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/* Copyright (c) 1986 Regents of the University of California */ |
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/* Copyright (c) 1992 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#include "view.h" |
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#include "resolu.h" |
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|
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#include "paths.h" |
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|
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VIEW stdview = STDVIEW; /* default view parameters */ |
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|
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|
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setview(v) /* set hvec and vvec, return message on error */ |
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register VIEW *v; |
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{ |
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extern double tan(), normalize(); |
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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 (normalize(v->vdir) == 0.0) /* normalize direction */ |
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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("illegal view up vector"); |
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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->type == VT_PAR) |
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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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else if (v->type == VT_PER) |
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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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else |
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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 / 90.0; |
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v->vn2 = v->vert / 90.0; |
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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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default: |
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return("unknown view type"); |
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|
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if (v->hn2 <= FTINY || v->hn2 >= FHUGE) |
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return("illegal horizontal view size"); |
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|
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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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if (v->type != VT_ANG) { |
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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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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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|
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if (v->type == VT_PAR) |
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v->vn2 = v->vert; |
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else |
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v->vn2 = 2.0 * tan(v->vert*(PI/180.0/2.0)); |
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|
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if (v->vn2 <= FTINY || v->vn2 >= FHUGE) |
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return("illegal vertical view size"); |
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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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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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normaspect(va, ap, xp, yp) /* 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, *yp; /* x and y resolution in (or out if *ap!=0) */ |
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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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viewray(orig, direc, v, x, y) /* compute ray origin and direction */ |
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FVECT orig, direc; |
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register VIEW *v; |
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double x, y; |
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{ |
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double d, z; |
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|
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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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if (v->type == VT_PAR) { /* parallel view */ |
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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] + x*v->hvec[0] + y*v->vvec[0]; |
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orig[1] = v->vp[1] + x*v->hvec[1] + y*v->vvec[1]; |
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orig[2] = v->vp[2] + x*v->hvec[2] + y*v->vvec[2]; |
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VCOPY(direc, v->vdir); |
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} else { /* perspective view */ |
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return(0); |
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case VT_PER: /* perspective view */ |
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VCOPY(orig, v->vp); |
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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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normalize(direc); |
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return(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; |
