| 1 |
– |
/* Copyright (c) 1986 Regents of the University of California */ |
| 2 |
– |
|
| 1 |
|
#ifndef lint |
| 2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
| 2 |
> |
static const char RCSid[] = "$Id$"; |
| 3 |
|
#endif |
| 6 |
– |
|
| 4 |
|
/* |
| 5 |
|
* image.c - routines for image generation. |
| 6 |
|
* |
| 7 |
< |
* 10/17/85 |
| 7 |
> |
* External symbols declared in view.h |
| 8 |
|
*/ |
| 9 |
|
|
| 10 |
< |
#include "standard.h" |
| 10 |
> |
#include "copyright.h" |
| 11 |
|
|
| 12 |
+ |
#include "rtio.h" |
| 13 |
+ |
#include "rtmath.h" |
| 14 |
+ |
#include "paths.h" |
| 15 |
|
#include "view.h" |
| 16 |
|
|
| 17 |
– |
VIEW stdview = STDVIEW(512); /* default view parameters */ |
| 17 |
|
|
| 18 |
+ |
#define FEQ(x,y) (fabs((x)-(y)) <= FTINY) |
| 19 |
+ |
#define VEQ(v,w) (FEQ((v)[0],(w)[0]) && FEQ((v)[1],(w)[1]) \ |
| 20 |
+ |
&& FEQ((v)[2],(w)[2])) |
| 21 |
|
|
| 22 |
+ |
VIEW stdview = STDVIEW; /* default view parameters */ |
| 23 |
+ |
|
| 24 |
+ |
static gethfunc gethview; |
| 25 |
+ |
|
| 26 |
+ |
|
| 27 |
|
char * |
| 28 |
< |
setview(v) /* set vhinc and vvinc, return message on error */ |
| 28 |
> |
setview(v) /* set hvec and vvec, return message on error */ |
| 29 |
|
register VIEW *v; |
| 30 |
|
{ |
| 31 |
< |
double tan(), dt; |
| 31 |
> |
static char ill_horiz[] = "illegal horizontal view size"; |
| 32 |
> |
static char ill_vert[] = "illegal vertical view size"; |
| 33 |
|
|
| 34 |
< |
if (normalize(v->vdir) == 0.0) /* normalize direction */ |
| 34 |
> |
if (v->vaft < -FTINY || (v->vaft > FTINY && v->vaft <= v->vfore)) |
| 35 |
> |
return("illegal fore/aft clipping plane"); |
| 36 |
> |
|
| 37 |
> |
v->vdist *= normalize(v->vdir); /* normalize direction */ |
| 38 |
> |
if (v->vdist == 0.0) |
| 39 |
|
return("zero view direction"); |
| 28 |
– |
|
| 29 |
– |
fcross(v->vhinc, v->vdir, v->vup); /* compute horiz dir */ |
| 40 |
|
|
| 41 |
< |
if (normalize(v->vhinc) == 0.0) |
| 42 |
< |
return("illegal view up vector"); |
| 33 |
< |
|
| 34 |
< |
fcross(v->vvinc, v->vhinc, v->vdir); /* compute vert dir */ |
| 41 |
> |
if (normalize(v->vup) == 0.0) /* normalize view up */ |
| 42 |
> |
return("zero view up vector"); |
| 43 |
|
|
| 44 |
< |
if (v->type == VT_PAR) |
| 37 |
< |
dt = v->horiz; |
| 38 |
< |
else if (v->type == VT_PER) |
| 39 |
< |
dt = 2.0 * tan(v->horiz*(PI/180.0/2.0)); |
| 40 |
< |
else |
| 41 |
< |
return("unknown view type"); |
| 44 |
> |
fcross(v->hvec, v->vdir, v->vup); /* compute horiz dir */ |
| 45 |
|
|
| 46 |
< |
if (dt <= FTINY || dt >= FHUGE) |
| 47 |
< |
return("illegal horizontal view size"); |
| 46 |
> |
if (normalize(v->hvec) == 0.0) |
| 47 |
> |
return("view up parallel to view direction"); |
| 48 |
|
|
| 49 |
< |
if (v->hresolu <= 0) |
| 47 |
< |
return("illegal horizontal resolution"); |
| 49 |
> |
fcross(v->vvec, v->hvec, v->vdir); /* compute vert dir */ |
| 50 |
|
|
| 51 |
< |
dt /= (double)v->hresolu; |
| 52 |
< |
v->vhinc[0] *= dt; |
| 53 |
< |
v->vhinc[1] *= dt; |
| 54 |
< |
v->vhinc[2] *= dt; |
| 51 |
> |
if (v->horiz <= FTINY) |
| 52 |
> |
return(ill_horiz); |
| 53 |
> |
if (v->vert <= FTINY) |
| 54 |
> |
