -10    10    30
   -10   -10    30
    10   -10    30
    10    10    50
   -10    10    50
   -10   -10    50
    10   -10    50

    
Corresponding points in "screen" coordinates
153.6275  190.5481
 38.2580  192.4459
 49.8636   82.3697
143.3775   82.8924
124.2550  153.7065
 70.0749  154.1861
 72.9463  100.7711
121.7682  100.8642

</pre>
<br><br>

Example 2:<br>
<pre>
Points in world coordinates
  X     Y     Z
 10    10    30
-20    10    30
-30   -10    30
 10   -10    30
 30    10    50
-10    10    50
-15   -10    50
 10   -10    50

Corresponding points in "screen" coordinates
  x     y
130   130
 40   130
 10    70
130    70
154   118
 82   118
 73    82
118    82
</pre>