| 1 |
greg |
1.1 |
/* Copyright (c) 1991 Regents of the University of California */ |
| 2 |
|
|
|
| 3 |
|
|
#ifndef lint |
| 4 |
|
|
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
|
|
#endif |
| 6 |
|
|
|
| 7 |
|
|
/* |
| 8 |
|
|
* Circle sources in a displayed image. |
| 9 |
|
|
* |
| 10 |
|
|
* 18 Mar 1991 Greg Ward |
| 11 |
|
|
*/ |
| 12 |
|
|
|
| 13 |
|
|
#include "standard.h" |
| 14 |
|
|
#include "view.h" |
| 15 |
|
|
#include <X11/Xlib.h> |
| 16 |
|
|
#include <X11/Xutil.h> |
| 17 |
|
|
|
| 18 |
|
|
#define NSEG 30 /* number of segments per circle */ |
| 19 |
|
|
|
| 20 |
|
|
VIEW ourview = STDVIEW; /* view for picture */ |
| 21 |
|
|
int xres, yres; /* picture resolution */ |
| 22 |
|
|
|
| 23 |
|
|
char *progname; /* program name */ |
| 24 |
|
|
|
| 25 |
|
|
Display *theDisplay = NULL; /* connection to server */ |
| 26 |
|
|
|
| 27 |
|
|
#define rwind RootWindow(theDisplay,ourScreen) |
| 28 |
|
|
#define ourScreen DefaultScreen(theDisplay) |
| 29 |
|
|
|
| 30 |
|
|
GC vecGC; |
| 31 |
|
|
Window gwind; |
| 32 |
|
|
Cursor pickcursor; |
| 33 |
|
|
|
| 34 |
|
|
|
| 35 |
|
|
main(argc, argv) |
| 36 |
|
|
int argc; |
| 37 |
|
|
char *argv[]; |
| 38 |
|
|
{ |
| 39 |
|
|
FILE *fp; |
| 40 |
|
|
|
| 41 |
|
|
progname = argv[0]; |
| 42 |
|
|
if (argc < 2 || argc > 3) { |
| 43 |
|
|
fprintf(stderr, "Usage: %s picture [glaresrc]\n", |
| 44 |
|
|
progname); |
| 45 |
|
|
exit(1); |
| 46 |
|
|
} |
| 47 |
|
|
init(argv[1]); |
| 48 |
|
|
if (argc < 3) |
| 49 |
|
|
fp = stdin; |
| 50 |
|
|
else if ((fp = fopen(argv[2], "r")) == NULL) { |
| 51 |
|
|
fprintf(stderr, "%s: cannot open \"%s\"\n", |
| 52 |
|
|
progname, argv[2]); |
| 53 |
|
|
exit(1); |
| 54 |
|
|
} |
| 55 |
|
|
circle_sources(fp); |
| 56 |
|
|
exit(0); |
| 57 |
|
|
} |
| 58 |
|
|
|
| 59 |
|
|
|
| 60 |
|
|
init(name) /* set up vector drawing from pick */ |
| 61 |
|
|
char *name; |
| 62 |
|
|
{ |
| 63 |
greg |
1.5 |
extern Window xfindwind(); |
| 64 |
greg |
1.1 |
XWindowAttributes wa; |
| 65 |
|
|
XColor xc; |
| 66 |
|
|
XGCValues gcv; |
| 67 |
|
|
/* get the viewing parameters */ |
| 68 |
|
|
if (viewfile(name, &ourview, &xres, &yres) <= 0 || |
| 69 |
|
|
setview(&ourview) != NULL) { |
| 70 |
|
|
fprintf(stderr, "%s: cannot get view from \"%s\"\n", |
| 71 |
|
|
progname, name); |
| 72 |
|
|
exit(1); |
| 73 |
|
|
} |
| 74 |
|
|
/* open the display */ |
| 75 |
|
|
if ((theDisplay = XOpenDisplay(NULL)) == NULL) { |
| 76 |
|
|
fprintf(stderr, |
| 77 |
|
|
"%s: cannot open display; DISPLAY variable set?\n", |
| 78 |
|
|
progname); |
| 79 |
|
|
exit(1); |
| 80 |
|
|
} |
| 81 |
|
|
/* find our window */ |
| 82 |
greg |
1.5 |
gwind = xfindwind(theDisplay, rwind, name, 2); |
| 83 |
|
|
if (gwind == None) { |
| 84 |
|
|
fprintf(stderr, "%s: cannot find \"%s\" window\n", |
| 85 |
|
|
progname, name); |
| 86 |
greg |
1.6 |
exit(2); |
| 87 |
greg |
1.1 |
} |
| 88 |
greg |
1.5 |
XMapRaised(theDisplay, gwind); |
