| 12 |
|
|
| 13 |
|
#include "standard.h" |
| 14 |
|
|
| 15 |
– |
#include "color.h" |
| 16 |
– |
|
| 15 |
|
#include "view.h" |
| 16 |
|
|
| 17 |
< |
VIEW stdview = STDVIEW(512); /* default view parameters */ |
| 17 |
> |
VIEW stdview = STDVIEW; /* default view parameters */ |
| 18 |
|
|
| 19 |
|
|
| 22 |
– |
bigdiff(c1, c2, md) /* c1 delta c2 > md? */ |
| 23 |
– |
register COLOR c1, c2; |
| 24 |
– |
double md; |
| 25 |
– |
{ |
| 26 |
– |
register int i; |
| 27 |
– |
|
| 28 |
– |
for (i = 0; i < 3; i++) |
| 29 |
– |
if (colval(c1,i)-colval(c2,i) > md*colval(c2,i) || |
| 30 |
– |
colval(c2,i)-colval(c1,i) > md*colval(c1,i)) |
| 31 |
– |
return(1); |
| 32 |
– |
return(0); |
| 33 |
– |
} |
| 34 |
– |
|
| 35 |
– |
|
| 20 |
|
char * |
| 21 |
< |
setview(v) /* set vhinc and vvinc, return message on error */ |
| 21 |
> |
setview(v) /* set hvec and vvec, return message on error */ |
| 22 |
|
register VIEW *v; |
| 23 |
|
{ |
| 24 |
< |
double tan(), dt; |
| 25 |
< |
|
| 24 |
> |
extern double tan(), normalize(); |
| 25 |
> |
|
| 26 |
|
if (normalize(v->vdir) == 0.0) /* normalize direction */ |
| 27 |
|
return("zero view direction"); |
| 44 |
– |
|
| 45 |
– |
fcross(v->vhinc, v->vdir, v->vup); /* compute horiz dir */ |
| 28 |
|
|
| 29 |
< |
if (normalize(v->vhinc) == 0.0) |
| 29 |
> |
fcross(v->hvec, v->vdir, v->vup); /* compute horiz dir */ |
| 30 |
> |
|
| 31 |
> |
if (normalize(v->hvec) == 0.0) |
| 32 |
|
return("illegal view up vector"); |
| 49 |
– |
|
| 50 |
– |
fcross(v->vvinc, v->vhinc, v->vdir); /* compute vert dir */ |
| 33 |
|
|
| 34 |
+ |
fcross(v->vvec, v->hvec, v->vdir); /* compute vert dir */ |
| 35 |
+ |
|
| 36 |
|
if (v->type == VT_PAR) |
| 37 |
< |
dt = v->horiz; |
| 37 |
> |
v->hn2 = v->horiz; |
| 38 |
|
else if (v->type == VT_PER) |
| 39 |
< |
dt = 2.0 * tan(v->horiz*(PI/180.0/2.0)); |
| 39 |
> |
v->hn2 = 2.0 * tan(v->horiz*(PI/180.0/2.0)); |
| 40 |
|
else |
| 41 |
|
return("unknown view type"); |
| 42 |
|
|
| 43 |
< |
if (dt <= FTINY || dt >= FHUGE) |
| 43 |
> |
if (v->hn2 <= FTINY || v->hn2 >= FHUGE) |
| 44 |
|
return("illegal horizontal view size"); |
| 45 |
|
|
| 46 |
< |
if (v->hresolu <= 0) |
| 47 |
< |
return("illegal horizontal resolution"); |
| 46 |
> |
v->hvec[0] *= v->hn2; |
| 47 |
> |
v->hvec[1] *= v->hn2; |
| 48 |
> |
v->hvec[2] *= v->hn2; |
| 49 |
> |
v->hn2 *= v->hn2; |
| 50 |
|
|
| 65 |
– |
dt /= (double)v->hresolu; |
