GLUSPHERE(3G) | GLUSPHERE(3G) |
If the orientation is set to GLU_OUTSIDE (with gluQuadricOrientation), then any normals generated point away from the center of the sphere. Otherwise, they point toward the center of the sphere.
If texturing is turned on (with gluQuadricTexture), then texture coordinates are generated so that t ranges from 0.0 at $ z ~=~ -^"radius" $ to 1.0 at $ z ~=~ "radius" $ ( t increases linearly along longitudinal lines), and s ranges from 0.0 at the +y axis, to 0.25 at the + x axis, to 0.5 at the - y axis, to 0.75 at the -x axis, and back to 1.0 at the + y axis.