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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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* 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 "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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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 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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extern double tan(), normalize(); |
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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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if (v->vdist <= FTINY) |
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return("illegal view distance"); |
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v->vdist *= normalize(v->vdir); /* normalize direction */ |
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if (v->vdist == 0.0) |
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return("zero view direction"); |
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|
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if (normalize(v->vup) == 0.0) /* normalize view up */ |
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return("zero view up vector"); |
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|
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fcross(v->hvec, v->vdir, v->vup); /* compute horiz dir */ |
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|
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if (normalize(v->hvec) == 0.0) |
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return("illegal view up vector"); |
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return("view up parallel to view direction"); |
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|
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fcross(v->vvec, v->hvec, v->vdir); /* compute vert dir */ |
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|
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if (v->type == VT_PAR) |
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if (v->horiz <= FTINY) |
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return(ill_horiz); |
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if (v->vert <= FTINY) |
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return(ill_vert); |
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|
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switch (v->type) { |
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case VT_PAR: /* parallel view */ |
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v->hn2 = v->horiz; |
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else if (v->type == VT_PER) |
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v->hn2 = 2.0 * tan(v->horiz*(PI/180.0/2.0)); |
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else |
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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/360.)); |
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v->vn2 = 2.0 * tan(v->vert*(PI/360.)); |
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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/360.)); |
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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/360.)); |
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v->vn2 = 2.0 * sin(v->vert*(PI/360.)); |
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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/360.)) / |
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(1.0 + cos(v->horiz*(PI/360.))); |
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v->vn2 = 2.*sin(v->vert*(PI/360.)) / |
