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/* Copyright (c) 1986 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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/* |
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* image.c - routines for image generation. |
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* |
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* 10/17/85 |
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* External symbols declared in view.h |
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*/ |
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#include <ctype.h> |
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#include "copyright.h" |
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#include "standard.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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VIEW stdview = STDVIEW(512); /* default view parameters */ |
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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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|
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char * |
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sskip(s) /* skip a word */ |
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register char *s; |
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{ |
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while (isspace(*s)) s++; |
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while (*s && !isspace(*s)) s++; |
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return(s); |
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} |
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VIEW stdview = STDVIEW; /* default view parameters */ |
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static gethfunc gethview; |
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|
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char * |
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setview(v) /* set vhinc and vvinc, 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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double tan(), dt; |
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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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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 (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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fcross(v->vhinc, v->vdir, v->vup); /* compute horiz dir */ |
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|
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if (normalize(v->vhinc) == 0.0) |
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return("illegal view up vector"); |
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|
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fcross(v->vvinc, v->vhinc, v->vdir); /* compute vert dir */ |
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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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if (v->type == VT_PAR) |
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dt = v->horiz; |
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else if (v->type == VT_PER) |
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dt = 2.0 * tan(v->horiz*(PI/180.0/2.0)); |
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else |
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return("unknown view type"); |
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fcross(v->hvec, v->vdir, v->vup); /* compute horiz dir */ |
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|
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if (dt <= FTINY || dt >= FHUGE) |
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return("illegal horizontal view size"); |
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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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if (v->hresolu <= 0) |
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return("illegal horizontal resolution"); |
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fcross(v->vvec, v->hvec, v->vdir); /* compute vert dir */ |
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dt /= (double)v->hresolu; |
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v->vhinc[0] *= dt; |
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v->vhinc[1] *= dt; |
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v->vhinc[2] *= dt; |
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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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if (v->type == VT_PAR) |
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dt = v->vert; |
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else |
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dt = 2.0 * tan(v->vert*(PI/180.0/2.0)); |
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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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if (dt <= FTINY || dt >= FHUGE) |
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return("illegal vertical view size"); |
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return(NULL); |
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} |
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if (v->vresolu <= 0) |
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return("illegal vertical resolution"); |
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|
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dt /= (double)v->vresolu; |
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v->vvinc[0] *= dt; |
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v->vvinc[1] *= dt; |
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v->vvinc[2] *= dt; |
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|
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v->vhn2 = DOT(v->vhinc,v->vhinc); |
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v->vvn2 = DOT(v->vvinc,v->vvinc); |
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|
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return(NULL); |
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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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rayview(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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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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x -= 0.5 * v->hresolu; |
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y -= 0.5 * v->vresolu; |
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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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orig[0] = v->vp[0] + x*v->vhinc[0] + y*v->vvinc[0]; |
