apps/openmw/mwrender/localmap.hpp

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#ifndef _GAME_RENDER_LOCALMAP_H
#define _GAME_RENDER_LOCALMAP_H

#include <openengine/ogre/renderer.hpp>

#include <OgreAxisAlignedBox.h>
#include <OgreColourValue.h>

namespace MWWorld
{
    class CellStore;
}

namespace MWRender
{
    class RenderingManager;

    class LocalMap
    {
    public:
        LocalMap(OEngine::Render::OgreRenderer*, MWRender::RenderingManager* rendering);
        ~LocalMap();

        void requestMap (MWWorld::CellStore* cell, float zMin, float zMax);

        void requestMap (MWWorld::CellStore* cell,
                        Ogre::AxisAlignedBox bounds);

        void updatePlayer (const Ogre::Vector3& position, const Ogre::Quaternion& orientation);

        void saveFogOfWar(MWWorld::CellStore* cell);

        void getInteriorMapPosition (Ogre::Vector2 pos, float& nX, float& nY, int& x, int& y);

        bool isPositionExplored (float nX, float nY, int x, int y, bool interior);

    private:
        OEngine::Render::OgreRenderer* mRendering;
        MWRender::RenderingManager* mRenderingManager;

        // 1024*1024 pixels for a cell
        static const int sMapResolution = 512;

        // the dynamic texture is a bottleneck, so don't set this too high
        static const int sFogOfWarResolution = 32;

        // frames to skip before rendering fog of war
        static const int sFogOfWarSkip = 2;

        // size of a map segment (for exteriors, 1 cell)
        static const int sSize = 8192;

        Ogre::Camera* mCellCamera;
        Ogre::SceneNode* mCameraNode;
        Ogre::SceneNode* mCameraPosNode;
        Ogre::SceneNode* mCameraRotNode;

        // directional light from a fixed angle
        Ogre::Light* mLight;

        float mAngle;
        const Ogre::Vector2 rotatePoint(const Ogre::Vector2& p, const Ogre::Vector2& c, const float angle);

        void render(const float x, const float y,
                    const float zlow, const float zhigh,
                    const float xw, const float yw,
                    const std::string& texture);

        void saveTexture(const std::string& texname, const std::string& filename);

        std::string coordStr(const int x, const int y);

        // a buffer for the "fog of war" texture of the current cell.
        // interior cells could be divided into multiple textures,
        // so we store in a map.
        std::map <std::string, std::vector<Ogre::uint32> > mBuffers;

        void deleteBuffers();

        bool mInterior;
        int mCellX, mCellY;
        Ogre::AxisAlignedBox mBounds;
        std::string mInteriorName;
    };

}
#endif