axmol/cocos/2d/CCCamera.cpp

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2008-2010 Ricardo Quesada

http://www.cocos2d-x.org

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#include "CCCamera.h"
#include "CCString.h"
#include "CCGL.h"

#include "CCDrawingPrimitives.h"
#include "CCDirector.h"
#include "kazmath/GL/matrix.h"

using namespace std;

NS_CC_BEGIN

Camera::Camera(void)
{
    init();
}

Camera::~Camera(void)
{
}

const char* Camera::description(void) const
{
    return String::createWithFormat("<Camera | center = (%.2f,%.2f,%.2f)>", _centerX, _centerY, _centerZ)->getCString();
}

void Camera::init(void)
{
    restore();
}

void Camera::restore(void)
{
    _eyeX = _eyeY = 0.0f;
    _eyeZ = getZEye();

    _centerX = _centerY = _centerZ = 0.0f;

    _upX = 0.0f;
    _upY = 1.0f;
    _upZ = 0.0f;

    kmMat4Identity(&_lookupMatrix);

    _dirty = false;
}

void Camera::locate(void)
{
    if (_dirty)
    {
        kmVec3 eye, center, up;

        kmVec3Fill(&eye, _eyeX, _eyeY , _eyeZ);
        kmVec3Fill(&center, _centerX, _centerY, _centerZ);

        kmVec3Fill(&up, _upX, _upY, _upZ);
        kmMat4LookAt(&_lookupMatrix, &eye, &center, &up);

        _dirty = false;
    }
    kmGLMultMatrix(&_lookupMatrix);
}

float Camera::getZEye(void)
{
    return FLT_EPSILON;
}

void Camera::setEye(float fEyeX, float fEyeY, float fEyeZ)
{
    _eyeX = fEyeX;
    _eyeY = fEyeY;
    _eyeZ = fEyeZ;

    _dirty = true;
}

void Camera::setCenter(float fCenterX, float fCenterY, float fCenterZ)
{
    _centerX = fCenterX;
    _centerY = fCenterY;
    _centerZ = fCenterZ;

    _dirty = true;
}

void Camera::setUp(float fUpX, float fUpY, float fUpZ)
{
    _upX = fUpX;
    _upY = fUpY;
    _upZ = fUpZ;

    _dirty = true;
}

void Camera::getEye(float *pEyeX, float *pEyeY, float *pEyeZ) const
{
    *pEyeX = _eyeX;
    *pEyeY = _eyeY;
    *pEyeZ = _eyeZ;
}

void Camera::getCenter(float *pCenterX, float *pCenterY, float *pCenterZ) const
{
    *pCenterX = _centerX;
    *pCenterY = _centerY;
    *pCenterZ = _centerZ;
}

void Camera::getUp(float *pUpX, float *pUpY, float *pUpZ) const
{
    *pUpX = _upX;
    *pUpY = _upY;
    *pUpZ = _upZ;
}

NS_CC_END