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orig[1] = v->vp[1] + x*v->vhinc[1] + y*v->vvinc[1]; |
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orig[2] = v->vp[2] + x*v->vhinc[2] + y*v->vvinc[2]; |
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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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} else { /* perspective view */ |
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< |
VCOPY(orig, v->vp); |
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< |
direc[0] = v->vdir[0] + x*v->vhinc[0] + y*v->vvinc[0]; |
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< |
direc[1] = v->vdir[1] + x*v->vhinc[1] + y*v->vvinc[1]; |
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< |
direc[2] = v->vdir[2] + x*v->vhinc[2] + y*v->vvinc[2]; |
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< |
normalize(direc); |
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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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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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> |
z = 1.0 - x*x*v->hn2 - y*y*v->vn2; |
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> |
if (z < 0.0) |
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> |
return(-1.0); |
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> |
z = sqrt(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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> |
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]; |
| 192 |
> |
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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> |
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 *= (1.0/180.0)*v->horiz; |
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> |
y *= (1.0/180.0)*v->vert; |
| 199 |
> |
d = x*x + y*y; |
| 200 |
> |
if (d > 1.0) |
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> |
return(-1.0); |
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> |
d = sqrt(d); |
| 203 |
> |
z = cos(PI*d); |
| 204 |
> |
d = d <= FTINY ? PI : sqrt(1.0 - z*z)/d; |
| 205 |
> |
x *= d; |
| 206 |
> |
y *= d; |
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> |
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
| 208 |
> |
direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
| 209 |
> |
direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
| 210 |
> |
VSUM(orig, v->vp, direc, v->vfore); |
| 211 |
> |
return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
| 212 |
> |
case VT_PLS: /* planispheric fisheye */ |
| 213 |
> |
x *= sqrt(v->hn2); |
| 214 |
> |
y *= sqrt(v->vn2); |
| 215 |
> |
d = x*x + y*y; |
| 216 |
> |
z = (1. - d)/(1. + d); |
| 217 |
> |
x *= (1. + z); |
| 218 |
> |
y *= (1. + z); |
| 219 |
> |
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
| 220 |
> |
direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
| 221 |
> |
direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
| 222 |
> |
VSUM(orig, v->vp, direc, v->vfore); |
| 223 |
> |
return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
| 224 |
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} |
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+ |
return(-1.0); |
| 226 |
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} |
