c# - 如何检查 2 个触发器是否会发生碰撞？

Question

我用这部分来实例化head :

GameObject refhead = (GameObject)Instantiate(Resources.Load("Head"), new Vector3(1, 1, 0), Quaternion.Euler(0, 0, 0));
GameObject head = (GameObject)Instantiate(refhead, transform);

但我如何检查它是否会与 block 发生冲突？或不？我的意思是，如何检查 block 是否位于坐标 (x, y, z)？例如，我想生成 head在 (1, 1, 0)如果head将与 block (trigger) 相撞, 我用 y += 1; .再次需要检查的是 block trigger位于 (1, 2, 0) ？如果是，需要打卡(1, 3, 0)等等 如果block不在这里，头会生成。

Answer 1

编辑:为基于 2D 和 3D 物理的代码添加示例。

二维:

public Vector2 topLeftCorner;
public Vector2 bottomRightCorner;
public int layerMask; // Layer mask to check against (optional)
public float minDepth // Only include objects with a Z coordinate (depth) greater than or equal to this value. (optional)
public float maxDepth // Only include objects with a Z coordinate (depth) less than or equal to this value. (optional)


// casts a box using given coordinates and returns all found colliders
Collider2D[] foundColliders = Physics2D.OverlapAreaAll(topLeftCorner, bottomRightCorner, layerMask, minDepth, maxDepth);

if (foundColliders.Length == 0) {
  // can spawn things
}

查找更多信息here

3D:

检查这一点的一种简单方法是使用 Physics.CheckSphere 在生成对象之前检查指定位置是否已存在游戏对象。

 // define all locations you want to check in order
 public Vector3[] checkPositions;
 // radius to check for, depending on block size
 public float blockSize = 1.0f

 foreach (Vector3 checkPos in checkPositions) {
     if (Physics.CheckSphere (checkPos, blockSize)) {
         // found something
         Debug.Log('cannot spawn here!', checkPos);
     } else {
         // spot is empty, we can spawn
         refhead.transform.position = checkPos;
         head = (GameObject)Instantiate(refhead, parentTransform);
         break;
     }
 }