 | | | secondary ray | secondary ray 2005-03-29 - By Jim Rothrock
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Haarm-Pieter Duiker wrote:
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<div><span class="170290917-29032005"><font face="Courier New"
size="2">Transparency Rays aren't considered to be Secondary Rays. If
you look in the old "Progamming mental ray" book, Section 3.4
discusses the state and the ray type variable state->type. Eye rays
and Transparency rays are considered to be primary. It appears,
somewhat confusingly, that secondary rays are defined to be rays
generated at an intersection point. Guess the definition of primary is
overriding the definition of secondary in your case.</font></span></div>
<div><span class="170290917-29032005"></span></div>
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When not using scanline rapid, mi_trace_transparent() generates a
primary ray. When using scanline rapid, mi_trace_transparent() does
not generate a ray at all. If you want a secondary ray, call
mi_trace_refraction().<br>
<pre class="moz-signature" cols="72">--
Jim Rothrock | Stan Winston Digital | <a class="moz-txt-link-abbreviated" href=
"mailto:jimr@(protected)">jimr@(protected)</a>
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