From: Arend Abbing (a.abbing++at++marin.nl)
Date: 04/06/2005 08:09:10
Hi,
I'm trying to implement a pfPolytope based visibility check of geometry
fitting exactly in a pre-calculated pfPolytope (m_polytope) but its
doesn't work (it culls the sector always). Has anyone a clue of what's
going wrong here?
int Sector::app(pfTraverser *trav)
{
if (ptope) {
pfVec3 eye;
pfMatrix mat, trans;
static pfPolytope *poly = 0L;
static pfPolytope *view = 0L;
if (!poly) {
poly = new (pfGetSharedArena()) pfPolytope(6);
view = new (pfGetSharedArena()) pfPolytope;
}
// Transform the polytope from object space to viewing
// space.
trav->getMat(mat);
pfChannel *channel = trav->getChan();
poly->orthoXform(this->m_polytope, mat);
// Get the current viewing frustum polytope and check
// the intersection
channel->getPtope(view);
m_visible = view->contains(poly);
}
return pfGroup::app(trav);
}
Regards,
Arend.
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