gethitcode() — Silicon Graphics
NAME
gethitcode − returns the current system hitcode
SPECIFICATION
C
long gethitcode()
FORTRAN
integer*4 function gethit()
Pascal
function gethitcode: longint;
DESCRIPTION
gethitcode returns the global variable hitcode, which keeps a cumulative record of clipping plane hits. It does not change the hitcode value.
The hitcode is a 6-bit number (see below), with one bit for each clipping plane. (Systems configured without near-far clipping return zeros (0s) for the near and far clipping planes.)
| 5 | 4 | 3 | 2 | 1 | 0 |
| far | near | top | bottom | right | left |
SEE ALSO
clearhitcode, pick, select IRIS Graphics Programming, Section 9.2, Picking
NOTE
This routine is available only in immediate mode.
Version 2.5r1 — October 29, 1986