c# - 第三人称射击游戏的光线转换

Question

我需要从我的玩家角色到相机光线转换的命中对象进行光线转换，但我无法让我的代码工作，它似乎总是偏移。

        void Update () {

    RaycastHit hit;
    Ray playerAim = playerCamera.GetComponent < Camera > ().ScreenPointToRay(new Vector3(Screen.width / 2, Screen.height / 2 ));
    Physics.Raycast(playerAim, out hit);
    Debug.DrawRay(playerAim.origin, playerAim.direction * hit.distance, Color.green);

    if (Physics.Raycast(playerAim, out hit)){
        // something was hit
        RaycastHit playerHit;
        Physics.Raycast(transform.position, hit.transform.position,  out playerHit);
        Debug.DrawRay(transform.position, playerHit.transform.position, Color.red);

        Debug.Log ("Distance from camera: "+ hit.distance);
        Debug.Log ("Distance from player: "+ playerHit.distance);
    }
}

/image/HzdVU.jpg

我以为Debug.DrawRay(transform.position, playerHit.transform.position, Color.red);应该从我的玩家到摄像机击中点的绿线末端画一条红线，而不是射入地板。

Answer 1

将 Debug.DrawRay 更改为 Debug.DrawLine!

Debug.DrawRay 需要一个 Vector3 作为原点和一个 Vector3 作为方向，而不是第二个“目标”位置。

这是我的解决方案!

void FixedUpdate() {

    RaycastHit cameraHit;
    Ray cameraAim = playerCamera.GetComponent < Camera > ().ScreenPointToRay(new Vector3(Screen.width / 2, Screen.height / 2 ));
    Physics.Raycast(cameraAim, out cameraHit, 100f);
    Debug.DrawLine(cameraAim.origin, cameraHit.point, Color.green);
    Vector3 cameraHitPoint = cameraHit.point;
    float cameraDistance = cameraHit.distance;

    if (Physics.Raycast(cameraAim, out cameraHit)){
        // something was hit
        RaycastHit playerHit;
        Physics.Raycast(transform.position + new Vector3 (0f, 1.8f, 0f), cameraHitPoint-transform.position - new Vector3 (0f, 1.8f, 0f), out playerHit, 100f);
        Debug.DrawRay(transform.position + new Vector3 (0f, 1.8f, 0f), cameraHitPoint-transform.position - new Vector3 (0f, 1.8f, 0f), Color.red);

        float playerDistance = playerHit.distance;
        Debug.Log ("Distance from player: "+ playerDistance);
        Debug.Log ("Distance from camera: "+ cameraDistance);
    }

}