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(1.0 + cos(v->vert*(PI/360.))); |
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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 (v->hn2 <= FTINY || v->hn2 >= FHUGE) |
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return("illegal horizontal view size"); |
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return(NULL); |
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} |
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v->hvec[0] *= v->hn2; |
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v->hvec[1] *= v->hn2; |
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v->hvec[2] *= v->hn2; |
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v->hn2 *= v->hn2; |
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|
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if (v->type == VT_PAR) |
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v->vn2 = v->vert; |
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else |
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v->vn2 = 2.0 * tan(v->vert*(PI/180.0/2.0)); |
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char * |
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cropview( /* crop a view to the indicated bounds */ |
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VIEW *v, |
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double x0, |
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double y0, |
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double x1, |
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double y1 |
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) |
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{ |
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static char ill_hemi[] = "illegal crop for hemispherical view"; |
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double d; |
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/* order crop extrema */ |
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if (x0 > x1) { d=x0; x0=x1; x1=d; } |
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if (y0 > y1) { d=y0; y0=y1; y1=d; } |
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|
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if (v->vn2 <= FTINY || v->vn2 >= FHUGE) |
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return("illegal vertical view size"); |
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if ((x1-x0 <= FTINY) | (y1-y0 <= FTINY)) |
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return("zero crop area"); |
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|
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v->vvec[0] *= v->vn2; |
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v->vvec[1] *= v->vn2; |
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v->vvec[2] *= v->vn2; |
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v->vn2 *= v->vn2; |
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d = x1 - x0; /* adjust horizontal size? */ |
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if (!FABSEQ(d, 1.)) |
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switch (v->type) { |
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case VT_PER: |
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v->horiz = 360./PI*atan( d*tan(PI/360.*v->horiz) ); |
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break; |
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case VT_PAR: |
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case VT_ANG: |
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case VT_CYL: |
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v->horiz *= d; |
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break; |
