axmol/cocos2dx/misc_nodes/CCMotionStreak.h

/****************************************************************************
Copyright (c) 2010-2012  cocos2d-x.org
Copyright (c) 2011 ForzeField Studios S.L.

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#ifndef __CCMOTION_STREAK_H__
#define __CCMOTION_STREAK_H__

#include "CCProtocols.h"
#include "textures/CCTexture2D.h"
#include "ccTypes.h"
#include "base_nodes/CCNode.h"
#ifdef EMSCRIPTEN
#include "base_nodes/CCGLBufferedNode.h"
#endif // EMSCRIPTEN

NS_CC_BEGIN

/**
 * @addtogroup misc_nodes
 * @{
 */

/** MotionStreak.
 Creates a trailing path.
 */
class CC_DLL MotionStreak : public NodeRGBA, public TextureProtocol
#ifdef EMSCRIPTEN
, public GLBufferedNode
#endif // EMSCRIPTEN
{
public:
    MotionStreak();
    virtual ~MotionStreak();

    /** creates and initializes a motion streak with fade in seconds, minimum segments, stroke's width, color, texture filename */
    static MotionStreak* create(float fade, float minSeg, float stroke, const ccColor3B& color, const char* path);
    /** creates and initializes a motion streak with fade in seconds, minimum segments, stroke's width, color, texture */
    static MotionStreak* create(float fade, float minSeg, float stroke, const ccColor3B& color, Texture2D* texture);

    /** initializes a motion streak with fade in seconds, minimum segments, stroke's width, color and texture filename */
    bool initWithFade(float fade, float minSeg, float stroke, const ccColor3B& color, const char* path);
    /** initializes a motion streak with fade in seconds, minimum segments, stroke's width, color and texture  */
    bool initWithFade(float fade, float minSeg, float stroke, const ccColor3B& color, Texture2D* texture);

    /** color used for the tint */
    void tintWithColor(const ccColor3B& colors);

    /** Remove all living segments of the ribbon */
    void reset();

    /** Override super methods */
    virtual void setPosition(const Point& position);
    virtual void draw();
    virtual void update(float delta);

    /* Implement interfaces */
    virtual Texture2D* getTexture(void);
    virtual void setTexture(Texture2D *texture);
    virtual void setBlendFunc(const ccBlendFunc &blendFunc);
    virtual const ccBlendFunc& getBlendFunc(void) const;
    virtual GLubyte getOpacity(void) const;
    virtual void setOpacity(GLubyte opacity);
    virtual void setOpacityModifyRGB(bool bValue);
    virtual bool isOpacityModifyRGB(void) const;

    /** When fast mode is enabled, new points are added faster but with lower precision */
    inline bool isFastMode() const { return _fastMode; }
    inline void setFastMode(bool bFastMode) { _fastMode = bFastMode; }

    inline bool isStartingPositionInitialized() const { return _startingPositionInitialized; }
    inline void setStartingPositionInitialized(bool bStartingPositionInitialized) 
    { 
        _startingPositionInitialized = bStartingPositionInitialized; 
    }
protected:
    bool _fastMode;
    bool _startingPositionInitialized;
private:
    /** texture used for the motion streak */
    Texture2D* _texture;
    ccBlendFunc _blendFunc;
    Point _positionR;

    float _stroke;
    float _fadeDelta;
    float _minSeg;

    unsigned int _maxPoints;
    unsigned int _nuPoints;
    unsigned int _previousNuPoints;

    /** Pointers */
    Point* _pointVertexes;
    float* _pointState;

    // Opengl
    ccVertex2F* _vertices;
    GLubyte* _colorPointer;
    ccTex2F* _texCoords;
};

// end of misc_nodes group
/// @}

NS_CC_END

#endif //__CCMOTION_STREAK_H__