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|
| 228 |
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|
| 229 |
< |
pixelview(xp, yp, zp, v, p) /* find image location for point */ |
| 230 |
< |
double *xp, *yp, *zp; |
| 231 |
< |
register VIEW *v; |
| 232 |
< |
FVECT p; |
| 229 |
> |
int |
| 230 |
> |
viewloc( /* find image location for point */ |
| 231 |
> |
FVECT ip, |
| 232 |
> |
VIEW *v, |
| 233 |
> |
FVECT p |
| 234 |
> |
) /* Use VL_* flags to interpret return value */ |
| 235 |
|
{ |
| 236 |
< |
extern double sqrt(); |
| 237 |
< |
double d; |
| 236 |
> |
int rflags = VL_GOOD; |
| 237 |
> |
double d, d2; |
| 238 |
|
FVECT disp; |
| 120 |
– |
|
| 121 |
– |
disp[0] = p[0] - v->vp[0]; |
| 122 |
– |
disp[1] = p[1] - v->vp[1]; |
| 123 |
– |
disp[2] = p[2] - v->vp[2]; |
| 239 |
|
|
| 240 |
< |
if (v->type == VT_PAR) { /* parallel view */ |
| 241 |
< |
if (zp != NULL) |
| 242 |
< |
*zp = DOT(disp,v->vdir); |
| 243 |
< |
} else { /* perspective view */ |
| 244 |
< |
d = 1.0/DOT(disp,v->vdir); |
| 245 |
< |
if (zp != NULL) { |
| 246 |
< |
*zp = sqrt(DOT(disp,disp)); |
| 247 |
< |
if (d < 0.0) |
| 248 |
< |
*zp = -*zp; |
| 249 |
< |
} |
| 240 |
> |
VSUB(disp, p, v->vp); |
| 241 |
> |
|
| 242 |
> |
switch (v->type) { |
| 243 |
> |
case VT_PAR: /* parallel view */ |
| 244 |
> |
ip[2] = DOT(disp,v->vdir) - v->vfore; |
| 245 |
> |
break; |
| 246 |
> |
case VT_PER: /* perspective view */ |
| 247 |
> |
d = DOT(disp,v->vdir); |
| 248 |
> |
if ((v->vaft > FTINY) & (d >= v->vaft)) |
| 249 |
> |
rflags |= VL_BEYOND; |
| 250 |
> |
ip[2] = VLEN(disp); |
| 251 |
> |
if (d < -FTINY) { /* fold pyramid */ |
| 252 |
> |
ip[2] = -ip[2]; |
| 253 |
> |
d = -d; |
| 254 |
> |
} else if (d <= FTINY) |
| 255 |
> |
return(VL_BAD); /* at infinite edge */ |
| 256 |
> |
d = 1.0/d; |
| 257 |
|
disp[0] *= d; |
| 258 |
|
disp[1] *= d; |
| 259 |
|
disp[2] *= d; |
| 260 |
+ |
if (ip[2] < 0.0) d = -d; |
| 261 |
+ |
ip[2] *= (1.0 - v->vfore*d); |
| 262 |
+ |
break; |
| 263 |
+ |
case VT_HEM: /* hemispherical fisheye */ |
| 264 |
+ |
d = normalize(disp); |
| 265 |
+ |
if (DOT(disp,v->vdir) < 0.0) |
| 266 |
+ |
ip[2] = -d; |
| 267 |
+ |
else |
| 268 |
+ |
ip[2] = d; |
| 269 |
+ |
ip[2] -= v->vfore; |
| 270 |
+ |
break; |
| 271 |
+ |
case VT_CYL: /* cylindrical panorama */ |
| 272 |
+ |
d = DOT(disp,v->hvec); |
| 273 |
+ |
d2 = DOT(disp,v->vdir); |
| 274 |
+ |
ip[0] = 180.0/PI * atan2(d,d2) / v->horiz + 0.5 - v->hoff; |
| 275 |
+ |
d = d*d + d2*d2; |
| 276 |
+ |
if (d <= FTINY*FTINY) |
| 277 |
+ |
return(VL_BAD); /* at pole */ |
| 278 |
+ |
if ((v->vaft > FTINY) & (d >= v->vaft*v->vaft)) |
| 279 |
+ |
rflags |= VL_BEYOND; |
| 280 |
+ |
d = 1.0/sqrt(d); |
| 281 |
+ |
ip[1] = DOT(disp,v->vvec)*d/v->vn2 + 0.5 - v->voff; |
| 282 |
+ |
ip[2] = VLEN(disp); |
| 283 |
+ |
ip[2] *= (1.0 - v->vfore*d); |
| 284 |
+ |
goto gotall; |
| 285 |
+ |
case VT_ANG: /* angular fisheye */ |
| 286 |
+ |
ip[0] = 0.5 - v->hoff; |
| 287 |
+ |
ip[1] = 0.5 - v->voff; |
| 288 |
+ |
ip[2] = normalize(disp) - v->vfore; |
| 289 |
+ |
d = DOT(disp,v->vdir); |
| 290 |
+ |
if (d >= 1.0-FTINY) |
| 291 |
+ |
goto gotall; |
| 292 |
+ |
if (d <= -(1.0-FTINY)) { |
| 293 |
+ |
ip[0] += 180.0/v->horiz; |
| 294 |
+ |
goto gotall; |
| 295 |
+ |
} |
| 296 |
+ |
d = (180.0/PI)*acos(d) / sqrt(1.0 - d*d); |
| 297 |
+ |
ip[0] += DOT(disp,v->hvec)*d/v->horiz; |
| 298 |
+ |
ip[1] += DOT(disp,v->vvec)*d/v->vert; |
| 299 |
+ |
goto gotall; |
| 300 |
+ |
case VT_PLS: /* planispheric fisheye */ |
