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/* Copyright (c) 1987 Regents of the University of California */ |
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/* Copyright (c) 1994 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#include "random.h" |
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#ifndef WFLUSH |
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#define WFLUSH 30 /* flush after this many rays */ |
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#ifdef SPEED |
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#define WFLUSH (5*SPEED) |
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#else |
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#define WFLUSH 100 /* flush after this many rays */ |
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#endif |
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#endif |
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#ifdef SMLFLT |
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#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3) |
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(*dev->comout)("Pick view center\n"); |
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if ((*dev->getcur)(&x, &y) == ABORT) |
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return(-1); |
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if (viewray(thisray.rorg, thisray.rdir, &ourview, |
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(x+.5)/hresolu, (y+.5)/vresolu) < 0) { |
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if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
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&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) { |
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error(COMMAND, "not on image"); |
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return(-1); |
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} |
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register PNODE *p; |
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int xmin, ymin, xmax, ymax; |
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{ |
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extern long nrays; |
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static long lastflush = 0; |
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extern unsigned long nrays; |
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static unsigned long lastflush = 0; |
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static RAY thisray; |
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double h, v; |
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h = xmin + (xmax-xmin)*frandom(); |
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v = ymin + (ymax-ymin)*frandom(); |
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if (viewray(thisray.rorg, thisray.rdir, &ourview, |
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h/hresolu, v/vresolu) < 0) { |
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if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, &ourview, |
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h/hresolu, v/vresolu)) < -FTINY) { |
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setcolor(thisray.rcol, 0.0, 0.0, 0.0); |
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} else { |
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rayorigin(&thisray, NULL, PRIMARY, 1.0); |