axmol/cocos/2d/CCTransitionPageTurn.cpp

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2009      Sindesso Pty Ltd http://www.sindesso.com/

http://www.cocos2d-x.org

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****************************************************************************/

#include "CCTransitionPageTurn.h"
#include "CCDirector.h"
#include "CCActionInterval.h"
#include "CCActionInstant.h"
#include "CCActionGrid.h"
#include "CCActionPageTurn3D.h"
#include "CCNodeGrid.h"
#include "renderer/CCRenderer.h"

NS_CC_BEGIN

float TransitionPageTurn::POLYGON_OFFSET_FACTOR = -20.f;
float TransitionPageTurn::POLYGON_OFFSET_UNITS = -20.f;

TransitionPageTurn::TransitionPageTurn()
{
    _inSceneProxy = NodeGrid::create();
    _outSceneProxy = NodeGrid::create();
    
    _inSceneProxy->retain();
    _outSceneProxy->retain();
}

TransitionPageTurn::~TransitionPageTurn()
{
    CC_SAFE_RELEASE(_inSceneProxy);
    CC_SAFE_RELEASE(_outSceneProxy);
}

/** creates a base transition with duration and incoming scene */
TransitionPageTurn * TransitionPageTurn::create(float t, Scene *scene, bool backwards)
{
    TransitionPageTurn * transition = new TransitionPageTurn();
    transition->initWithDuration(t,scene,backwards);
    transition->autorelease();
    return transition;
}

/** initializes a transition with duration and incoming scene */
bool TransitionPageTurn::initWithDuration(float t, Scene *scene, bool backwards)
{
    // XXX: needed before [super init]
    _back = backwards;

    if (TransitionScene::initWithDuration(t, scene))
    {
        // do something
    }
    return true;
}

void TransitionPageTurn::sceneOrder()
{
    _isInSceneOnTop = _back;
}

void TransitionPageTurn::onEnablePolygonOffset()
{
    glEnable(GL_POLYGON_OFFSET_FILL);
    glPolygonOffset(POLYGON_OFFSET_FACTOR, POLYGON_OFFSET_UNITS);
}

void TransitionPageTurn::onDisablePolygonOffset()
{
    glDisable(GL_POLYGON_OFFSET_FILL);
    glPolygonOffset(0, 0);
}

void TransitionPageTurn::draw()
{
    Scene::draw();
    
    if( _isInSceneOnTop ) {
        _outSceneProxy->visit();
        _enableOffsetCmd.init(0, _vertexZ);
        _enableOffsetCmd.func = CC_CALLBACK_0(TransitionPageTurn::onEnablePolygonOffset, this);
        Director::getInstance()->getRenderer()->addCommand(&_enableOffsetCmd);
        _inSceneProxy->visit();
        _disableOffsetCmd.init(0, _vertexZ);
        _disableOffsetCmd.func = CC_CALLBACK_0(TransitionPageTurn::onDisablePolygonOffset, this);
        Director::getInstance()->getRenderer()->addCommand(&_disableOffsetCmd);
    } else {
        _inSceneProxy->visit();
        
        _enableOffsetCmd.init(0, _vertexZ);
        _enableOffsetCmd.func = CC_CALLBACK_0(TransitionPageTurn::onEnablePolygonOffset, this);
        Director::getInstance()->getRenderer()->addCommand(&_enableOffsetCmd);
        
        _outSceneProxy->visit();
        
        _disableOffsetCmd.init(0, _vertexZ);
        _disableOffsetCmd.func = CC_CALLBACK_0(TransitionPageTurn::onDisablePolygonOffset, this);
        Director::getInstance()->getRenderer()->addCommand(&_disableOffsetCmd);
    }
}

void TransitionPageTurn::onEnter()
{
    TransitionScene::onEnter();

    _inSceneProxy->setTarget(_inScene);
    _outSceneProxy->setTarget(_outScene);

    _inSceneProxy->onEnter();
    _outSceneProxy->onEnter();
    
    Size s = Director::getInstance()->getWinSize();
    int x,y;
    if (s.width > s.height)
    {
        x=16;
        y=12;
    }
    else
    {
        x=12;
        y=16;
    }

    ActionInterval *action  = this->actionWithSize(Size(x,y));

    if (! _back )
    {
        _outSceneProxy->runAction
        (
            Sequence::create
            (
                action,
                CallFunc::create(CC_CALLBACK_0(TransitionScene::finish,this)),
                StopGrid::create(),
                nullptr
            )
        );
    }
    else
    {
        // to prevent initial flicker
        _inSceneProxy->setVisible(false);
        _inSceneProxy->runAction
        (
            Sequence::create
            (
                Show::create(),
                action,
                CallFunc::create(CC_CALLBACK_0(TransitionScene::finish,this)),
                StopGrid::create(),
                nullptr
            )
        );
    }
}
void TransitionPageTurn::onExit()
{
    _outSceneProxy->setTarget(nullptr);
    _outSceneProxy->setTarget(nullptr);
    _outSceneProxy->onExit();
    _inSceneProxy->onExit();
    
    TransitionScene::onExit();
}

ActionInterval* TransitionPageTurn:: actionWithSize(const Size& vector)
{
    if (_back)
    {
        // Get hold of the PageTurn3DAction
        return ReverseTime::create
        (
            PageTurn3D::create(_duration, vector)
        );
    }
    else
    {
        // Get hold of the PageTurn3DAction
        return PageTurn3D::create(_duration, vector);
    }
}

NS_CC_END