/// <summary>
/// Builds the convex regions for a root node and all its children
/// </summary>
private void BuildConvexRegions( BspNode node )
{
// Find the bounding box for the tree
float[] bounds = new float[ 4 ] { float.MaxValue, float.MaxValue, float.MinValue, float.MinValue };
GetNodeBoundingRectangle( node, bounds );
// Expand bounds a bit
float boundary = 1.0f;
bounds[ 0 ] -= boundary;
bounds[ 1 ] -= boundary;
bounds[ 2 ] += boundary;
bounds[ 3 ] += boundary;
float width = bounds[ 2 ] - bounds[ 0 ];
float height = bounds[ 3 ] - bounds[ 1 ];
Tesselator tess = new Tesselator( );
Tesselator.Polygon boundingPoly = tess.CreateBoundingPolygon( bounds[ 0 ], bounds[ 1 ], width, height );
BuildConvexRegions( node, tess, boundingPoly );
m_Points = tess.Points.ToArray( );
}
