| Written by | Marvin Simkin |
|---|---|
| Filename | drawbump.html |
| Last updated | April 5, 2005 |
| Filename | drawbump.pl |
| Author | Marvin Simkin |
| Program Created | 2005-01-10 |
| Last Updated | Jan 12 10:39 |
| Purpose | make a smooth surface rougher |
| syntax | drawbump.pl X Y Z < smooth.draw > bumpy.draw |
| X |
roughness for X dimensions, 0=no change to input X-roughness=1 would randomly adjust X values by some number between +1 and -1 |
| Y | roughness for Y dimensions, 0=no change to input |
| Z | roughness for Z dimensions, 0=no change to input |
| smooth.draw | draw instructions for a smooth object |
| bumpy.draw |
those same instructions but with points randomly moved to make the object look bumpier |
Sometimes a large flat polygon doesn't look that interesting or it is hard to see which way it is facing due to lighting etc. In combination with drawchop.pl, this can introduce some roughness to a flat surface. For example echo 'polygon: 0 0 0, 10 0 0, 10 10 0, 0 10 0' | drawchop.pl x=1+1 y=1+1 | drawbump.pl 0 0 1 | drawwrl.pl > bumpy.wrl drawchop.pl will cut the original polygon up into 100 polygons then drawbump.pl will tinker with the intersections a little raising or lowering the Z value from 0 to + or -1 so what started out to be one big flat surface now has some variety.
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