//[Pure]
protected virtual void Raycast(Canvas canvas, Camera eventCamera, PointerEventData eventData, Ray ray, ref List <RaycastResult> results)
{
float hitDistance = GetHitDistance(ray, VRTK_UIPointer.GetPointerLength(eventData.pointerId));
IList <Graphic> canvasGraphics = GraphicRegistry.GetGraphicsForCanvas(canvas);
for (int i = 0; i < canvasGraphics.Count; ++i)
{
Graphic graphic = canvasGraphics[i];
if (graphic.depth == -1 || !graphic.raycastTarget)
{
continue;
}
Transform graphicTransform = graphic.transform;
Vector3 graphicForward = graphicTransform.forward;
float distance = Vector3.Dot(graphicForward, graphicTransform.position - ray.origin) / Vector3.Dot(graphicForward, ray.direction);
if (distance < 0)
{
continue;
}
//Prevents "flickering hover" on items near canvas center.
if ((distance - UI_CONTROL_OFFSET) > hitDistance)
{
continue;
}
Vector3 position = ray.GetPoint(distance);
Vector2 pointerPosition = eventCamera.WorldToScreenPoint(position);
if (!RectTransformUtility.RectangleContainsScreenPoint(graphic.rectTransform, pointerPosition, eventCamera))
{
continue;
}
if (graphic.Raycast(pointerPosition, eventCamera))
{
RaycastResult result = new RaycastResult()
{
gameObject = graphic.gameObject,
module = this,
distance = distance,
screenPosition = pointerPosition,
worldPosition = position,
depth = graphic.depth,
sortingLayer = canvas.sortingLayerID,
sortingOrder = canvas.sortingOrder,
};
VRTK_SharedMethods.AddListValue(results, result);
}
}
results.Sort((g1, g2) => g2.depth.CompareTo(g1.depth));
}
