bool BoundingBox::CheckOutsideFrustum( const Frustum& f, const Matrix4& mat ) const
{
Halia::Vector3 v[] =
{
mat.TransformCoord( Halia::Vector3( min.x, min.y, min.z ) ),
mat.TransformCoord( Halia::Vector3( max.x, min.y, min.z ) ),
mat.TransformCoord( Halia::Vector3( min.x, max.y, min.z ) ),
mat.TransformCoord( Halia::Vector3( min.x, min.y, max.z ) ),
mat.TransformCoord( Halia::Vector3( max.x, max.y, min.z ) ),
mat.TransformCoord( Halia::Vector3( max.x, min.y, max.z ) ),
mat.TransformCoord( Halia::Vector3( min.x, max.y, max.z ) ),
mat.TransformCoord( Halia::Vector3( max.x, max.y, max.z ) )
};
for( int i = 0; i < 6; ++i )
{
int out = 0;
int in = 0;
for( int j = 0; j < 8; ++j )
{
if( f.p[i].DotProductCoord( v[j] ) < -2.0f )
out++;
else
in++;
}
if( !in )
return true;
else if( out )
return false;
}
return false;
};
void BoundingBox::AddTransformedBB( const BoundingBox& b, const Matrix4& mat )
{
AddPoint( mat.TransformCoord( Vector3( b.min.x, b.min.y, b.min.z ) ) );
AddPoint( mat.TransformCoord( Vector3( b.min.x, b.max.y, b.min.z ) ) );
AddPoint( mat.TransformCoord( Vector3( b.max.x, b.min.y, b.min.z ) ) );
AddPoint( mat.TransformCoord( Vector3( b.min.x, b.min.y, b.max.z ) ) );
AddPoint( mat.TransformCoord( Vector3( b.max.x, b.max.y, b.min.z ) ) );
AddPoint( mat.TransformCoord( Vector3( b.max.x, b.min.y, b.max.z ) ) );
AddPoint( mat.TransformCoord( Vector3( b.min.x, b.max.y, b.max.z ) ) );
AddPoint( mat.TransformCoord( Vector3( b.max.x, b.max.y, b.max.z ) ) );
};
bool BoundingSphere::CheckOutsideFrustum( const Frustum& f, const Matrix4& mat ) const
{
Halia::Vector3 realcenter = mat.TransformCoord( center );
for( int i = 0; i < 6; ++i )
{
if( f.p[i].DotProductCoord( realcenter ) < -radius )
return true;
}
return false;
};