private ComponentWithMethod ComponentThatCanReceiveMethod(GameObject go, string methodName)
{
foreach (Component subComponent in go.GetComponents(typeof(Component)))
{
MethodInfo info = subComponent.GetType().GetMethod(methodName, BindingFlags.Public | BindingFlags.Instance);
if (info != null)
{
ComponentWithMethod result = new ComponentWithMethod();
result.component = subComponent;
result.method = info;
return(result);
}
}
/**
* didn't find aything on this object or its components.
* So ... check again on parent object. Keep going till you find a match or fail
*/
if (go.transform.parent != null)
{
return(ComponentThatCanReceiveMethod(go.transform.parent.gameObject, methodName));
}
return(new ComponentWithMethod());
}
void Update()
{
if (Input.GetMouseButtonDown(0)) //按下鼠标左键
{
//摄像机到鼠标点击处的射线
Ray mouseRay = Camera.main.ScreenPointToRay(Input.mousePosition);
//射线击中的物体
List <RaycastHit> orderedHits = new List <RaycastHit>(Physics.RaycastAll(mouseRay));
//给射线击中的物体排序
orderedHits.Sort((h1, h2) => h1.distance.CompareTo(h2.distance));
bool hasBeenConsumed = false;
foreach (RaycastHit hit in orderedHits)
{
if (hasBeenConsumed)
{
break;
}
ComponentWithMethod target = ComponentThatCanReceiveMethod(hit.collider.gameObject, "FixedOnMouseDown");
if (target.component != null)
{
//成功-返回包含返回值的object, 失败-返回null
object result = target.method.Invoke(target.component, null);
bool didConsume = (result == null) ? (true /** assume consumption if not specified */) : (bool)result;
if (!didConsume) //方法调用失败
{
continue;
}
else //方法调用成功
{
hasBeenConsumed = true;
break;
}
}
}
}
}
