protected virtual void RemoveCanvas()
{
Canvas canvas = GetComponent <Canvas>();
if (canvas == null)
{
return;
}
GraphicRaycaster defaultRaycaster = canvas.gameObject.GetComponent <GraphicRaycaster>();
VRTK4_UIGraphicRaycaster customRaycaster = canvas.gameObject.GetComponent <VRTK4_UIGraphicRaycaster>();
//if a custom raycaster exists then remove it
if (customRaycaster != null)
{
Destroy(customRaycaster);
}
//If the default raycaster is disabled, then re-enable it
if (defaultRaycaster != null && !defaultRaycaster.enabled)
{
defaultRaycaster.enabled = true;
}
//Check if there is a collider and remove it if there is
if (canvasBoxCollider != null)
{
Destroy(canvasBoxCollider);
}
if (canvasRigidBody != null)
{
Destroy(canvasRigidBody);
}
if (draggablePanelCreation != null)
{
StopCoroutine(draggablePanelCreation);
}
Transform draggablePanel = canvas.transform.Find(CANVAS_DRAGGABLE_PANEL);
if (draggablePanel != null)
{
Destroy(draggablePanel.gameObject);
}
Transform frontTrigger = canvas.transform.Find(ACTIVATOR_FRONT_TRIGGER_GAMEOBJECT);
if (frontTrigger != null)
{
Destroy(frontTrigger.gameObject);
}
}
/// <summary>
/// Sanity Check for Graphic Raycaster
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
protected virtual bool ValidElement(GameObject obj)
{
bool isValid = false;
if (obj.layer != LayerMask.NameToLayer("UI"))
{
var anyHandler = obj.GetComponentInParent <IEventSystemHandler>();
if (anyHandler != null)
{
isValid = true;
}
}
VRTK4_UIGraphicRaycaster canvasCheck = obj.GetComponentInParent <VRTK4_UIGraphicRaycaster>();
return(isValid || canvasCheck != null && canvasCheck.enabled);
}
protected virtual void SetupCanvas()
{
if (this == null || !isActiveAndEnabled || VRTK4_EventSystem.Instance == null)
{
return;
}
Canvas canvas = GetComponent <Canvas>();
if (canvas == null || canvas.renderMode != RenderMode.WorldSpace)
{
Debug.LogError(
string.Format("{0} REQUIRED_COMPONENT_MISSING_FROM_GAMEOBJECT {1} Make sure {2}",
nameof(VRTK4_UICanvas), gameObject.name, "that Canvas is set to `Render Mode = World Space`"),
gameObject);
return;
}
RectTransform canvasRectTransform = canvas.GetComponent <RectTransform>();
Vector2 canvasSize = canvasRectTransform.sizeDelta;
//copy public params then disable existing graphic raycaster
GraphicRaycaster defaultRaycaster = canvas.gameObject.GetComponent <GraphicRaycaster>();
VRTK4_UIGraphicRaycaster customRaycaster =
canvas.gameObject.GetComponent <VRTK4_UIGraphicRaycaster>();
//if it doesn't already exist, add the custom raycaster
if (customRaycaster == null)
{
customRaycaster = canvas.gameObject.AddComponent <VRTK4_UIGraphicRaycaster>();
}
if (defaultRaycaster != null && defaultRaycaster.enabled)
{
customRaycaster.ignoreReversedGraphics = defaultRaycaster.ignoreReversedGraphics;
customRaycaster.blockingObjects = defaultRaycaster.blockingObjects;
//Use Reflection to transfer the BlockingMask
customRaycaster.GetType()
.GetField("m_BlockingMask",
BindingFlags.Instance | BindingFlags.NonPublic).SetValue(
customRaycaster,
defaultRaycaster.GetType()
.GetField("m_BlockingMask", BindingFlags.Instance | BindingFlags.NonPublic)
.GetValue(defaultRaycaster));
defaultRaycaster.enabled = false;
}
//add a box collider and background image to ensure the rays always hit
if (canvas.gameObject.GetComponent <BoxCollider>() == null)
{
Vector2 pivot = canvasRectTransform.pivot;
float zSize = 0.1f;
float zScale = canvasRectTransform.localScale.z > 0 ? zSize / canvasRectTransform.localScale.z : 1;
canvasBoxCollider = canvas.gameObject.AddComponent <BoxCollider>();
canvasBoxCollider.size = new Vector3(canvasSize.x, canvasSize.y, zScale);
canvasBoxCollider.center = new Vector3(canvasSize.x / 2 - canvasSize.x * pivot.x,
canvasSize.y / 2 - canvasSize.y * pivot.y, zScale / 2f);
canvasBoxCollider.isTrigger = true;
canvasBoxCollider.gameObject.layer = UnityEngine.LayerMask.NameToLayer("UI");
}
if (canvas.gameObject.GetComponent <Rigidbody>() == null)
{
canvasRigidBody = canvas.gameObject.AddComponent <Rigidbody>();
canvasRigidBody.isKinematic = true;
}
draggablePanelCreation = StartCoroutine(CreateDraggablePanel(canvas, canvasSize));
CreateActivator(canvas, canvasSize);
}