/// \brief
/// Helper function for visibility loop implementations
///
/// \param vCameraPos
/// Camera position to test LOD clipping
/// \param fLODScaleSqr
/// Square of the LOD scaling factor
///
/// \returns
/// true if the object is clipped either by near of far clip distance (if specified)
inline bool IsNearOrFarClipped(const hkvVec3& vCameraPos, float fLODScaleSqr=1.f) const
{
// changes in this function have to be reflected in SPU version IsNearOrFarClipped
int iLODMode = m_iPerformTestFlags&VIS_PERFORM_LODTEST;
float fDistSqr;
switch (iLODMode)
{
case VIS_LOD_TEST_NONE:
return false;
case VIS_LOD_TEST_CLIPPOSITION:
fDistSqr = vCameraPos.getDistanceToSquared(m_vClipReference)*fLODScaleSqr;
break;
case VIS_LOD_TEST_BOUNDINGBOX:
fDistSqr = m_BoundingBox.getDistanceToSquared(vCameraPos)*fLODScaleSqr;
break;
default:
VASSERT_MSG(false,"Invalid combination of LOD flags");
return false;
}
return IsNearOrFarClipped(fDistSqr);
}
/// \brief
/// Helper function to determine whether the object is clipped given the passed camera position and a factor to scale the squared distance of the object to the camera.
bool IsNearOrFarClipped(const hkvVec3& vCameraPos, float fLODScaleSqr=1.f) const
{
return IsNearOrFarClipped(GetClipDistanceSqr(vCameraPos) * fLODScaleSqr);
}
/// \brief
/// Helper function for visibility loop implementations
///
/// \param iFilterMask
/// Context's filter mask to test against the m_iVisibleMask member
/// \param vCameraPos
/// Camera position to test LOD clipping
/// \param fLODScaleSqr
/// Square of the LOD scaling factor. Pass a value < 0.0 to ignore near or far clipping
///
/// \returns
/// true if the object is clipped either by near of far clip distance (if specified)
inline bool IsClipped(unsigned int iFilterMask, const hkvVec3& vCameraPos, float fLODScaleSqr) const
{
if ((m_iVisibleMask&iFilterMask)==0 || ((m_iPerformTestFlags&(VIS_EXCLUDED_FROM_VISTEST|VIS_IS_INACTIVE)))!=0)
return true;
return (fLODScaleSqr<0.f) ? false : IsNearOrFarClipped(vCameraPos,fLODScaleSqr);
}
