使用数学函数中的值在cocos2d-x中渲染

Question

早上好.

我在linux上,使用cocos2d-x Android.

我创建了一个计算圆值的函数.

        // Circle point updateCircle()
    // x = number of iteration · SamplingPeriod   |-|-|-|
    // y = A · sine ( 2 · PI · number of iteration · SamplingPeriod / Period )
    int iterations = this->getNumberOfIterations();
    CCPoint centerPoint = this->getCenter();
    float x = centerPoint.x + this->getAmplitude() * cos( 2 * M_PI * iterations * this->getSamplingPeriod() * this->getFrequency() );
    float y = centerPoint.y + this->getAmplitude() * sin( 2 * M_PI * iterations * this->getSamplingPeriod() * this->getFrequency() );

    _newPoint = ccp( x, y );

        // Create Array Actions
    CCArray *myActionsArray = new CCArray(3);

    // Set action move
    CCAction *actionMove1 = CCMoveTo::create(this->getSamplingPeriod(), newPoint);                         // Move to next point
        CCAction *actionMove2 = CCCallFuncN::create(this, callfuncN_selector(GameObject::updateCircle));       // call again this function

        // Insert Objects
    myActionsArray->insertObject(actionMove1, 0);
    myActionsArray->insertObject(actionMove2, 1);

    // Create Sequence
    CCAction *action = CCSequence::create(myActionsArray);

        // Set Tags
    action->setTag(kActionMove);

    // Run
    this->runAction(action);

    // Set new call to put new point in SamplingFrequency ms
    iterations += 1;
    static const int maxIterationCycle = 1 / (this->getSamplingPeriod() * this->getFrequency());
    if (iterations >= maxIterationCycle)
    {
        iterations = 1;
    }

    this->setNumberOfIterations(iterations);
    CCLog("texttx Iterations %d/%d", iterations, maxIterationCycle);

另外,我试过:

   
    // Set action move 
    CCAction *actionMove1 = CCCallFuncN::create(this, callfuncN_selector(GameObject::macroSetNewPoint));
    CCAction *actionMove2 = CCDelayTime::create(this->getSamplingPeriod());
    CCAction *actionMove3 = CCCallFuncN::create(this, callfuncN_selector(GameObject::updateCircle));

和

        // Set action move
    CCAction *actionMove1 = CCMoveTo::create(this->getSamplingPeriod(), _newPoint);
    CCAction *actionMove2 = CCDelayTime::create(this->getSamplingPeriod());
    CCAction *actionMove3 = CCCallFuncN::create(this, callfuncN_selector(GameObject::updateCircle));

问题是我的游戏对象在圆圈中移动,但是在大约1000次迭代之后,它会消失,并在几秒钟内再次出现.我不知道发生了什么 - 积分是正确计算的(我认为)

也许moveto需要更多时间来执行？我怎么能计算出一个数学赞助人来移动我的精灵呢？

Answer 1

我已经测试了你的代码并且工作正常.请检查您是否正在从另一个回调或其他内容更新某个点.如果数据是公共的,则可以由代码的另一部分更新.