static void InitRoot()
{
GameObject go = new GameObject("UIRoot");
go.layer = LayerMask.NameToLayer("UI");
m_Instance = go.AddComponent <UIRoot>();
go.AddComponent <RectTransform>();
Canvas can = go.AddComponent <Canvas>();
can.renderMode = RenderMode.ScreenSpaceCamera;
can.pixelPerfect = true;
go.AddComponent <GraphicRaycaster>();
m_Instance.root = go.transform;
GameObject camObj = new GameObject("UICamera");
camObj.layer = LayerMask.NameToLayer("UI");
camObj.transform.parent = go.transform;
camObj.transform.localPosition = new Vector3(0, 0, -100f);
Camera cam = camObj.AddComponent <Camera>();
cam.clearFlags = CameraClearFlags.Depth;
cam.orthographic = true;
cam.farClipPlane = 200f;
can.worldCamera = cam;
cam.cullingMask = 1 << 5;
cam.nearClipPlane = -50f;
cam.farClipPlane = 50f;
m_Instance.uiCamera = cam;
//add audio listener
// camObj.AddComponent<AudioListener>();
camObj.AddComponent <CanvasScaler>();
CanvasScaler cs = go.AddComponent <CanvasScaler>();
cs.uiScaleMode = CanvasScaler.ScaleMode.ScaleWithScreenSize;
cs.referenceResolution = new Vector2(1136f, 640f);
cs.screenMatchMode = CanvasScaler.ScreenMatchMode.Expand;
////add auto scale camera fix size.
//TTCameraScaler tcs = go.AddComponent<TTCameraScaler>();
//tcs.scaler = cs;
//set the raycaster
//GraphicRaycaster gr = go.AddComponent<GraphicRaycaster>();
GameObject subRoot;
subRoot = CreateSubCanvasForRoot(go.transform, 0);
subRoot.name = "NormalRoot";
m_Instance.normalRoot = subRoot.transform;
m_Instance.normalRoot.transform.localScale = Vector3.one;
subRoot = CreateSubCanvasForRoot(go.transform, 250);
subRoot.name = "FixedRoot";
m_Instance.fixedRoot = subRoot.transform;
m_Instance.fixedRoot.transform.localScale = Vector3.one;
subRoot = CreateSubCanvasForRoot(go.transform, 500);
subRoot.name = "PopupRoot";
m_Instance.popupRoot = subRoot.transform;
m_Instance.popupRoot.transform.localScale = Vector3.one;
//add Event System
GameObject esObj = GameObject.Find("EventSystem");
if (esObj != null)
{
GameObject.DestroyImmediate(esObj);
}
GameObject eventObj = new GameObject("EventSystem");
eventObj.layer = LayerMask.NameToLayer("UI");
eventObj.transform.SetParent(go.transform);
eventObj.AddComponent <EventSystem>();
eventObj.AddComponent <UnityEngine.EventSystems.StandaloneInputModule>();
}
void OnDestroy()
{
m_Instance = null;
}