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/* Copyright (c) 1996 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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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* image.c - routines for image generation. |
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* |
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* External symbols declared in view.h |
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*/ |
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#include "standard.h" |
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#include "copyright.h" |
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#include <ctype.h> |
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#include "rtio.h" |
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#include "rtmath.h" |
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#include "paths.h" |
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#include "view.h" |
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#include "resolu.h" |
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#include "paths.h" |
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#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]) \ |
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&& FEQ((v)[2],(w)[2])) |
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VIEW stdview = STDVIEW; /* default view parameters */ |
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static gethfunc gethview; |
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char * |
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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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setview( /* set hvec and vvec, return message on error */ |
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VIEW *v |
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) |
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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->vfore < -FTINY || v->vaft < -FTINY || |
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(v->vaft > FTINY && v->vaft <= v->vfore)) |
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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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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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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) { |
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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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} |
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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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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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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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double x, y; |
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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; |
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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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VSUM(orig, v->vp, direc, v->vfore); |
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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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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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VSUM(orig, v->vp, direc, v->vfore); |
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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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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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VSUM(orig, v->vp, direc, v->vfore); |
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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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x *= (1.0/180.0)*v->horiz; |
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y *= (1.0/180.0)*v->vert; |
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d = x*x + y*y; |
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if (d > 1.0) |
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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 = d <= FTINY ? PI : sqrt(1 - z*z)/d; |
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d = d <= FTINY ? PI : sqrt(1.0 - 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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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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VSUM(orig, v->vp, direc, v->vfore); |
