bot_smooth [-t angle_tolerance] new_bot old_botBOT_SMOOTH(nged)
NAME
bot_smooth - compute and store surface normals in a BOT mesh
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SYNOPSIS
DESCRIPTION
The bot_smooth command computes per-vertex surface normals for the BOT (Bag-of-Triangles) primitive named old_bot and stores the result as a new BOT named new_bot. The original object is not modified.
Normals are computed by averaging the normals of adjacent faces. The angle_tolerance controls when neighboring faces are treated as a sharp crease rather than a smooth surface: faces whose normals differ by more than the tolerance angle are not averaged together.
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Note
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This command requires the database to be at the current version with support for BOT surface normals. If the database is too old, use dbupgrade first.
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Options
- -t angle_tolerance
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Maximum angle (in degrees) between adjacent face normals for them to be averaged together. Faces separated by a larger angle produce a hard edge in the normal map. Default is
180.0(all faces smoothed together).
EXAMPLES
Example 1. Compute smooth normals for a BOT
mged> bot_smooth smooth_hull.bot hull.bot
Computes smooth surface normals for hull.bot (using the default 180° tolerance, smoothing all faces) and writes the result to smooth_hull.bot.
Example 2. Smooth with a crease angle for hard edges
mged> bot_smooth -t 60 smooth_part.bot rough_part.bot
Smooths rough_part.bot but preserves hard edges between faces whose normals differ by more than 60°.
SEE ALSO
bot_fuse(nged), bot_merge(nged)
AUTHOR
BRL-CAD Team
BUG REPORTS
Reports of bugs or problems should be submitted via electronic mail to devs@brlcad.org