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greg |
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/* Copyright (c) 1986 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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* lookamb.c - program to examine ambient components.
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*
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* 10/8/86
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*/
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#include <stdio.h>
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#include "color.h"
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typedef double FVECT[3];
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typedef struct ambval {
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FVECT pos; /* position in space */
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FVECT dir; /* normal direction */
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int lvl; /* recursion level of parent ray */
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float weight; /* weight of parent ray */
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COLOR val; /* computed ambient value */
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float rad; /* validity radius */
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struct ambval *next; /* next in list */
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} AMBVAL; /* ambient value */
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int dataonly = 0;
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int reverse = 0;
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AMBVAL av;
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main(argc, argv) /* load ambient values from a file */
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char *argv[];
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{
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FILE *fp;
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int i;
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for (i = 1; i < argc; i++)
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if (argv[i][0] == '-')
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switch (argv[i][1]) {
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case 'd':
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dataonly = 1;
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break;
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case 'r':
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reverse = 1;
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break;
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default:
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fprintf(stderr, "%s: unknown option '%s'\n",
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argv[0], argv[i]);
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return(1);
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}
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else
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break;
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if (i >= argc)
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fp = stdin;
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else if ((fp = fopen(argv[i], "r")) == NULL) {
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fprintf(stderr, "%s: file not found\n", argv[i]);
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return(1);
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}
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if (reverse)
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writamb(fp);
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else
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lookamb(fp);
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fclose(fp);
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return(0);
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}
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lookamb(fp) /* get ambient values from a file */
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FILE *fp;
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{
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while (fread(&av, sizeof(AMBVAL), 1, fp) == 1) {
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if (dataonly) {
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printf("%f\t%f\t%f\t", av.pos[0], av.pos[1], av.pos[2]);
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printf("%f\t%f\t%f\t", av.dir[0], av.dir[1], av.dir[2]);
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printf("%d\t%f\t%f\t", av.lvl, av.weight, av.rad);
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printf("%e\t%e\t%e\n", colval(av.val,RED),
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colval(av.val,GRN),
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colval(av.val,BLU));
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} else {
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printf("\nPosition:\t%f\t%f\t%f\n", av.pos[0],
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av.pos[1], av.pos[2]);
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printf("Direction:\t%f\t%f\t%f\n", av.dir[0],
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av.dir[1], av.dir[2]);
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printf("Lvl,Wt,Rad:\t%d\t\t%f\t%f\n", av.lvl,
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av.weight, av.rad);
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printf("Value:\t\t%e\t%e\t%e\n", colval(av.val,RED),
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colval(av.val,GRN), colval(av.val,BLU));
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}
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if (ferror(stdout))
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exit(1);
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}
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}
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writamb(fp) /* write binary ambient values */
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FILE *fp;
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{
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for ( ; ; ) {
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if (!dataonly)
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fscanf(fp, "%*s");
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if (fscanf(fp, "%lf %lf %lf",
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&av.pos[0], &av.pos[1], &av.pos[2]) != 3)
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return;
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if (!dataonly)
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fscanf(fp, "%*s");
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if (fscanf(fp, "%lf %lf %lf",
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&av.dir[0], &av.dir[1], &av.dir[2]) != 3)
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return;
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if (!dataonly)
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fscanf(fp, "%*s");
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if (fscanf(fp, "%d %f %f",
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&av.lvl, &av.weight, &av.rad) != 3)
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return;
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if (!dataonly)
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fscanf(fp, "%*s");
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if (fscanf(fp, "%f %f %f",
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&av.val[RED], &av.val[GRN], &av.val[BLU]) != 3)
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return;
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fwrite(&av, sizeof(AMBVAL), 1, stdout);
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if (ferror(stdout))
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exit(1);
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}
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}
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