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case VT_HEM: |
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d *= sin(PI/360.*v->horiz); |
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if (d > 1.) |
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return(ill_hemi); |
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v->horiz = 360./PI*asin( d ); |
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break; |
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case VT_PLS: |
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d *= sin(PI/360.*v->horiz) / |
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(1. + cos(PI/360.*v->horiz)); |
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v->horiz = 360./PI*acos( (1. - d*d) / (1. + d*d) ); |
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break; |
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} |
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|
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return(NULL); |
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d = y1 - y0; /* adjust vertical size? */ |
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if (!FABSEQ(d, 1.)) |
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switch (v->type) { |
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case VT_PER: |
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case VT_CYL: |
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v->vert = 360./PI*atan( d*tan(PI/360.*v->vert) ); |
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break; |
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case VT_PAR: |
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case VT_ANG: |
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v->vert *= d; |
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break; |
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case VT_HEM: |
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d *= sin(PI/360.*v->vert); |
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if (d > 1.) |
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return(ill_hemi); |
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v->vert = 360./PI*asin( d ); |
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break; |
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case VT_PLS: |
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d *= sin(PI/360.*v->vert) / |
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(1. + cos(PI/360.*v->vert)); |
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v->vert = 360./PI*acos( (1. - d*d) / (1. + d*d) ); |
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break; |
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} |
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/* adjust offsets */ |
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v->hoff = ((x0 + x1)*.5 - .5 + v->hoff) / (x1 - x0); |
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v->voff = ((y0 + y1)*.5 - .5 + v->voff) / (y1 - y0); |
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|
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return(setview(v)); /* final error checks & set-up */ |
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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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else if (va * *xp > *ap * *yp) |
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*xp = *yp / va * *ap; /* reduce x resolution */ |
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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; /* reduce y resolution */ |
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*yp = *xp * va / *ap + .5; /* reduce y resolution */ |
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} |
