extentTriInd.h

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/*********************************************************************
** Copyright (c) 2000 MaK Technologies, Inc.
** All rights reserved.
*********************************************************************/
/*********************************************************************
** $RCSfile: extentTriInd.h,v $ $Revision: 1.2 $ $State: Exp $
*********************************************************************/

#ifndef extentTriInd_H_
#define extentTriInd_H_

#include "gdb/gdbDefines.h"
#include "gdb/triInd.h"
#include <vlutil/vlPrint.h>


// forward declarations
class DtSurfaceManager;
class DtPolygonIndirect;


// class DtExtentTriangleIndirect:
//
// DtTriangleIndirect allows for the specification of the
// triangles that define the extent of an external DtFileNode. These
// triangles are created for the sole purpose of distinguishing then
// from real terrain polygons when calculating intersections using
// OPCODE. When an intersection with a triangle of this kind occurs
// it means that the intersection did not happen in a real polygon
// of the terrain, instead, it happened inside the DtFileNode extents
// and its underlying terrain database needs to be loaded for further
// intersection tests.

class DT_DLL_gdb DtExtentTriangleIndirect : public DtTriangleIndirect
{
public:
   
   // returns type of gdb node
   virtual DtGdbNode::DtGdbNodeType type() const;

   virtual void setOwner(DtGdbNode* owner);

   virtual DtGdbNode* owner() const;

protected:

   DtGdbNode*           myOwner;   // pointer to the node's owner
};


inline DtGdbNode::DtGdbNodeType DtExtentTriangleIndirect::type() const
{
   return DtGdbNode::EXTENT_TRIANGLE_INDIRECT;
}

#endif