axmol/cocos2dx/include/CCCamera.h

/****************************************************************************
Copyright (c) 2010-2011 cocos2d-x.org
Copyright (c) 2008-2010 Ricardo Quesada
Copyright (c) 2011      Zynga Inc.

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#ifndef __CCCAMERA_H__
#define __CCCAMERA_H__

#include "CCObject.h"
#include "ccMacros.h"
#include <string>
#include "kazmath/mat4.h"

NS_CC_BEGIN

/** 
A CCCamera is used in every CCNode.
Useful to look at the object from different views.
The OpenGL gluLookAt() function is used to locate the
camera.

If the object is transformed by any of the scale, rotation or
position attributes, then they will override the camera.

IMPORTANT: Either your use the camera or the rotation/scale/position properties. You can't use both.
World coordinates won't work if you use the camera.

Limitations:

- Some nodes, like CCParallaxNode, CCParticle uses world node coordinates, and they won't work properly if you move them (or any of their ancestors)
using the camera.

- It doesn't work on batched nodes like CCSprite objects when they are parented to a CCSpriteBatchNode object.

- It is recommended to use it ONLY if you are going to create 3D effects. For 2D effecs, use the action CCFollow or position/scale/rotate.

*/
class CC_DLL CCCamera : public CCObject
{
protected:
    float m_fEyeX;
    float m_fEyeY;
    float m_fEyeZ;

    float m_fCenterX;
    float m_fCenterY;
    float m_fCenterZ;

    float m_fUpX;
    float m_fUpY;
    float m_fUpZ;

    bool m_bDirty;
    kmMat4    m_lookupMatrix;
public:
    CCCamera(void);
    ~CCCamera(void);

    void init(void);

    const char* description(void);

    /** sets the dirty value */
    inline void setDirty(bool bValue) { m_bDirty = bValue; }
    /** get the dirty value */
    inline bool getDirty(void) { return m_bDirty; }

    /** sets the camera in the default position */
    void restore(void);
    /** Sets the camera using gluLookAt using its eye, center and up_vector */
    void locate(void);
    /** sets the eye values in points */
    void setEyeXYZ(float fEyeX, float fEyeY, float fEyeZ);
    /** sets the center values in points */
    void setCenterXYZ(float fCenterX, float fCenterY, float fCenterZ);
    /** sets the up values */
    void setUpXYZ(float fUpX, float fUpY, float fUpZ);

    /** get the eye vector values in points */
    void getEyeXYZ(float *pEyeX, float *pEyeY, float *pEyeZ);
    /** get the center vector values int points */
    void getCenterXYZ(float *pCenterX, float *pCenterY, float *pCenterZ);
    /** get the up vector values */
    void getUpXYZ(float *pUpX, float *pUpY, float *pUpZ);
public:
    /** returns the Z eye */
    static float getZEye();

private:
    DISALLOW_COPY_AND_ASSIGN(CCCamera);
};

NS_CC_END

#endif // __CCCAMERA_H__