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viewray(orig, direc, v, x, y) /* compute ray origin and direction */ |
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FVECT orig, direc; |
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register VIEW *v; |
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double x, y; |
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double |
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viewray( /* compute ray origin and direction */ |
215 |
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FVECT orig, |
216 |
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FVECT direc, |
217 |
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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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|
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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 */ |
228 |
< |
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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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); |
236 |
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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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normalize(direc); |
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VSUM(orig, v->vp, direc, v->vfore); |
242 |
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d = normalize(direc); |
243 |
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return(v->vaft > FTINY ? (v->vaft - v->vfore)*d : 0.0); |
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> |
case VT_HEM: /* hemispherical fisheye */ |
245 |
> |
z = 1.0 - x*x*v->hn2 - y*y*v->vn2; |
246 |
> |
if (z < 0.0) |
247 |
> |
return(-1.0); |
248 |
> |
z = sqrt(z); |
249 |
> |
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
250 |
> |
direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
251 |
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direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
252 |
> |
VSUM(orig, v->vp, direc, v->vfore); |
253 |
> |
return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
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> |
case VT_CYL: /* cylindrical panorama */ |
255 |
> |
d = x * v->horiz * (PI/180.0); |
256 |
> |
z = cos(d); |
257 |
> |
x = sin(d); |
258 |
> |
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
259 |
> |
direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
260 |
> |
direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
261 |
> |
VSUM(orig, v->vp, direc, v->vfore); |
262 |
> |
d = normalize(direc); |
263 |
> |
return(v->vaft > FTINY ? (v->vaft - v->vfore)*d : 0.0); |
264 |
> |
case VT_ANG: /* angular fisheye */ |
265 |
> |
x *= (1.0/180.0)*v->horiz; |
266 |
> |
y *= (1.0/180.0)*v->vert; |
267 |
> |
d = x*x + y*y; |
268 |
> |
if (d > 1.0) |
269 |
> |
return(-1.0); |
270 |
> |
d = sqrt(d); |
271 |
> |
z = cos(PI*d); |
272 |
> |
d = d <= FTINY ? PI : sqrt(1.0 - z*z)/d; |
273 |
> |
x *= d; |
274 |
> |
y *= d; |
275 |
> |
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
276 |
> |
direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
277 |
> |
direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
278 |
> |
VSUM(orig, v->vp, direc, v->vfore); |
279 |
> |
return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
280 |
> |
case VT_PLS: /* planispheric fisheye */ |
281 |
> |
x *= sqrt(v->hn2); |
282 |
> |
y *= sqrt(v->vn2); |
283 |
> |
d = x*x + y*y; |
284 |
> |
z = (1. - d)/(1. + d); |
285 |
> |
x *= (1. + z); |
286 |
> |
y *= (1. + z); |
287 |
> |
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
288 |
> |
direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
289 |
> |
direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
290 |
> |
VSUM(orig, v->vp, direc, v->vfore); |
