| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: makedist.c,v 2.4 2003/02/22 02:07:30 greg Exp $"; |
| 3 |
#endif |
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/* |
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* makedist.c - program to make a source distribution. |
| 6 |
* |
| 7 |
* 8/18/86 |
| 8 |
* |
| 9 |
* Program uses angular coordinates as follows: |
| 10 |
* |
| 11 |
* alpha - degrees measured from x1 axis. |
| 12 |
* beta - degress of projection into x2x3 plane, |
| 13 |
* measured from x2 axis towards x3 axis. |
| 14 |
* |
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* Default axes are (x1,x2,x3) = (x,y,z). |
| 16 |
*/ |
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|
| 18 |
#include <stdlib.h> |
| 19 |
#include <unistd.h> |
| 20 |
#include <stdio.h> |
| 21 |
#include <string.h> |
| 22 |
#include <sys/types.h> |
| 23 |
#include <sys/wait.h> |
| 24 |
|
| 25 |
#include "rtmath.h" |
| 26 |
#include "random.h" |
| 27 |
#include "setscan.h" |
| 28 |
|
| 29 |
#ifndef BSD |
| 30 |
#define vfork fork |
| 31 |
#endif |
| 32 |
|
| 33 |
#define atorad(a) ((PI/180.0) * (a)) |
| 34 |
|
| 35 |
char *rtargv[128] = {"rtrace", "-h"}; |
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int rtargc = 2; |
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|
| 38 |
#define passarg(s) (rtargv[rtargc++] = s) |
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|
| 40 |
ANGLE alpha[181] = {10, 25, 40, 55, 70, 85, AEND}; |
| 41 |
ANGLE beta[361] = {0,30,60,90,120,150,180,210,240,270,300,330,AEND}; |
| 42 |
|
| 43 |
/* coordinate system */ |
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double axis[3][3] = {{1,0,0},{0,1,0},{0,0,1}}; |
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|
| 46 |
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 */ |
| 51 |
int yres = 16; /* y sample resolution */ |
| 52 |
|
| 53 |
int userformat = 1; /* output 1=nice,0=plain,-1=raw */ |
| 54 |
int header = 1; /* print header? */ |
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|
| 56 |
char *progname; /* program name */ |
| 57 |
|
| 58 |
static void printargs(int ac, char **av, FILE *fp); |
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static void fixaxes(void); |
| 60 |
static int doscan(void); |
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static FILE * scanstart(void); |
| 62 |
static int scanend(FILE *fp); |
| 63 |
static void sendsamples(FILE *fp); |
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static void writesample(FILE *fp, ANGLE a, ANGLE b); |
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static double readsample(FILE *fp); |
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|
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|
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int |
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main( |
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int argc, |
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char *argv[] |
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) |
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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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|
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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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static void |
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printargs( /* 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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{ |
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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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static void |
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fixaxes(void) /* make sure axes are OK */ |
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{ |
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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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static int |
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doscan(void) /* 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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} |
| 291 |
|
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|
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static FILE * |
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scanstart(void) /* open scanner pipeline */ |
| 295 |
{ |
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int status; |
| 297 |
