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/* Copyright (c) 1991 Regents of the University of California */ |
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/* Copyright (c) 1994 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 "resolu.h" |
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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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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->vfore < -FTINY || v->vaft < -FTINY || |
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(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 (normalize(v->vdir) == 0.0) /* normalize direction */ |
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return("zero view direction"); |
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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 / 90.0; |
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v->vn2 = v->vert / 90.0; |
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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("unknown view type"); |
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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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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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double |
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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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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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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(0); |
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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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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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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; |
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if (z < 0.0) |
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return(-1); |
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return(-1.0); |
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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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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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return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
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case VT_CYL: /* cylindrical panorama */ |
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d = x * v->horiz * (PI/180.0); |
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z = cos(d); |
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x = sin(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]; |
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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_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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return(-1.0); |
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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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d = d <= FTINY ? PI : 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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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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return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
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} |
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return(-1); |
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return(-1.0); |
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} |
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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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ip[2] = DOT(disp,v->vdir) - v->vfore; |
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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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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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} |
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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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ip[2] *= (1.0 - v->vfore*d); |
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break; |
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case VT_HEM: /* hemispherical fisheye */ |
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d = normalize(disp); |
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ip[2] = -d; |
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else |
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ip[2] = d; |
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ip[2] -= v->vfore; |
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break; |
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case VT_CYL: /* cylindrical panorama */ |
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ip[2] = DOT(disp,v->vdir); |
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d = DOT(disp,v->hvec); |
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ip[0] = 180.0/PI * atan2(ip[2],d) / v->horiz + 0.5 - v->hoff; |
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ip[1] = DOT(disp,v->vvec)/v->vn2 + 0.5 - v->voff; |
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if (v->vfore > FTINY) |
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ip[2] = sqrt(DOT(disp,disp)) * |
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(1.0 - v->vfore/sqrt(d*d + ip[2]*ip[2])); |
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else |
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ip[2] = sqrt(DOT(disp,disp)); |
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return; |
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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; |
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ip[2] = normalize(disp); |
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ip[2] = normalize(disp) - v->vfore; |
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d = DOT(disp,v->vdir); |
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if (d >= 1.0-FTINY) |
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return; |
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if (d <= -(1.0-FTINY)) { |
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ip[1] += 180.0/v->horiz; |
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ip[2] += 180.0/v->vert; |
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ip[0] += 180.0/v->horiz; |
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return; |
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} |
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d = acos(d)/PI / sqrt(1.0 - d*d); |
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{ |
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#define check(c,l) if ((av[0][c]&&av[0][c]!=' ') || \ |
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badarg(ac-1,av+1,l)) return(-1) |
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extern double atof(); |
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if (ac <= 0 || av[0][0] != '-' || av[0][1] != 'v') |
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return(-1); |
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check(3,"f"); |
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v->vert = atof(av[1]); |
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return(1); |
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case 'o': /* fore clipping plane */ |
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check(3,"f"); |
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v->vfore = atof(av[1]); |
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return(1); |
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case 'a': /* aft clipping plane */ |
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check(3,"f"); |
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v->vaft = atof(av[1]); |
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return(1); |
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case 's': /* shift */ |
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check(3,"f"); |
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v->hoff = atof(av[1]); |
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int na; |
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int nvopts = 0; |
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while (*s == ' ') |
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s++; |
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if (*s != '-') |
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s = sskip(s); |
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while (*s) { |
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ac = 0; |
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do { |
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fprintf(fp, " -vd %.6g %.6g %.6g", vp->vdir[0], vp->vdir[1], vp->vdir[2]); |
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fprintf(fp, " -vu %.6g %.6g %.6g", vp->vup[0], vp->vup[1], vp->vup[2]); |
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fprintf(fp, " -vh %.6g -vv %.6g", vp->horiz, vp->vert); |
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fprintf(fp, " -vo %.6g -va %.6g", vp->vfore, vp->vaft); |
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fprintf(fp, " -vs %.6g -vl %.6g", vp->hoff, vp->voff); |
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} |
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static char *altname[] = {NULL,"rpict","rview","pinterp",VIEWSTR,NULL}; |
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int |
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isview(s) /* is this a view string? */ |
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char *s; |
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{ |
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static char *altname[]={NULL,VIEWSTR,"rpict","rview","pinterp",NULL}; |
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extern char *progname; |
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register char *cp; |
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register char **an; |
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/* add program name to list */ |
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if (altname[0] == NULL) { |
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for (cp = progname; *cp; cp++) |
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; |
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while (cp > progname && !ISDIRSEP(cp[-1])) |
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cp--; |
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altname[0] = cp; |
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} |
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/* skip leading path */ |
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cp = s; |
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while (*cp && *cp != ' ') |
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cp++; |
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while (cp > s && !ISDIRSEP(cp[-1])) |
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cp--; |
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for (an = altname; *an != NULL; an++) |
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if (!strncmp(*an, cp, strlen(*an))) |
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return(1); |
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return(0); |
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} |
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|
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struct myview { |
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VIEW *hv; |
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int ok; |
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char *s; |
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register struct myview *v; |
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{ |
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register char **an; |
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for (an = altname; *an != NULL; an++) |
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if (!strncmp(*an, s, strlen(*an))) { |
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if (sscanview(v->hv, s+strlen(*an)) > 0) |
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v->ok++; |
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return; |
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} |
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if (isview(s) && sscanview(v->hv, s) > 0) |
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v->ok++; |
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} |
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VIEW *vp; |
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RESOLU *rp; |
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{ |
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extern char *progname; |
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struct myview mvs; |
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FILE *fp; |
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if ((fp = fopen(fname, "r")) == NULL) |
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return(-1); |
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altname[0] = progname; |
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mvs.hv = vp; |
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mvs.ok = 0; |
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