检查脚本相同时哪个对象与另一个对象发生碰撞 [英] Check Which object has collide with another object while scripts are same

问题描述

两个具有动画效果的汽车对象都包含刚体和盒子碰撞器，以及带有 OnTriggerEnter事件的脚本.

Two Animated car object both contains rigid-body and box collider and a script with OnTriggerEnter event.

现在，我想检查两辆车在行驶时哪辆车撞到了另一辆车.表示如果 A击中B或B击中A 都具有相同的脚本和相同的事件，则两个事件都将被触发.如何识别击中???的人?

Now I want to check that which car hit to another car while both cars are running. Means if A hit to B or B hit to A as both have same script and same event then, both event becomes trigger. How to identify it who hit ???

请记住，不建议我使用Raycast，因为它价格昂贵

例如，我制作了两个添加了方块碰撞器和刚体的立方体，以及一个包含(或选中)的脚本

For example I made two cube added box collider and rigidbody and a script that contains(or check)

void OnTriggerEnter(Collider c) {
        Debug.Log("GameObject is : " + gameObject.name + " and collider : " + c.name);

    }

现在，当我同时触发两个对象时，无论我将A对象击中B还是将B对象击中A，触发的顺序都保持不变.

Now when I triggering both object the order of trigger remain same no matter i hit A object to B or B object to A. How i will differentiate it?

推荐答案

我看到了几种方法，这是最简单的方法:

I see few ways, of which this is the easiest:

注意-RigidBidy需要具有速度，我的意思是您需要使用AddForce或任何其他基于物理的运动使用RigidBody移动对象.

Note - RigidBidy needs to have velocity, I mean you need to move objects with RigidBody using AddForce or any other physic based movement.

1. 检查速度. 获取每辆汽车的RigidBody并检查velocity-命中率更高的velocity Vector3.请注意，您需要在此处使用投影.

1. Checking the velocity. Getting RigidBody of every car and checking the velocity - the one with higher velocity Vector3 is the one that hits. Note that you need to use projection here.

void OnTriggerEnter(Collider c) 
{
    Debug.Log("GameObject is : " + gameObject.name + " and collider : " + c.name);

    Vector3 directionB = this.transform.position - c.transform.position;
    Vector3 directionA = c.transform.position - this.transform.position;

    Vector3 rawVelocityA = this.GetComponent<Rigidbody> ().velocity;
    Vector3 rawVelocityB = c.GetComponent<Rigidbody> ().velocity;

    Vector3 realSpeedA = Vector3.Project (rawVelocityA, directionA);
    Vector3 realSpeedB = Vector3.Project (rawVelocityB, directionB);

    if (realSpeedA.magnitude > realSpeedB.magnitude) 
    {
        Debug.Log ("A hit B");
    }
    else if (realSpeedB.magnitude > realSpeedA.magnitude) 
    {
        Debug.Log ("B hit A");
    }
    else
    {
        Debug.Log ("A hit B and B hit A");
    }
}

由于您没有使用物理学来移动汽车，因此需要以其他方式计算速度

我建议这样:

每辆车上都有一个SpeedSpeedulator.cs脚本.

Have a script SpeedCalculator.cs on each car.

public class SpeedCalculator : MonoBehaviour 
{
    public float Velocity
    {
        get
        {
            return velocity;
        }
    }
    private float velocity;

    private Vector3 lastPosition;

    void Awake()
    {
        lastPosition = transform.position;
    }

    void Update()
    {
        velocity = transform.position - lastPosition;
        lastPosition = transform.position;
    }
}

然后不要从RigidBody加速，而是从SpeedCalculator加速:

And then instead of taking speed from RigidBody take it from SpeedCalculator:

void OnTriggerEnter(Collider c) 
{
    Debug.Log("GameObject is : " + gameObject.name + " and collider : " + c.name);

    Vector3 directionB = this.transform.position - c.transform.position;
    Vector3 directionA = c.transform.position - this.transform.position;

    Vector3 rawVelocityA = this.GetComponent<SpeedCalculator> ().Velocity;
    Vector3 rawVelocityB = c.GetComponent<SpeedCalculator> ().Velocity;

    Vector3 realSpeedA = Vector3.Project (rawVelocityA, directionA);
    Vector3 realSpeedB = Vector3.Project (rawVelocityB, directionB);

    if (realSpeedA.magnitude > realSpeedB.magnitude) 
    {
        Debug.Log ("A hit B");
    }
    else if (realSpeedB.magnitude > realSpeedA.magnitude) 
    {
        Debug.Log ("B hit A");
    }
    else
    {
        Debug.Log ("A hit B and B hit A");
    }
}

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