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if (z < 0.0) |
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return(-1); |
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z = sqrt(z); |
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VCOPY(orig, v->vp); |
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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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return(0); |
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case VT_ANG: /* angular fisheye */ |
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x *= v->horiz/180.0; |
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y *= v->vert/180.0; |
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d = x*x + y*y; |
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if (d > 1.0) |
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return(-1); |
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VCOPY(orig, v->vp); |
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if (d <= FTINY) { |
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VCOPY(direc, v->vdir); |
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return(0); |
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} |
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d = sqrt(d); |
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z = cos(PI*d); |
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d = sqrt(1 - z*z)/d; |
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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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return(0); |
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} |
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return(-1); |
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} |
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viewpixel(xp, yp, zp, v, p) /* find image location for point */ |
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double *xp, *yp, *zp; |
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viewloc(ip, v, p) /* find image location for point */ |
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FVECT ip; |
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register VIEW *v; |
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FVECT p; |
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{ |
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extern double sqrt(); |
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double d; |
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FVECT disp; |
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|
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disp[1] = p[1] - v->vp[1]; |
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disp[2] = p[2] - v->vp[2]; |
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|
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if (v->type == VT_PAR) { /* parallel view */ |
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if (zp != NULL) |
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*zp = DOT(disp,v->vdir); |
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} else { /* perspective view */ |
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d = 1.0/DOT(disp,v->vdir); |
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if (zp != NULL) { |
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*zp = sqrt(DOT(disp,disp)); |
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if (d < 0.0) |
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*zp = -*zp; |
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switch (v->type) { |
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case VT_PAR: /* parallel view */ |
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ip[2] = DOT(disp,v->vdir); |
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break; |
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case VT_PER: /* perspective view */ |
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d = DOT(disp,v->vdir); |
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ip[2] = sqrt(DOT(disp,disp)); |
188 |
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if (d < 0.0) { /* fold pyramid */ |
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ip[2] = -ip[2]; |
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d = -d; |
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} else if (d > FTINY) { |
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d = 1.0/d; |
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disp[0] *= d; |
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disp[1] *= d; |
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disp[2] *= d; |
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} |
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disp[0] *= d; |
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disp[1] *= d; |
199 |
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disp[2] *= d; |
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break; |
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case VT_HEM: /* hemispherical fisheye */ |
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d = normalize(disp); |
200 |
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if (DOT(disp,v->vdir) < 0.0) |
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ip[2] = -d; |
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else |
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ip[2] = d; |
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break; |
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case VT_ANG: /* angular fisheye */ |
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ip[0] = 0.5 - v->hoff; |
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ip[1] = 0.5 - v->voff; |
208 |
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ip[2] = normalize(disp); |
209 |
