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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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(*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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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); |