glutwireoctahedron(3) centos man page | unix.com

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NAME
     glutWireOctahedron -- Draw a wireframe octahedron.

LIBRARY
     OpenGLUT - geometry

SYNOPSIS
     #include <openglut.h>

     void
     glutWireOctahedron(void);

DESCRIPTION
     This function draws a regular wireframe 8-sided polyhedron centered at the origin.  The vertices are at (+/-1, 0, 0), (0, +/-1, 0), (0, 0,
     +/-1).

CAVEATS
     We visit the same vertices the same number of times as for the solid octahedron, but the order is different.

     Draws every edge twice.

     The lines have normals, but the normals are from the facets, rather than upon the edge.  If you squint too hard, the lighting on a wireframe
     octahedron does not look quite right.

TODO
     It may be faster (and look better) to draw each edge once, setting the Normal at each edge.  (I don't think that this matters all that much,
     but a lineloop was proposed for the wire Cube for speed.)

SEE ALSO
     glutSolidOctahedron(3)

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