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99 lines
2.5 KiB
C++
99 lines
2.5 KiB
C++
#ifndef OPENMW_COMPONENTS_TERRAIN_QUADTREENODE_H
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#define OPENMW_COMPONENTS_TERRAIN_QUADTREENODE_H
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#include <osg/Group>
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#include "defs.hpp"
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namespace Terrain
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{
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enum ChildDirection
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{
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NW = 0,
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NE = 1,
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SW = 2,
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SE = 3,
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Root
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};
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class QuadTreeNode;
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class LodCallback : public osg::Referenced
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{
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public:
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virtual ~LodCallback() {}
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virtual bool isSufficientDetail(QuadTreeNode *node, const osg::Vec3f& eyePoint) = 0;
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};
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class ViewDataMap;
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class ViewData;
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class QuadTreeNode : public osg::Group
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{
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public:
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QuadTreeNode(QuadTreeNode* parent, ChildDirection dir, float size, const osg::Vec2f& center);
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virtual ~QuadTreeNode();
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QuadTreeNode* getParent();
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QuadTreeNode* getChild(unsigned int i);
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using osg::Group::getNumChildren;
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/// Returns our direction relative to the parent node, or Root if we are the root node.
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ChildDirection getDirection() { return mDirection; }
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/// Get neighbour node in this direction
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QuadTreeNode* getNeighbour (Direction dir);
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/// Initialize neighbours - do this after the quadtree is built
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void initNeighbours();
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void setBoundingBox(const osg::BoundingBox& boundingBox);
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const osg::BoundingBox& getBoundingBox() const;
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bool hasValidBounds() const { return mValidBounds; }
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virtual osg::BoundingSphere computeBound() const;
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/// size in cell coordinates
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float getSize() const;
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/// center in cell coordinates
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const osg::Vec2f& getCenter() const;
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virtual void traverse(osg::NodeVisitor& nv);
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/// Set the Lod callback to use for determining when to stop traversing further down the quad tree.
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void setLodCallback(LodCallback* lodCallback);
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LodCallback* getLodCallback();
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/// Set the view data map that the finally used nodes for a given camera/intersection are pushed onto.
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void setViewDataMap(ViewDataMap* map);
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ViewDataMap* getViewDataMap();
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/// Create or retrieve a view for the given traversal.
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ViewData* getView(osg::NodeVisitor& nv);
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private:
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QuadTreeNode* mParent;
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QuadTreeNode* mNeighbours[4];
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ChildDirection mDirection;
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osg::BoundingBox mBoundingBox;
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bool mValidBounds;
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float mSize;
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osg::Vec2f mCenter;
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osg::ref_ptr<LodCallback> mLodCallback;
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ViewDataMap* mViewDataMap;
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};
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}
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#endif
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