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aillieo
2017-06-27 09:46:43 +08:00
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docs/06 In Practice/2D-Game/05 Collisions/02 Collision detection.md
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@@ -145,11 +145,9 @@ GLboolean CheckCollision(BallObject &one, GameObject &two) // AABB - Circle coll
我们创建了CheckCollision的一个重载函数用于专门处理一个BallObject和一个GameObject的情况。因为我们并没有在对象中保存碰撞外形的信息，因此我们必须为其计算：首先计算球心，然后是AABB的半边长及中心。 我们创建了CheckCollision的一个重载函数用于专门处理一个BallObject和一个GameObject的情况。因为我们并没有在对象中保存碰撞外形的信息，因此我们必须为其计算：首先计算球心，然后是AABB的半边长及中心。
使用这些碰撞外形的参数，我们计算出矢量差D¯D¯然后得到限制后的值，并与AABB中心相加得到最近的点P¯P¯。然后计算出圆心和最近点的矢量差D′¯D′¯并返回两个外形是否碰撞。
Using these collision shape attributes we calculate vector D¯D¯ as difference that we then clamp to clamped and add to the AABB's center to get point P¯P¯ as closest. Then we calculate the difference vector D′¯D′¯ between center and closestand return whether the two shapes collided or not. 之前我们调用CheckCollision时将球对象作为其第一个参数，因此现在CheckCollision的重载变量会自动生效，我们无需修改任何代码。现在的结果会比之前的碰撞检测算法更准确。
看起来生效了，但仍缺少一些东西。我们准确地检测了所有碰撞，但碰撞并没有对球产生任何反作用。我们需要在碰撞时产生一些**反作用**，例如当碰撞发生时，更新球的位置和/或速度。这将是[下一个]()教程的主题。
Since we previously called CheckCollision with the ball object as its first argument, we do not have to change any code since the overloaded variant of CheckCollision now automatically applies. The result is now a much more precise collision detection algorithm.
It seems to work, but still something is off. We properly do all the collision detection, but the ball does not react in any way to the collisions. We need to **react** to the collisions e.g. update the ball's position and/or velocity whenever a collision occurs. This is the topic of the [next](https://learnopengl.com/#!In-Practice/2D-Game/Collisions/Collision-resolution) tutorial.

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docs/06 In Practice/2D-Game/05 Collisions/03 Collision resolution.md
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# 碰撞处理 # 碰撞处理
At the end of the last tutorial we had a working collision detection scheme. However, the ball does not react in any way to the detected collisions; it just moves straight through all the bricks. We want the ball to *bounce* of the collided bricks. This tutorial discusses how we can accomplish this so called collision resolution within the AABB - circle collision detection scheme. 上个教程的最后，我们得到了一种有效的碰撞检测方案。但是球对检测到的碰撞不会有反作用；它仅仅是径直穿过所有的砖块。我们希望球会从撞击到的砖块**反弹**。此教程将讨论如何使用AABB-圆碰撞方案实现这项称为碰撞处理 (collision resolution)的功能。
Whenever a collision occurs we want two things to happen: we want to reposition the ball so it is no longer inside the other object and second, we want to change the direction of the ball's velocity so it looks like its bouncing of the object. Whenever a collision occurs we want two things to happen: we want to reposition the ball so it is no longer inside the other object and second, we want to change the direction of the ball's velocity so it looks like its bouncing of the object.