1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: image.c,v 2.35 2008/12/12 22:05:38 greg Exp $"; |
3 |
#endif |
4 |
/* |
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* image.c - routines for image generation. |
6 |
* |
7 |
* External symbols declared in view.h |
8 |
*/ |
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|
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#include "copyright.h" |
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|
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#include <ctype.h> |
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#include "rtio.h" |
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#include "rtmath.h" |
15 |
#include "paths.h" |
16 |
#include "view.h" |
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|
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|
19 |
#define FEQ(x,y) (fabs((x)-(y)) <= FTINY) |
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#define VEQ(v,w) (FEQ((v)[0],(w)[0]) && FEQ((v)[1],(w)[1]) \ |
21 |
&& FEQ((v)[2],(w)[2])) |
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|
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VIEW stdview = STDVIEW; /* default view parameters */ |
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|
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static gethfunc gethview; |
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|
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|
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char * |
29 |
setview( /* set hvec and vvec, return message on error */ |
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VIEW *v |
31 |
) |
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{ |
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static char ill_horiz[] = "illegal horizontal view size"; |
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static char ill_vert[] = "illegal vertical view size"; |
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|
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if (v->vaft < -FTINY || (v->vaft > FTINY && v->vaft <= v->vfore)) |
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return("illegal fore/aft clipping plane"); |
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|
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if (v->vdist <= FTINY) |
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return("illegal view distance"); |
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v->vdist *= normalize(v->vdir); /* normalize direction */ |
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if (v->vdist == 0.0) |
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return("zero view direction"); |
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|
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if (normalize(v->vup) == 0.0) /* normalize view up */ |
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return("zero view up vector"); |
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|
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fcross(v->hvec, v->vdir, v->vup); /* compute horiz dir */ |
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|
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if (normalize(v->hvec) == 0.0) |
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return("view up parallel to view direction"); |
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|
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fcross(v->vvec, v->hvec, v->vdir); /* compute vert dir */ |
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|
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if (v->horiz <= FTINY) |
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return(ill_horiz); |
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if (v->vert <= FTINY) |
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return(ill_vert); |
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|
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switch (v->type) { |
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case VT_PAR: /* parallel view */ |
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v->hn2 = v->horiz; |
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v->vn2 = v->vert; |
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break; |
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case VT_PER: /* perspective view */ |
