// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
/** \file
\author Tim Shead (tshead@k-3d.com)
*/
#include "algebra.h"
namespace k3d
{
class iunknown;
class point3;
/// Returns a node's position in world coordinates (returns the origin for non-transformable nodes)
const point3 world_position(iunknown& Node);
/// Returns a complete, concatenated, node-to-world transformation matrix for the given transformable node. Returns an identity matrix for non-transformable node.
/// Returns a complete, concatenated, parent-node-to-world transformation matrix for the given transformable node. Returns an identity matrix for non-transformable nodes, or transformable nodes without a parent
/// Sets the transformation matrix (in world coordinates) for a node, automatically adjusts for the parentage of a node. Returns upstream transformation pointer when created, returns 0 if the existing one was updated.