291 |
> |
return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
292 |
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} |
293 |
+ |
return(-1.0); |
294 |
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} |
295 |
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|
296 |
|
|
297 |
< |
viewpixel(xp, yp, zp, v, p) /* find image location for point */ |
298 |
< |
double *xp, *yp, *zp; |
299 |
< |
register VIEW *v; |
300 |
< |
FVECT p; |
297 |
> |
int |
298 |
> |
viewloc( /* find image location for point */ |
299 |
> |
FVECT ip, |
300 |
> |
VIEW *v, |
301 |
> |
FVECT p |
302 |
> |
) /* Use VL_* flags to interpret return value */ |
303 |
|
{ |
304 |
< |
extern double sqrt(); |
305 |
< |
double d; |
304 |
> |
int rflags = VL_GOOD; |
305 |
> |
double d, d2; |
306 |
|
FVECT disp; |
307 |
|
|
308 |
< |
disp[0] = p[0] - v->vp[0]; |
115 |
< |
disp[1] = p[1] - v->vp[1]; |
116 |
< |
disp[2] = p[2] - v->vp[2]; |
308 |
> |
VSUB(disp, p, v->vp); |
309 |
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|
310 |
< |
if (v->type == VT_PAR) { /* parallel view */ |
311 |
< |
if (zp != NULL) |
312 |
< |
*zp = DOT(disp,v->vdir); |
313 |
< |
} else { /* perspective view */ |
314 |
< |
d = 1.0/DOT(disp,v->vdir); |
315 |
< |
if (zp != NULL) { |
316 |
< |
*zp = sqrt(DOT(disp,disp)); |
317 |
< |
if (d < 0.0) |
318 |
< |
*zp = -*zp; |
319 |
< |
} |
310 |
> |
switch (v->type) { |
311 |
> |
case VT_PAR: /* parallel view */ |
312 |
> |
ip[2] = DOT(disp,v->vdir) - v->vfore; |
313 |
> |
break; |
314 |
> |
case VT_PER: /* perspective view */ |
315 |
> |
d = DOT(disp,v->vdir); |
316 |
> |
rflags |= VL_BEYOND*((v->vaft > FTINY) & |
317 |
> |
(d >= v->vaft)); |
318 |
> |
ip[2] = VLEN(disp); |
319 |
> |
if (d < -FTINY) { /* fold pyramid */ |
320 |
> |
ip[2] = -ip[2]; |
321 |
> |
d = -d; |
322 |
> |
} else if (d <= FTINY) |
323 |
> |
return(VL_BAD); /* at infinite edge */ |
324 |
> |
d = 1.0/d; |
325 |
|
disp[0] *= d; |
326 |
|
disp[1] *= d; |
327 |
|
disp[2] *= d; |
328 |
+ |
if (ip[2] < 0.0) d = -d; |
329 |
+ |
ip[2] *= (1.0 - v->vfore*d); |
330 |
+ |
break; |
331 |
+ |
case VT_HEM: /* hemispherical fisheye */ |
332 |
+ |
d = normalize(disp); |
333 |
+ |
if (DOT(disp,v->vdir) < 0.0) |
334 |
+ |
ip[2] = -d; |
335 |
+ |
else |
336 |
+ |
ip[2] = d; |
337 |
+ |
ip[2] -= v->vfore; |
338 |
+ |
break; |
339 |
+ |
case VT_CYL: /* cylindrical panorama */ |
340 |
+ |
d = DOT(disp,v->hvec); |
341 |
+ |
d2 = DOT(disp,v->vdir); |
342 |
+ |
ip[0] = 180.0/PI * atan2(d,d2) / v->horiz + 0.5 - v->hoff; |
343 |
+ |
d2 = d*d + d2*d2; |
344 |
+ |
if (d2 <= FTINY*FTINY) |
345 |
+ |
return(VL_BAD); /* at pole */ |
346 |
+ |
rflags |= VL_BEYOND*((v->vaft > FTINY) & |
347 |
+ |
(d2 >= v->vaft*v->vaft)); |
348 |
+ |
d = 1.0/sqrt(d2); |
349 |
+ |
ip[1] = DOT(disp,v->vvec)*d/v->vn2 + 0.5 - v->voff; |
350 |
+ |
ip[2] = VLEN(disp); |
351 |
+ |
ip[2] *= (1.0 - v->vfore*d); |
352 |
+ |
goto gotall; |
353 |
+ |
case VT_ANG: /* angular fisheye */ |
354 |
+ |
ip[0] = 0.5 - v->hoff; |
355 |
+ |
ip[1] = 0.5 - v->voff; |
356 |
+ |
ip[2] = normalize(disp) - v->vfore; |
357 |
+ |
d = DOT(disp,v->vdir); |
358 |
+ |
if (d >= 1.0-FTINY) |
359 |
+ |
goto gotall; |
360 |
+ |
if (d <= -(1.0-FTINY)) { |
361 |
+ |
ip[0] += 180.0/v->horiz; |
362 |
+ |
goto gotall; |
363 |
+ |
} |
364 |
+ |
d = (180.0/PI)*acos(d) / sqrt(1.0 - d*d); |
365 |
+ |
ip[0] += DOT(disp,v->hvec)*d/v->horiz; |
366 |
+ |
ip[1] += DOT(disp,v->vvec)*d/v->vert; |
367 |
+ |
goto gotall; |
368 |
+ |
case VT_PLS: /* planispheric fisheye */ |
369 |
+ |
ip[0] = 0.5 - v->hoff; |
370 |
+ |
ip[1] = 0.5 - v->voff; |
371 |
+ |
ip[2] = normalize(disp) - v->vfore; |
372 |
+ |
d = DOT(disp,v->vdir); |
373 |
+ |
if (d >= 1.0-FTINY) |
374 |
+ |
goto gotall; |
375 |
+ |
if (d <= -(1.0-FTINY)) |
376 |
+ |
return(VL_BAD); |
377 |