return(ill_vert); |
| 55 |
|
|
| 56 |
< |
if (v->type == VT_PAR) |
| 57 |
< |
dt = v->vert; |
| 58 |
< |
else |
| 59 |
< |
dt = 2.0 * tan(v->vert*(PI/180.0/2.0)); |
| 56 |
> |
switch (v->type) { |
| 57 |
> |
case VT_PAR: /* parallel view */ |
| 58 |
> |
v->hn2 = v->horiz; |
| 59 |
> |
v->vn2 = v->vert; |
| 60 |
> |
break; |
| 61 |
> |
case VT_PER: /* perspective view */ |
| 62 |
> |
if (v->horiz >= 180.0-FTINY) |
| 63 |
> |
return(ill_horiz); |
| 64 |
> |
if (v->vert >= 180.0-FTINY) |
| 65 |
> |
return(ill_vert); |
| 66 |
> |
v->hn2 = 2.0 * tan(v->horiz*(PI/180.0/2.0)); |
| 67 |
> |
v->vn2 = 2.0 * tan(v->vert*(PI/180.0/2.0)); |
| 68 |
> |
break; |
| 69 |
> |
case VT_CYL: /* cylindrical panorama */ |
| 70 |
> |
if (v->horiz > 360.0+FTINY) |
| 71 |
> |
return(ill_horiz); |
| 72 |
> |
if (v->vert >= 180.0-FTINY) |
| 73 |
> |
return(ill_vert); |
| 74 |
> |
v->hn2 = v->horiz * (PI/180.0); |
| 75 |
> |
v->vn2 = 2.0 * tan(v->vert*(PI/180.0/2.0)); |
| 76 |
> |
break; |
| 77 |
> |
case VT_ANG: /* angular fisheye */ |
| 78 |
> |
if (v->horiz > 360.0+FTINY) |
| 79 |
> |
return(ill_horiz); |
| 80 |
> |
if (v->vert > 360.0+FTINY) |
| 81 |
> |
return(ill_vert); |
| 82 |
> |
v->hn2 = v->horiz * (PI/180.0); |
| 83 |
> |
v->vn2 = v->vert * (PI/180.0); |
| 84 |
> |
break; |
| 85 |
> |
case VT_HEM: /* hemispherical fisheye */ |
| 86 |
> |
if (v->horiz > 180.0+FTINY) |
| 87 |
> |
return(ill_horiz); |
| 88 |
> |
if (v->vert > 180.0+FTINY) |
| 89 |
> |
return(ill_vert); |
| 90 |
> |
v->hn2 = 2.0 * sin(v->horiz*(PI/180.0/2.0)); |
| 91 |
> |
v->vn2 = 2.0 * sin(v->vert*(PI/180.0/2.0)); |
| 92 |
> |
break; |
| 93 |
> |
default: |
| 94 |
> |
return("unknown view type"); |
| 95 |
> |
} |
| 96 |
> |
if (v->type != VT_ANG) { |
| 97 |
> |
if (v->type != VT_CYL) { |
| 98 |
> |
v->hvec[0] *= v->hn2; |
| 99 |
> |
v->hvec[1] *= v->hn2; |
| 100 |
> |
v->hvec[2] *= v->hn2; |
| 101 |
> |
} |
| 102 |
> |
v->vvec[0] *= v->vn2; |
| 103 |
> |
v->vvec[1] *= v->vn2; |
| 104 |
> |
v->vvec[2] *= v->vn2; |
| 105 |
> |
} |
| 106 |
> |
v->hn2 *= v->hn2; |
| 107 |
> |
v->vn2 *= v->vn2; |
| 108 |
|
|
| 109 |
< |
if (dt <= FTINY || dt >= FHUGE) |
| 110 |
< |
return("illegal vertical view size"); |
| 109 |
> |
return(NULL); |
| 110 |
> |
} |
| 111 |
|
|
| 62 |
– |
if (v->vresolu <= 0) |
| 63 |
– |
return("illegal vertical resolution"); |
| 64 |
– |
|
| 65 |
– |
dt /= (double)v->vresolu; |
| 66 |
– |
v->vvinc[0] *= dt; |
| 67 |
– |
v->vvinc[1] *= dt; |
| 68 |
– |
v->vvinc[2] *= dt; |
| 112 |
|
|
| 113 |
< |
return(NULL); |
| 113 |
> |
void |
| 114 |
> |
normaspect(va, ap, xp, yp) /* fix pixel aspect or resolution */ |
| 115 |
> |
double va; /* view aspect ratio */ |
| 116 |
> |
double *ap; /* pixel aspect in (or out if 0) */ |
| 117 |
> |
int *xp, *yp; /* x and y resolution in (or out if *ap!=0) */ |
| 118 |
> |
{ |
| 119 |
> |
if (*ap <= FTINY) |
| 120 |
> |
*ap = va * *xp / *yp; /* compute pixel aspect */ |
| 121 |
> |
else if (va * *xp > *ap * *yp) |
| 122 |
> |
*xp = *yp / va * *ap + .5; /* reduce x resolution */ |
| 123 |
> |
else |
| 124 |
> |
*yp = *xp * va / *ap + .5; /* reduce y resolution */ |
| 125 |
|
} |
| 126 |
|
|