| 301 |
+ |
ip[0] = 0.5 - v->hoff; |
| 302 |
+ |
ip[1] = 0.5 - v->voff; |
| 303 |
+ |
ip[2] = normalize(disp) - v->vfore; |
| 304 |
+ |
d = DOT(disp,v->vdir); |
| 305 |
+ |
if (d >= 1.0-FTINY) |
| 306 |
+ |
goto gotall; |
| 307 |
+ |
if (d <= -(1.0-FTINY)) |
| 308 |
+ |
return(VL_BAD); |
| 309 |
+ |
ip[0] += DOT(disp,v->hvec)/((1. + d)*sqrt(v->hn2)); |
| 310 |
+ |
ip[1] += DOT(disp,v->vvec)/((1. + d)*sqrt(v->vn2)); |
| 311 |
+ |
goto gotall; |
| 312 |
+ |
default: |
| 313 |
+ |
return(VL_BAD); |
| 314 |
|
} |
| 315 |
< |
*xp = DOT(disp,v->vhinc)/v->vhn2 + 0.5*v->hresolu; |
| 316 |
< |
*yp = DOT(disp,v->vvinc)/v->vvn2 + 0.5*v->vresolu; |
| 315 |
> |
ip[0] = DOT(disp,v->hvec)/v->hn2 + 0.5 - v->hoff; |
| 316 |
> |
ip[1] = DOT(disp,v->vvec)/v->vn2 + 0.5 - v->voff; |
| 317 |
> |
gotall: /* add appropriate return flags */ |
| 318 |
> |
if (ip[2] <= 0.0) |
| 319 |
> |
rflags |= VL_BEHIND; |
| 320 |
> |
else if ((v->type != VT_PER) & (v->type != VT_CYL)) |
| 321 |
> |
rflags |= VL_BEYOND*((v->vaft > FTINY) & |
| 322 |
> |
(ip[2] >= v->vaft - v->vfore)); |
| 323 |
> |
rflags |= VL_OUTSIDE*((0.0 >= ip[0]) | (ip[0] >= 1.0) | |
| 324 |
> |
(0.0 >= ip[1]) | (ip[1] >= 1.0)); |
| 325 |
> |
return(rflags); |
| 326 |
|
} |
| 327 |
|
|
| 328 |
|
|
| 329 |
< |
sscanview(vp, s) /* get view parameters */ |
| 330 |
< |
register VIEW *vp; |
| 331 |
< |
register char *s; |
| 329 |
> |
void |
| 330 |
> |
pix2loc( /* compute image location from pixel pos. */ |
| 331 |
> |
RREAL loc[2], |
| 332 |
> |
RESOLU *rp, |
| 333 |
> |
int px, |
| 334 |
> |
int py |
| 335 |
> |
) |
| 336 |
|
{ |
| 337 |
< |
for ( ; ; ) |
| 338 |
< |
switch (*s++) { |
| 339 |
< |
case '\0': |
| 340 |
< |
case '\n': |
| 337 |
> |
int x, y; |
| 338 |
> |
|
| 339 |
> |
if (rp->rt & YMAJOR) { |
| 340 |
> |
x = px; |
| 341 |
> |
y = py; |
| 342 |
> |
} else { |
| 343 |
> |
x = py; |
| 344 |
> |
y = px; |
| 345 |
> |
} |
| 346 |
> |
if (rp->rt & XDECR) |
| 347 |
> |
x = rp->xr-1 - x; |
| 348 |
> |
if (rp->rt & YDECR) |
| 349 |
> |
y = rp->yr-1 - y; |
| 350 |
> |
loc[0] = (x+.5)/rp->xr; |
| 351 |
> |
loc[1] = (y+.5)/rp->yr; |
| 352 |
> |
} |
| 353 |
> |
|
| 354 |
> |
|
| 355 |
> |
void |
| 356 |
> |
loc2pix( /* compute pixel pos. from image location */ |
| 357 |
> |
int pp[2], |
| 358 |
> |
RESOLU *rp, |
| 359 |
> |
double lx, |
| 360 |
> |
double ly |
| 361 |
> |
) |
| 362 |
> |
{ |
| 363 |
> |
int x, y; |
| 364 |
> |
|
| 365 |
> |
x = (int)(lx*rp->xr + .5 - (lx < 0.0)); |
| 366 |
> |
y = (int)(ly*rp->yr + .5 - (ly < 0.0)); |
| 367 |
> |
|
| 368 |
> |
if (rp->rt & XDECR) |
| 369 |
> |
x = rp->xr-1 - x; |
| 370 |
> |
if (rp->rt & YDECR) |
| 371 |
> |
y = rp->yr-1 - y; |
| 372 |
> |
if (rp->rt & YMAJOR) { |
| 373 |
> |
pp[0] = x; |
| 374 |
> |
pp[1] = y; |
| 375 |
> |
} else { |
| 376 |
> |
pp[0] = y; |
| 377 |
> |
pp[1] = x; |
| 378 |
> |
} |
| 379 |
> |
} |
| 380 |
> |
|
| 381 |
> |
|
| 382 |
> |
int |
| 383 |
> |
getviewopt( /* process view argument */ |
| 384 |
> |
VIEW *v, |
| 385 |
> |
int ac, |
| 386 |
> |
char *av[] |
| 387 |
> |
) |
| 388 |
> |
{ |
| 389 |
> |
#define check(c,l) if ((av[0][c]&&av[0][c]!=' ') || \ |
| 390 |
> |
badarg(ac-1,av+1,l)) return(-1) |
| 391 |
> |
|
| 392 |
> |
if (ac <= 0 || av[0][0] != '-' || av[0][1] != 'v') |
| 393 |
> |
return(-1); |
| 394 |
> |
switch (av[0][2]) { |
| 395 |
> |
case 't': /* type */ |
| 396 |
> |
if (!av[0][3] || av[0][3]==' ') |
| 397 |
> |
return(-1); |
| 398 |
> |
check(4,""); |
| 399 |
> |
v->type = av[0][3]; |