| 89 |
greg |
1.1 |
XGetWindowAttributes(theDisplay, gwind, &wa); |
| 90 |
|
|
sleep(4); |
| 91 |
|
|
if (wa.width != xres || wa.height != yres) { |
| 92 |
|
|
fprintf(stderr, |
| 93 |
|
|
"%s: warning -- window seems to be the wrong size!\n", |
| 94 |
|
|
progname); |
| 95 |
|
|
xres = wa.width; |
| 96 |
|
|
yres = wa.height; |
| 97 |
|
|
} |
| 98 |
|
|
/* set graphics context */ |
| 99 |
|
|
xc.red = 65535; xc.green = 0; xc.blue = 0; |
| 100 |
|
|
xc.flags = DoRed|DoGreen|DoBlue; |
| 101 |
|
|
if (XAllocColor(theDisplay, wa.colormap, &xc)) { |
| 102 |
|
|
gcv.foreground = xc.pixel; |
| 103 |
|
|
vecGC = XCreateGC(theDisplay,gwind,GCForeground,&gcv); |
| 104 |
|
|
} else { |
| 105 |
|
|
gcv.function = GXinvert; |
| 106 |
|
|
vecGC = XCreateGC(theDisplay,gwind,GCFunction,&gcv); |
| 107 |
|
|
} |
| 108 |
|
|
} |
| 109 |
|
|
|
| 110 |
|
|
|
| 111 |
|
|
circle_sources(fp) /* circle sources listed in fp */ |
| 112 |
|
|
FILE *fp; |
| 113 |
|
|
{ |
| 114 |
|
|
char linbuf[256]; |
| 115 |
|
|
int reading = 0; |
| 116 |
|
|
FVECT dir; |
| 117 |
|
|
double dom; |
| 118 |
|
|
|
| 119 |
|
|
while (fgets(linbuf, sizeof(linbuf), fp) != NULL) |
| 120 |
|
|
if (reading) { |
| 121 |
|
|
if (!strncmp(linbuf, "END", 3)) { |
| 122 |
|
|
XFlush(theDisplay); |
| 123 |
|
|
return; |
| 124 |
|
|
} |
| 125 |
|
|
if (sscanf(linbuf, "%lf %lf %lf %lf", |
| 126 |
|
|
&dir[0], &dir[1], &dir[2], |
| 127 |
|
|
&dom) != 4) |
| 128 |
|
|
break; |
| 129 |
|
|
circle(dir, dom); |
| 130 |
|
|
} else if (!strcmp(linbuf, "BEGIN glare source\n")) |
| 131 |
|
|
reading++; |
| 132 |
|
|
|
| 133 |
|
|
fprintf(stderr, "%s: error reading glare sources\n", progname); |
| 134 |
|
|
exit(1); |
| 135 |
|
|
} |
| 136 |
|
|
|
| 137 |
|
|
|
| 138 |
|
|
circle(dir, dom) /* indicate a solid angle on image */ |
| 139 |
|
|
FVECT dir; |
| 140 |
|
|
double dom; |
| 141 |
|
|
{ |
| 142 |
|
|
FVECT start, cur; |
| 143 |
|
|
XPoint pt[NSEG+1]; |
| 144 |
|
|
double px, py, pz; |
| 145 |
|
|
register int i; |
| 146 |
|
|
|
| 147 |
|
|
fcross(cur, dir, ourview.vup); |
| 148 |
|
|
if (normalize(cur) == 0.0) |
| 149 |
|
|
goto fail; |
| 150 |
|
|
spinvector(start, dir, cur, acos(1.-dom/(2.*PI))); |
| 151 |
|
|
for (i = 0; i <= NSEG; i++) { |
| 152 |
|
|
spinvector(cur, start, dir, 2.*PI*i/NSEG); |
| 153 |
|
|
cur[0] += ourview.vp[0]; |
| 154 |
|
|
cur[1] += ourview.vp[1]; |
| 155 |
|
|
cur[2] += ourview.vp[2]; |
| 156 |
|
|
viewpixel(&px, &py, &pz, &ourview, cur); |
| 157 |
|
|
if (pz <= 0.0) |
| 158 |
|
|
goto fail; |
| 159 |
|
|
pt[i].x = px*xres; |
| 160 |
greg |
1.2 |
pt[i].y = yres-1 - (int)(py*yres); |
| 161 |
greg |
1.1 |
} |
| 162 |
|
|
XDrawLines(theDisplay, gwind, vecGC, pt, NSEG+1, CoordModeOrigin); |
| 163 |
|
|
return; |
| 164 |
|
|
fail: |
| 165 |
|
|
fprintf(stderr, "%s: cannot draw source at (%f,%f,%f)\n", |
| 166 |
|
|
progname, dir[0], dir[1], dir[2]); |
| 167 |
|
|
} |