| 127 |
|
|
| 128 |
< |
rayview(orig, direc, v, x, y) /* compute ray origin and direction */ |
| 128 |
> |
double |
| 129 |
> |
viewray(orig, direc, v, x, y) /* compute ray origin and direction */ |
| 130 |
|
FVECT orig, direc; |
| 131 |
|
register VIEW *v; |
| 132 |
|
double x, y; |
| 133 |
|
{ |
| 134 |
< |
register int i; |
| 134 |
> |
double d, z; |
| 135 |
> |
|
| 136 |
> |
x += v->hoff - 0.5; |
| 137 |
> |
y += v->voff - 0.5; |
| 138 |
|
|
| 139 |
< |
x -= 0.5 * v->hresolu; |
| 140 |
< |
y -= 0.5 * v->vresolu; |
| 141 |
< |
|
| 142 |
< |
if (v->type == VT_PAR) { /* parallel view */ |
| 143 |
< |
for (i = 0; i < 3; i++) |
| 144 |
< |
orig[i] = v->vp[i] + x*v->vhinc[i] + y*v->vvinc[i]; |
| 139 |
> |
switch(v->type) { |
| 140 |
> |
case VT_PAR: /* parallel view */ |
| 141 |
> |
orig[0] = v->vp[0] + v->vfore*v->vdir[0] |
| 142 |
> |
+ x*v->hvec[0] + y*v->vvec[0]; |
| 143 |
> |
orig[1] = v->vp[1] + v->vfore*v->vdir[1] |
| 144 |
> |
+ x*v->hvec[1] + y*v->vvec[1]; |
| 145 |
> |
orig[2] = v->vp[2] + v->vfore*v->vdir[2] |
| 146 |
> |
+ x*v->hvec[2] + y*v->vvec[2]; |
| 147 |
|
VCOPY(direc, v->vdir); |
| 148 |
< |
} else { /* perspective view */ |
| 149 |
< |
VCOPY(orig, v->vp); |
| 150 |
< |
for (i = 0; i < 3; i++) |
| 151 |
< |
direc[i] = v->vdir[i] + x*v->vhinc[i] + y*v->vvinc[i]; |
| 152 |
< |
normalize(direc); |
| 148 |
> |
return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
| 149 |
> |
case VT_PER: /* perspective view */ |
| 150 |
> |
direc[0] = v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
| 151 |
> |
direc[1] = v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
| 152 |
> |
direc[2] = v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
| 153 |
> |
orig[0] = v->vp[0] + v->vfore*direc[0]; |
| 154 |
> |
orig[1] = v->vp[1] + v->vfore*direc[1]; |
| 155 |
> |
orig[2] = v->vp[2] + v->vfore*direc[2]; |
| 156 |
> |
d = normalize(direc); |
| 157 |
> |
return(v->vaft > FTINY ? (v->vaft - v->vfore)*d : 0.0); |
| 158 |
> |
case VT_HEM: /* hemispherical fisheye */ |
| 159 |
> |
z = 1.0 - x*x*v->hn2 - y*y*v->vn2; |
| 160 |
> |
if (z < 0.0) |
| 161 |
> |
return(-1.0); |
| 162 |
> |
z = sqrt(z); |
| 163 |
> |
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
| 164 |
> |
direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
| 165 |
> |
direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
| 166 |
> |
orig[0] = v->vp[0] + v->vfore*direc[0]; |
| 167 |
> |
orig[1] = v->vp[1] + v->vfore*direc[1]; |
| 168 |
> |
orig[2] = v->vp[2] + v->vfore*direc[2]; |
| 169 |
> |
return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
| 170 |
> |
case VT_CYL: /* cylindrical panorama */ |
| 171 |
> |
d = x * v->horiz * (PI/180.0); |
| 172 |
> |
z = cos(d); |
| 173 |
> |
x = sin(d); |
| 174 |
> |
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
| 175 |
> |
direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
| 176 |
> |
direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
| 177 |
> |
orig[0] = v->vp[0] + v->vfore*direc[0]; |
| 178 |
> |
orig[1] = v->vp[1] + v->vfore*direc[1]; |
| 179 |
> |
orig[2] = v->vp[2] + v->vfore*direc[2]; |
| 180 |
> |
d = normalize(direc); |
