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/* Copyright (c) 1991 Regents of the University of California */
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#ifndef lint
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static char SCCSid[] = "$SunId$ LBL";
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#endif
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/*
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* makedist.c - program to make a source distribution.
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*
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* 8/18/86
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*
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* Program uses angular coordinates as follows:
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*
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* alpha - degrees measured from x1 axis.
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* beta - degress of projection into x2x3 plane,
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* measured from x2 axis towards x3 axis.
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*
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* Default axes are (x1,x2,x3) = (x,y,z).
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*/
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#include <stdio.h>
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#include "random.h"
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#include "setscan.h"
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#ifndef BSD
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#define vfork fork
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#endif
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#define FTINY 1e-7
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#define PI 3.14159265358979324
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#define atorad(a) ((PI/180.0) * (a))
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char *rtargv[128] = {"rtrace", "-h"};
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int rtargc = 2;
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#define passarg(s) (rtargv[rtargc++] = s)
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/* default angles */
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ANGLE alpha[181] = {10, 25, 40, 55, 70, 85, AEND};
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ANGLE beta[361] = {0,30,60,90,120,150,180,210,240,270,300,330,AEND};
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/* coordinate system */
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double axis[3][3] = {{1,0,0},{0,1,0},{0,0,1}};
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double targetw = 1.0; /* target width */
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double targeth = 1.0; /* target height */
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double targetd = 1.0; /* target distance */
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double targetp[3] = {0,0,0}; /* target center */
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int xres = 16; /* x sample resolution */
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int yres = 16; /* y sample resolution */
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int userformat = 1; /* output 1=nice,0=plain,-1=raw */
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int header = 1; /* print header? */
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char *progname; /* program name */
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main(argc, argv)
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int argc;
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char *argv[];
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{
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double atof();
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int i;
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progname = argv[0];
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for (i = 1; i < argc && argv[i][0] == '-'; i++)
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switch (argv[i][1]) {
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case 't': /* target */
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switch (argv[i][2]) {
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case 'w': /* width */
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targetw = atof(argv[++i]);
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break;
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case 'h': /* height */
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targeth = atof(argv[++i]);
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break;
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case 'd': /* distance */
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targetd = atof(argv[++i]);
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break;
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case 'c': /* center */
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targetp[0] = atof(argv[++i]);
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targetp[1] = atof(argv[++i]);
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targetp[2] = atof(argv[++i]);
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break;
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default:
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goto badopt;
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}
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break;
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case 'a':
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if (!strcmp(argv[i], "-alpha")) {
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if (setscan(alpha, argv[++i]) < 0) {
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fprintf(stderr,
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"%s: bad alpha spec: %s\n",
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progname, argv[i]);
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exit(1);
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}
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} else
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switch (argv[i][2]) {
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case 'd': /* ambient divisions */
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case 's': /* ambient samples */
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case 'r': /* ambient resolution */
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case 'a': /* ambient accuracy */
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case 'b': /* ambient bounces */
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case 'i': /* include */
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case 'e': /* exclude */
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case 'f': /* file */
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passarg(argv[i]);
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passarg(argv[++i]);
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break;
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case 'v': /* ambient value */
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passarg(argv[i]);
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passarg(argv[++i]);
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passarg(argv[++i]);
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passarg(argv[++i]);
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break;
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default:
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goto badopt;
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}
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break;
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case 'b':
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if (!strcmp(argv[i], "-beta")) {
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if (setscan(beta, argv[++i]) < 0) {
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fprintf(stderr,
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"%s: bad beta spec: %s\n",
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progname, argv[i]);
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exit(1);
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}
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} else
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goto badopt;
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break;
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case 'x':
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switch (argv[i][2]) {
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case '\0': /* x resolution */
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xres = atoi(argv[++i]);
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break;
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case '1':
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case '2': /* axis spec */
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case '3':
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axis[argv[i][2]-'1'][0] = atof(argv[i+1]);
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axis[argv[i][2]-'1'][1] = atof(argv[i+2]);
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axis[argv[i][2]-'1'][2] = atof(argv[i+3]);
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i += 3;
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break;
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default:
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goto badopt;
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}
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break;
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case 'y': /* y resolution */
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yres = atoi(argv[++i]);
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break;
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case 'l':
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switch (argv[i][2]) {
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case 'w': /* limit weight */
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case 'r': /* limit recursion */
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passarg(argv[i]);
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passarg(argv[++i]);
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break;
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default:
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goto badopt;
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}
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break;
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case 'u': /* user friendly format */
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userformat = 1;
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break;
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case 'o': /* custom format */
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passarg(argv[i]);
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userformat = -1;
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break;
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case 'd':
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switch (argv[i][2]) {
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case '\0': /* data format */
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userformat = 0;
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break;
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case 'j': /* direct jitter */
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case 't': /* direct threshold */
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case 'c': /* direct certainty */
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passarg(argv[i]);
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passarg(argv[++i]);
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break;
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default:
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goto badopt;
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}
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break;
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case 'h': /* no header */
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header = 0;
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break;
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default:;
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badopt:
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fprintf(stderr, "%s: bad option: %s\n",
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progname, argv[i]);
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exit(1);
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}
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if (userformat >= 0) { /* we cook */
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passarg("-ov");
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passarg("-fff");
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} else /* raw */
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passarg("-ffa");
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if (i != argc-1) {
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fprintf(stderr, "%s: single octree required\n", progname);
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exit(1);