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return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
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case VT_PLS: /* planispheric fisheye */ |
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x *= sqrt(v->hn2); |
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y *= sqrt(v->vn2); |
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d = x*x + y*y; |
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z = (1. - d)/(1. + d); |
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x *= (1. + z); |
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y *= (1. + z); |
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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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VSUM(orig, v->vp, direc, v->vfore); |
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return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
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} |
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return(-1.0); |
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} |
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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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int |
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viewloc( /* find image location for point */ |
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FVECT ip, |
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VIEW *v, |
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FVECT p |
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) |
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{ |
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double d, d2; |
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FVECT disp; |
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disp[0] = p[0] - v->vp[0]; |
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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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VSUB(disp, p, v->vp); |
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switch (v->type) { |
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case VT_PAR: /* parallel view */ |
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ip[2] = -ip[2]; |
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d = -d; |
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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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> |
if (d <= FTINY) |
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> |
return(0); /* at infinite edge */ |
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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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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 = DOT(disp,v->hvec); |
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d2 = DOT(disp,v->vdir); |
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ip[0] = 180.0/PI * atan2(d,d2) / v->horiz + 0.5 - v->hoff; |
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< |
d = 1.0/sqrt(d*d + d2*d2); |
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> |
d = d*d + d2*d2; |
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> |
if (d <= FTINY*FTINY) |
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> |
return(0); /* at pole */ |
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> |
d = 1.0/sqrt(d); |
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ip[1] = DOT(disp,v->vvec)*d/v->vn2 + 0.5 - v->voff; |
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ip[2] = VLEN(disp); |
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< |
if (v->vfore > FTINY) |
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< |
ip[2] *= (1.0 - v->vfore*d); |
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< |
return; |
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> |
ip[2] *= (1.0 - v->vfore*d); |
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> |
return(1); |
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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) - 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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> |
return(1); |
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if (d <= -(1.0-FTINY)) { |
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ip[0] += 180.0/v->horiz; |
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< |
return; |
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> |
return(1); |
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} |
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< |
d = acos(d)/PI / sqrt(1.0 - d*d); |
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< |
ip[0] += DOT(disp,v->hvec)*d*180.0/v->horiz; |
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< |
ip[1] += DOT(disp,v->vvec)*d*180.0/v->vert; |
