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/* Copyright (c) 1991 Regents of the University of California */ |
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|
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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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/* |
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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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|
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#include <stdio.h> |
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|
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#include "random.h" |
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|
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#include "setscan.h" |
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|
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#ifndef BSD |
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#define vfork fork |
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#endif |
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|
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#define FTINY 1e-7 |
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|
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#define PI 3.14159265358979324 |
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|
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#define atorad(a) ((PI/180.0) * (a)) |
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|
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char *rtargv[128] = {"rtrace", "-h"}; |
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int rtargc = 2; |
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|
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#define passarg(s) (rtargv[rtargc++] = s) |
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|
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#ifdef DCL_ATOF |
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extern double atof(); |
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#endif |
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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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|
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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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|
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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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|
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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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|
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char *progname; /* program name */ |
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|
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|
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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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int i; |
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|
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progname = argv[0]; |
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|
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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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|
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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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|
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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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|
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passarg(argv[i]); |
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passarg(NULL); |
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|
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fixaxes(); |
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|
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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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|
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if (doscan() == -1) |
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exit(1); |
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|
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exit(0); |
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} |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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if (fwrite(sp, sizeof(*sp), 6, fp) != 6) { |
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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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|
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|
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double |
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readsample(fp) /* read in sample ray grid */ |
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FILE *fp; |
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{ |
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float col[3]; |
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double sum; |
| 409 |
int i; |
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|
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sum = 0.0; |
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i = xres*yres; |
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while (i--) { |
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if (fread(col, sizeof(*col), 3, fp) != 3) { |
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fprintf(stderr, "%s: data read error\n", progname); |
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exit(1); |
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} |
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sum += .3*col[0] + .59*col[1] + .11*col[2]; |
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} |
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return(sum / (xres*yres)); |
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} |