+ |
ip[0] += DOT(disp,v->hvec)/((1. + d)*sqrt(v->hn2)); |
378 |
+ |
ip[1] += DOT(disp,v->vvec)/((1. + d)*sqrt(v->vn2)); |
379 |
+ |
goto gotall; |
380 |
+ |
default: |
381 |
+ |
return(VL_BAD); |
382 |
|
} |
383 |
< |
*xp = DOT(disp,v->hvec)/v->hn2 + 0.5 - v->hoff; |
384 |
< |
*yp = DOT(disp,v->vvec)/v->vn2 + 0.5 - v->voff; |
383 |
> |
ip[0] = DOT(disp,v->hvec)/v->hn2 + 0.5 - v->hoff; |
384 |
> |
ip[1] = DOT(disp,v->vvec)/v->vn2 + 0.5 - v->voff; |
385 |
> |
gotall: /* add appropriate return flags */ |
386 |
> |
if (ip[2] <= 0.0) |
387 |
> |
rflags |= VL_BEHIND; |
388 |
> |
else if ((v->type != VT_PER) & (v->type != VT_CYL)) |
389 |
> |
rflags |= VL_BEYOND*((v->vaft > FTINY) & |
390 |
> |
(ip[2] >= v->vaft - v->vfore)); |
391 |
> |
rflags |= VL_OUTSIDE*((0.0 >= ip[0]) | (ip[0] >= 1.0) | |
392 |
> |
(0.0 >= ip[1]) | (ip[1] >= 1.0)); |
393 |
> |
return(rflags); |
394 |
|
} |
395 |
|
|
396 |
|
|
397 |
+ |
void |
398 |
+ |
pix2loc( /* compute image location from pixel pos. */ |
399 |
+ |
RREAL loc[2], |
400 |
+ |
RESOLU *rp, |
401 |
+ |
int px, |
402 |
+ |
int py |
403 |
+ |
) |
404 |
+ |
{ |
405 |
+ |
int x, y; |
406 |
+ |
|
407 |
+ |
if (rp->rt & YMAJOR) { |
408 |
+ |
x = px; |
409 |
+ |
y = py; |
410 |
+ |
} else { |
411 |
+ |
x = py; |
412 |
+ |
y = px; |
413 |
+ |
} |
414 |
+ |
if (rp->rt & XDECR) |
415 |
+ |
x = rp->xr-1 - x; |
416 |
+ |
if (rp->rt & YDECR) |
417 |
+ |
y = rp->yr-1 - y; |
418 |
+ |
loc[0] = (x+.5)/rp->xr; |
419 |
+ |
loc[1] = (y+.5)/rp->yr; |
420 |
+ |
} |
421 |
+ |
|
422 |
+ |
|
423 |
+ |
void |
424 |
+ |
loc2pix( /* compute pixel pos. from image location */ |
425 |
+ |
int pp[2], |
426 |
+ |
RESOLU *rp, |
427 |
+ |
double lx, |
428 |
+ |
double ly |
429 |
+ |
) |
430 |
+ |
{ |
431 |
+ |
int x, y; |
432 |
+ |
|
433 |
+ |
x = (int)(lx*rp->xr + .5 - (lx < 0.0)); |
434 |
+ |
y = (int)(ly*rp->yr + .5 - (ly < 0.0)); |
435 |
+ |
|
436 |
+ |
if (rp->rt & XDECR) |
437 |
+ |
x = rp->xr-1 - x; |
438 |
+ |
if (rp->rt & YDECR) |
439 |
+ |
y = rp->yr-1 - y; |
440 |
+ |
if (rp->rt & YMAJOR) { |
441 |
+ |
pp[0] = x; |
442 |
+ |
pp[1] = y; |
443 |
+ |
} else { |
444 |
+ |
pp[0] = y; |
445 |
+ |
pp[1] = x; |
446 |
+ |
} |
447 |
+ |
} |
448 |
+ |
|
449 |
+ |
|
450 |
|
int |
451 |
< |
getviewopt(v, ac, av) /* process view argument */ |
452 |
< |
register VIEW *v; |
453 |
< |
int ac; |
454 |
< |
register char *av[]; |
451 |
> |
getviewopt( /* process view argument */ |
452 |
> |
VIEW *v, |
453 |
> |
int ac, |
454 |
> |
char *av[] |
455 |
> |
) |
456 |
|
{ |
457 |
< |
#define check(c,n) if ((av[0][c]&&av[0][c]!=' ') || n>=ac) return(-1) |
458 |
< |
extern double atof(); |
457 |
> |
#define check(c,l) if ((av[0][c]&&!isspace(av[0][c])) || \ |
458 |
> |
badarg(ac-1,av+1,l)) return(-1) |
459 |
|
|
460 |
|
if (ac <= 0 || av[0][0] != '-' || av[0][1] != 'v') |
461 |
|
return(-1); |
462 |
|
switch (av[0][2]) { |
463 |
|
case 't': /* type */ |
464 |
< |
if (!av[0][3] || av[0][3]==' ') |
464 |
> |
if (!av[0][3] || isspace(av[0][3])) |
465 |
|
return(-1); |
466 |
< |
check(4,0); |
466 |
> |
check(4,""); |
467 |
|
v->type = av[0][3]; |
468 |
|
return(0); |
469 |
|
case 'p': /* point */ |
470 |
< |
check(3,3); |
470 |
> |
check(3,"fff"); |
471 |
|
v->vp[0] = atof(av[1]); |
472 |
|
v->vp[1] = atof(av[2]); |
473 |
|
v->vp[2] = atof(av[3]); |
474 |
|
return(3); |
475 |
|
case 'd': /* direction */ |
476 |
< |
check(3,3); |
476 |
> |
check(3,"fff"); |
477 |
|
v->vdir[0] = atof(av[1]); |
478 |
|
v->vdir[1] = atof(av[2]); |
479 |
|
v->vdir[2] = atof(av[3]); |
480 |
+ |
v->vdist = 1.; |
481 |
|
return(3); |
482 |
|
case 'u': /* up */ |
483 |
< |
check(3,3); |
483 |
> |
check(3,"fff"); |
484 |
|
v->vup[0] = atof(av[1]); |
485 |
|
v->vup[1] = atof(av[2]); |
486 |
|
v->vup[2] = atof(av[3]); |
487 |
|
return(3); |
488 |
|
case 'h': /* horizontal size */ |
