有沒有辦法在運行時為對撞機輪廓著色？

我有一個帶有盒子對撞機的空游戲物件。當我選擇空的游戲物件時，它會在編輯器場景視圖視窗中顯示對撞機。但是有沒有辦法在不選擇游戲物件的情況下在編輯器/運行時對碰撞器大小線進行著色或標記？

我想以某種方式查看并知道玩家何時離開/進入碰撞區域。問題是您在運行時看不到它。

我有兩個事件，ontriggerenter 和 ontriggerexit，但我希望在玩家離開/進入該區域時看到一些視覺效果。

private void OnTriggerExit(Collider other)
    {
        if (other.name == "Colliding Area")
        {
            GameObject go = Instantiate(positionMarkerPrefab);
            Renderer rend = go.GetComponent<Renderer>();
            rend.material.color = Color.red;

            StartCoroutine(SlowDown());
        }
    }

    private void OnTriggerEnter(Collider other)
    {
        if (other.name == "Colliding Area")
        {
            GameObject go = Instantiate(positionMarkerPrefab);
            Renderer rend = go.GetComponent<Renderer>();
            rend.material.color = Color.black;

            if (increaseSpeed == false)
            {
                enteredPositionBack = transform.position;
            }
        }
    }

uj5u.com熱心網友回復：

您可以使用OnDrawGizmos在運行時繪制盒子碰撞器的邊界。但是這些線條只會在編輯器場景視圖中可見。這是一個例子：

private BoxCollider boxCollider = null;
    
private void Start()
{
    boxCollider = GetComponent<BoxCollider>();
}

private void OnDrawGizmos()
{
    if (boxCollider)
    {
        Matrix4x4 rotationMatrix = Matrix4x4.TRS(boxCollider.transform.position, boxCollider.transform.rotation, boxCollider.transform.lossyScale);
        Gizmos.matrix = rotationMatrix;
        Gizmos.DrawWireCube(boxCollider.center, boxCollider.size);
    }
}

但是，您可以使用線渲染器在游戲視圖中可視化盒子碰撞器邊界。這是一個例子，它并不漂亮，但它完成了作業：

private List<LineRenderer> lines = new List<LineRenderer>();

private void Start()
{
    BoxCollider boxCollider = GetComponent<BoxCollider>();
    if (boxCollider != null)
    {
        Material material = new Material(Shader.Find("Unlit/Color"));
        Color color = Color.green;
        material.color = color;
        float width = 0.01f;
        Vector3 rightDir = boxCollider.transform.right.normalized;
        Vector3 forwardDir = boxCollider.transform.forward.normalized;
        Vector3 upDir = boxCollider.transform.up.normalized;
        Vector3 center = boxCollider.transform.position   boxCollider.center;
        Vector3 size = boxCollider.size;
        size.x *= boxCollider.transform.lossyScale.x;
        size.y *= boxCollider.transform.lossyScale.y;
        size.z *= boxCollider.transform.lossyScale.z;
        DrawLine(center   upDir * size.y / 2f   rightDir * size.x / 2f   forwardDir * size.z / 2f, center   upDir * size.y / 2f - rightDir * size.x / 2f   forwardDir * size.z / 2f, color, material, width);
        DrawLine(center - upDir * size.y / 2f   rightDir * size.x / 2f   forwardDir * size.z / 2f, center - upDir * size.y / 2f - rightDir * size.x / 2f   forwardDir * size.z / 2f, color, material, width);
        DrawLine(center   upDir * size.y / 2f   rightDir * size.x / 2f   forwardDir * size.z / 2f, center - upDir * size.y / 2f   rightDir * size.x / 2f   forwardDir * size.z / 2f, color, material, width);
        DrawLine(center   upDir * size.y / 2f - rightDir * size.x / 2f   forwardDir * size.z / 2f, center - upDir * size.y / 2f - rightDir * size.x / 2f   forwardDir * size.z / 2f, color, material, width);
        DrawLine(center   upDir * size.y / 2f   rightDir * size.x / 2f - forwardDir * size.z / 2f, center   upDir * size.y / 2f - rightDir * size.x / 2f - forwardDir * size.z / 2f, color, material, width);
        DrawLine(center - upDir * size.y / 2f   rightDir * size.x / 2f - forwardDir * size.z / 2f, center - upDir * size.y / 2f - rightDir * size.x / 2f - forwardDir * size.z / 2f, color, material, width);
        DrawLine(center   upDir * size.y / 2f   rightDir * size.x / 2f - forwardDir * size.z / 2f, center - upDir * size.y / 2f   rightDir * size.x / 2f - forwardDir * size.z / 2f, color, material, width);
        DrawLine(center   upDir * size.y / 2f - rightDir * size.x / 2f - forwardDir * size.z / 2f, center - upDir * size.y / 2f - rightDir * size.x / 2f - forwardDir * size.z / 2f, color, material, width);
        DrawLine(center   upDir * size.y / 2f   rightDir * size.x / 2f   forwardDir * size.z / 2f, center   upDir * size.y / 2f   rightDir * size.x / 2f - forwardDir * size.z / 2f, color, material, width);
        DrawLine(center - upDir * size.y / 2f   rightDir * size.x / 2f   forwardDir * size.z / 2f, center - upDir * size.y / 2f   rightDir * size.x / 2f - forwardDir * size.z / 2f, color, material, width);
        DrawLine(center   upDir * size.y / 2f - rightDir * size.x / 2f   forwardDir * size.z / 2f, center   upDir * size.y / 2f - rightDir * size.x / 2f - forwardDir * size.z / 2f, color, material, width);
        DrawLine(center - upDir * size.y / 2f - rightDir * size.x / 2f   forwardDir * size.z / 2f, center - upDir * size.y / 2f - rightDir * size.x / 2f - forwardDir * size.z / 2f, color, material, width);
    }
}

private void DrawLine(Vector3 start, Vector3 end, Color color, Material material, float width = 0.01f)
{
    LineRenderer line = new GameObject("Line_"   start.ToString()   "_"   end.ToString()).AddComponent<LineRenderer>();
    line.material = material;
    line.startColor = color;
    line.endColor = color;
    line.startWidth = width;
    line.endWidth = width;
    line.positionCount = 2;
    line.useWorldSpace = true;
    line.SetPosition(0, start);
    line.SetPosition(1, end);
    line.transform.SetParent(transform);
    lines.Add(line);
}

public void SetLinesColor(Color color)
{
    for (int i = 0; i < lines.Count; i  )
    {
        lines[i].material.color = color;
        lines[i].startColor = color;
        lines[i].endColor = color;
    }
}

標籤：C＃ unity3d

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