将CCSprite移动到另一个CCSprite圆形 [英] Move CCSprite around another CCSprite Circle Shape

问题描述

我想要达到的目的是：

我们有CCSprite Circle A和CCSprite Circle B.

We have CCSprite Circle A and CCSprite Circle B.

我已经尝试创建一个CCNode并附加圆圈B到它。在这种情况下，它工作完美，但位置也是恒定的。我需要移动圆周围A和更新位置。我将在屏幕上有更多的对象，我将检查B是否与其他对象相交，但是对于这种情况，我需要在旋转时更新位置。非常感谢你的帮助家伙。我使用Cocos2D v3.0

Move Circle B around Circle A. I already tried to create a CCNode and attach the circle B to it. In this case it works perfectly but the position is constant also. I need to move the circle around A and update the position. I will have more objects on the screen and I will check if B intersect some other objects, but for that case I need to update the position while rotating. Much appreciate your help guys. I am using Cocos2D v3.0

推荐答案

也许这样吗？将其放在您的更新方法中。我在我的box2d项目中使用这个代码进行轨道。根据您的需要更改它。

Maybe something like this? Put this in your update method. I used this code in my box2d project for orbit. Change it for your needs.

    b2Vec2 center = bodyA->GetPosition();
    int smoothness = 1000;
    int radius = 100;

    for (int i = 0; i < smoothness; i++) {
        float angle = (i / smoothness) * 360 * DEGTORAD;

        b2Vec2 pos( sinf(angle), cosf(angle));
        b2Vec2 newposition = center + radius * pos;

        bodyB->SetTransform(newposition, bodyB->GetAngle());

 }

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