| 66 |
– |
v->vhinc[0] *= dt; |
| 67 |
– |
v->vhinc[1] *= dt; |
| 68 |
– |
v->vhinc[2] *= dt; |
| 69 |
– |
|
| 51 |
|
if (v->type == VT_PAR) |
| 52 |
< |
dt = v->vert; |
| 52 |
> |
v->vn2 = v->vert; |
| 53 |
|
else |
| 54 |
< |
dt = 2.0 * tan(v->vert*(PI/180.0/2.0)); |
| 54 |
> |
v->vn2 = 2.0 * tan(v->vert*(PI/180.0/2.0)); |
| 55 |
|
|
| 56 |
< |
if (dt <= FTINY || dt >= FHUGE) |
| 56 |
> |
if (v->vn2 <= FTINY || v->vn2 >= FHUGE) |
| 57 |
|
return("illegal vertical view size"); |
| 58 |
|
|
| 59 |
< |
if (v->vresolu <= 0) |
| 60 |
< |
return("illegal vertical resolution"); |
| 61 |
< |
|
| 62 |
< |
dt /= (double)v->vresolu; |
| 82 |
< |
v->vvinc[0] *= dt; |
| 83 |
< |
v->vvinc[1] *= dt; |
| 84 |
< |
v->vvinc[2] *= dt; |
| 59 |
> |
v->vvec[0] *= v->vn2; |
| 60 |
> |
v->vvec[1] *= v->vn2; |
| 61 |
> |
v->vvec[2] *= v->vn2; |
| 62 |
> |
v->vn2 *= v->vn2; |
| 63 |
|
|
| 64 |
|
return(NULL); |
| 65 |
|
} |
| 66 |
|
|
| 67 |
|
|
| 68 |
< |
rayview(orig, direc, v, x, y) /* compute ray origin and direction */ |
| 68 |
> |
normaspect(vp, ap, xp, yp) /* fix pixel aspect or resolution */ |
| 69 |
> |
VIEW *vp; |
| 70 |
> |
double *ap; |
| 71 |
> |
int *xp, *yp; |
| 72 |
> |
{ |
| 73 |
> |
double va = viewaspect(vp); |
| 74 |
> |
|
| 75 |
> |
if (*ap <= FTINY) |
| 76 |
> |
*ap = (double)*yp / *xp / va; /* compute pixel aspect */ |
| 77 |
> |
else if (va * *xp > *ap * *yp) |
| 78 |
> |
*xp = *yp / va * *ap; /* reduce x resolution */ |
| 79 |
> |
else |
| 80 |
> |
*yp = *xp * va / *ap; /* reduce y resolution */ |
| 81 |
> |
} |
| 82 |
> |
|
| 83 |
> |
|
| 84 |
> |
viewray(orig, direc, v, x, y) /* compute ray origin and direction */ |
| 85 |
|
FVECT orig, direc; |
| 86 |
|
register VIEW *v; |
| 87 |
|
double x, y; |
| 88 |
|
{ |
| 89 |
< |
register int i; |
| 89 |
> |
x += v->hoff - 0.5; |
| 90 |
> |
y += v->voff - 0.5; |
| 91 |
|
|
| 97 |
– |
x -= 0.5 * v->hresolu; |
| 98 |
– |
y -= 0.5 * v->vresolu; |
| 99 |
– |
|
| 92 |
|
if (v->type == VT_PAR) { /* parallel view */ |
| 93 |
< |
for (i = 0; i < 3; i++) |
| 94 |
< |
orig[i] = v->vp[i] + x*v->vhinc[i] + y*v->vvinc[i]; |
| 93 |
> |
orig[0] = v->vp[0] + x*v->hvec[0] + y*v->vvec[0]; |
| 94 |
> |
orig[1] = v->vp[1] + x*v->hvec[1] + y*v->vvec[1]; |
| 95 |
> |
orig[2] = v->vp[2] + x*v->hvec[2] + y*v->vvec[2]; |
| 96 |
|
VCOPY(direc, v->vdir); |
| 97 |
|
} else { /* perspective view */ |
| 98 |
|
VCOPY(orig, v->vp); |
