public void Update()
{
m_overUnit = null;
m_hasDown = false;
//如果上一帧点击了, 那么本帧就清理对象
if (m_hasClicked)
{
m_hasClicked = false;
m_hitUnit = null;
}
if (!m_enabled)
{
return;
}
var cam = Camera.main;
if (cam == null)
{
return;
}
//每帧我们都探测鼠标经过terrain的位置
m_overWorldPos = Vector3.zero;
Vector3 mousePos = Input.mousePosition;
Ray ray = cam.ScreenPointToRay(mousePos);
RaycastHit hit;
int layerMask = 1 << LayerMask.NameToLayer(CWorldLayer.LAYER_NAME_TERRAIN);
if (Physics.Raycast(ray, out hit, 1000f, layerMask))
{
m_overWorldPos = hit.point;
}
//探测我们是否经过了某个单位
layerMask = 1 << LayerMask.NameToLayer(CWorldLayer.LAYER_NAME_UNIT);
if (Physics.Raycast(ray, out hit, 1000f, layerMask))
{
m_overUnit = hit.transform;
}
if (Input.GetMouseButtonDown(0))
{
if (EventSystem.current != null)
{
bool clickUI = EventSystem.current.IsPointerOverGameObject();
if (clickUI)
{
return;
}
}
m_lastDownTime = CTimeUtil.GetCurrentMillSecondStamp();
m_downScreenPos = mousePos;
m_hasDown = true;
}
//鼠标松开
if (Input.GetMouseButtonUp(0))
{
long delta = CTimeUtil.GetCurrentMillSecondStamp() - m_lastDownTime;
if (delta > 200)
{
return;
}
m_hasClicked = true;
//探测鼠标点击到的世界坐标和单位.
if (m_overUnit != null)
{
m_hitUnit = m_overUnit;
m_downWorldPos = m_hitUnit.position;
}
else
{
//如果没有点击到单位, 那么就直接赋值在terrain上的世界坐标
m_downWorldPos = m_overWorldPos;
}
m_clickEvent.WorldPosition = m_downWorldPos;
m_dispatcher.DispatchEvent(m_clickEvent);
}
}
/// <summary>
/// 开始cd
/// </summary>
private void ApplyCooldown()
{
m_lastFireTime = CTimeUtil.GetCurrentMillSecondStamp();
}
