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)
{
}

std::string Camera::getDescription() 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 eyeX, float eyeY, float eyeZ)
{
    _eyeX = eyeX;
    _eyeY = eyeY;
    _eyeZ = eyeZ;

    _dirty = true;
}

void Camera::setCenter(float centerX, float centerY, float centerZ)
{
    _centerX = centerX;
    _centerY = centerY;
    _centerZ = centerZ;

    _dirty = true;
}

void Camera::setUp(float upX, float upY, float upZ)
{
    _upX = upX;
    _upY = upY;
    _upZ = upZ;

    _dirty = true;
}

void Camera::getEye(float *eyeX, float *eyeY, float *eyeZ) const
{
    *eyeX = _eyeX;
    *eyeY = _eyeY;
    *eyeZ = _eyeZ;
}

void Camera::getCenter(float *centerX, float *centerY, float *centerZ) const
{
    *centerX = _centerX;
    *centerY = _centerY;
    *centerZ = _centerZ;
}

void Camera::getUp(float *upX, float *upY, float *upZ) const
{
    *upX = _upX;
    *upY = _upY;
    *upZ = _upZ;
}

NS_CC_END