private void RaycastUnityUI(PointerData pointer, LayerMask[] prioritizedLayerMasks)
{
Debug.Assert(pointer.End.Point != Vector3.zero, "No pointer source end point found to raycast against!");
Debug.Assert(UIRaycastCamera != null, "You must assign a UIRaycastCamera on the FocusManager before you can process uGUI raycasting.");
RaycastResult uiRaycastResult = default(RaycastResult);
bool overridePhysicsRaycast = false;
RayStep rayStep = default(RayStep);
int rayStepIndex = 0;
// Comment back in GetType() only when debugging for a specific pointer.
Debug.Assert(pointer.PointingSource.Rays != null, "No valid rays for pointer "/* + pointer.GetType()*/);
Debug.Assert(pointer.PointingSource.Rays.Length > 0, "No valid rays for pointer "/* + pointer.GetType()*/);
// Cast rays for every step until we score a hit
for (int i = 0; i < pointer.PointingSource.Rays.Length; i++)
{
if (RaycastUnityUIStep(pointer, pointer.PointingSource.Rays[i], prioritizedLayerMasks, out overridePhysicsRaycast, out uiRaycastResult))
{
rayStepIndex = i;
rayStep = pointer.PointingSource.Rays[i];
break;
}
}
// Check if we need to overwrite the physics raycast info
if ((pointer.End.Object == null || overridePhysicsRaycast) && uiRaycastResult.isValid &&
uiRaycastResult.module != null && uiRaycastResult.module.eventCamera == UIRaycastCamera)
{
newUiRaycastPosition.x = uiRaycastResult.screenPosition.x;
newUiRaycastPosition.y = uiRaycastResult.screenPosition.y;
newUiRaycastPosition.z = uiRaycastResult.distance;
Vector3 worldPos = UIRaycastCamera.ScreenToWorldPoint(newUiRaycastPosition);
var hitInfo = new RaycastHit
{
point = worldPos,
normal = -uiRaycastResult.gameObject.transform.forward
};
pointer.UpdateHit(uiRaycastResult, hitInfo, rayStep, rayStepIndex);
}
}
private bool RaycastPhysicsStep(RayStep step, LayerMask[] prioritizedLayerMasks, out RaycastHit physicsHit)
{
bool isHit = false;
physicsHit = default(RaycastHit);
// If there is only one priority, don't prioritize
if (prioritizedLayerMasks.Length == 1)
{
isHit = Physics.Raycast(step.Origin, step.Direction, out physicsHit, step.Length, prioritizedLayerMasks[0]);
}
else
{
// Raycast across all layers and prioritize
RaycastHit? hit = PrioritizeHits(Physics.RaycastAll(step.Origin, step.Direction, step.Length, Physics.AllLayers), prioritizedLayerMasks);
isHit = hit.HasValue;
if (isHit)
{
physicsHit = hit.Value;
}
}
return isHit;
}