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d = DOT(disp,v->vdir); |
210 |
> |
if (d >= 1.0-FTINY) |
211 |
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return; |
212 |
> |
if (d <= -(1.0-FTINY)) { |
213 |
> |
ip[1] += 180.0/v->horiz; |
214 |
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ip[2] += 180.0/v->vert; |
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> |
return; |
216 |
> |
} |
217 |
> |
d = acos(d)/PI / sqrt(1.0 - d*d); |
218 |
> |
ip[0] += DOT(disp,v->hvec)*d*180.0/v->horiz; |
219 |
> |
ip[1] += DOT(disp,v->vvec)*d*180.0/v->vert; |
220 |
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return; |
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} |
222 |
< |
*xp = DOT(disp,v->hvec)/v->hn2 + 0.5 - v->hoff; |
223 |
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*yp = DOT(disp,v->vvec)/v->vn2 + 0.5 - v->voff; |
222 |
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ip[0] = DOT(disp,v->hvec)/v->hn2 + 0.5 - v->hoff; |
223 |
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ip[1] = DOT(disp,v->vvec)/v->vn2 + 0.5 - v->voff; |
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} |
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|
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pix2loc(loc, rp, px, py) /* compute image location from pixel pos. */ |
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FLOAT loc[2]; |
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register RESOLU *rp; |
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int px, py; |
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{ |
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register int x, y; |
233 |
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|
234 |
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if (rp->or & YMAJOR) { |
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x = px; |
236 |
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y = py; |
237 |
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} else { |
238 |
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x = py; |
239 |
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y = px; |
240 |
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} |
241 |
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if (rp->or & XDECR) |
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x = rp->xr-1 - x; |
243 |
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if (rp->or & YDECR) |
244 |
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y = rp->yr-1 - y; |
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loc[0] = (x+.5)/rp->xr; |
246 |
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loc[1] = (y+.5)/rp->yr; |
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} |
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|
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|
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loc2pix(pp, rp, lx, ly) /* compute pixel pos. from image location */ |
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int pp[2]; |
252 |
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register RESOLU *rp; |
253 |
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double lx, ly; |
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{ |
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register int x, y; |
256 |
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|
257 |
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x = lx * rp->xr; |
258 |
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y = ly * rp->yr; |
259 |
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if (rp->or & XDECR) |
260 |
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x = rp->xr-1 - x; |
261 |
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if (rp->or & YDECR) |
262 |
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y = rp->yr-1 - y; |
263 |
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if (rp->or & YMAJOR) { |
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pp[0] = x; |
265 |
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pp[1] = y; |
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} else { |
267 |
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pp[0] = y; |
268 |
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pp[1] = x; |
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} |
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} |
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|
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|
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int |
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getviewopt(v, ac, av) /* process view argument */ |
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register VIEW *v; |
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int ac; |
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register char *av[]; |
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{ |
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< |
#define check(c,n) if ((av[0][c]&&av[0][c]!=' ') || n>=ac) return(-1) |
280 |
< |
extern double atof(); |
279 |
> |
#define check(c,l) if ((av[0][c]&&av[0][c]!=' ') || \ |
280 |
> |
badarg(ac-1,av+1,l)) return(-1) |
281 |
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|
282 |
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if (av[0][0] != '-' || av[0][1] != 'v') |
282 |
> |
if (ac <= 0 || av[0][0] != '-' || av[0][1] != 'v') |
283 |
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return(-1); |
284 |
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switch (av[0][2]) { |
285 |
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case 't': /* type */ |
286 |
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if (!av[0][3] || av[0][3]==' ') |
287 |
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return(-1); |
288 |
< |
check(4,0); |
288 |
> |
check(4,""); |
289 |