| 400 |
> |
return(0); |
| 401 |
> |
case 'p': /* point */ |
| 402 |
> |
check(3,"fff"); |
| 403 |
> |
v->vp[0] = atof(av[1]); |
| 404 |
> |
v->vp[1] = atof(av[2]); |
| 405 |
> |
v->vp[2] = atof(av[3]); |
| 406 |
> |
return(3); |
| 407 |
> |
case 'd': /* direction */ |
| 408 |
> |
check(3,"fff"); |
| 409 |
> |
v->vdir[0] = atof(av[1]); |
| 410 |
> |
v->vdir[1] = atof(av[2]); |
| 411 |
> |
v->vdir[2] = atof(av[3]); |
| 412 |
> |
v->vdist = 1.; |
| 413 |
> |
return(3); |
| 414 |
> |
case 'u': /* up */ |
| 415 |
> |
check(3,"fff"); |
| 416 |
> |
v->vup[0] = atof(av[1]); |
| 417 |
> |
v->vup[1] = atof(av[2]); |
| 418 |
> |
v->vup[2] = atof(av[3]); |
| 419 |
> |
return(3); |
| 420 |
> |
case 'h': /* horizontal size */ |
| 421 |
> |
check(3,"f"); |
| 422 |
> |
v->horiz = atof(av[1]); |
| 423 |
> |
return(1); |
| 424 |
> |
case 'v': /* vertical size */ |
| 425 |
> |
check(3,"f"); |
| 426 |
> |
v->vert = atof(av[1]); |
| 427 |
> |
return(1); |
| 428 |
> |
case 'o': /* fore clipping plane */ |
| 429 |
> |
check(3,"f"); |
| 430 |
> |
v->vfore = atof(av[1]); |
| 431 |
> |
return(1); |
| 432 |
> |
case 'a': /* aft clipping plane */ |
| 433 |
> |
check(3,"f"); |
| 434 |
> |
v->vaft = atof(av[1]); |
| 435 |
> |
return(1); |
| 436 |
> |
case 's': /* shift */ |
| 437 |
> |
check(3,"f"); |
| 438 |
> |
v->hoff = atof(av[1]); |
| 439 |
> |
return(1); |
| 440 |
> |
case 'l': /* lift */ |
| 441 |
> |
check(3,"f"); |
| 442 |
> |
v->voff = atof(av[1]); |
| 443 |
> |
return(1); |
| 444 |
> |
default: |
| 445 |
> |
return(-1); |
| 446 |
> |
} |
| 447 |
> |
#undef check |
| 448 |
> |
} |
| 449 |
> |
|
| 450 |
> |
|
| 451 |
> |
int |
| 452 |
> |
sscanview( /* get view parameters from string */ |
| 453 |
> |
VIEW *vp, |
| 454 |
> |
char *s |
| 455 |
> |
) |
| 456 |
> |
{ |
| 457 |
> |
int ac; |
| 458 |
> |
char *av[4]; |
| 459 |
> |
int na; |
| 460 |
> |
int nvopts = 0; |
| 461 |
> |
|
| 462 |
> |
while (isspace(*s)) |
| 463 |
> |
if (!*s++) |
| 464 |
|
return(0); |
| 465 |
< |
case '-': |
| 466 |
< |
switch (*s++) { |
| 467 |
< |
case '\0': |
| 468 |
< |
return(-1); |
| 469 |
< |
case 'x': |
| 470 |
< |
if (sscanf(s, "%d", &vp->hresolu) != 1) |
| 471 |
< |
return(-1); |
| 472 |
< |
s = sskip(s); |
| 473 |
< |
continue; |
| 474 |
< |
case 'y': |
| 475 |
< |
if (sscanf(s, "%d", &vp->vresolu) != 1) |
| 476 |
< |
return(-1); |
| 477 |
< |
s = sskip(s); |
| 478 |
< |
continue; |
| 479 |
< |
case 'v': |
| 480 |
< |
switch (*s++) { |
| 481 |
< |
case '\0': |
| 482 |
< |
return(-1); |
| 171 |
< |
case 't': |
| 172 |
< |
vp->type = *s++; |
| 173 |
< |
continue; |
| 174 |
< |
case 'p': |
| 175 |
< |
if (sscanf(s, "%lf %lf %lf", |
| 176 |
< |
&vp->vp[0], |
| 177 |
< |
&vp->vp[1], |
| 178 |
< |
&vp->vp[2]) != 3) |
| 179 |
< |
return(-1); |
| 180 |
< |
s = sskip(sskip(sskip(s))); |
| 181 |
< |
continue; |
| 182 |
< |
case 'd': |
| 183 |
< |
if (sscanf(s, "%lf %lf %lf", |
| 184 |
< |
&vp->vdir[0], |
| 185 |
< |
&vp->vdir[1], |
| 186 |
< |
&vp->vdir[2]) != 3) |
| 187 |
< |
return(-1); |
| 188 |
< |
s = sskip(sskip(sskip(s))); |
| 189 |
< |
continue; |
| 190 |
< |
case 'u': |
| 191 |
< |
if (sscanf(s, "%lf %lf %lf", |
| 192 |
< |
&vp->vup[0], |
| 193 |
< |
&vp->vup[1], |
| 194 |
< |
&vp->vup[2]) != 3) |
| 195 |
< |
return(-1); |
| 196 |
< |
s = sskip(sskip(sskip(s))); |
| 197 |
< |
continue; |
| 198 |
< |
case 'h': |
| 199 |
< |
if (sscanf(s, "%lf", |
| 200 |
< |
&vp->horiz) != 1) |
| 201 |
< |
return(-1); |
| 202 |
< |