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if (v->horiz >= 180.0-FTINY) |
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return(ill_horiz); |
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if (v->vert >= 180.0-FTINY) |
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return(ill_vert); |
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v->hn2 = 2.0 * tan(v->horiz*(PI/180.0/2.0)); |
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v->vn2 = 2.0 * tan(v->vert*(PI/180.0/2.0)); |
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break; |
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case VT_CYL: /* cylindrical panorama */ |
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if (v->horiz > 360.0+FTINY) |
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return(ill_horiz); |
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if (v->vert >= 180.0-FTINY) |
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return(ill_vert); |
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v->hn2 = v->horiz * (PI/180.0); |
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v->vn2 = 2.0 * tan(v->vert*(PI/180.0/2.0)); |
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break; |
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case VT_ANG: /* angular fisheye */ |
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if (v->horiz > 360.0+FTINY) |
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return(ill_horiz); |
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if (v->vert > 360.0+FTINY) |
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return(ill_vert); |
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v->hn2 = v->horiz * (PI/180.0); |
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v->vn2 = v->vert * (PI/180.0); |
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break; |
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case VT_HEM: /* hemispherical fisheye */ |
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if (v->horiz > 180.0+FTINY) |
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return(ill_horiz); |
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if (v->vert > 180.0+FTINY) |
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return(ill_vert); |
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v->hn2 = 2.0 * sin(v->horiz*(PI/180.0/2.0)); |
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v->vn2 = 2.0 * sin(v->vert*(PI/180.0/2.0)); |
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break; |
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case VT_PLS: /* planispheric fisheye */ |
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if (v->horiz >= 360.0-FTINY) |
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return(ill_horiz); |
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if (v->vert >= 360.0-FTINY) |
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return(ill_vert); |
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v->hn2 = 2.*sin(v->horiz*(PI/180.0/2.0)) / |
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(1.0 + cos(v->horiz*(PI/180.0/2.0))); |
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v->vn2 = 2.*sin(v->vert*(PI/180.0/2.0)) / |
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(1.0 + cos(v->vert*(PI/180.0/2.0))); |
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break; |
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default: |
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return("unknown view type"); |
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} |
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if (v->type != VT_ANG && v->type != VT_PLS) { |
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if (v->type != VT_CYL) { |
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v->hvec[0] *= v->hn2; |
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v->hvec[1] *= v->hn2; |
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v->hvec[2] *= v->hn2; |
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} |
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v->vvec[0] *= v->vn2; |
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v->vvec[1] *= v->vn2; |
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v->vvec[2] *= v->vn2; |
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} |