489 |
< |
check(3,1); |
489 |
> |
check(3,"f"); |
490 |
|
v->horiz = atof(av[1]); |
491 |
|
return(1); |
492 |
|
case 'v': /* vertical size */ |
493 |
< |
check(3,1); |
493 |
> |
check(3,"f"); |
494 |
|
v->vert = atof(av[1]); |
495 |
|
return(1); |
496 |
+ |
case 'o': /* fore clipping plane */ |
497 |
+ |
check(3,"f"); |
498 |
+ |
v->vfore = atof(av[1]); |
499 |
+ |
return(1); |
500 |
+ |
case 'a': /* aft clipping plane */ |
501 |
+ |
check(3,"f"); |
502 |
+ |
v->vaft = atof(av[1]); |
503 |
+ |
return(1); |
504 |
|
case 's': /* shift */ |
505 |
< |
check(3,1); |
505 |
> |
check(3,"f"); |
506 |
|
v->hoff = atof(av[1]); |
507 |
|
return(1); |
508 |
|
case 'l': /* lift */ |
509 |
< |
check(3,1); |
509 |
> |
check(3,"f"); |
510 |
|
v->voff = atof(av[1]); |
511 |
|
return(1); |
512 |
|
default: |
517 |
|
|
518 |
|
|
519 |
|
int |
520 |
< |
sscanview(vp, s) /* get view parameters from string */ |
521 |
< |
VIEW *vp; |
522 |
< |
register char *s; |
520 |
> |
sscanview( /* get view parameters from string */ |
521 |
> |
VIEW *vp, |
522 |
> |
char *s |
523 |
> |
) |
524 |
|
{ |
525 |
|
int ac; |
526 |
|
char *av[4]; |
527 |
|
int na; |
528 |
|
int nvopts = 0; |
529 |
|
|
530 |
< |
while (*s == ' ') |
531 |
< |
s++; |
530 |
> |
while (isspace(*s)) |
531 |
> |
if (!*s++) |
532 |
> |
return(0); |
533 |
|
while (*s) { |
534 |
|
ac = 0; |
535 |
|
do { |
536 |
< |
av[ac++] = s; |
537 |
< |
while (*s && *s != ' ') |
536 |
> |
if (ac || *s == '-') |
537 |
> |
av[ac++] = s; |
538 |
> |
while (*s && !isspace(*s)) |
539 |
|
s++; |
540 |
< |
while (*s == ' ') |
540 |
> |
while (isspace(*s)) |
541 |
|
s++; |
542 |
|
} while (*s && ac < 4); |
543 |
|
if ((na = getviewopt(vp, ac, av)) >= 0) { |
551 |
|
} |
552 |
|
|
553 |
|
|
554 |
< |
fprintview(vp, fp) /* write out view parameters */ |
555 |
< |
register VIEW *vp; |
556 |
< |
FILE *fp; |
554 |
> |
void |
555 |
> |
fprintview( /* write out view parameters */ |
556 |
> |
VIEW *vp, |
557 |
> |
FILE *fp |
558 |
> |
) |
559 |
|
{ |
560 |
|
fprintf(fp, " -vt%c", vp->type); |
561 |
|
fprintf(fp, " -vp %.6g %.6g %.6g", vp->vp[0], vp->vp[1], vp->vp[2]); |
562 |
< |
fprintf(fp, " -vd %.6g %.6g %.6g", vp->vdir[0], vp->vdir[1], vp->vdir[2]); |
562 |
> |
fprintf(fp, " -vd %.6g %.6g %.6g", vp->vdir[0]*vp->vdist, |
563 |
> |
vp->vdir[1]*vp->vdist, |
564 |
> |
vp->vdir[2]*vp->vdist); |
565 |
|
fprintf(fp, " -vu %.6g %.6g %.6g", vp->vup[0], vp->vup[1], vp->vup[2]); |
566 |
|
fprintf(fp, " -vh %.6g -vv %.6g", vp->horiz, vp->vert); |
567 |
+ |
fprintf(fp, " -vo %.6g -va %.6g", vp->vfore, vp->vaft); |
568 |
|
fprintf(fp, " -vs %.6g -vl %.6g", vp->hoff, vp->voff); |
569 |
|
} |
570 |
|
|
571 |
|
|
572 |
< |
static VIEW *hview; /* view from header */ |
573 |
< |
static int gothview; /* success indicator */ |
574 |
< |
static char *altname[] = {NULL,"rpict","rview","pinterp",VIEWSTR,NULL}; |
572 |
> |
char * |
573 |
> |
viewopt( /* translate to minimal view string */ |
574 |
> |
VIEW *vp |
575 |
> |
) |
576 |
> |
{ |
577 |
> |
static char vwstr[128]; |
578 |
> |
char *cp = vwstr; |
579 |
|
|
580 |
+ |
*cp = '\0'; |
581 |
+ |
if (vp->type != stdview.type) { |
582 |
+ |
sprintf(cp, " -vt%c", vp->type); |
583 |
+ |
cp += strlen(cp); |
584 |
+ |
} |
585 |
+ |
if (!VABSEQ(vp->vp,stdview.vp)) { |
586 |
+ |
sprintf(cp, " -vp %.6g %.6g %.6g", |
587 |
+ |
vp->vp[0], vp->vp[1], vp->vp[2]); |
588 |
+ |
cp += strlen(cp); |
589 |
+ |
} |
590 |
+ |
if (!FABSEQ(vp->vdist,stdview.vdist) || !VABSEQ(vp->vdir,stdview.vdir)) { |
591 |
+ |
sprintf(cp, " -vd %.6g %.6g %.6g", |
592 |
+ |
vp->vdir[0]*vp->vdist, |
593 |
+ |
vp->vdir[1]*vp->vdist, |
594 |
+ |
vp->vdir[2]*vp->vdist); |
595 |
+ |
cp += strlen(cp); |
596 |
+ |
} |
597 |
+ |
if (!VABSEQ(vp->vup,stdview.vup)) { |
598 |
+ |
sprintf(cp, " -vu %.6g %.6g %.6g", |
599 |
+ |