s = sskip(s); |
| 203 |
< |
continue; |
| 204 |
< |
case 'v': |
| 205 |
< |
if (sscanf(s, "%lf", |
| 206 |
< |
&vp->vert) != 1) |
| 207 |
< |
return(-1); |
| 208 |
< |
s = sskip(s); |
| 209 |
< |
continue; |
| 210 |
< |
} |
| 211 |
< |
continue; |
| 212 |
< |
} |
| 213 |
< |
continue; |
| 214 |
< |
} |
| 465 |
> |
while (*s) { |
| 466 |
> |
ac = 0; |
| 467 |
> |
do { |
| 468 |
> |
if (ac || *s == '-') |
| 469 |
> |
av[ac++] = s; |
| 470 |
> |
while (*s && !isspace(*s)) |
| 471 |
> |
s++; |
| 472 |
> |
while (isspace(*s)) |
| 473 |
> |
s++; |
| 474 |
> |
} while (*s && ac < 4); |
| 475 |
> |
if ((na = getviewopt(vp, ac, av)) >= 0) { |
| 476 |
> |
if (na+1 < ac) |
| 477 |
> |
s = av[na+1]; |
| 478 |
> |
nvopts++; |
| 479 |
> |
} else if (ac > 1) |
| 480 |
> |
s = av[1]; |
| 481 |
> |
} |
| 482 |
> |
return(nvopts); |
| 483 |
|
} |
| 484 |
|
|
| 485 |
|
|
| 486 |
< |
fprintview(vp, fp) /* write out view parameters */ |
| 487 |
< |
register VIEW *vp; |
| 488 |
< |
FILE *fp; |
| 486 |
> |
void |
| 487 |
> |
fprintview( /* write out view parameters */ |
| 488 |
> |
VIEW *vp, |
| 489 |
> |
FILE *fp |
| 490 |
> |
) |
| 491 |
|
{ |
| 492 |
|
fprintf(fp, " -vt%c", vp->type); |
| 493 |
|
fprintf(fp, " -vp %.6g %.6g %.6g", vp->vp[0], vp->vp[1], vp->vp[2]); |
| 494 |
< |
fprintf(fp, " -vd %.6g %.6g %.6g", vp->vdir[0], vp->vdir[1], vp->vdir[2]); |
| 494 |
> |
fprintf(fp, " -vd %.6g %.6g %.6g", vp->vdir[0]*vp->vdist, |
| 495 |
> |
vp->vdir[1]*vp->vdist, |
| 496 |
> |
vp->vdir[2]*vp->vdist); |
| 497 |
|
fprintf(fp, " -vu %.6g %.6g %.6g", vp->vup[0], vp->vup[1], vp->vup[2]); |
| 498 |
|
fprintf(fp, " -vh %.6g -vv %.6g", vp->horiz, vp->vert); |
| 499 |
< |
fprintf(fp, " -x %d -y %d", vp->hresolu, vp->vresolu); |
| 499 |
> |
fprintf(fp, " -vo %.6g -va %.6g", vp->vfore, vp->vaft); |
| 500 |
> |
fprintf(fp, " -vs %.6g -vl %.6g", vp->hoff, vp->voff); |
| 501 |
|
} |
| 502 |
|
|
| 503 |
|
|
| 504 |
< |
static VIEW *hview; /* view from header */ |
| 505 |
< |
static int gothview; /* success indicator */ |
| 506 |
< |
static char *altname[] = {NULL,"rpict","rview","pinterp",VIEWSTR,NULL}; |
| 504 |
> |
char * |
| 505 |
> |
viewopt( /* translate to minimal view string */ |
| 506 |
> |
VIEW *vp |
| 507 |
> |
) |
| 508 |
> |
{ |
| 509 |
> |
static char vwstr[128]; |
| 510 |
> |
char *cp = vwstr; |
| 511 |
|
|
| 512 |
+ |
*cp = '\0'; |
| 513 |
+ |
if (vp->type != stdview.type) { |
| 514 |
+ |
sprintf(cp, " -vt%c", vp->type); |
| 515 |
+ |
cp += strlen(cp); |
| 516 |
+ |
} |
| 517 |
+ |
if (!VEQ(vp->vp,stdview.vp)) { |
| 518 |
+ |
sprintf(cp, " -vp %.6g %.6g %.6g", |
| 519 |
+ |
vp->vp[0], vp->vp[1], vp->vp[2]); |
| 520 |
+ |
cp += strlen(cp); |
| 521 |
+ |
} |
| 522 |
+ |
if (!FEQ(vp->vdist,stdview.vdist) || !VEQ(vp->vdir,stdview.vdir)) { |
| 523 |
+ |
sprintf(cp, " -vd %.6g %.6g %.6g", |
| 524 |
+ |
vp->vdir[0]*vp->vdist, |
| 525 |
+ |
vp->vdir[1]*vp->vdist, |
| 526 |
+ |
vp->vdir[2]*vp->vdist); |
| 527 |
+ |
cp += strlen(cp); |
| 528 |
+ |
} |
| 529 |
+ |
if (!VEQ(vp->vup,stdview.vup)) { |
| 530 |
+ |
sprintf(cp, " -vu %.6g %.6g %.6g", |
| 531 |
+ |
vp->vup[0], vp->vup[1], vp->vup[2]); |
| 532 |
+ |
cp += strlen(cp); |
| 533 |
+ |
} |
| 534 |
+ |
if (!FEQ(vp->horiz,stdview.horiz)) { |
| 535 |
+ |
sprintf(cp, " -vh %.6g", vp->horiz); |
| 536 |
+ |
cp += strlen(cp); |
| 537 |
+ |
} |
| 538 |
+ |
if (!FEQ(vp->vert,stdview.vert)) { |
| 539 |
+ |
sprintf(cp, " -vv %.6g", vp->vert); |
| 540 |
+ |
cp += strlen(cp); |
| 541 |
+ |
} |