| 99 |
< |
for (i = 0; i < 3; i++) |
| 100 |
< |
direc[i] = v->vdir[i] + x*v->vhinc[i] + y*v->vvinc[i]; |
| 99 |
> |
direc[0] = v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
| 100 |
> |
direc[1] = v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
| 101 |
> |
direc[2] = v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
| 102 |
|
normalize(direc); |
| 103 |
|
} |
| 104 |
|
} |
| 105 |
|
|
| 106 |
|
|
| 107 |
< |
sscanview(vp, s) /* get view parameters */ |
| 108 |
< |
register VIEW *vp; |
| 107 |
> |
viewpixel(xp, yp, zp, v, p) /* find image location for point */ |
| 108 |
> |
double *xp, *yp, *zp; |
| 109 |
> |
register VIEW *v; |
| 110 |
> |
FVECT p; |
| 111 |
> |
{ |
| 112 |
> |
extern double sqrt(); |
| 113 |
> |
double d; |
| 114 |
> |
FVECT disp; |
| 115 |
> |
|
| 116 |
> |
disp[0] = p[0] - v->vp[0]; |
| 117 |
> |
disp[1] = p[1] - v->vp[1]; |
| 118 |
> |
disp[2] = p[2] - v->vp[2]; |
| 119 |
> |
|
| 120 |
> |
if (v->type == VT_PAR) { /* parallel view */ |
| 121 |
> |
if (zp != NULL) |
| 122 |
> |
*zp = DOT(disp,v->vdir); |
| 123 |
> |
} else { /* perspective view */ |
| 124 |
> |
d = 1.0/DOT(disp,v->vdir); |
| 125 |
> |
if (zp != NULL) { |
| 126 |
> |
*zp = sqrt(DOT(disp,disp)); |
| 127 |
> |
if (d < 0.0) |
| 128 |
> |
*zp = -*zp; |
| 129 |
> |
} |
| 130 |
> |
disp[0] *= d; |
| 131 |
> |
disp[1] *= d; |
| 132 |
> |
disp[2] *= d; |
| 133 |
> |
} |
| 134 |
> |
*xp = DOT(disp,v->hvec)/v->hn2 + 0.5 - v->hoff; |
| 135 |
> |
*yp = DOT(disp,v->vvec)/v->vn2 + 0.5 - v->voff; |
| 136 |
> |
} |
| 137 |
> |
|
| 138 |
> |
|
| 139 |
> |
int |
| 140 |
> |
getviewopt(v, ac, av) /* process view argument */ |
| 141 |
> |
register VIEW *v; |
| 142 |
> |
int ac; |
| 143 |
> |
register char *av[]; |
| 144 |
> |
{ |
| 145 |
> |
#define check(c,n) if ((av[0][c]&&av[0][c]!=' ') || n>=ac) return(-1) |
| 146 |
> |
extern double atof(); |
| 147 |
> |
|
| 148 |
> |
if (av[0][0] != '-' || av[0][1] != 'v') |
| 149 |
> |
return(-1); |
| 150 |
> |
switch (av[0][2]) { |
| 151 |
> |
case 't': /* type */ |
| 152 |
> |
if (!av[0][3] || av[0][3]==' ') |
| 153 |
> |
return(-1); |
| 154 |
> |
check(4,0); |
| 155 |
> |
v->type = av[0][3]; |
| 156 |
> |
return(0); |
| 157 |
> |
case 'p': /* point */ |
| 158 |
> |
check(3,3); |
| 159 |
> |
v->vp[0] = atof(av[1]); |
| 160 |
> |
v->vp[1] = atof(av[2]); |
| 161 |
> |
v->vp[2] = atof(av[3]); |
| 162 |
> |