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v->hn2 *= v->hn2; |
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v->vn2 *= v->vn2; |
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|
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return(NULL); |
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} |
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|
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|
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void |
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normaspect( /* fix pixel aspect or resolution */ |
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double va, /* view aspect ratio */ |
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double *ap, /* pixel aspect in (or out if 0) */ |
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int *xp, |
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int *yp /* x and y resolution in (or out if *ap!=0) */ |
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) |
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{ |
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if (*ap <= FTINY) |
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*ap = va * *xp / *yp; /* compute pixel aspect */ |
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else if (va * *xp > *ap * *yp) |
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*xp = *yp / va * *ap + .5; /* reduce x resolution */ |
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else |
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*yp = *xp * va / *ap + .5; /* reduce y resolution */ |
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} |
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|
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|
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double |
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viewray( /* compute ray origin and direction */ |
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FVECT orig, |
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FVECT direc, |
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VIEW *v, |
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double x, |
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double y |
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) |
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{ |
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double d, z; |
154 |
|
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x += v->hoff - 0.5; |
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y += v->voff - 0.5; |
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|
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switch(v->type) { |
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case VT_PAR: /* parallel view */ |
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orig[0] = v->vp[0] + v->vfore*v->vdir[0] |
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+ x*v->hvec[0] + y*v->vvec[0]; |
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orig[1] = v->vp[1] + v->vfore*v->vdir[1] |
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+ x*v->hvec[1] + y*v->vvec[1]; |
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orig[2] = v->vp[2] + v->vfore*v->vdir[2] |
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+ x*v->hvec[2] + y*v->vvec[2]; |
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VCOPY(direc, v->vdir); |
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return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
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case VT_PER: /* perspective view */ |
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direc[0] = v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
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direc[1] = v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
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direc[2] = v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
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orig[0] = v->vp[0] + v->vfore*direc[0]; |
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orig[1] = v->vp[1] + v->vfore*direc[1]; |
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orig[2] = v->vp[2] + v->vfore*direc[2]; |
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d = normalize(direc); |