| 542 |
+ |
if (!FEQ(vp->vfore,stdview.vfore)) { |
| 543 |
+ |
sprintf(cp, " -vo %.6g", vp->vfore); |
| 544 |
+ |
cp += strlen(cp); |
| 545 |
+ |
} |
| 546 |
+ |
if (!FEQ(vp->vaft,stdview.vaft)) { |
| 547 |
+ |
sprintf(cp, " -va %.6g", vp->vaft); |
| 548 |
+ |
cp += strlen(cp); |
| 549 |
+ |
} |
| 550 |
+ |
if (!FEQ(vp->hoff,stdview.hoff)) { |
| 551 |
+ |
sprintf(cp, " -vs %.6g", vp->hoff); |
| 552 |
+ |
cp += strlen(cp); |
| 553 |
+ |
} |
| 554 |
+ |
if (!FEQ(vp->voff,stdview.voff)) { |
| 555 |
+ |
sprintf(cp, " -vl %.6g", vp->voff); |
| 556 |
+ |
cp += strlen(cp); |
| 557 |
+ |
} |
| 558 |
+ |
return(vwstr); |
| 559 |
+ |
} |
| 560 |
|
|
| 236 |
– |
static |
| 237 |
– |
gethview(s) /* get view from header */ |
| 238 |
– |
char *s; |
| 239 |
– |
{ |
| 240 |
– |
register char **an; |
| 561 |
|
|
| 562 |
+ |
int |
| 563 |
+ |
isview( /* is this a view string? */ |
| 564 |
+ |
char *s |
| 565 |
+ |
) |
| 566 |
+ |
{ |
| 567 |
+ |
static char *altname[]={NULL,VIEWSTR,"rpict","rview","rvu","rpiece","pinterp",NULL}; |
| 568 |
+ |
extern char *progname; |
| 569 |
+ |
char *cp; |
| 570 |
+ |
char **an; |
| 571 |
+ |
/* add program name to list */ |
| 572 |
+ |
if (altname[0] == NULL) { |
| 573 |
+ |
for (cp = progname; *cp; cp++) |
| 574 |
+ |
; |
| 575 |
+ |
while (cp > progname && !ISDIRSEP(cp[-1])) |
| 576 |
+ |
cp--; |
| 577 |
+ |
altname[0] = cp; |
| 578 |
+ |
} |
| 579 |
+ |
/* skip leading path */ |
| 580 |
+ |
cp = s; |
| 581 |
+ |
while (*cp && *cp != ' ') |
| 582 |
+ |
cp++; |
| 583 |
+ |
while (cp > s && !ISDIRSEP(cp[-1])) |
| 584 |
+ |
cp--; |
| 585 |
|
for (an = altname; *an != NULL; an++) |
| 586 |
< |
if (!strncmp(*an, s, strlen(*an))) { |
| 587 |
< |
if (sscanview(hview, s+strlen(*an)) == 0) |
| 588 |
< |
gothview++; |
| 246 |
< |
return; |
| 247 |
< |
} |
| 586 |
> |
if (!strncmp(*an, cp, strlen(*an))) |
| 587 |
> |
return(1); |
| 588 |
> |
return(0); |
| 589 |
|
} |
| 590 |
|
|
| 591 |
|
|
| 592 |
+ |
struct myview { |
| 593 |
+ |
VIEW *hv; |
| 594 |
+ |
int ok; |
| 595 |
+ |
}; |
| 596 |
+ |
|
| 597 |
+ |
|
| 598 |
+ |
static int |
| 599 |
+ |
gethview( /* get view from header */ |
| 600 |
+ |
char *s, |
| 601 |
+ |
void *v |
| 602 |
+ |
) |
| 603 |
+ |
{ |
| 604 |
+ |
if (isview(s) && sscanview(((struct myview*)v)->hv, s) > 0) |
| 605 |
+ |
((struct myview*)v)->ok++; |
| 606 |
+ |
return(0); |
| 607 |
+ |
} |
| 608 |
+ |
|
| 609 |
+ |
|
| 610 |
|
int |
| 611 |
< |
viewfile(fname, vp) /* get view from file */ |
| 612 |
< |
char *fname; |
| 613 |
< |
VIEW *vp; |
| 611 |
> |
viewfile( /* get view from file */ |
| 612 |
> |
char *fname, |
| 613 |
> |
VIEW *vp, |
| 614 |
> |
RESOLU *rp |
| 615 |
> |
) |
| 616 |
|
{ |
| 617 |
< |
extern char *progname; |
| 617 |
> |
struct myview mvs; |
| 618 |
|
FILE *fp; |
| 619 |
|
|
| 620 |
< |
if ((fp = fopen(fname, "r")) == NULL) |
| 620 |
> |
if (fname == NULL || !strcmp(fname, "-")) |
| 621 |
> |
fp = stdin; |
| 622 |
> |
else if ((fp = fopen(fname, "r")) == NULL) |
| 623 |
|
return(-1); |
| 624 |
|
|
| 625 |
< |
altname[0] = progname; |
| 626 |
< |
hview = vp; |
| 264 |
< |
gothview = 0; |
| 625 |
> |
mvs.hv = vp; |
| 626 |
> |
mvs.ok = 0; |
| 627 |
|
|
| 628 |
< |
getheader(fp, gethview); |
| 628 |
> |
getheader(fp, gethview, &mvs); |
| 629 |
|
|
| 630 |
+ |
if (rp != NULL && !fgetsresolu(rp, fp)) |
| 631 |
+ |
mvs.ok = 0; |
| 632 |
+ |
|
| 633 |
|
fclose(fp); |
| 634 |
|
|
| 635 |
< |
return(gothview); |
| 635 |
> |
return(mvs.ok); |
| 636 |
|
} |