vp->vup[0], vp->vup[1], vp->vup[2]); |
600 |
+ |
cp += strlen(cp); |
601 |
+ |
} |
602 |
+ |
if (!FABSEQ(vp->horiz,stdview.horiz)) { |
603 |
+ |
sprintf(cp, " -vh %.6g", vp->horiz); |
604 |
+ |
cp += strlen(cp); |
605 |
+ |
} |
606 |
+ |
if (!FABSEQ(vp->vert,stdview.vert)) { |
607 |
+ |
sprintf(cp, " -vv %.6g", vp->vert); |
608 |
+ |
cp += strlen(cp); |
609 |
+ |
} |
610 |
+ |
if (!FABSEQ(vp->vfore,stdview.vfore)) { |
611 |
+ |
sprintf(cp, " -vo %.6g", vp->vfore); |
612 |
+ |
cp += strlen(cp); |
613 |
+ |
} |
614 |
+ |
if (!FABSEQ(vp->vaft,stdview.vaft)) { |
615 |
+ |
sprintf(cp, " -va %.6g", vp->vaft); |
616 |
+ |
cp += strlen(cp); |
617 |
+ |
} |
618 |
+ |
if (!FABSEQ(vp->hoff,stdview.hoff)) { |
619 |
+ |
sprintf(cp, " -vs %.6g", vp->hoff); |
620 |
+ |
cp += strlen(cp); |
621 |
+ |
} |
622 |
+ |
if (!FABSEQ(vp->voff,stdview.voff)) { |
623 |
+ |
sprintf(cp, " -vl %.6g", vp->voff); |
624 |
+ |
cp += strlen(cp); |
625 |
+ |
} |
626 |
+ |
return(vwstr); |
627 |
+ |
} |
628 |
|
|
246 |
– |
static |
247 |
– |
gethview(s) /* get view from header */ |
248 |
– |
char *s; |
249 |
– |
{ |
250 |
– |
register char **an; |
629 |
|
|
630 |
+ |
int |
631 |
+ |
isview( /* is this a view string? */ |
632 |
+ |
char *s |
633 |
+ |
) |
634 |
+ |
{ |
635 |
+ |
static char *altname[]={NULL,VIEWSTR,"rpict","rview","rvu","rpiece","pinterp",NULL}; |
636 |
+ |
extern char *progname; |
637 |
+ |
char *cp; |
638 |
+ |
char **an; |
639 |
+ |
/* add program name to list */ |
640 |
+ |
if (altname[0] == NULL) { |
641 |
+ |
for (cp = progname; *cp; cp++) |
642 |
+ |
; |
643 |
+ |
while (cp > progname && !ISDIRSEP(cp[-1])) |
644 |
+ |
cp--; |
645 |
+ |
altname[0] = cp; |
646 |
+ |
} |
647 |
+ |
/* skip leading path */ |
648 |
+ |
cp = s; |
649 |
+ |
while (*cp && !isspace(*cp)) |
650 |
+ |
cp++; |
651 |
+ |
while (cp > s && !ISDIRSEP(cp[-1])) |
652 |
+ |
cp--; |
653 |
|
for (an = altname; *an != NULL; an++) |
654 |
< |
if (!strncmp(*an, s, strlen(*an))) { |
655 |
< |
if (sscanview(hview, s+strlen(*an)) > 0) |
656 |
< |
gothview++; |
256 |
< |
return; |
257 |
< |
} |
654 |
> |
if (!strncmp(*an, cp, strlen(*an))) |
655 |
> |
return(1); |
656 |
> |
return(0); |
657 |
|
} |
658 |
|
|
659 |
|
|
660 |
+ |
struct myview { |
661 |
+ |
VIEW *hv; |
662 |
+ |
int ok; |
663 |
+ |
}; |
664 |
+ |
|
665 |
+ |
|
666 |
+ |
static int |
667 |
+ |
gethview( /* get view from header */ |
668 |
+ |
char *s, |
669 |
+ |
void *v |
670 |
+ |
) |
671 |
+ |
{ |
672 |
+ |
if (isview(s) && sscanview(((struct myview*)v)->hv, s) > 0) |
673 |
+ |
((struct myview*)v)->ok++; |
674 |
+ |
return(0); |
675 |
+ |
} |
676 |
+ |
|
677 |
+ |
|
678 |
|
int |
679 |
< |
viewfile(fname, vp, xp, yp) /* get view from file */ |
680 |
< |
char *fname; |
681 |
< |
VIEW *vp; |
682 |
< |
int *xp, *yp; |
679 |
> |
viewfile( /* get view from file */ |
680 |
> |
char *fname, |
681 |
> |
VIEW *vp, |
682 |
> |
RESOLU *rp |
683 |
> |
) |
684 |
|
{ |
685 |
< |
extern char *progname; |
685 |
> |
struct myview mvs; |
686 |
|
FILE *fp; |
687 |
|
|
688 |
< |
if ((fp = fopen(fname, "r")) == NULL) |
688 |
> |
if (fname == NULL || !strcmp(fname, "-")) |
689 |
> |
fp = stdin; |
690 |
> |
else if ((fp = fopen(fname, "r")) == NULL) |
691 |
|
return(-1); |
692 |
|
|
693 |
< |
altname[0] = progname; |
694 |
< |
hview = vp; |
275 |
< |
gothview = 0; |
693 |
> |
mvs.hv = vp; |
694 |
> |
mvs.ok = 0; |
695 |
|
|
696 |
< |
getheader(fp, gethview); |
696 |
> |
getheader(fp, gethview, &mvs); |
697 |
|
|
698 |
< |
if (xp != NULL && yp != NULL |
699 |
< |
&& fgetresolu(xp, yp, fp) == -1) |
281 |
< |
gothview = 0; |
698 |
> |
if (rp != NULL && !fgetsresolu(rp, fp)) |
699 |
> |
mvs.ok = 0; |
700 |
|
|
701 |
< |
fclose(fp); |
701 |
> |
if (fp != stdin) |
702 |
> |
fclose(fp); |
703 |
|
|
704 |
< |
return(gothview); |
704 |
> |
return(mvs.ok); |
705 |
|
} |