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}
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passarg(argv[i]);
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passarg(NULL);
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fixaxes();
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if (header)
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if (userformat > 0)
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printf("Alpha\tBeta\tRadiance\n");
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else {
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printargs(argc, argv, stdout);
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putchar('\n');
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}
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if (doscan() == -1)
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exit(1);
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exit(0);
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}
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printargs(ac, av, fp) /* print arguments to a file */
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int ac;
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char **av;
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FILE *fp;
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{
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while (ac-- > 0) {
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fputs(*av++, fp);
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putc(' ', fp);
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}
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putc('\n', fp);
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}
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fixaxes() /* make sure axes are OK */
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{
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extern double normalize(), fdot();
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double d;
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register int i;
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for (i = 0; i < 3; i++)
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if (normalize(axis[i]) == 0.0)
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goto axerr;
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for (i = 0; i < 3; i++) {
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d = fdot(axis[i], axis[(i+1)%3]);
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if (d > FTINY || d < -FTINY)
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goto axerr;
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}
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return;
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axerr:
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fprintf(stderr, "%s: bad axis specification\n", progname);
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exit(1);
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}
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doscan() /* do scan for target */
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{
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FILE *fopen(), *scanstart();
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double readsample();
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FILE *fp;
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ANGLE *a, *b;
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fp = scanstart(); /* returns in child if not raw */
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for (a = alpha; *a != AEND; a++) /* read data */
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for (b = beta; *b != AEND; b++)
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if (userformat > 0)
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printf("%d\t%d\t%e\n", *a, *b, readsample(fp));
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else
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printf("%e\n", readsample(fp));
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return(scanend(fp));
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}
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FILE *
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scanstart() /* open scanner pipeline */
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{
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int status;
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char *fgets();
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int p1[2], p2[2];
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int pid;
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FILE *fp;
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fflush(stdout); /* empty output buffer */
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if (pipe(p1) < 0) /* get pipe1 */
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goto err;
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if ((pid = fork()) == 0) { /* if child1 */
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close(p1[1]);
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if (p1[0] != 0) { /* connect pipe1 to stdin */
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dup2(p1[0], 0);
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close(p1[0]);
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}
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if (userformat >= 0) { /* if processing output */
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if (pipe(p2) < 0) /* get pipe2 */
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goto err;
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if ((pid = vfork()) == 0) { /* if child2 */
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close(p2[0]);
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if (p2[1] != 1) { /* pipe2 to stdout */
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dup2(p2[1], 1);
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close(p2[1]);
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}
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execvp(rtargv[0], rtargv); /* rtrace */
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goto err;
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}
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if (pid == -1)
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goto err;
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close(p2[1]);
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if ((fp = fdopen(p2[0], "r")) == NULL)
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goto err;
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return(fp);
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} else { /* if running raw */
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execvp(rtargv[0], rtargv); /* rtrace */
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goto err;
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}
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}
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if (pid == -1)
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goto err;
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close(p1[0]);
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if ((fp = fdopen(p1[1], "w")) == NULL)
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goto err;
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sendsamples(fp); /* parent writes output to pipe1 */
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fclose(fp);
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if (wait(&status) != -1) /* wait for child1 */
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_exit(status);
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err:
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perror(progname);
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_exit(1);
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}
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scanend(fp) /* done with scanner input */
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FILE *fp;
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{
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int status;
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fclose(fp);
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if (wait(&status) == -1) { /* wait for child2 */
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perror(progname);
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exit(1);
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}
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return(status ? -1 : 0);
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}
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sendsamples(fp) /* send our samples to fp */
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FILE *fp;
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{
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ANGLE *a, *b;
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for (a = alpha; *a != AEND; a++)
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for (b = beta; *b != AEND; b++)
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writesample(fp, *a, *b);
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}
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writesample(fp, a, b) /* write out sample ray grid */
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FILE *fp;
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ANGLE a, b;
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{
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double sin(), cos();
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float sp[6];
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double dv[3];
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double xpos, ypos;
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int i, j, k;
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/* get direction in their system */
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dv[0] = -cos(atorad(a));
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dv[1] = dv[2] = -sin(atorad(a));
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dv[1] *= cos(atorad(b));
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dv[2] *= sin(atorad(b));
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/* do sample grid in our system */
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for (j = 0; j < yres; j++) {
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for (i = 0; i < xres; i++) {
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xpos = ((i + frandom())/xres - 0.5) * targetw;
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ypos = ((j + frandom())/yres - 0.5) * targeth;
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for (k = 0; k < 3; k++) {
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sp[k] = targetp[k];
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sp[k] += xpos*axis[2][k];
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sp[k] += ypos*axis[1][k];
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sp[k+3] = dv[0]*axis[0][k] +
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dv[1]*axis[1][k] +
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dv[2]*axis[2][k];
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sp[k] -= sp[k+3]*targetd;
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}
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| 391 |
if (fwrite(sp, sizeof(*sp), 6, fp) != 6) {
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| 392 |
fprintf(stderr, "%s: data write error\n",
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progname);
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_exit(1);
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}
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}
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}
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}
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double
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| 402 |
readsample(fp) /* read in sample ray grid */
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| 403 |
FILE *fp;
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| 404 |
{
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| 405 |
float col[3];
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| 406 |
double sum;
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| 407 |
int i;
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| 408 |
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| 409 |
sum = 0.0;
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| 410 |
i = xres*yres;
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| 411 |
while (i--) {
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| 412 |
if (fread(col, sizeof(*col), 3, fp) != 3) {
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| 413 |
fprintf(stderr, "%s: data read error\n", progname);
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| 414 |
exit(1);
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| 415 |
}
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| 416 |
sum += .3*col[0] + .59*col[1] + .11*col[2];
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}
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| 418 |
return(sum / (xres*yres));
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| 419 |
}
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