Wave-top reflection artifacts

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When the wave-top hits an object it's possible that the reflection is
dissected by the clipping plane (see screenshot, that's my oil-rig in the
ocean) which is really irritating (from a distance it appears that the
object is hovering over the water).

As a quick hack I shifted the clipping plane:

reflClipPlane->setClipPlane(0.0, 0.0, 1.0, -getOceanSurfaceHeight() + 1.5);

... but I suppose it would be a lot nicer if the maximum wave-top would be
used instead of that magic 1.5. I just couldn't figure out where to get it. :)

I realize that this increases the risk of below-surface geometry ending up
in the reflection map so it _might_ be prudent to make this configurable -
OTOH I've seen no such artifacts in my application after the change...

Original issue reported on code.google.com by felix.nawothnig on 12 May 2010 at 9:37

Attachments:

• wave_reflection_artifact.png