Marcus Lindblom a écrit :
Xavier Larrode wrote:
Andreas Zieringer a écrit :
Hi,
it is coded for all three light types, but you need a light position
and a direction to do the shadow mapping, so it works best for
spotlights. For a pointlight it looks always to the center of the
scene. Well the directionallight implementation looks buggy.
Andreas
Well it seems not working with directionnal light. but i only have
the OpenSG1.6.0 and not the last CVS version...
Anyway, is there anything else on OpenSG to get shadow?
Isn't it a bit difficult to do shadowmapping with directional lights
in general? You'd need a orthographic shadow projection matrix and
thus define where to apply the shadow. With spotlights, it's more
intuitively defined from the properties of the light itself.
Can you get away by putting a spot light "sufficitenty far away" from
the objects being lit/shadowed and define proper near/far planes. That
should case a shadow which is close to the directional light (which is
a pointlight at infinity anyway). Just an idea that might work. I've
only used "regular" shadowmaps so far...
Regards
/Marcus
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ok thank you marcus.
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