cocos2d-x onMouseMove中CCTouch *pTouch参数的细节

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#ifndef __CC_TOUCH_H__
#define __CC_TOUCH_H__

#include "cocoa/CCObject.h"
#include "cocoa/CCGeometry.h"

NS_CC_BEGIN

/**
* @addtogroup input
* @{
*/

class CC_DLL CCTouch : public CCObject
{
public:
CCTouch()
: m_nId(0)
{}

/** returns the current touch location in OpenGL coordinates */
CCPoint getLocation() const;
/** returns the previous touch location in OpenGL coordinates */
CCPoint getPreviousLocation() const;
/** returns the delta of 2 current touches locations in screen coordinates */
CCPoint getDelta() const;
/** returns the current touch location in screen coordinates */
CCPoint getLocationInView() const;
/** returns the previous touch location in screen coordinates */
CCPoint getPreviousLocationInView() const;

/** returns the current touch location in screen coordinates
@deprecated: use CCTouch::getLocationInView() instead.
CCTouch::getLocation() is recommended, it will return OpenGL coordinate.
*/
CC_DEPRECATED_ATTRIBUTE CCPoint locationInView()  { return m_point; }

/** returns the current previous location in screen coordinates
@deprecated: use CCTouch::getPreviousLocationInView() instead.
CCTouch::getPreviousLocation() is recommended, it will return OpenGL coordinate.
*/
CC_DEPRECATED_ATTRIBUTE CCPoint previousLocationInView() { return m_prevPoint; }

void setTouchInfo(int id, float x, float y)
{
m_nId = id;
m_prevPoint = m_point;
m_point.x   = x;
m_point.y   = y;
}

int getID() const
{
return m_nId;
}

private:
int m_nId;
CCPoint m_point;
CCPoint m_prevPoint;
};

class CC_DLL CCEvent : public CCObject
{
};

// end of input group
/// @}

NS_CC_END

#endif  // __PLATFORM_TOUCH_H__