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/* Copyright (c) 1991 Regents of the University of California */
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/* SCCSid "$SunId$ LBL" */
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/*
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* Common data structures for glare source finding routines
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*/
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#include "standard.h"
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#include "view.h"
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#include "color.h"
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#include "setscan.h"
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#define GLAREBR 10.0 /* glare source is this * avg. lum. */
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#define SAMPDENS 50 /* default samples per unit in image */
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#define TSAMPSTEP 10 /* sample step to compute threshold */
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#define SEPS 2 /* sources this close ==> contig. */
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extern VIEW ourview; /* our view */
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extern VIEW pictview; /* picture view */
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extern VIEW leftview, rightview; /* leftmost and rightmost views */
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extern int verbose; /* verbose reporting */
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extern char *progname; /* global argv[0] */
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extern int sampdens; /* sample density */
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extern ANGLE glarang[]; /* glare calculation angles */
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extern int nglarangs;
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extern double maxtheta; /* maximum glare angle (in radians) */
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extern int hsize; /* horizontal size */
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extern int hlim; /* horizontal limit of central view */
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#define nglardirs (2*nglarangs+1)
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#define vsize (sampdens-1)
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#define h_theta(h) (-(double)(h)/(double)sampdens)
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extern struct illum {
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float theta; /* glare direction */
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float lcos, lsin; /* cosine and sine to left view */
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float rcos, rsin; /* cosine and sine to right view */
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double sum; /* sum of indirect luminances */
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int n; /* number of values in sum */
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} *indirect; /* array of indirect illuminances */
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struct srcspan {
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short v; /* vertical position */
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short l, r; /* left and right horizontal limits */
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float brsum; /* sum of brightnesses for this span */
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struct srcspan *next; /* next source span in list */
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};
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extern struct source {
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FVECT dir; /* source direction */
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double dom; /* solid angle of source */
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double brt; /* average source brightness */
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struct srcspan *first; /* first span for this source */
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struct source *next; /* next source in list */
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} *donelist; /* finished sources */
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extern double getviewpix();
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