// This gets an AABB for the renderable, but it doesn't cause a parent's bones to be setup.
// This is used for placement in the leaves, but the more expensive version is used for culling.
void CalcRenderableWorldSpaceAABB_Fast( IClientRenderable *pRenderable, Vector &absMin, Vector &absMax )
{
C_BaseEntity *pEnt = pRenderable->GetIClientUnknown()->GetBaseEntity();
if ( pEnt && pEnt->IsFollowingEntity() )
{
C_BaseEntity *pParent = pEnt->GetMoveParent();
Assert( pParent );
// Get the parent's abs space world bounds.
CalcRenderableWorldSpaceAABB_Fast( pParent, absMin, absMax );
// Add the maximum of our local render bounds. This is making the assumption that we can be at any
// point and at any angle within the parent's world space bounds.
Vector vAddMins, vAddMaxs;
pEnt->GetRenderBounds( vAddMins, vAddMaxs );
// if our origin is actually farther away than that, expand again
float radius = pEnt->GetLocalOrigin().Length();
float flBloatSize = max( vAddMins.Length(), vAddMaxs.Length() );
flBloatSize = max(flBloatSize, radius);
absMin -= Vector( flBloatSize, flBloatSize, flBloatSize );
absMax += Vector( flBloatSize, flBloatSize, flBloatSize );
}
else
{
// Start out with our own render bounds. Since we don't have a parent, this won't incur any nasty
CalcRenderableWorldSpaceAABB( pRenderable, absMin, absMax );
}
}
//-----------------------------------------------------------------------------
// Helper functions.
//-----------------------------------------------------------------------------
void DefaultRenderBoundsWorldspace( IClientRenderable *pRenderable, Vector &absMins, Vector &absMaxs )
{
// Tracker 37433: This fixes a bug where if the stunstick is being wielded by a combine soldier, the fact that the stick was
// attached to the soldier's hand would move it such that it would get frustum culled near the edge of the screen.
C_BaseEntity *pEnt = pRenderable->GetIClientUnknown()->GetBaseEntity();
if ( pEnt && pEnt->IsFollowingEntity() )
{
C_BaseEntity *pParent = pEnt->GetFollowedEntity();
if ( pParent )
{
// Get the parent's abs space world bounds.
CalcRenderableWorldSpaceAABB_Fast( pParent, absMins, absMaxs );
// Add the maximum of our local render bounds. This is making the assumption that we can be at any
// point and at any angle within the parent's world space bounds.
Vector vAddMins, vAddMaxs;
pEnt->GetRenderBounds( vAddMins, vAddMaxs );
// if our origin is actually farther away than that, expand again
float radius = pEnt->GetLocalOrigin().Length();
float flBloatSize = max( vAddMins.Length(), vAddMaxs.Length() );
flBloatSize = max(flBloatSize, radius);
absMins -= Vector( flBloatSize, flBloatSize, flBloatSize );
absMaxs += Vector( flBloatSize, flBloatSize, flBloatSize );
return;
}
}
Vector mins, maxs;
pRenderable->GetRenderBounds( mins, maxs );
// FIXME: Should I just use a sphere here?
// Another option is to pass the OBB down the tree; makes for a better fit
// Generate a world-aligned AABB
const QAngle& angles = pRenderable->GetRenderAngles();
const Vector& origin = pRenderable->GetRenderOrigin();
if (angles == vec3_angle)
{
VectorAdd( mins, origin, absMins );
VectorAdd( maxs, origin, absMaxs );
}
else
{
matrix3x4_t boxToWorld;
AngleMatrix( angles, origin, boxToWorld );
TransformAABB( boxToWorld, mins, maxs, absMins, absMaxs );
}
Assert( absMins.IsValid() && absMaxs.IsValid() );
}