/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2009      On-Core
 
http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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****************************************************************************/
#ifndef __EFFECTS_CCGRID_H__
#define __EFFECTS_CCGRID_H__

#include "cocoa/CCObject.h"
#include "base_nodes/CCNode.h"
#include "CCCamera.h"
#include "ccTypes.h"
#include "textures/CCTexture2D.h"
#include "CCDirector.h"
#include "kazmath/mat4.h"

NS_CC_BEGIN

class CCTexture2D;
class CCGrabber;
class CCGLProgram;

/**
 * @addtogroup effects
 * @{
 */

/** Base class for other
*/
class CC_DLL CCGridBase : public CCObject
{
public:
    virtual ~CCGridBase(void);

    /** whether or not the grid is active */
    inline bool isActive(void) { return m_bActive; }
    void setActive(bool bActive);

    /** number of times that the grid will be reused */
    inline int getReuseGrid(void) { return m_nReuseGrid; }
    inline void setReuseGrid(int nReuseGrid) { m_nReuseGrid = nReuseGrid; }

    /** size of the grid */
    inline const ccGridSize& getGridSize(void) { return m_sGridSize; }
    inline void setGridSize(const ccGridSize& gridSize) { m_sGridSize = gridSize; }

    /** pixels between the grids */
    inline const CCPoint& getStep(void) { return m_obStep; }
    inline void setStep(const CCPoint& step) { m_obStep = step; }

    /** is texture flipped */
    inline bool isTextureFlipped(void) { return m_bIsTextureFlipped; }
    void setTextureFlipped(bool bFlipped);

    bool initWithSize(const ccGridSize& gridSize, CCTexture2D *pTexture, bool bFlipped);
    bool initWithSize(const ccGridSize& gridSize);

    void beforeDraw(void);
    void afterDraw(CCNode *pTarget);
    virtual void blit(void);
    virtual void reuse(void);
    virtual void calculateVertexPoints(void);

public:

    /** create one Grid */
    static CCGridBase* create(const ccGridSize& gridSize, CCTexture2D *texture, bool flipped);
    /** create one Grid */
    static CCGridBase* create(const ccGridSize& gridSize);

    void set2DProjection(void);

protected:
    bool m_bActive;
    int  m_nReuseGrid;
    ccGridSize m_sGridSize;
    CCTexture2D *m_pTexture;
    CCPoint m_obStep;
    CCGrabber *m_pGrabber;
    bool m_bIsTextureFlipped;
    CCGLProgram* m_pShaderProgram;
    ccDirectorProjection m_directorProjection;
};

/**
 CCGrid3D is a 3D grid implementation. Each vertex has 3 dimensions: x,y,z
 */
class CC_DLL CCGrid3D : public CCGridBase
{
public:
    CCGrid3D();
    ~CCGrid3D(void);

    /** returns the vertex at a given position */
    ccVertex3F vertex(const ccGridSize& pos);
    /** returns the original (non-transformed) vertex at a given position */
    ccVertex3F originalVertex(const ccGridSize& pos);
    /** sets a new vertex at a given position */
    void setVertex(const ccGridSize& pos, const ccVertex3F& vertex);

    virtual void blit(void);
    virtual void reuse(void);
    virtual void calculateVertexPoints(void);

public:
    /** create one Grid */
    static CCGrid3D* create(const ccGridSize& gridSize, CCTexture2D *pTexture, bool bFlipped);
    /** create one Grid */
    static CCGrid3D* create(const ccGridSize& gridSize);
    
protected:
    GLvoid *m_pTexCoordinates;
    GLvoid *m_pVertices;
    GLvoid *m_pOriginalVertices;
    GLushort *m_pIndices;
};

/**
 CCTiledGrid3D is a 3D grid implementation. It differs from Grid3D in that
 the tiles can be separated from the grid.
*/
class CC_DLL CCTiledGrid3D : public CCGridBase
{
public:
    CCTiledGrid3D();
    ~CCTiledGrid3D(void);

    /** returns the tile at the given position */
    ccQuad3 tile(const ccGridSize& pos);
    /** returns the original tile (untransformed) at the given position */
    ccQuad3 originalTile(const ccGridSize& pos);
    /** sets a new tile */
    void setTile(const ccGridSize& pos, const ccQuad3& coords);

    virtual void blit(void);
    virtual void reuse(void);
    virtual void calculateVertexPoints(void);

public:

    /** create one Grid */
    static CCTiledGrid3D* create(const ccGridSize& gridSize, CCTexture2D *pTexture, bool bFlipped);
    /** create one Grid */
    static CCTiledGrid3D* create(const ccGridSize& gridSize);
    
protected:
    GLvoid *m_pTexCoordinates;
    GLvoid *m_pVertices;
    GLvoid *m_pOriginalVertices;
    GLushort *m_pIndices;
};

// end of effects group
/// @}

NS_CC_END

#endif // __EFFECTS_CCGRID_H__