| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: xshowtrace.c,v 2.8 2003/06/27 06:53:22 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Display an image and watch the rays get traced. |
| 6 |
* |
| 7 |
* 9/21/90 Greg Ward |
| 8 |
*/ |
| 9 |
|
| 10 |
#include <X11/Xlib.h> |
| 11 |
|
| 12 |
#include "standard.h" |
| 13 |
#include "paths.h" |
| 14 |
#include "view.h" |
| 15 |
|
| 16 |
#define MAXDEPTH 32 /* ridiculous ray tree depth */ |
| 17 |
|
| 18 |
#ifdef SMLFLT |
| 19 |
#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3) |
| 20 |
#else |
| 21 |
#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3) |
| 22 |
#endif |
| 23 |
|
| 24 |
char rtcom[] = "rtrace -h- -otp -fa -x 1"; |
| 25 |
char xicom[] = "ximage -c 256"; |
| 26 |
|
| 27 |
VIEW ourview = STDVIEW; /* view for picture */ |
| 28 |
RESOLU ourres; /* picture resolution */ |
| 29 |
|
| 30 |
char *progname; /* program name */ |
| 31 |
|
| 32 |
char *picture; /* picture name */ |
| 33 |
|
| 34 |
FILE *pin; /* input stream */ |
| 35 |
|
| 36 |
Display *theDisplay = NULL; /* connection to server */ |
| 37 |
|
| 38 |
struct node { /* ray tree node */ |
| 39 |
int ipt[2]; |
| 40 |
struct node *sister; |
| 41 |
struct node *daughter; |
| 42 |
}; |
| 43 |
|
| 44 |
#define newnode() (struct node *)calloc(1, sizeof(struct node)) |
| 45 |
|
| 46 |
int slow = 0; /* slow trace? */ |
| 47 |
|
| 48 |
|
| 49 |
main(argc, argv) /* takes both the octree and the image */ |
| 50 |
int argc; |
| 51 |
char *argv[]; |
| 52 |
{ |
| 53 |
int i; |
| 54 |
char combuf[PATH_MAX]; |
| 55 |
|
| 56 |
progname = argv[0]; |
| 57 |
for (i = 1; i < argc-2; i++) |
| 58 |
if (!strcmp(argv[i], "-s")) |
| 59 |
slow++; |
| 60 |
else |
| 61 |
break; |
| 62 |
if (i > argc-2) { |
| 63 |
fprintf(stderr, "Usage: %s [-s] [rtrace args] octree picture\n", |
| 64 |
progname); |
| 65 |
exit(1); |
| 66 |
} |
| 67 |
picture = argv[argc-1]; |
| 68 |
/* get the viewing parameters */ |
| 69 |
if (viewfile(picture, &ourview, &ourres) <= 0 || |
| 70 |
setview(&ourview) != NULL) { |
| 71 |
fprintf(stderr, "%s: cannot get view from \"%s\"\n", |
| 72 |
progname, picture); |
| 73 |
exit(1); |
| 74 |
} |
| 75 |
/* open the display */ |
| 76 |
if ((theDisplay = XOpenDisplay(NULL)) == NULL) { |
| 77 |
fprintf(stderr, |
| 78 |
"%s: cannot open display; DISPLAY variable set?\n", |
| 79 |
progname); |
| 80 |
exit(1); |
| 81 |
} |
| 82 |
/* build input command */ |
| 83 |
sprintf(combuf, "%s \"%s\" | %s", xicom, picture, rtcom); |
| 84 |
for ( ; i < argc-1; i++) { |
| 85 |
strcat(combuf, " "); |
| 86 |
strcat(combuf, argv[i]); |
| 87 |
} |
| 88 |
/* start the damn thing */ |
| 89 |
if ((pin = popen(combuf, "r")) == NULL) |
| 90 |
exit(1); |
| 91 |
/* loop on input */ |
| 92 |
mainloop(); |
| 93 |
/* close pipe and exit */ |
| 94 |
pclose(pin); |
| 95 |
exit(0); |
| 96 |
} |
| 97 |
|
| 98 |
|
| 99 |
mainloop() /* get and process input */ |
| 100 |
{ |
| 101 |
static struct node *sis[MAXDEPTH]; |
| 102 |
register struct node *newp; |
| 103 |
char buf[128]; |
| 104 |
int level; |
| 105 |
register int i; |
| 106 |
|
| 107 |
level = 0; |
| 108 |
while (fgets(buf, sizeof(buf), pin) != NULL) { |
| 109 |
if ((newp = newnode()) == NULL) { |
| 110 |
fprintf(stderr, "%s: memory error\n", progname); |
| 111 |
return; |
| 112 |
} |
| 113 |
for (i = 0; buf[i] == '\t'; i++) |
| 114 |
; |
| 115 |
if (strtoipt(newp->ipt, buf+i) < 0) { |
| 116 |
fprintf(stderr, "%s: bad read\n", progname); |
| 117 |
return; |
| 118 |
} |
| 119 |
newp->sister = sis[i]; |