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< |
return; |
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> |
d = (180.0/PI)*acos(d) / sqrt(1.0 - d*d); |
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> |
ip[0] += DOT(disp,v->hvec)*d/v->horiz; |
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> |
ip[1] += DOT(disp,v->vvec)*d/v->vert; |
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> |
return(1); |
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> |
case VT_PLS: /* planispheric 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) - 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(1); |
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> |
if (d <= -(1.0-FTINY)) |
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> |
return(0); |
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> |
ip[0] += DOT(disp,v->hvec)/((1. + d)*sqrt(v->hn2)); |
| 305 |
> |
ip[1] += DOT(disp,v->vvec)/((1. + d)*sqrt(v->vn2)); |
| 306 |
> |
return(1); |
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} |
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ip[0] = DOT(disp,v->hvec)/v->hn2 + 0.5 - v->hoff; |
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ip[1] = DOT(disp,v->vvec)/v->vn2 + 0.5 - v->voff; |
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+ |
return(1); |
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} |
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|
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|
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< |
pix2loc(loc, rp, px, py) /* compute image location from pixel pos. */ |
| 315 |
< |
FLOAT loc[2]; |
| 316 |
< |
register RESOLU *rp; |
| 317 |
< |
int px, py; |
| 314 |
> |
void |
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> |
pix2loc( /* compute image location from pixel pos. */ |
| 316 |
> |
RREAL loc[2], |
| 317 |
> |
RESOLU *rp, |
| 318 |
> |
int px, |
| 319 |
> |
int py |
| 320 |
> |
) |
| 321 |
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{ |
| 322 |
< |
register int x, y; |
| 322 |
> |
int x, y; |
| 323 |
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|
| 324 |
< |
if (rp->or & YMAJOR) { |
| 324 |
> |
if (rp->rt & YMAJOR) { |
| 325 |
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x = px; |
| 326 |
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y = py; |
| 327 |
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} else { |
| 328 |
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x = py; |
| 329 |
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y = px; |
| 330 |
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} |
| 331 |
< |
if (rp->or & XDECR) |
| 331 |
> |
if (rp->rt & XDECR) |
| 332 |
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x = rp->xr-1 - x; |
| 333 |
< |
if (rp->or & YDECR) |
| 333 |
> |
if (rp->rt & YDECR) |
| 334 |
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y = rp->yr-1 - y; |
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loc[0] = (x+.5)/rp->xr; |
| 336 |
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loc[1] = (y+.5)/rp->yr; |
| 337 |
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} |
| 338 |
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|
| 339 |
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|
| 340 |
< |
loc2pix(pp, rp, lx, ly) /* compute pixel pos. from image location */ |
| 341 |
< |
int pp[2]; |
| 342 |
< |
register RESOLU *rp; |
| 343 |
< |
double lx, ly; |
| 340 |
> |
void |
| 341 |
> |
loc2pix( /* compute pixel pos. from image location */ |
| 342 |
> |
int pp[2], |
| 343 |
> |
RESOLU *rp, |
| 344 |
> |
double lx, |
| 345 |
> |
double ly |
| 346 |
> |
) |
| 347 |
|
{ |
| 348 |
< |
register int x, y; |
| 348 |
> |
int x, y; |
| 349 |
|
|
| 350 |
< |
x = lx * rp->xr; |
| 351 |
< |
y = ly * rp->yr; |
| 352 |
< |
if (rp->or & XDECR) |
| 350 |
> |
x = (int)(lx*rp->xr + .5 - (lx < 0.0)); |
| 351 |
> |
y = (int)(ly*rp->yr + .5 - (ly < 0.0)); |
| 352 |
> |
|
| 353 |
> |
if (rp->rt & XDECR) |
| 354 |
|
x = rp->xr-1 - x; |
| 355 |
< |
if (rp->or & YDECR) |
| 355 |
> |
if (rp->rt & YDECR) |
| 356 |
|
y = rp->yr-1 - y; |
| 357 |
< |
if (rp->or & YMAJOR) { |
| 357 |
> |
if (rp->rt & YMAJOR) { |
| 358 |
|
pp[0] = x; |
| 359 |
|
pp[1] = y; |
| 360 |
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} else { |
| 365 |
|
|
| 366 |
|
|
| 367 |
|
int |
| 368 |
< |
getviewopt(v, ac, av) /* process view argument */ |
| 369 |
< |
register VIEW *v; |
| 370 |
< |
int ac; |
| 371 |
< |
register char *av[]; |
| 368 |
> |
getviewopt( /* process view argument */ |
| 369 |
> |
VIEW *v, |
| 370 |
> |
int ac, |
| 371 |
> |
char *av[] |
| 372 |
> |
) |
| 373 |
|
{ |
| 374 |
|
#define check(c,l) if ((av[0][c]&&av[0][c]!=' ') || \ |
| 375 |
|
badarg(ac-1,av+1,l)) return(-1) |
| 394 |
|
v->vdir[0] = atof(av[1]); |
| 395 |
|
v->vdir[1] = atof(av[2]); |
| 396 |
|
v->vdir[2] = atof(av[3]); |
| 397 |