| 181 |
> |
return(v->vaft > FTINY ? (v->vaft - v->vfore)*d : 0.0); |
| 182 |
> |
case VT_ANG: /* angular fisheye */ |
| 183 |
> |
x *= v->horiz/180.0; |
| 184 |
> |
y *= v->vert/180.0; |
| 185 |
> |
d = x*x + y*y; |
| 186 |
> |
if (d > 1.0) |
| 187 |
> |
return(-1.0); |
| 188 |
> |
d = sqrt(d); |
| 189 |
> |
z = cos(PI*d); |
| 190 |
> |
d = d <= FTINY ? PI : sqrt(1 - z*z)/d; |
| 191 |
> |
x *= d; |
| 192 |
> |
y *= d; |
| 193 |
> |
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
| 194 |
> |
direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
| 195 |
> |
direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
| 196 |
> |
orig[0] = v->vp[0] + v->vfore*direc[0]; |
| 197 |
> |
orig[1] = v->vp[1] + v->vfore*direc[1]; |
| 198 |
> |
orig[2] = v->vp[2] + v->vfore*direc[2]; |
| 199 |
> |
return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
| 200 |
|
} |
| 201 |
+ |
return(-1.0); |
| 202 |
|
} |
| 203 |
|
|
| 204 |
|
|
| 205 |
< |
sscanview(vp, s) /* get view parameters */ |
| 206 |
< |
register VIEW *vp; |
| 207 |
< |
register char *s; |
| 205 |
> |
void |
| 206 |
> |
viewloc(ip, v, p) /* find image location for point */ |
| 207 |
> |
FVECT ip; |
| 208 |
> |
register VIEW *v; |
| 209 |
> |
FVECT p; |
| 210 |
|
{ |
| 211 |
< |
for ( ; ; ) |
| 212 |
< |
switch (*s++) { |
| 213 |
< |
case '\0': |
| 214 |
< |
case '\n': |
| 215 |
< |
return(0); |
| 216 |
< |
case '-': |
| 217 |
< |
switch (*s++) { |
| 218 |
< |
case '\0': |
| 219 |
< |
return(-1); |
| 220 |
< |
case 'x': |
| 221 |
< |
if (sscanf(s, "%d", &vp->hresolu) != 1) |
| 222 |
< |
return(-1); |
| 223 |
< |
s = sskip(s); |
| 224 |
< |
continue; |
| 225 |
< |
case 'y': |
| 226 |
< |
if (sscanf(s, "%d", &vp->vresolu) != 1) |
| 227 |
< |
return(-1); |
| 118 |
< |
s = sskip(s); |
| 119 |
< |
continue; |
| 120 |
< |
case 'v': |
| 121 |
< |
switch (*s++) { |
| 122 |
< |
case '\0': |
| 123 |
< |
return(-1); |
| 124 |
< |
case 't': |
| 125 |
< |
vp->type = *s++; |
| 126 |
< |
continue; |
| 127 |
< |
case 'p': |
| 128 |
< |
if (sscanf(s, "%lf %lf %lf", |
| 129 |
< |
&vp->vp[0], |
| 130 |
< |
&vp->vp[1], |
| 131 |
< |
&vp->vp[2]) != 3) |
| 132 |
< |
return(-1); |
| 133 |
< |
s = sskip(sskip(sskip(s))); |
| 134 |
< |
continue; |
| 135 |
< |
case 'd': |
| 136 |
< |
if (sscanf(s, "%lf %lf %lf", |
| 137 |
< |
&vp->vdir[0], |
| 138 |
< |
&vp->vdir[1], |
| 139 |
< |
&vp->vdir[2]) != 3) |
| 140 |
< |
return(-1); |
| 141 |
< |
s = sskip(sskip(sskip(s))); |
| 142 |
< |
continue; |
| 143 |
< |
case 'u': |
| 144 |
< |
if (sscanf(s, "%lf %lf %lf", |
| 145 |
< |
&vp->vup[0], |
| 146 |
< |
&vp->vup[1], |
| 147 |
< |
&vp->vup[2]) != 3) |
| 148 |
< |
return(-1); |
| 149 |
< |
s = sskip(sskip(sskip(s))); |
| 150 |
< |
continue; |
| 151 |
< |
case 'h': |
| 152 |
< |
if (sscanf(s, "%lf", |
| 153 |
< |
&vp->horiz) != 1) |
| 154 |
< |
return(-1); |
| 155 |
< |
s = sskip(s); |
| 156 |
< |
continue; |
| 157 |
< |
case 'v': |
| 158 |
< |
if (sscanf(s, "%lf", |
| 159 |
< |
&vp->vert) != 1) |
| 160 |
< |
return(-1); |
| 161 |
< |
s = sskip(s); |
| 162 |
< |
continue; |
| 163 |
< |
} |
| 164 |
< |
continue; |
| 165 |
< |
} |
| 166 |