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return(v->vaft > FTINY ? (v->vaft - v->vfore)*d : 0.0); |
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case VT_HEM: /* hemispherical fisheye */ |
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z = 1.0 - x*x*v->hn2 - y*y*v->vn2; |
179 |
if (z < 0.0) |
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return(-1.0); |
181 |
z = sqrt(z); |
182 |
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
183 |
direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
184 |
direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
185 |
orig[0] = v->vp[0] + v->vfore*direc[0]; |
186 |
orig[1] = v->vp[1] + v->vfore*direc[1]; |
187 |
orig[2] = v->vp[2] + v->vfore*direc[2]; |
188 |
return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
189 |
case VT_CYL: /* cylindrical panorama */ |
190 |
d = x * v->horiz * (PI/180.0); |
191 |
z = cos(d); |
192 |
x = sin(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]; |
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direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
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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]; |
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d = normalize(direc); |
200 |
return(v->vaft > FTINY ? (v->vaft - v->vfore)*d : 0.0); |
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case VT_ANG: /* angular fisheye */ |
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x *= (1.0/180.0)*v->horiz; |
203 |
y *= (1.0/180.0)*v->vert; |
204 |
d = x*x + y*y; |
205 |
if (d > 1.0) |
206 |
return(-1.0); |
207 |
d = sqrt(d); |
208 |
z = cos(PI*d); |
209 |
d = d <= FTINY ? PI : sqrt(1.0 - z*z)/d; |
210 |
x *= d; |
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y *= d; |
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direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
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direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
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direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
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orig[0] = v->vp[0] + v->vfore*direc[0]; |
216 |
orig[1] = v->vp[1] + v->vfore*direc[1]; |
217 |
orig[2] = v->vp[2] + v->vfore*direc[2]; |
218 |
return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
219 |
case VT_PLS: /* planispheric fisheye */ |
220 |
x *= sqrt(v->hn2); |
221 |
y *= sqrt(v->vn2); |
222 |
d = x*x + y*y; |
223 |
z = (1. - d)/(1. + d); |
224 |
d = d <= FTINY*FTINY ? PI : sqrt((1.0 - z*z)/d); |
225 |
x *= d; |
226 |
y *= d; |
227 |
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
228 |
direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
229 |
direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
230 |
orig[0] = v->vp[0] + v->vfore*direc[0]; |
231 |
orig[1] = v->vp[1] + v->vfore*direc[1]; |
232 |
orig[2] = v->vp[2] + v->vfore*direc[2]; |
233 |
return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
234 |
} |
235 |
return(-1.0); |
236 |
} |
237 |
|
238 |
|
239 |
void |
240 |
viewloc( /* find image location for point */ |
241 |
FVECT ip, |
242 |
VIEW *v, |
243 |
FVECT p |
244 |
) |
245 |
{ |
246 |
double d, d2; |
247 |
FVECT disp; |
248 |
|
249 |
VSUB(disp, p, v->vp); |
250 |
|
251 |
switch (v->type) { |
252 |
case VT_PAR: /* parallel view */ |
253 |
ip[2] = DOT(disp,v->vdir) - v->vfore; |
254 |
break; |
255 |
case VT_PER: /* perspective view */ |
256 |
d = DOT(disp,v->vdir); |
257 |
ip[2] = VLEN(disp); |
258 |
if (d < 0.0) { /* fold pyramid */ |
259 |
ip[2] = -ip[2]; |
260 |
d = -d; |
261 |
} |
262 |
if (d > FTINY) { |
263 |
d = 1.0/d; |
264 |
disp[0] *= d; |
265 |
disp[1] *= d; |
266 |
disp[2] *= d; |
267 |
} |
268 |
ip[2] *= (1.0 - v->vfore*d); |
269 |
break; |
270 |
case VT_HEM: /* hemispherical fisheye */ |
271 |
d = normalize(disp); |
272 |
if (DOT(disp,v->vdir) < 0.0) |
273 |
ip[2] = -d; |
274 |
else |
275 |
ip[2] = d; |
276 |
ip[2] -= v->vfore; |
277 |
break; |
278 |
case VT_CYL: /* cylindrical panorama */ |
279 |
d = DOT(disp,v->hvec); |
280 |
d2 = DOT(disp,v->vdir); |
281 |
ip[0] = 180.0/PI * atan2(d,d2) / v->horiz + 0.5 - v->hoff; |
282 |
d = 1.0/sqrt(d*d + d2*d2); |
283 |
ip[1] = DOT(disp,v->vvec)*d/v->vn2 + 0.5 - v->voff; |
284 |
ip[2] = VLEN(disp); |
285 |
ip[2] *= (1.0 - v->vfore*d); |
286 |
return; |