return(3); |
| 163 |
> |
case 'd': /* direction */ |
| 164 |
> |
check(3,3); |
| 165 |
> |
v->vdir[0] = atof(av[1]); |
| 166 |
> |
v->vdir[1] = atof(av[2]); |
| 167 |
> |
v->vdir[2] = atof(av[3]); |
| 168 |
> |
return(3); |
| 169 |
> |
case 'u': /* up */ |
| 170 |
> |
check(3,3); |
| 171 |
> |
v->vup[0] = atof(av[1]); |
| 172 |
> |
v->vup[1] = atof(av[2]); |
| 173 |
> |
v->vup[2] = atof(av[3]); |
| 174 |
> |
return(3); |
| 175 |
> |
case 'h': /* horizontal size */ |
| 176 |
> |
check(3,1); |
| 177 |
> |
v->horiz = atof(av[1]); |
| 178 |
> |
return(1); |
| 179 |
> |
case 'v': /* vertical size */ |
| 180 |
> |
check(3,1); |
| 181 |
> |
v->vert = atof(av[1]); |
| 182 |
> |
return(1); |
| 183 |
> |
case 's': /* shift */ |
| 184 |
> |
check(3,1); |
| 185 |
> |
v->hoff = atof(av[1]); |
| 186 |
> |
return(1); |
| 187 |
> |
case 'l': /* lift */ |
| 188 |
> |
check(3,1); |
| 189 |
> |
v->voff = atof(av[1]); |
| 190 |
> |
return(1); |
| 191 |
> |
default: |
| 192 |
> |
return(-1); |
| 193 |
> |
} |
| 194 |
> |
#undef check |
| 195 |
> |
} |
| 196 |
> |
|
| 197 |
> |
|
| 198 |
> |
int |
| 199 |
> |
sscanview(vp, s) /* get view parameters from string */ |
| 200 |
> |
VIEW *vp; |
| 201 |
|
register char *s; |
| 202 |
|
{ |
| 203 |
< |
for ( ; ; ) |
| 204 |
< |
switch (*s++) { |
| 205 |
< |
case '\0': |
| 206 |
< |
case '\n': |
| 207 |
< |
return(0); |
| 208 |
< |
case '-': |
| 209 |
< |
switch (*s++) { |
| 210 |
< |
case '\0': |
| 211 |
< |
return(-1); |
| 212 |
< |
case 'x': |
| 213 |
< |
if (sscanf(s, "%d", &vp->hresolu) != 1) |
| 214 |
< |
return(-1); |
| 215 |
< |
s = sskip(s); |
| 216 |
< |
continue; |
| 217 |
< |
case 'y': |
| 218 |
< |
if (sscanf(s, "%d", &vp->vresolu) != 1) |
| 219 |
< |
return(-1); |
| 220 |
< |
s = sskip(s); |
| 221 |
< |
continue; |
| 222 |
< |
case 'v': |
| 137 |
< |
switch (*s++) { |
| 138 |
< |
case '\0': |
| 139 |
< |
return(-1); |
| 140 |
< |
case 't': |
| 141 |
< |
vp->type = *s++; |
| 142 |
< |
continue; |
| 143 |
< |
case 'p': |
| 144 |
< |
if (sscanf(s, "%lf %lf %lf", |
| 145 |
< |
&vp->vp[0], |
| 146 |
< |
&vp->vp[1], |
| 147 |
< |
&vp->vp[2]) != 3) |
| 148 |
< |
return(-1); |
| 149 |
< |
s = sskip(sskip(sskip(s))); |
| 150 |
< |
continue; |
| 151 |
< |
case 'd': |
| 152 |
< |
if (sscanf(s, "%lf %lf %lf", |
| 153 |
< |
&vp->vdir[0], |
| 154 |
< |
&vp->vdir[1], |
| 155 |
< |
&vp->vdir[2]) != 3) |
| 156 |
< |
return(-1); |