< |
continue; |
| 211 |
> |
double d, d2; |
| 212 |
> |
FVECT disp; |
| 213 |
> |
|
| 214 |
> |
disp[0] = p[0] - v->vp[0]; |
| 215 |
> |
disp[1] = p[1] - v->vp[1]; |
| 216 |
> |
disp[2] = p[2] - v->vp[2]; |
| 217 |
> |
|
| 218 |
> |
switch (v->type) { |
| 219 |
> |
case VT_PAR: /* parallel view */ |
| 220 |
> |
ip[2] = DOT(disp,v->vdir) - v->vfore; |
| 221 |
> |
break; |
| 222 |
> |
case VT_PER: /* perspective view */ |
| 223 |
> |
d = DOT(disp,v->vdir); |
| 224 |
> |
ip[2] = VLEN(disp); |
| 225 |
> |
if (d < 0.0) { /* fold pyramid */ |
| 226 |
> |
ip[2] = -ip[2]; |
| 227 |
> |
d = -d; |
| 228 |
|
} |
| 229 |
+ |
if (d > FTINY) { |
| 230 |
+ |
d = 1.0/d; |
| 231 |
+ |
disp[0] *= d; |
| 232 |
+ |
disp[1] *= d; |
| 233 |
+ |
disp[2] *= d; |
| 234 |
+ |
} |
| 235 |
+ |
ip[2] *= (1.0 - v->vfore*d); |
| 236 |
+ |
break; |
| 237 |
+ |
case VT_HEM: /* hemispherical fisheye */ |
| 238 |
+ |
d = normalize(disp); |
| 239 |
+ |
if (DOT(disp,v->vdir) < 0.0) |
| 240 |
+ |
ip[2] = -d; |
| 241 |
+ |
else |
| 242 |
+ |
ip[2] = d; |
| 243 |
+ |
ip[2] -= v->vfore; |
| 244 |
+ |
break; |
| 245 |
+ |
case VT_CYL: /* cylindrical panorama */ |
| 246 |
+ |
d = DOT(disp,v->hvec); |
| 247 |
+ |
d2 = DOT(disp,v->vdir); |
| 248 |
+ |
ip[0] = 180.0/PI * atan2(d,d2) / v->horiz + 0.5 - v->hoff; |
| 249 |
+ |
d = 1.0/sqrt(d*d + d2*d2); |
| 250 |
+ |
ip[1] = DOT(disp,v->vvec)*d/v->vn2 + 0.5 - v->voff; |
| 251 |
+ |
ip[2] = VLEN(disp); |
| 252 |
+ |
ip[2] *= (1.0 - v->vfore*d); |
| 253 |
+ |
return; |
| 254 |
+ |
case VT_ANG: /* angular fisheye */ |
| 255 |
+ |
ip[0] = 0.5 - v->hoff; |
| 256 |
+ |
ip[1] = 0.5 - v->voff; |
| 257 |
+ |
ip[2] = normalize(disp) - v->vfore; |
| 258 |
+ |
d = DOT(disp,v->vdir); |
| 259 |
+ |
if (d >= 1.0-FTINY) |
| 260 |
+ |
return; |
| 261 |
+ |
if (d <= -(1.0-FTINY)) { |
| 262 |
+ |
ip[0] += 180.0/v->horiz; |
| 263 |
+ |
return; |
| 264 |
+ |
} |
| 265 |
+ |
d = acos(d)/PI / sqrt(1.0 - d*d); |
| 266 |
+ |
ip[0] += DOT(disp,v->hvec)*d*180.0/v->horiz; |
| 267 |
+ |
ip[1] += DOT(disp,v->vvec)*d*180.0/v->vert; |
| 268 |
+ |
return; |
| 269 |
+ |
} |
| 270 |
+ |
ip[0] = DOT(disp,v->hvec)/v->hn2 + 0.5 - v->hoff; |
| 271 |
+ |
ip[1] = DOT(disp,v->vvec)/v->vn2 + 0.5 - v->voff; |
| 272 |
|
} |
| 273 |
|
|
| 274 |
|
|
| 275 |
+ |
void |
| 276 |
+ |
pix2loc(loc, rp, px, py) /* compute image location from pixel pos. */ |
| 277 |
+ |
RREAL loc[2]; |
| 278 |
+ |
register RESOLU *rp; |
| 279 |
+ |
int px, py; |
| 280 |
+ |
{ |
| 281 |
+ |
register int x, y; |
| 282 |
+ |
|
| 283 |
+ |
if (rp->rt & YMAJOR) { |
| 284 |
+ |
x = px; |
| 285 |
+ |
y = py; |
| 286 |
+ |
} else { |
| 287 |
+ |
x = py; |
| 288 |
+ |
y = px; |
| 289 |
+ |
} |
| 290 |
+ |
if (rp->rt & XDECR) |
| 291 |
+ |
x = rp->xr-1 - x; |
| 292 |
+ |
if (rp->rt & YDECR) |
| 293 |
+ |
y = rp->yr-1 - y; |
| 294 |
+ |
loc[0] = (x+.5)/rp->xr; |
| 295 |
+ |
loc[1] = (y+.5)/rp->yr; |
| 296 |
+ |
} |
| 297 |
+ |
|
| 298 |
+ |
|
| 299 |
+ |
void |
| 300 |
+ |
loc2pix(pp, rp, lx, ly) /* compute pixel pos. from image location */ |
| 301 |
+ |
int pp[2]; |
| 302 |
+ |
register RESOLU *rp; |
| 303 |
+ |
double lx, ly; |
| 304 |
+ |
{ |
| 305 |