287 |
case VT_ANG: /* angular fisheye */ |
288 |
ip[0] = 0.5 - v->hoff; |
289 |
ip[1] = 0.5 - v->voff; |
290 |
ip[2] = normalize(disp) - v->vfore; |
291 |
d = DOT(disp,v->vdir); |
292 |
if (d >= 1.0-FTINY) |
293 |
return; |
294 |
if (d <= -(1.0-FTINY)) { |
295 |
ip[0] += 180.0/v->horiz; |
296 |
return; |
297 |
} |
298 |
d = (180.0/PI)*acos(d) / sqrt(1.0 - d*d); |
299 |
ip[0] += DOT(disp,v->hvec)*d/v->horiz; |
300 |
ip[1] += DOT(disp,v->vvec)*d/v->vert; |
301 |
return; |
302 |
case VT_PLS: /* planispheric fisheye */ |
303 |
ip[0] = 0.5 - v->hoff; |
304 |
ip[1] = 0.5 - v->voff; |
305 |
ip[2] = normalize(disp) - v->vfore; |
306 |
d = DOT(disp,v->vdir); |
307 |
if (d >= 1.0-FTINY) |
308 |
return; |
309 |
if (d <= -(1.0-FTINY)) |
310 |
return; /* really an error */ |
311 |
d = sqrt(1.0 - d*d) / (1.0 + d); |
312 |
ip[0] += DOT(disp,v->hvec)*d/sqrt(v->hn2); |
313 |
ip[1] += DOT(disp,v->vvec)*d/sqrt(v->vn2); |
314 |
return; |
315 |
} |
316 |
ip[0] = DOT(disp,v->hvec)/v->hn2 + 0.5 - v->hoff; |
317 |
ip[1] = DOT(disp,v->vvec)/v->vn2 + 0.5 - v->voff; |
318 |
} |
319 |
|
320 |
|
321 |
void |
322 |
pix2loc( /* compute image location from pixel pos. */ |
323 |
RREAL loc[2], |
324 |
RESOLU *rp, |
325 |
int px, |
326 |
int py |
327 |
) |
328 |
{ |
329 |
int x, y; |
330 |
|
331 |
if (rp->rt & YMAJOR) { |
332 |
x = px; |
333 |
y = py; |
334 |
} else { |
335 |
x = py; |
336 |
y = px; |
337 |
} |
338 |
if (rp->rt & XDECR) |
339 |
x = rp->xr-1 - x; |
340 |
if (rp->rt & YDECR) |
341 |
y = rp->yr-1 - y; |
342 |
loc[0] = (x+.5)/rp->xr; |
343 |
loc[1] = (y+.5)/rp->yr; |
344 |
} |
345 |
|
346 |
|
347 |
void |
348 |
loc2pix( /* compute pixel pos. from image location */ |
349 |
int pp[2], |
350 |
RESOLU *rp, |
351 |
double lx, |
352 |
double ly |
353 |
) |
354 |
{ |
355 |
int x, y; |
356 |
|
357 |
x = (lx >= 0.0) ? (int)(lx * rp->xr) : -(int)(-lx * rp->xr); |
358 |
y = (ly >= 0.0) ? (int)(ly * rp->yr) : -(int)(-ly * rp->yr); |
359 |
if (rp->rt & XDECR) |
360 |
x = rp->xr-1 - x; |
361 |
if (rp->rt & YDECR) |
362 |
y = rp->yr-1 - y; |
363 |
if (rp->rt & YMAJOR) { |
364 |
pp[0] = x; |
365 |
pp[1] = y; |
366 |
} else { |
367 |
pp[0] = y; |
368 |
pp[1] = x; |
369 |
} |
370 |
} |
371 |
|
372 |
|
373 |
int |
374 |
getviewopt( /* process view argument */ |
375 |
VIEW *v, |
376 |
int ac, |
377 |
char *av[] |
378 |
) |
379 |
{ |
380 |
#define check(c,l) if ((av[0][c]&&av[0][c]!=' ') || \ |
381 |
badarg(ac-1,av+1,l)) return(-1) |
382 |
|
383 |
if (ac <= 0 || av[0][0] != '-' || av[0][1] != 'v') |
384 |
return(-1); |
385 |
switch (av[0][2]) { |
386 |
case 't': /* type */ |
387 |
if (!av[0][3] || av[0][3]==' ') |
388 |
return(-1); |
389 |
check(4,""); |
390 |
v->type = av[0][3]; |
391 |
return(0); |
392 |
case 'p': /* point */ |
393 |
check(3,"fff"); |
394 |
v->vp[0] = atof(av[1]); |
395 |
v->vp[1] = atof(av[2]); |
396 |
v->vp[2] = atof(av[3]); |
397 |
return(3); |
398 |
case 'd': /* direction */ |
399 |
check(3,"fff"); |
400 |
v->vdir[0] = atof(av[1]); |
401 |
v->vdir[1] = atof(av[2]); |
402 |
v->vdir[2] = atof(av[3]); |
403 |
v->vdist = 1.; |
404 |
return(3); |
405 |
case 'u': /* up */ |
406 |
check(3,"fff"); |
407 |
v->vup[0] = atof(av[1]); |
408 |
v->vup[1] = atof(av[2]); |
409 |
v->vup[2] = atof(av[3]); |
410 |
return(3); |
411 |
case 'h': /* horizontal size */ |
412 |
check(3,"f"); |
413 |
v->horiz = atof(av[1]); |
414 |
return(1); |
415 |
case 'v': /* vertical size */ |
416 |
check(3,"f"); |
417 |
v->vert = atof(av[1]); |
418 |
return(1); |
419 |
case 'o': /* fore clipping plane */ |
420 |
check(3,"f"); |
421 |
v->vfore = atof(av[1]); |
422 |
return(1); |
423 |
case 'a': /* aft clipping plane */ |
424 |
check(3,"f"); |
425 |
v->vaft = atof(av[1]); |
426 |
return(1); |
427 |
case 's': /* shift */ |
428 |
check(3,"f"); |
429 |
v->hoff = atof(av[1]); |
430 |
return(1); |
431 |
case 'l': /* lift */ |
432 |
check(3,"f"); |
433 |
v->voff = atof(av[1]); |
434 |
return(1); |
435 |
default: |
436 |
return(-1); |
437 |
} |
438 |
#undef check |
439 |
} |
440 |
|
441 |
|
442 |
int |
443 |
sscanview( /* get view parameters from string */ |
444 |
VIEW *vp, |
445 |
char *s |
446 |
) |
447 |
{ |
448 |
int ac; |
449 |
char *av[4]; |
450 |
int na; |
451 |
int nvopts = 0; |
452 |
|
453 |
while (isspace(*s)) |
454 |
if (!*s++) |
455 |
return(0); |
456 |
while (*s) { |
457 |
ac = 0; |
458 |
do { |
459 |
if (ac || *s == '-') |
460 |
av[ac++] = s; |
461 |