+ |
v->vdist = 1.; |
| 398 |
|
return(3); |
| 399 |
|
case 'u': /* up */ |
| 400 |
|
check(3,"fff"); |
| 434 |
|
|
| 435 |
|
|
| 436 |
|
int |
| 437 |
< |
sscanview(vp, s) /* get view parameters from string */ |
| 438 |
< |
VIEW *vp; |
| 439 |
< |
register char *s; |
| 437 |
> |
sscanview( /* get view parameters from string */ |
| 438 |
> |
VIEW *vp, |
| 439 |
> |
char *s |
| 440 |
> |
) |
| 441 |
|
{ |
| 442 |
|
int ac; |
| 443 |
|
char *av[4]; |
| 444 |
|
int na; |
| 445 |
|
int nvopts = 0; |
| 446 |
|
|
| 447 |
< |
if (*s != '-') |
| 448 |
< |
s = sskip2(s,1); |
| 447 |
> |
while (isspace(*s)) |
| 448 |
> |
if (!*s++) |
| 449 |
> |
return(0); |
| 450 |
|
while (*s) { |
| 451 |
|
ac = 0; |
| 452 |
|
do { |
| 453 |
< |
av[ac++] = s; |
| 454 |
< |
while (*s && *s != ' ') |
| 453 |
> |
if (ac || *s == '-') |
| 454 |
> |
av[ac++] = s; |
| 455 |
> |
while (*s && !isspace(*s)) |
| 456 |
|
s++; |
| 457 |
< |
while (*s == ' ') |
| 457 |
> |
while (isspace(*s)) |
| 458 |
|
s++; |
| 459 |
|
} while (*s && ac < 4); |
| 460 |
|
if ((na = getviewopt(vp, ac, av)) >= 0) { |
| 468 |
|
} |
| 469 |
|
|
| 470 |
|
|
| 471 |
< |
fprintview(vp, fp) /* write out view parameters */ |
| 472 |
< |
register VIEW *vp; |
| 473 |
< |
FILE *fp; |
| 471 |
> |
void |
| 472 |
> |
fprintview( /* write out view parameters */ |
| 473 |
> |
VIEW *vp, |
| 474 |
> |
FILE *fp |
| 475 |
> |
) |
| 476 |
|
{ |
| 477 |
|
fprintf(fp, " -vt%c", vp->type); |
| 478 |
|
fprintf(fp, " -vp %.6g %.6g %.6g", vp->vp[0], vp->vp[1], vp->vp[2]); |
| 479 |
< |
fprintf(fp, " -vd %.6g %.6g %.6g", vp->vdir[0], vp->vdir[1], vp->vdir[2]); |
| 479 |
> |
fprintf(fp, " -vd %.6g %.6g %.6g", vp->vdir[0]*vp->vdist, |
| 480 |
> |
vp->vdir[1]*vp->vdist, |
| 481 |
> |
vp->vdir[2]*vp->vdist); |
| 482 |
|
fprintf(fp, " -vu %.6g %.6g %.6g", vp->vup[0], vp->vup[1], vp->vup[2]); |
| 483 |
|
fprintf(fp, " -vh %.6g -vv %.6g", vp->horiz, vp->vert); |
| 484 |
|
fprintf(fp, " -vo %.6g -va %.6g", vp->vfore, vp->vaft); |
| 487 |
|
|
| 488 |
|
|
| 489 |
|
char * |
| 490 |
< |
viewopt(vp) /* translate to minimal view string */ |
| 491 |
< |
register VIEW *vp; |
| 490 |
> |
viewopt( /* translate to minimal view string */ |
| 491 |
> |
VIEW *vp |
| 492 |
> |
) |
| 493 |
|
{ |
| 494 |
|
static char vwstr[128]; |
| 495 |
< |
register char *cp = vwstr; |
| 495 |
> |
char *cp = vwstr; |
| 496 |
|
|
| 497 |
+ |
*cp = '\0'; |
| 498 |
|
if (vp->type != stdview.type) { |
| 499 |
|
sprintf(cp, " -vt%c", vp->type); |
| 500 |
|
cp += strlen(cp); |
| 504 |
|
vp->vp[0], vp->vp[1], vp->vp[2]); |
| 505 |
|
cp += strlen(cp); |
| 506 |
|
} |
| 507 |
< |
if (!VEQ(vp->vdir,stdview.vdir)) { |
| 507 |
> |
if (!FEQ(vp->vdist,stdview.vdist) || !VEQ(vp->vdir,stdview.vdir)) { |
| 508 |
|
sprintf(cp, " -vd %.6g %.6g %.6g", |
| 509 |
< |
vp->vdir[0], vp->vdir[1], vp->vdir[2]); |
| 509 |
> |
vp->vdir[0]*vp->vdist, |
| 510 |
> |
vp->vdir[1]*vp->vdist, |
| 511 |
> |
vp->vdir[2]*vp->vdist); |
| 512 |
|
cp += strlen(cp); |
| 513 |
|
} |
| 514 |
|
if (!VEQ(vp->vup,stdview.vup)) { |
| 545 |
|
|
| 546 |
|
|
| 547 |
|
int |
| 548 |
< |
isview(s) /* is this a view string? */ |
| 549 |
< |
char *s; |
| 548 |
> |
isview( /* is this a view string? */ |
| 549 |
> |
char *s |
| 550 |
> |
) |
| 551 |
|
{ |
| 552 |
< |
static char *altname[]={NULL,VIEWSTR,"rpict","rview","pinterp",NULL}; |
| 552 |
> |
static char *altname[]={NULL,VIEWSTR,"rpict","rview","rvu","rpiece","pinterp",NULL}; |
| 553 |
|
extern char *progname; |
| 554 |
< |
register char *cp; |
| 555 |
< |
register char **an; |
| 554 |
> |
char *cp; |
| 555 |
> |
char **an; |
| 556 |
|
/* add program name to list */ |
| 557 |
|
if (altname[0] == NULL) { |
| 558 |
|
for (cp = progname; *cp; cp++) |
| 580 |
|
}; |
| 581 |
|
|
| 582 |
|
|
| 583 |
< |
static |
| 584 |
< |
gethview(s, v) /* get view from header */ |
| 585 |
< |
char *s; |
| 586 |
< |
register struct myview *v; |
| 583 |
> |
static int |
| 584 |
> |
gethview( /* get view from header */ |
| 585 |
> |
char *s, |
| 586 |
> |
void *v |
| 587 |
> |
) |
| 588 |
|
{ |
| 589 |
< |
if (isview(s) && sscanview(v->hv, s) > 0) |
| 590 |
< |
v->ok++; |
| 589 |
> |
if (isview(s) && sscanview(((struct myview*)v)->hv, s) > 0) |
| 590 |
> |
((struct myview*)v)->ok++; |
| 591 |
> |
return(0); |
| 592 |
|
} |
| 593 |
|
|
| 594 |
|
|
| 595 |
|
int |
| 596 |
< |
viewfile(fname, vp, rp) /* get view from file */ |
| 597 |
< |
char *fname; |
| 598 |
< |
VIEW *vp; |
| 599 |
< |
RESOLU *rp; |
| 596 |
> |
viewfile( /* get view from file */ |
| 597 |
> |
char *fname, |
| 598 |
> |
VIEW *vp, |
| 599 |
> |
RESOLU *rp |
| 600 |
> |
) |
| 601 |
|
{ |
| 602 |
|
struct myview mvs; |
| 603 |
|
FILE *fp; |
| 604 |
|
|
| 605 |
< |
if ((fp = fopen(fname, "r")) == NULL) |
| 605 |
> |
if (fname == NULL || !strcmp(fname, "-")) |
| 606 |
> |
fp = stdin; |
| 607 |
> |
else if ((fp = fopen(fname, "r")) == NULL) |
| 608 |
|
return(-1); |
| 609 |
|
|
| 610 |
|
mvs.hv = vp; |