| 120 |
sis[i] = newp; |
| 121 |
if (i < level) { |
| 122 |
newp->daughter = sis[level]; |
| 123 |
sis[level] = NULL; |
| 124 |
} |
| 125 |
level = i; |
| 126 |
if (i == 0) { |
| 127 |
setvec(sis[0]->ipt); |
| 128 |
tracerays(sis[0]); |
| 129 |
freetree(sis[0]); |
| 130 |
sis[0] = NULL; |
| 131 |
if (!slow) |
| 132 |
XFlush(theDisplay); |
| 133 |
} |
| 134 |
} |
| 135 |
} |
| 136 |
|
| 137 |
|
| 138 |
freetree(tp) /* free a trace tree */ |
| 139 |
struct node *tp; |
| 140 |
{ |
| 141 |
register struct node *kid, *k2; |
| 142 |
|
| 143 |
for (kid = tp->daughter; kid != NULL; kid = k2) { |
| 144 |
k2 = kid->sister; |
| 145 |
freetree(kid); |
| 146 |
} |
| 147 |
free((void *)tp); |
| 148 |
} |
| 149 |
|
| 150 |
|
| 151 |
tracerays(tp) /* trace a ray tree */ |
| 152 |
struct node *tp; |
| 153 |
{ |
| 154 |
register struct node *kid; |
| 155 |
|
| 156 |
for (kid = tp->daughter; kid != NULL; kid = kid->sister) { |
| 157 |
vector(tp->ipt, kid->ipt); |
| 158 |
tracerays(kid); |
| 159 |
} |
| 160 |
} |
| 161 |
|
| 162 |
|
| 163 |
strtoipt(ipt, str) /* convert string x y z to image point */ |
| 164 |
int ipt[2]; |
| 165 |
char *str; |
| 166 |
{ |
| 167 |
FVECT im_pt, pt; |
| 168 |
|
| 169 |
if (!sscanvec(str, pt)) |
| 170 |
return(-1); |
| 171 |
if (DOT(pt,pt) <= FTINY) /* origin is really infinity */ |
| 172 |
ipt[0] = ipt[1] = -1; /* null vector */ |
| 173 |
else { |
| 174 |
viewloc(im_pt, &ourview, pt); |
| 175 |
loc2pix(ipt, &ourres, im_pt[0], im_pt[1]); |
| 176 |
} |
| 177 |
return(0); |
| 178 |
} |
| 179 |
|
| 180 |
|
| 181 |
#define rwind RootWindow(theDisplay,ourScreen) |
| 182 |
#define ourScreen DefaultScreen(theDisplay) |
| 183 |
|
| 184 |
GC vecGC = 0; |
| 185 |
Window gwind = 0; |
| 186 |
int xoff, yoff; |
| 187 |
|
| 188 |
|
| 189 |
setvec(ipt) /* set up vector drawing for pick */ |
| 190 |
int ipt[2]; |
| 191 |
{ |
| 192 |
extern Window xfindwind(); |
| 193 |
XWindowAttributes wa; |
| 194 |
XColor xc; |
| 195 |
XGCValues gcv; |
| 196 |
int rx, ry, wx, wy; |
| 197 |
Window rw, cw; |
| 198 |
unsigned int pm; |
| 199 |
/* compute pointer location */ |
| 200 |
if (gwind == 0) { |
| 201 |
register char *wn; |
| 202 |
for (wn = picture; *wn; wn++); |
| 203 |
while (wn > picture && wn[-1] != '/') wn--; |
| 204 |
if ((gwind = xfindwind(theDisplay, rwind, wn, 4)) == 0) { |
| 205 |
fprintf(stderr, "%s: cannot find display window!\n", |
| 206 |
progname); |
| 207 |
exit(1); |
| 208 |
} |
| 209 |
} |
| 210 |
XQueryPointer(theDisplay, gwind, &rw, &cw, &rx, &ry, &wx, &wy, &pm); |
| 211 |
xoff = wx - ipt[0]; |
| 212 |
yoff = wy - ipt[1]; |
| 213 |
/* set graphics context */ |
| 214 |
if (vecGC == 0) { |
| 215 |
XGetWindowAttributes(theDisplay, gwind, &wa); |
| 216 |
xc.red = 65535; xc.green = 0; xc.blue = 0; |
| 217 |
xc.flags = DoRed|DoGreen|DoBlue; |
| 218 |
if (XAllocColor(theDisplay, wa.colormap, &xc)) { |
| 219 |
gcv.foreground = xc.pixel; |
| 220 |
vecGC = XCreateGC(theDisplay,gwind,GCForeground,&gcv); |
| 221 |
} else { |
| 222 |
gcv.function = GXinvert; |
| 223 |
vecGC = XCreateGC(theDisplay,gwind,GCFunction,&gcv); |
| 224 |
} |
| 225 |
} |
| 226 |
} |
| 227 |
|
| 228 |
|
| 229 |
vector(ip1, ip2) /* draw a vector */ |
| 230 |
int ip1[2], ip2[2]; |
| 231 |
{ |
| 232 |
if (ip2[0] == -1 && ip2[1] == -1) |
| 233 |
return; /* null vector */ |
| 234 |
XDrawLine(theDisplay, gwind, vecGC, |
| 235 |
ip1[0]+xoff, ip1[1]+yoff, |
| 236 |
ip2[0]+xoff, ip2[1]+yoff); |
| 237 |
if (slow) { |
| 238 |
XFlush(theDisplay); |
| 239 |
sleep(1); |
| 240 |
} |
| 241 |
} |