+ |
register int x, y; |
| 306 |
+ |
|
| 307 |
+ |
x = lx * rp->xr; |
| 308 |
+ |
y = ly * rp->yr; |
| 309 |
+ |
if (rp->rt & XDECR) |
| 310 |
+ |
x = rp->xr-1 - x; |
| 311 |
+ |
if (rp->rt & YDECR) |
| 312 |
+ |
y = rp->yr-1 - y; |
| 313 |
+ |
if (rp->rt & YMAJOR) { |
| 314 |
+ |
pp[0] = x; |
| 315 |
+ |
pp[1] = y; |
| 316 |
+ |
} else { |
| 317 |
+ |
pp[0] = y; |
| 318 |
+ |
pp[1] = x; |
| 319 |
+ |
} |
| 320 |
+ |
} |
| 321 |
+ |
|
| 322 |
+ |
|
| 323 |
+ |
int |
| 324 |
+ |
getviewopt(v, ac, av) /* process view argument */ |
| 325 |
+ |
register VIEW *v; |
| 326 |
+ |
int ac; |
| 327 |
+ |
register char *av[]; |
| 328 |
+ |
{ |
| 329 |
+ |
#define check(c,l) if ((av[0][c]&&av[0][c]!=' ') || \ |
| 330 |
+ |
badarg(ac-1,av+1,l)) return(-1) |
| 331 |
+ |
|
| 332 |
+ |
if (ac <= 0 || av[0][0] != '-' || av[0][1] != 'v') |
| 333 |
+ |
return(-1); |
| 334 |
+ |
switch (av[0][2]) { |
| 335 |
+ |
case 't': /* type */ |
| 336 |
+ |
if (!av[0][3] || av[0][3]==' ') |
| 337 |
+ |
return(-1); |
| 338 |
+ |
check(4,""); |
| 339 |
+ |
v->type = av[0][3]; |
| 340 |
+ |
return(0); |
| 341 |
+ |
case 'p': /* point */ |
| 342 |
+ |
check(3,"fff"); |
| 343 |
+ |
v->vp[0] = atof(av[1]); |
| 344 |
+ |
v->vp[1] = atof(av[2]); |
| 345 |
+ |
v->vp[2] = atof(av[3]); |
| 346 |
+ |
return(3); |
| 347 |
+ |
case 'd': /* direction */ |
| 348 |
+ |
check(3,"fff"); |
| 349 |
+ |
v->vdir[0] = atof(av[1]); |
| 350 |
+ |
v->vdir[1] = atof(av[2]); |
| 351 |
+ |
v->vdir[2] = atof(av[3]); |
| 352 |
+ |
return(3); |
| 353 |
+ |
case 'u': /* up */ |
| 354 |
+ |
check(3,"fff"); |
| 355 |
+ |
v->vup[0] = atof(av[1]); |
| 356 |
+ |
v->vup[1] = atof(av[2]); |
| 357 |
+ |
v->vup[2] = atof(av[3]); |
| 358 |
+ |
return(3); |
| 359 |
+ |
case 'h': /* horizontal size */ |
| 360 |
+ |
check(3,"f"); |
| 361 |
+ |
v->horiz = atof(av[1]); |
| 362 |
+ |
return(1); |
| 363 |
+ |
case 'v': /* vertical size */ |
| 364 |
+ |
check(3,"f"); |
| 365 |
+ |
v->vert = atof(av[1]); |
| 366 |
+ |
return(1); |
| 367 |
+ |
case 'o': /* fore clipping plane */ |
| 368 |
+ |
check(3,"f"); |
| 369 |
+ |
v->vfore = atof(av[1]); |
| 370 |
+ |
return(1); |
| 371 |
+ |
case 'a': /* aft clipping plane */ |
| 372 |
+ |
check(3,"f"); |
| 373 |
+ |
v->vaft = atof(av[1]); |
| 374 |
+ |
return(1); |
| 375 |
+ |
case 's': /* shift */ |
| 376 |
+ |
check(3,"f"); |
| 377 |
+ |
v->hoff = atof(av[1]); |
| 378 |
+ |
return(1); |
| 379 |
+ |
case 'l': /* lift */ |
| 380 |
+ |
check(3,"f"); |
| 381 |
+ |
v->voff = atof(av[1]); |
| 382 |
+ |
return(1); |
| 383 |
+ |
default: |
| 384 |
+ |
return(-1); |
| 385 |
+ |
} |
| 386 |
+ |
#undef check |
| 387 |
+ |
} |
| 388 |
+ |
|
| 389 |
+ |
|
| 390 |
+ |
int |
| 391 |
+ |
sscanview(vp, s) /* get view parameters from string */ |
| 392 |
+ |
VIEW *vp; |
| 393 |
+ |
register char *s; |
| 394 |
+ |
{ |
| 395 |
+ |
int ac; |
| 396 |
+ |
char *av[4]; |
| 397 |
+ |
int na; |
| 398 |
+ |
int nvopts = 0; |
| 399 |
+ |
|
| 400 |
+ |
while (*s == ' ') |
| 401 |
+ |
s++; |
| 402 |
+ |
if (*s != '-') |
| 403 |
+ |
s = sskip2(s,1); |
| 404 |
+ |
while (*s) { |
| 405 |
+ |
ac = 0; |
| 406 |
+ |
do { |
| 407 |
+ |
if (ac || *s == '-') |
