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101 lines
2.5 KiB
C++
101 lines
2.5 KiB
C++
#ifndef OPENMW_COMPONENTS_TERRAIN_VIEWDATA_H
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#define OPENMW_COMPONENTS_TERRAIN_VIEWDATA_H
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#include <vector>
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#include <deque>
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#include <osg/Node>
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#include "world.hpp"
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namespace Terrain
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{
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class QuadTreeNode;
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class ViewData : public View
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{
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public:
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ViewData();
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~ViewData();
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void add(QuadTreeNode* node, bool visible);
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void reset();
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void clear();
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bool contains(QuadTreeNode* node);
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void copyFrom(const ViewData& other);
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struct Entry
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{
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Entry();
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bool set(QuadTreeNode* node, bool visible);
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QuadTreeNode* mNode;
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bool mVisible;
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unsigned int mLodFlags;
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osg::ref_ptr<osg::Node> mRenderingNode;
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};
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unsigned int getNumEntries() const;
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Entry& getEntry(unsigned int i);
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double getLastUsageTimeStamp() const { return mLastUsageTimeStamp; }
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void setLastUsageTimeStamp(double timeStamp) { mLastUsageTimeStamp = timeStamp; }
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/// @return Have any nodes changed since the last frame
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bool hasChanged() const;
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void markUnchanged() { mChanged = false; }
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bool hasViewPoint() const;
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void setViewPoint(const osg::Vec3f& viewPoint);
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const osg::Vec3f& getViewPoint() const;
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private:
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std::vector<Entry> mEntries;
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unsigned int mNumEntries;
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double mLastUsageTimeStamp;
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bool mChanged;
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osg::Vec3f mViewPoint;
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bool mHasViewPoint;
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};
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class ViewDataMap : public osg::Referenced
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{
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public:
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ViewDataMap()
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: mReuseDistance(300) // large value should be safe because the visibility of each node is still updated individually for each camera even if the base view was reused.
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// this value also serves as a threshold for when a newly loaded LOD gets unloaded again so that if you hover around an LOD transition point the LODs won't keep loading and unloading all the time.
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, mExpiryDelay(1.f)
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{}
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ViewData* getViewData(osg::Object* viewer, const osg::Vec3f& viewPoint, bool& needsUpdate);
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ViewData* createOrReuseView();
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void clearUnusedViews(double referenceTime);
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void clear();
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private:
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std::list<ViewData> mViewVector;
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typedef std::map<osg::ref_ptr<osg::Object>, ViewData*> Map;
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Map mViews;
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float mReuseDistance;
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float mExpiryDelay; // time in seconds for unused view to be removed
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std::deque<ViewData*> mUnusedViews;
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};
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}
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#endif
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