/// <summary>
/// Initializes a new instance of the <see cref="RenderPassSubscription" /> struct.
/// </summary>
/// <param name="layerViewSubset">The ViewRelatedSceneLayerSubset object this subscription belongs to.</param>
/// <param name="renderPass">The render pass on which to register.</param>
/// <param name="sceneObject">The scene object which should be registered.</param>
/// <param name="renderMethod">The render method which is to be registered.</param>
/// <param name="zOrder">The z-order for sorting if the subscriptions of this pass get sorted by it.</param>
internal RenderPassSubscription(
ViewRelatedSceneLayerSubset layerViewSubset, RenderPassInfo renderPass,
SceneObject sceneObject, Action <RenderState> renderMethod,
int zOrder)
{
LayerViewSubset = layerViewSubset;
RenderPass = renderPass;
SceneObject = sceneObject;
RenderMethod = renderMethod;
IsSubscribed = true;
SubscriptionIndex = 0;
ZOrder = zOrder;
}
/// <summary>
/// Subscribes the given object to the given render pass.
/// </summary>
internal RenderPassSubscription SubscribeForPass(
RenderPassInfo passInfo,
SceneObject sceneObject, Action <RenderState> renderMethod,
int zOrder)
{
if (!_isSubscribeUnsubscribeAllowed)
{
throw new SeeingSharpException("Subscription is not allowed currently!");
}
var subscriptionProperties = _objectsPerPassDict[passInfo];
// Append new subscription to subscription list
var subscriptions = subscriptionProperties.Subscriptions;
var subscriptionsCount = subscriptions.Count;
var newSubscription = new RenderPassSubscription(this, passInfo, sceneObject, renderMethod, zOrder);
if (!passInfo.IsSorted)
{
// No sort, so put the new subscription to the end of the collection
newSubscription.SubscriptionIndex = subscriptionsCount;
subscriptions.Add(newSubscription);
}
else
{
// Perform BinaryInsert to the correct position
var newIndex = SeeingSharpUtil.BinaryInsert(subscriptions, newSubscription, SubscriptionZOrderComparer.Instance);
// Increment all subscription indices after the inserted position
subscriptionsCount++;
for (var loop = newIndex; loop < subscriptionsCount; loop++)
{
var actSubscription = subscriptions[loop];
if (actSubscription.SubscriptionIndex != loop)
{
actSubscription.SubscriptionIndex = loop;
subscriptions[loop] = actSubscription;
actSubscription.SceneObject.UpdateSubscription(actSubscription, this);
}
}
newSubscription = subscriptions[newIndex];
}
return(newSubscription);
}
