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// Geometric Tools, LLC
// Copyright (c) 1998-2014
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
//
// File Version: 5.0.1 (2010/10/01)
#ifndef WM5SPATIAL_H
#define WM5SPATIAL_H
#include "Wm5GraphicsLIB.h"
#include "Wm5ControlledObject.h"
#include "Wm5Bound.h"
#include "Wm5Transform.h"
namespace Wm5
{
class Culler;
class WM5_GRAPHICS_ITEM Spatial : public ControlledObject
{
WM5_DECLARE_RTTI;
WM5_DECLARE_NAMES;
WM5_DECLARE_STREAM(Spatial);
protected:
// Abstract base class. Construction and destruction.
Spatial ();
public:
virtual ~Spatial ();
// Local and world transforms. In some situations you might need to set
// the world transform directly and bypass the Spatial::Update()
// mechanism. If World is set directly, the mWorldIsCurrent flag should
// be set to 'true'.
Transform LocalTransform;
Transform WorldTransform;
bool WorldTransformIsCurrent;
// World bound access. In some situations you might want to set the
// world bound directly and bypass the Spatial::Update() mechanism. If
// mWorldBound is set directly, the mWorldBoundIsCurrent flag should be
// set to 'true'.
Bound WorldBound;
bool WorldBoundIsCurrent;
// Culling parameters.
enum WM5_GRAPHICS_ITEM CullingMode
{
// Determine visibility state by comparing the world bounding volume
// to culling planes.
CULL_DYNAMIC,
// Force the object to be culled. If a Node is culled, its entire
// subtree is culled.
CULL_ALWAYS,
// Never cull the object. If a Node is never culled, its entire
// subtree is never culled. To accomplish this, the first time such
// a Node is encountered, the bNoCull parameter is set to 'true' in
// the recursive chain GetVisibleSet/OnGetVisibleSet.
CULL_NEVER
};
CullingMode Culling;
// Update of geometric state and controllers. The function computes world
// transformations on the downward pass of the scene graph traversal and
// world bounding volumes on the upward pass of the traversal.
void Update (double applicationTime = -Mathd::MAX_REAL,
bool initiator = true);
// Access to the parent object.
inline Spatial* GetParent ();
protected:
// Support for the geometric update.
virtual void UpdateWorldData (double applicationTime);
virtual void UpdateWorldBound () = 0;
void PropagateBoundToRoot ();
public_internal:
// Support for hierarchical culling.
void OnGetVisibleSet (Culler& culler, bool noCull);
virtual void GetVisibleSet (Culler& culler, bool noCull) = 0;
// Access to the parent object. Node calls this during attach/detach of
// children.
inline void SetParent (Spatial* parent);
protected:
// Support for a hierarchical scene graph. Spatial provides the parent
// pointer. Node provides the child pointers.
Spatial* mParent;
};
WM5_REGISTER_STREAM(Spatial);
typedef Pointer0<Spatial> SpatialPtr;
#include "Wm5Spatial.inl"
}
#endif
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