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root/Development/ray/src/rt/m_mist.c

Comparing ray/src/rt/m_mist.c (file contents):
Revision 2.2 by greg, Sat Dec 9 09:40:42 1995 UTC vs.
Revision 2.5 by greg, Thu Mar 21 10:24:59 1996 UTC

#	Line 36 | Line 36 | static char SCCSid[] = "$SunId$ LBL";
36		*      [ext_r  ext_g  ext_b  [albedo [gecc]]]
37		*
38		*  The primaries indicate medium extinction per unit length (absorption
39	<	*  plus scattering).  The albedo is the ratio of scattering to extinction,
39	>	*  plus scattering), which is added to the global extinction coefficient, set
40	>	*  by the -me option.  The albedo is the ratio of scattering to extinction,
41		*  and is set globally by the -ma option (salbedo) and overridden here.
42		*  The Heyney-Greenstein eccentricity parameter (-mg seccg) indicates how much
43		*  scattering favors the forward direction.  A value of 0 means isotropic
#	Line 188 | Line 189 | register RAY  *r;
189		}
190		p.slights[0] = i;
191		}
192	<	re = colval(r->cext,RED) - colval(mext,RED);
193	<	ge = colval(r->cext,GRN) - colval(mext,GRN);
194	<	be = colval(r->cext,BLU) - colval(mext,BLU);
195	<	setcolor(p.cext, re<0. ? 0. : re,
196	<	ge<0. ? 0. : ge,
197	<	be<0. ? 0. : be);
192	>	if ((re = colval(r->cext,RED) - colval(mext,RED)) <
193	>	colval(cextinction,RED))
194	>	re = colval(cextinction,RED);
195	>	if ((ge = colval(r->cext,GRN) - colval(mext,GRN)) <
196	>	colval(cextinction,GRN))
197	>	ge = colval(cextinction,GRN);
198	>	if ((be = colval(r->cext,BLU) - colval(mext,BLU)) <
199	>	colval(cextinction,BLU))
200	>	be = colval(cextinction,BLU);
201	>	setcolor(p.cext, re, ge, be);
202		if (m->oargs.nfargs > 3)
203		p.albedo = salbedo;
204		if (m->oargs.nfargs > 4)

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