| 408 |
+ |
av[ac++] = s; |
| 409 |
+ |
while (*s && *s != ' ') |
| 410 |
+ |
s++; |
| 411 |
+ |
while (*s == ' ') |
| 412 |
+ |
s++; |
| 413 |
+ |
} while (*s && ac < 4); |
| 414 |
+ |
if ((na = getviewopt(vp, ac, av)) >= 0) { |
| 415 |
+ |
if (na+1 < ac) |
| 416 |
+ |
s = av[na+1]; |
| 417 |
+ |
nvopts++; |
| 418 |
+ |
} else if (ac > 1) |
| 419 |
+ |
s = av[1]; |
| 420 |
+ |
} |
| 421 |
+ |
return(nvopts); |
| 422 |
+ |
} |
| 423 |
+ |
|
| 424 |
+ |
|
| 425 |
+ |
void |
| 426 |
|
fprintview(vp, fp) /* write out view parameters */ |
| 427 |
|
register VIEW *vp; |
| 428 |
|
FILE *fp; |
| 429 |
|
{ |
| 430 |
|
fprintf(fp, " -vt%c", vp->type); |
| 431 |
|
fprintf(fp, " -vp %.6g %.6g %.6g", vp->vp[0], vp->vp[1], vp->vp[2]); |
| 432 |
< |
fprintf(fp, " -vd %.6g %.6g %.6g", vp->vdir[0], vp->vdir[1], vp->vdir[2]); |
| 432 |
> |
fprintf(fp, " -vd %.6g %.6g %.6g", vp->vdir[0]*vp->vdist, |
| 433 |
> |
vp->vdir[1]*vp->vdist, |
| 434 |
> |
vp->vdir[2]*vp->vdist); |
| 435 |
|
fprintf(fp, " -vu %.6g %.6g %.6g", vp->vup[0], vp->vup[1], vp->vup[2]); |
| 436 |
|
fprintf(fp, " -vh %.6g -vv %.6g", vp->horiz, vp->vert); |
| 437 |
< |
fprintf(fp, " -x %d -y %d", vp->hresolu, vp->vresolu); |
| 437 |
> |
fprintf(fp, " -vo %.6g -va %.6g", vp->vfore, vp->vaft); |
| 438 |
> |
fprintf(fp, " -vs %.6g -vl %.6g", vp->hoff, vp->voff); |
| 439 |
|
} |
| 440 |
|
|
| 441 |
|
|
| 442 |
< |
static VIEW *hview; /* view from header */ |
| 443 |
< |
static int gothview; /* success indicator */ |
| 444 |
< |
static char *altname[] = {NULL,"rpict","rview",VIEWSTR,NULL}; |
| 442 |
> |
char * |
| 443 |
> |
viewopt(vp) /* translate to minimal view string */ |
| 444 |
> |
register VIEW *vp; |
| 445 |
> |
{ |
| 446 |
> |
static char vwstr[128]; |
| 447 |
> |
register char *cp = vwstr; |
| 448 |
|
|
| 449 |
+ |
if (vp->type != stdview.type) { |
| 450 |
+ |
sprintf(cp, " -vt%c", vp->type); |
| 451 |
+ |
cp += strlen(cp); |
| 452 |
+ |
} |
| 453 |
+ |
if (!VEQ(vp->vp,stdview.vp)) { |
| 454 |
+ |
sprintf(cp, " -vp %.6g %.6g %.6g", |
| 455 |
+ |
vp->vp[0], vp->vp[1], vp->vp[2]); |
| 456 |
+ |
cp += strlen(cp); |
| 457 |
+ |
} |
| 458 |
+ |
if (!FEQ(vp->vdist,stdview.vdist) || !VEQ(vp->vdir,stdview.vdir)) { |
| 459 |
+ |
sprintf(cp, " -vd %.6g %.6g %.6g", |
| 460 |
+ |
vp->vdir[0]*vp->vdist, |
| 461 |
+ |
vp->vdir[1]*vp->vdist, |
| 462 |
+ |
vp->vdir[2]*vp->vdist); |
| 463 |
+ |
cp += strlen(cp); |
| 464 |
+ |
} |
| 465 |
+ |
if (!VEQ(vp->vup,stdview.vup)) { |
| 466 |
+ |
sprintf(cp, " -vu %.6g %.6g %.6g", |
| 467 |
+ |
vp->vup[0], vp->vup[1], vp->vup[2]); |
| 468 |
+ |
cp += strlen(cp); |
| 469 |
+ |
} |
| 470 |
+ |
if (!FEQ(vp->horiz,stdview.horiz)) { |
| 471 |
+ |
sprintf(cp, " -vh %.6g", vp->horiz); |
| 472 |
+ |
cp += strlen(cp); |
| 473 |
+ |
} |
| 474 |
+ |
if (!FEQ(vp->vert,stdview.vert)) { |
| 475 |
+ |
sprintf(cp, " -vv %.6g", vp->vert); |
| 476 |
+ |
cp += strlen(cp); |
| 477 |
+ |
} |
| 478 |
+ |
if (!FEQ(vp->vfore,stdview.vfore)) { |
| 479 |
+ |
sprintf(cp, " -vo %.6g", vp->vfore); |
| 480 |
+ |
cp += strlen(cp); |
| 481 |
+ |
} |
| 482 |
+ |
if (!FEQ(vp->vaft,stdview.vaft)) { |
| 483 |
+ |
