sh: src/shgetz.c Source File

00001 
00006 /*
00007  *  PROGRAM NAME:  sh
00008  *
00009  *  (c) COPYRIGHT INTERNATIONAL BUSINESS MACHINES
00010  *  CORPORATION 12/1/2001.  ALL RIGHTS RESERVED.
00011  *
00012  *  Please refer to the LICENSE file in the top directory
00013  *
00014  *      author: Mike Henderson mhender@watson.ibm.com
00015  */
00016 
00017 static char *id="@(#) $Id: shgetz.c,v 1.2 2006/08/17 19:28:17 mhender Exp $";
00018 
00019 #include <shInternal.h>
00020 
00028 void shgetz(int *ipix,int *jpix, float *zz)
00029  {
00030   int index;
00031  
00032 /*   Return the z-buffer. */
00033 
00034   *zz=0.;
00035   if(*ipix<0||*jpix<0)return;
00036   if(*ipix>=shIMax||*jpix>=shJMax)return;
00037 
00038   index=(*ipix)+shIMax*(*jpix);
00039 
00040   *zz=shZBuffer[index];
00041   return;
00042  }