axmol/cocos/editor-support/cocostudio/ActionTimeline/CCTimeLine.cpp

/****************************************************************************
Copyright (c) 2013 cocos2d-x.org

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#include "CCTimeLine.h"
#include "CCActionTimeline.h"

USING_NS_CC;

NS_TIMELINE_BEGIN

Timeline* Timeline::create()
{
    Timeline* object = new Timeline();
    if (object)
    {
        object->autorelease();
        return object;
    }
    CC_SAFE_DELETE(object);
    return nullptr;
}

Timeline::Timeline()
    : _currentKeyFrame(nullptr)
    , _currentKeyFrameIndex(0)
    , _fromIndex(0)
    , _toIndex(0)
    , _betweenDuration(0)
    , _actionTag(0)
    , _ActionTimeline(nullptr)
    , _node(nullptr)
{
}

Timeline::~Timeline()
{
}

void Timeline::gotoFrame(int frameIndex)
{
    if(_frames.size() == 0)
        return;

    binarySearchKeyFrame(frameIndex);
    apply(frameIndex);
}

void Timeline::stepToFrame(int frameIndex)
{
    if(_frames.size() == 0)
        return;

    updateCurrentKeyFrame(frameIndex);
    apply(frameIndex);
}

Timeline* Timeline::clone()
{
    Timeline* timeline = Timeline::create();
    timeline->_actionTag = _actionTag;

    for (auto frame : _frames)
    {
        Frame* newFrame = frame->clone();
        timeline->addFrame(newFrame);
    }

    return timeline;
}

void Timeline::addFrame(Frame* frame)
{
    _frames.pushBack(frame);
    frame->setTimeline(this);
}

void Timeline::insertFrame(Frame* frame, int index)
{
    _frames.insert(index, frame);
    frame->setTimeline(this);
}

void Timeline::removeFrame(Frame* frame)
{
    _frames.eraseObject(frame);
    frame->setTimeline(nullptr);
}

void Timeline::setNode(Node* node)
{
    for (auto frame : _frames)
    {
        frame->setNode(node);
    }
}

Node* Timeline::getNode() const
{
    return _node;
}

void Timeline::apply(int frameIndex)
{
    if (_currentKeyFrame)
    {
        float currentPercent = _betweenDuration == 0 ? 0 : (frameIndex - _currentKeyFrameIndex) / (float)_betweenDuration;
        _currentKeyFrame->apply(currentPercent);
    }
}

void Timeline::binarySearchKeyFrame(int frameIndex)
{
    Frame *from = nullptr;
    Frame *to   = nullptr;

    long length = _frames.size();
    bool needEnterFrame = false;

    do 
    {
        if (frameIndex < _frames.at(0)->getFrameIndex())
        {
            if(_currentKeyFrameIndex >= _frames.at(0)->getFrameIndex())
                needEnterFrame = true;

            from = to = _frames.at(0);
            _currentKeyFrameIndex = 0;
            _betweenDuration = _frames.at(0)->getFrameIndex();
            break;
        }
        else if(frameIndex >= _frames.at(length - 1)->getFrameIndex())
        {
            from = to = _frames.at(length - 1); 
            _currentKeyFrameIndex = _frames.at(length - 1)->getFrameIndex();
            _betweenDuration = 0;
            break;
        }

        int target = -1;
        int low=0,high=length-1,mid;
        while(low<=high){ 
            mid=(low+high)/2;
            if(frameIndex >= _frames.at(mid)->getFrameIndex() && frameIndex < _frames.at(mid+1)->getFrameIndex()) 
            {
                target = mid;
                break;
            }
            if(_frames.at(mid)->getFrameIndex()>frameIndex)
                high=mid-1; 
            else
                low=mid+1;
        }

        from = _frames.at(target);
        to   = _frames.at(target+1);

        if(target == 0 && _currentKeyFrameIndex<from->getFrameIndex())
            needEnterFrame = true;

        _currentKeyFrameIndex = from->getFrameIndex();
        _betweenDuration = to->getFrameIndex() - from->getFrameIndex();
    } while (0);

    if(needEnterFrame || _currentKeyFrame != from)
    {
        _currentKeyFrame = from;
        _currentKeyFrame->onEnter(to);
    }
}

void Timeline::updateCurrentKeyFrame(int frameIndex)
{
    //! If play to current frame's front or back, then find current frame again
    if (frameIndex < _currentKeyFrameIndex || frameIndex >= _currentKeyFrameIndex + _betweenDuration)
    {
        Frame *from = nullptr;
        Frame *to = nullptr;

        do 
        {
            long length = _frames.size();

            if (frameIndex < _frames.at(0)->getFrameIndex())
            {
                from = to = _frames.at(0);
                _currentKeyFrameIndex = 0;
                _betweenDuration = _frames.at(0)->getFrameIndex();
                break;
            }
            else if(frameIndex >= _frames.at(length - 1)->getFrameIndex())
            {
                from = to = _frames.at(length - 1);
                _currentKeyFrameIndex = _frames.at(length - 1)->getFrameIndex();
                _betweenDuration = 0;
                break;
            }

            do
            {
                _fromIndex = _toIndex;
                from = _frames.at(_fromIndex);
                _currentKeyFrameIndex  = from->getFrameIndex();

                _toIndex = _fromIndex + 1;
                if (_toIndex >= length)
                {
                    _toIndex = 0;
                }

                to = _frames.at(_toIndex);

                if (frameIndex == from->getFrameIndex())
                {
                    break;
                }
            }
            while (frameIndex < from->getFrameIndex() || frameIndex >= to->getFrameIndex());

            _betweenDuration = to->getFrameIndex() - from->getFrameIndex();

        } while (0);

        _currentKeyFrame = from;
        _currentKeyFrame->onEnter(to);
    }
}

NS_TIMELINE_END