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v->type = av[0][3]; |
290 |
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return(0); |
291 |
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case 'p': /* point */ |
292 |
< |
check(3,3); |
292 |
> |
check(3,"fff"); |
293 |
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v->vp[0] = atof(av[1]); |
294 |
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v->vp[1] = atof(av[2]); |
295 |
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v->vp[2] = atof(av[3]); |
296 |
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return(3); |
297 |
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case 'd': /* direction */ |
298 |
< |
check(3,3); |
298 |
> |
check(3,"fff"); |
299 |
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v->vdir[0] = atof(av[1]); |
300 |
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v->vdir[1] = atof(av[2]); |
301 |
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v->vdir[2] = atof(av[3]); |
302 |
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return(3); |
303 |
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case 'u': /* up */ |
304 |
< |
check(3,3); |
304 |
> |
check(3,"fff"); |
305 |
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v->vup[0] = atof(av[1]); |
306 |
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v->vup[1] = atof(av[2]); |
307 |
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v->vup[2] = atof(av[3]); |
308 |
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return(3); |
309 |
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case 'h': /* horizontal size */ |
310 |
< |
check(3,1); |
310 |
> |
check(3,"f"); |
311 |
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v->horiz = atof(av[1]); |
312 |
|
return(1); |
313 |
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case 'v': /* vertical size */ |
314 |
< |
check(3,1); |
314 |
> |
check(3,"f"); |
315 |
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v->vert = atof(av[1]); |
316 |
|
return(1); |
317 |
|
case 's': /* shift */ |
318 |
< |
check(3,1); |
318 |
> |
check(3,"f"); |
319 |
|
v->hoff = atof(av[1]); |
320 |
|
return(1); |
321 |
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case 'l': /* lift */ |
322 |
< |
check(3,1); |
322 |
> |
check(3,"f"); |
323 |
|
v->voff = atof(av[1]); |
324 |
|
return(1); |
325 |
|
default: |
339 |
|
int na; |
340 |
|
int nvopts = 0; |
341 |
|
|
342 |
< |
while (*s == ' ') |
343 |
< |
s++; |
344 |
< |
do { |
342 |
> |
if (*s != '-') |
343 |
> |
s = sskip(s); |
344 |
> |
while (*s) { |
345 |
|
ac = 0; |
346 |
|
do { |
347 |
|
av[ac++] = s; |
354 |
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if (na+1 < ac) |
355 |
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s = av[na+1]; |
356 |
|
nvopts++; |
357 |
< |
} |
358 |
< |
} while (*s); |
357 |
> |
} else if (ac > 1) |
358 |
> |
s = av[1]; |
359 |
> |
} |
360 |
|
return(nvopts); |
361 |
|
} |
362 |
|
|
370 |
|
fprintf(fp, " -vd %.6g %.6g %.6g", vp->vdir[0], vp->vdir[1], vp->vdir[2]); |
371 |
|
fprintf(fp, " -vu %.6g %.6g %.6g", vp->vup[0], vp->vup[1], vp->vup[2]); |
372 |
|
fprintf(fp, " -vh %.6g -vv %.6g", vp->horiz, vp->vert); |
373 |
< |
fprintf(fp, " -vs %d -vl %d", vp->hoff, vp->voff); |
373 |
> |
fprintf(fp, " -vs %.6g -vl %.6g", vp->hoff, vp->voff); |
374 |
|
} |
375 |
|
|
376 |
|
|
377 |
< |
static VIEW *hview; /* view from header */ |
378 |
< |
static int gothview; /* success indicator */ |
379 |
< |
static char *altname[] = {NULL,"rpict","rview","pinterp",VIEWSTR,NULL}; |
377 |
> |
int |
378 |
> |
isview(s) /* is this a view string? */ |
379 |
> |
char *s; |
380 |
> |
{ |
381 |
> |
static char *altname[]={NULL,VIEWSTR,"rpict","rview","pinterp",NULL}; |
382 |
> |
extern char *progname; |
383 |
> |
register char *cp; |
384 |
> |
register char **an; |
385 |
> |
/* add program name to list */ |
386 |
> |
if (altname[0] == NULL) { |
387 |
> |
for (cp = progname; *cp; cp++) |
388 |
> |
; |
389 |
> |
while (cp > progname && !ISDIRSEP(cp[-1])) |
390 |
> |
cp--; |
391 |
> |
altname[0] = cp; |
392 |
> |
} |
393 |
> |
/* skip leading path */ |
394 |
> |
cp = s; |
395 |
> |
while (*cp && *cp != ' ') |
396 |
> |
cp++; |
397 |
> |
while (cp > s && !ISDIRSEP(cp[-1])) |
398 |
> |
cp--; |
399 |
> |
for (an = altname; *an != NULL; an++) |
400 |
> |
if (!strncmp(*an, cp, strlen(*an))) |
401 |
> |
return(1); |
402 |
> |
return(0); |
403 |
> |
} |
404 |
|
|
405 |
|
|
406 |
+ |
struct myview { |
407 |
+ |
VIEW *hv; |
408 |
+ |
int ok; |
409 |
+ |
}; |
410 |
+ |
|
411 |
+ |
|
412 |
|
static |
413 |
< |
gethview(s) /* get view from header */ |
413 |
> |
gethview(s, v) /* get view from header */ |
414 |
|
char *s; |
415 |
+ |
register struct myview *v; |
416 |
|
{ |
417 |
< |
register char **an; |
418 |
< |
|
237 |
< |
for (an = altname; *an != NULL; an++) |
238 |
< |
if (!strncmp(*an, s, strlen(*an))) { |
239 |
< |
if (sscanview(hview, s+strlen(*an)) > 0) |
240 |
< |
gothview++; |
241 |
< |
return; |
242 |
< |
} |
417 |
> |
if (isview(s) && sscanview(v->hv, s) > 0) |
418 |
> |
v->ok++; |
419 |
|
} |
420 |
|
|
421 |
|
|
422 |
|
int |
423 |
< |
viewfile(fname, vp) /* get view from file */ |
423 |
> |
viewfile(fname, vp, rp) /* get view from file */ |
424 |
|
char *fname; |
425 |
|
VIEW *vp; |
426 |
+ |
RESOLU *rp; |
427 |
|
{ |
428 |
< |
extern char *progname; |
428 |
> |
struct myview mvs; |
429 |
|
FILE *fp; |
430 |
|
|
431 |
|
if ((fp = fopen(fname, "r")) == NULL) |
432 |
|
return(-1); |
433 |
|
|
434 |
< |
altname[0] = progname; |
435 |
< |
hview = vp; |
259 |
< |
gothview = 0; |
434 |
> |
mvs.hv = vp; |
435 |
> |
mvs.ok = 0; |
436 |
|
|
437 |
< |
getheader(fp, gethview); |
437 |
> |
getheader(fp, gethview, &mvs); |
438 |
|
|
439 |
+ |
if (rp != NULL && !fgetsresolu(rp, fp)) |
440 |
+ |
mvs.ok = 0; |
441 |
+ |
|
442 |
|
fclose(fp); |
443 |
|
|
444 |
< |
return(gothview); |
444 |
> |
return(mvs.ok); |
445 |
|
} |