gluDisk

gluDisk: man2/gluDisk.xml

gluDisk renders a disk on the = 0 plane. The disk has a radius of outer and contains a concentric circular hole with a radius of inner. If inner is 0, then no hole is generated. The disk is subdivided around the axis into slices (like pizza slices) and also about the axis into rings (as specified by slices and loops, respectively). With respect to orientation, the + side of the disk is considered to be `outside'' (see gluQuadricOrientation ). This means that if the orientation is set to GLU_OUTSIDE, then any normals generated point along the + axis. Otherwise, they point along the \- axis. If texturing has been turned on (with gluQuadricTexture ), texture coordinates are generated linearly such that where r = outer, the value at (, 0, 0) is (1, 0.5), at (0,, 0) it is (0.5, 1), at (\-, 0, 0) it is (0, 0.5), and at (0, \-, 0) it is (0.5, 0).