| 157 |
< |
s = sskip(sskip(sskip(s))); |
| 158 |
< |
continue; |
| 159 |
< |
case 'u': |
| 160 |
< |
if (sscanf(s, "%lf %lf %lf", |
| 161 |
< |
&vp->vup[0], |
| 162 |
< |
&vp->vup[1], |
| 163 |
< |
&vp->vup[2]) != 3) |
| 164 |
< |
return(-1); |
| 165 |
< |
s = sskip(sskip(sskip(s))); |
| 166 |
< |
continue; |
| 167 |
< |
case 'h': |
| 168 |
< |
if (sscanf(s, "%lf", |
| 169 |
< |
&vp->horiz) != 1) |
| 170 |
< |
return(-1); |
| 171 |
< |
s = sskip(s); |
| 172 |
< |
continue; |
| 173 |
< |
case 'v': |
| 174 |
< |
if (sscanf(s, "%lf", |
| 175 |
< |
&vp->vert) != 1) |
| 176 |
< |
return(-1); |
| 177 |
< |
s = sskip(s); |
| 178 |
< |
continue; |
| 179 |
< |
} |
| 180 |
< |
continue; |
| 181 |
< |
} |
| 182 |
< |
continue; |
| 203 |
> |
int ac; |
| 204 |
> |
char *av[4]; |
| 205 |
> |
int na; |
| 206 |
> |
int nvopts = 0; |
| 207 |
> |
|
| 208 |
> |
while (*s == ' ') |
| 209 |
> |
s++; |
| 210 |
> |
do { |
| 211 |
> |
ac = 0; |
| 212 |
> |
do { |
| 213 |
> |
av[ac++] = s; |
| 214 |
> |
while (*s && *s != ' ') |
| 215 |
> |
s++; |
| 216 |
> |
while (*s == ' ') |
| 217 |
> |
s++; |
| 218 |
> |
} while (*s && ac < 4); |
| 219 |
> |
if ((na = getviewopt(vp, ac, av)) >= 0) { |
| 220 |
> |
if (na+1 < ac) |
| 221 |
> |
s = av[na+1]; |
| 222 |
> |
nvopts++; |
| 223 |
|
} |
| 224 |
+ |
} while (*s); |
| 225 |
+ |
return(nvopts); |
| 226 |
|
} |
| 227 |
|
|
| 228 |
|
|
| 235 |
|
fprintf(fp, " -vd %.6g %.6g %.6g", vp->vdir[0], vp->vdir[1], vp->vdir[2]); |
| 236 |
|
fprintf(fp, " -vu %.6g %.6g %.6g", vp->vup[0], vp->vup[1], vp->vup[2]); |
| 237 |
|
fprintf(fp, " -vh %.6g -vv %.6g", vp->horiz, vp->vert); |
| 238 |
< |
fprintf(fp, " -x %d -y %d", vp->hresolu, vp->vresolu); |
| 238 |
> |
fprintf(fp, " -vs %d -vl %d", vp->hoff, vp->voff); |
| 239 |
|
} |
| 240 |
|
|
| 241 |
|
|
| 242 |
|
static VIEW *hview; /* view from header */ |
| 243 |
|
static int gothview; /* success indicator */ |
| 244 |
< |
static char *altname[] = {NULL,"rpict","rview",VIEWSTR,NULL}; |
| 244 |
> |
static char *altname[] = {NULL,"rpict","rview","pinterp",VIEWSTR,NULL}; |
| 245 |
|
|
| 246 |
|
|
| 247 |
|
static |
| 252 |
|
|
| 253 |
|
for (an = altname; *an != NULL; an++) |
| 254 |
|
if (!strncmp(*an, s, strlen(*an))) { |
| 255 |
< |
if (sscanview(hview, s+strlen(*an)) == 0) |
| 255 |
> |
if (sscanview(hview, s+strlen(*an)) > 0) |
| 256 |
|
gothview++; |
| 257 |
|
return; |
| 258 |
|
} |