char *fgets(); |
| 298 |
int p1[2], p2[2]; |
| 299 |
int pid; |
| 300 |
FILE *fp; |
| 301 |
|
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fflush(stdout); /* empty output buffer */ |
| 303 |
if (pipe(p1) < 0) /* get pipe1 */ |
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goto err; |
| 305 |
if ((pid = fork()) == 0) { /* if child1 */ |
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close(p1[1]); |
| 307 |
if (p1[0] != 0) { /* connect pipe1 to stdin */ |
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dup2(p1[0], 0); |
| 309 |
close(p1[0]); |
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} |
| 311 |
if (userformat >= 0) { /* if processing output */ |
| 312 |
if (pipe(p2) < 0) /* get pipe2 */ |
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goto err; |
| 314 |
if ((pid = vfork()) == 0) { /* if child2 */ |
| 315 |
close(p2[0]); |
| 316 |
if (p2[1] != 1) { /* pipe2 to stdout */ |
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dup2(p2[1], 1); |
| 318 |
close(p2[1]); |
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} |
| 320 |
execvp(rtargv[0], rtargv); /* rtrace */ |
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goto err; |
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} |
| 323 |
if (pid == -1) |
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goto err; |
| 325 |
close(p2[1]); |
| 326 |
if ((fp = fdopen(p2[0], "r")) == NULL) |
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goto err; |
| 328 |
return(fp); |
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} else { /* if running raw */ |
| 330 |
execvp(rtargv[0], rtargv); /* rtrace */ |
| 331 |
goto err; |
| 332 |
} |
| 333 |
} |
| 334 |
if (pid == -1) |
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goto err; |
| 336 |
close(p1[0]); |
| 337 |
if ((fp = fdopen(p1[1], "w")) == NULL) |
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goto err; |
| 339 |
sendsamples(fp); /* parent writes output to pipe1 */ |
| 340 |
fclose(fp); |
| 341 |
if (wait(&status) != -1) /* wait for child1 */ |
| 342 |
_exit(status); |
| 343 |
err: |
| 344 |
perror(progname); |
| 345 |
_exit(1); |
| 346 |
} |
| 347 |
|
| 348 |
|
| 349 |
static int |
| 350 |
scanend( /* done with scanner input */ |
| 351 |
FILE *fp |
| 352 |
) |
| 353 |
{ |
| 354 |
int status; |
| 355 |
|
| 356 |
fclose(fp); |
| 357 |
if (wait(&status) == -1) { /* wait for child2 */ |
| 358 |
perror(progname); |
| 359 |
exit(1); |
| 360 |
} |
| 361 |
return(status ? -1 : 0); |
| 362 |
} |
| 363 |
|
| 364 |
|
| 365 |
static void |
| 366 |
sendsamples( /* send our samples to fp */ |
| 367 |
FILE *fp |
| 368 |
) |
| 369 |
{ |
| 370 |
ANGLE *a, *b; |
| 371 |
|
| 372 |
for (a = alpha; *a != AEND; a++) |
| 373 |
for (b = beta; *b != AEND; b++) |
| 374 |
writesample(fp, *a, *b); |
| 375 |
} |
| 376 |
|
| 377 |
|
| 378 |
static void |
| 379 |
writesample( /* write out sample ray grid */ |
| 380 |
FILE *fp, |
| 381 |
ANGLE a, |
| 382 |
ANGLE b |
| 383 |
) |
| 384 |
{ |
| 385 |
double sin(), cos(); |
| 386 |
float sp[6]; |
| 387 |
double dv[3]; |
| 388 |
double xpos, ypos; |
| 389 |
int i, j, k; |
| 390 |
/* get direction in their system */ |
| 391 |
dv[0] = -cos(atorad(a)); |
| 392 |
dv[1] = dv[2] = -sin(atorad(a)); |
| 393 |
dv[1] *= cos(atorad(b)); |
| 394 |
dv[2] *= sin(atorad(b)); |
| 395 |
/* do sample grid in our system */ |
| 396 |
for (j = 0; j < yres; j++) { |
| 397 |
for (i = 0; i < xres; i++) { |
| 398 |
xpos = ((i + frandom())/xres - 0.5) * targetw; |
| 399 |
ypos = ((j + frandom())/yres - 0.5) * targeth; |
| 400 |
for (k = 0; k < 3; k++) { |
| 401 |
sp[k] = targetp[k]; |
| 402 |
sp[k] += xpos*axis[2][k]; |
| 403 |
sp[k] += ypos*axis[1][k]; |
| 404 |
sp[k+3] = dv[0]*axis[0][k] + |
| 405 |
dv[1]*axis[1][k] + |
| 406 |
dv[2]*axis[2][k]; |
| 407 |
sp[k] -= sp[k+3]*targetd; |
| 408 |
} |
| 409 |
if (fwrite(sp, sizeof(*sp), 6, fp) != 6) { |
| 410 |
fprintf(stderr, "%s: data write error\n", |
| 411 |
progname); |
| 412 |
_exit(1); |
| 413 |
} |
| 414 |
} |
| 415 |
} |
| 416 |
} |
| 417 |
|
| 418 |
|
| 419 |
static double |
| 420 |
readsample( /* read in sample ray grid */ |
| 421 |
FILE *fp |
| 422 |
) |
| 423 |
{ |
| 424 |
float col[3]; |
| 425 |
double sum; |
| 426 |
int i; |
| 427 |
|
| 428 |
sum = 0.0; |
| 429 |
i = xres*yres; |
| 430 |
while (i--) { |
| 431 |
if (fread(col, sizeof(*col), 3, fp) != 3) { |
| 432 |
fprintf(stderr, "%s: data read error\n", progname); |
| 433 |
exit(1); |
| 434 |
} |
| 435 |
sum += .3*col[0] + .59*col[1] + .11*col[2]; |
| 436 |
} |
| 437 |
return(sum / (xres*yres)); |
| 438 |
} |