while (*s && !isspace(*s)) |
462 |
s++; |
463 |
while (isspace(*s)) |
464 |
s++; |
465 |
} while (*s && ac < 4); |
466 |
if ((na = getviewopt(vp, ac, av)) >= 0) { |
467 |
if (na+1 < ac) |
468 |
s = av[na+1]; |
469 |
nvopts++; |
470 |
} else if (ac > 1) |
471 |
s = av[1]; |
472 |
} |
473 |
return(nvopts); |
474 |
} |
475 |
|
476 |
|
477 |
void |
478 |
fprintview( /* write out view parameters */ |
479 |
VIEW *vp, |
480 |
FILE *fp |
481 |
) |
482 |
{ |
483 |
fprintf(fp, " -vt%c", vp->type); |
484 |
fprintf(fp, " -vp %.6g %.6g %.6g", vp->vp[0], vp->vp[1], vp->vp[2]); |
485 |
fprintf(fp, " -vd %.6g %.6g %.6g", vp->vdir[0]*vp->vdist, |
486 |
vp->vdir[1]*vp->vdist, |
487 |
vp->vdir[2]*vp->vdist); |
488 |
fprintf(fp, " -vu %.6g %.6g %.6g", vp->vup[0], vp->vup[1], vp->vup[2]); |
489 |
fprintf(fp, " -vh %.6g -vv %.6g", vp->horiz, vp->vert); |
490 |
fprintf(fp, " -vo %.6g -va %.6g", vp->vfore, vp->vaft); |
491 |
fprintf(fp, " -vs %.6g -vl %.6g", vp->hoff, vp->voff); |
492 |
} |
493 |
|
494 |
|
495 |
char * |
496 |
viewopt( /* translate to minimal view string */ |
497 |
VIEW *vp |
498 |
) |
499 |
{ |
500 |
static char vwstr[128]; |
501 |
char *cp = vwstr; |
502 |
|
503 |
*cp = '\0'; |
504 |
if (vp->type != stdview.type) { |
505 |
sprintf(cp, " -vt%c", vp->type); |
506 |
cp += strlen(cp); |
507 |
} |
508 |
if (!VEQ(vp->vp,stdview.vp)) { |
509 |
sprintf(cp, " -vp %.6g %.6g %.6g", |
510 |
vp->vp[0], vp->vp[1], vp->vp[2]); |
511 |
cp += strlen(cp); |
512 |
} |
513 |
if (!FEQ(vp->vdist,stdview.vdist) || !VEQ(vp->vdir,stdview.vdir)) { |
514 |
sprintf(cp, " -vd %.6g %.6g %.6g", |
515 |
vp->vdir[0]*vp->vdist, |
516 |
vp->vdir[1]*vp->vdist, |
517 |
vp->vdir[2]*vp->vdist); |
518 |
cp += strlen(cp); |
519 |
} |
520 |
if (!VEQ(vp->vup,stdview.vup)) { |
521 |
sprintf(cp, " -vu %.6g %.6g %.6g", |
522 |
vp->vup[0], vp->vup[1], vp->vup[2]); |
523 |
cp += strlen(cp); |
524 |
} |
525 |
if (!FEQ(vp->horiz,stdview.horiz)) { |
526 |
sprintf(cp, " -vh %.6g", vp->horiz); |
527 |
cp += strlen(cp); |
528 |
} |
529 |
if (!FEQ(vp->vert,stdview.vert)) { |
530 |
sprintf(cp, " -vv %.6g", vp->vert); |
531 |
cp += strlen(cp); |
532 |
} |
533 |
if (!FEQ(vp->vfore,stdview.vfore)) { |
534 |
sprintf(cp, " -vo %.6g", vp->vfore); |
535 |
cp += strlen(cp); |
536 |
} |
537 |
if (!FEQ(vp->vaft,stdview.vaft)) { |
538 |
sprintf(cp, " -va %.6g", vp->vaft); |
539 |
cp += strlen(cp); |
540 |
} |
541 |
if (!FEQ(vp->hoff,stdview.hoff)) { |
542 |
sprintf(cp, " -vs %.6g", vp->hoff); |
543 |
cp += strlen(cp); |
544 |
} |
545 |
if (!FEQ(vp->voff,stdview.voff)) { |
546 |
sprintf(cp, " -vl %.6g", vp->voff); |
547 |
cp += strlen(cp); |
548 |
} |
549 |
return(vwstr); |
550 |
} |
551 |
|
552 |
|
553 |
int |
554 |
isview( /* is this a view string? */ |
555 |
char *s |
556 |
) |
557 |
{ |
558 |
static char *altname[]={NULL,VIEWSTR,"rpict","rview","rvu","rpiece","pinterp",NULL}; |
559 |
extern char *progname; |
560 |
char *cp; |
561 |
char **an; |
562 |
/* add program name to list */ |
563 |
if (altname[0] == NULL) { |
564 |
for (cp = progname; *cp; cp++) |
565 |
; |
566 |
while (cp > progname && !ISDIRSEP(cp[-1])) |
567 |
cp--; |
568 |
altname[0] = cp; |
569 |
} |
570 |
/* skip leading path */ |
571 |
cp = s; |
572 |
while (*cp && *cp != ' ') |
573 |
cp++; |
574 |
while (cp > s && !ISDIRSEP(cp[-1])) |
575 |
cp--; |
576 |
for (an = altname; *an != NULL; an++) |
577 |
if (!strncmp(*an, cp, strlen(*an))) |
578 |
return(1); |
579 |
return(0); |
580 |
} |
581 |
|
582 |
|
583 |
struct myview { |
584 |
VIEW *hv; |
585 |
int ok; |
586 |
}; |
587 |
|
588 |
|
589 |
static int |
590 |
gethview( /* get view from header */ |
591 |
char *s, |
592 |
void *v |
593 |
) |
594 |
{ |
595 |
if (isview(s) && sscanview(((struct myview*)v)->hv, s) > 0) |
596 |
((struct myview*)v)->ok++; |
597 |
return(0); |
598 |
} |
599 |
|
600 |
|
601 |
int |
602 |
viewfile( /* get view from file */ |
603 |
char *fname, |
604 |
VIEW *vp, |
605 |
RESOLU *rp |
606 |
) |
607 |
{ |
608 |
struct myview mvs; |
609 |
FILE *fp; |
610 |
|
611 |
if (fname == NULL || !strcmp(fname, "-")) |
612 |
fp = stdin; |
613 |
else if ((fp = fopen(fname, "r")) == NULL) |
614 |
return(-1); |
615 |
|
616 |
mvs.hv = vp; |
617 |
mvs.ok = 0; |
618 |
|
619 |
getheader(fp, gethview, &mvs); |
620 |
|
621 |
if (rp != NULL && !fgetsresolu(rp, fp)) |
622 |
mvs.ok = 0; |
623 |
|
624 |
fclose(fp); |
625 |
|
626 |
return(mvs.ok); |
627 |
} |