sprintf(cp, " -va %.6g", vp->vaft); |
| 484 |
+ |
cp += strlen(cp); |
| 485 |
+ |
} |
| 486 |
+ |
if (!FEQ(vp->hoff,stdview.hoff)) { |
| 487 |
+ |
sprintf(cp, " -vs %.6g", vp->hoff); |
| 488 |
+ |
cp += strlen(cp); |
| 489 |
+ |
} |
| 490 |
+ |
if (!FEQ(vp->voff,stdview.voff)) { |
| 491 |
+ |
sprintf(cp, " -vl %.6g", vp->voff); |
| 492 |
+ |
cp += strlen(cp); |
| 493 |
+ |
} |
| 494 |
+ |
return(vwstr); |
| 495 |
+ |
} |
| 496 |
|
|
| 497 |
< |
static |
| 498 |
< |
gethview(s) /* get view from header */ |
| 497 |
> |
|
| 498 |
> |
int |
| 499 |
> |
isview(s) /* is this a view string? */ |
| 500 |
|
char *s; |
| 501 |
|
{ |
| 502 |
+ |
static char *altname[]={NULL,VIEWSTR,"rpict","rview","rvu","rpiece","pinterp",NULL}; |
| 503 |
+ |
extern char *progname; |
| 504 |
+ |
register char *cp; |
| 505 |
|
register char **an; |
| 506 |
< |
|
| 506 |
> |
/* add program name to list */ |
| 507 |
> |
if (altname[0] == NULL) { |
| 508 |
> |
for (cp = progname; *cp; cp++) |
| 509 |
> |
; |
| 510 |
> |
while (cp > progname && !ISDIRSEP(cp[-1])) |
| 511 |
> |
cp--; |
| 512 |
> |
altname[0] = cp; |
| 513 |
> |
} |
| 514 |
> |
/* skip leading path */ |
| 515 |
> |
cp = s; |
| 516 |
> |
while (*cp && *cp != ' ') |
| 517 |
> |
cp++; |
| 518 |
> |
while (cp > s && !ISDIRSEP(cp[-1])) |
| 519 |
> |
cp--; |
| 520 |
|
for (an = altname; *an != NULL; an++) |
| 521 |
< |
if (!strncmp(*an, s, strlen(*an))) { |
| 522 |
< |
if (sscanview(hview, s+strlen(*an)) == 0) |
| 523 |
< |
gothview++; |
| 199 |
< |
return; |
| 200 |
< |
} |
| 521 |
> |
if (!strncmp(*an, cp, strlen(*an))) |
| 522 |
> |
return(1); |
| 523 |
> |
return(0); |
| 524 |
|
} |
| 525 |
|
|
| 526 |
|
|
| 527 |
+ |
struct myview { |
| 528 |
+ |
VIEW *hv; |
| 529 |
+ |
int ok; |
| 530 |
+ |
}; |
| 531 |
+ |
|
| 532 |
+ |
|
| 533 |
+ |
static int |
| 534 |
+ |
gethview( /* get view from header */ |
| 535 |
+ |
char *s, |
| 536 |
+ |
void *v |
| 537 |
+ |
) |
| 538 |
+ |
{ |
| 539 |
+ |
if (isview(s) && sscanview(((struct myview*)v)->hv, s) > 0) |
| 540 |
+ |
((struct myview*)v)->ok++; |
| 541 |
+ |
return(0); |
| 542 |
+ |
} |
| 543 |
+ |
|
| 544 |
+ |
|
| 545 |
|
int |
| 546 |
< |
viewfile(fname, vp) /* get view from file */ |
| 546 |
> |
viewfile(fname, vp, rp) /* get view from file */ |
| 547 |
|
char *fname; |
| 548 |
|
VIEW *vp; |
| 549 |
+ |
RESOLU *rp; |
| 550 |
|
{ |
| 551 |
< |
extern char *progname; |
| 551 |
> |
struct myview mvs; |
| 552 |
|
FILE *fp; |
| 553 |
|
|
| 554 |
< |
if ((fp = fopen(fname, "r")) == NULL) |
| 554 |
> |
if (fname == NULL || !strcmp(fname, "-")) |
| 555 |
> |
fp = stdin; |
| 556 |
> |
else if ((fp = fopen(fname, "r")) == NULL) |
| 557 |
|
return(-1); |
| 558 |
|
|
| 559 |
< |
altname[0] = progname; |
| 560 |
< |
hview = vp; |
| 217 |
< |
gothview = 0; |
| 559 |
> |
mvs.hv = vp; |
| 560 |
> |
mvs.ok = 0; |
| 561 |
|
|
| 562 |
< |
getheader(fp, gethview); |
| 562 |
> |
getheader(fp, gethview, &mvs); |
| 563 |
|
|
| 564 |
+ |
if (rp != NULL && !fgetsresolu(rp, fp)) |
| 565 |
+ |
mvs.ok = 0; |
| 566 |
+ |
|
| 567 |
|
fclose(fp); |
| 568 |
|
|
| 569 |
< |
return(gothview); |
| 569 |
> |
return(mvs.ok); |
| 570 |
|
} |
