/// <summary>
/// Initializes a new instance of the <see cref="Scene" /> class.
/// </summary>
public Scene()
{
_perFrameData = new CBPerFrame();
this.TransformMode2D = Graphics2DTransformMode.Custom;
this.CustomTransform2D = Matrix3x2.Identity;
this.VirtualScreenSize2D = new SizeF();
_sceneComponents = new SceneComponentFlyweight(this);
_sceneLayers = new UnsafeList <SceneLayer>();
_sceneLayers.Add(new SceneLayer(DEFAULT_LAYER_NAME, this));
this.Layers = new ReadOnlyCollection <SceneLayer>(_sceneLayers);
_drawing2DLayers = new List <Custom2DDrawingLayer>();
_asyncInvokesBeforeUpdate = new ConcurrentQueue <Action>();
_asyncInvokesUpdateBesideRendering = new ConcurrentQueue <Action>();
_registeredResourceDicts = new IndexBasedDynamicCollection <ResourceDictionary>();
_registeredViews = new IndexBasedDynamicCollection <ViewInformation>();
_renderParameters = new IndexBasedDynamicCollection <SceneRenderParameters>();
this.CachedUpdateState = new SceneRelatedUpdateState();
// Try to initialize this scene object
this.InitializeResourceDictionaries();
}
/// <summary>
/// Performs "update-beside-render" for this layer.
/// </summary>
/// <param name="updateState">Current update state.</param>
internal void UpdateBesideRender(SceneRelatedUpdateState updateState)
{
updateState.SceneLayer = this;
_isInUpdateBeside = true;
try
{
// Now update all view specific references
foreach (var actViewSubset in _viewSubsets)
{
actViewSubset.UpdateBesideRender(updateState, _sceneObjectsForSingleUpdateCall);
}
}
finally
{
updateState.SceneLayer = null;
_isInUpdateBeside = false;
// Some work after whole update processes
_sceneObjectsForSingleUpdateCall.Clear();
}
}
/// <summary>
/// Update logic beside rendering.
/// </summary>
/// <param name="updateState">The update state.</param>
/// <param name="sceneObjectsForSingleUpdateCall">A collection of scene objects for a single update call. These are normally a list of newly inserted static objects.</param>
internal void UpdateBesideRender(SceneRelatedUpdateState updateState, Queue <SceneObject> sceneObjectsForSingleUpdateCall)
{
var filters = this.ViewInformation.FiltersInternal;
_tmpChangedVisibilities.Clear();
// Perform some pre-logic on filters
var anyFilterChanged = false;
foreach (var actFilter in filters)
{
actFilter.SetEnvironmentData(_sceneLayer, this.ViewInformation);
if (actFilter.ConfigurationChangedInternal)
{
anyFilterChanged = true;
}
}
// Check whether we have to update all objects
var refreshAllObjects = this.ViewInformation.Camera.StateChanged || anyFilterChanged;
// Perform filtering for all standard objects
var allObjects = _sceneLayer.ObjectsInternal;
var allObjectsLength = allObjects.Count;
if (allObjectsLength > 0)
{
var allObjectsArray = allObjects.BackingArray;
for (var loop = 0; loop < allObjectsLength; loop++)
{
var actObject = allObjectsArray[loop];
if (actObject == null)
{
continue;
}
// Don't handle static objects here if we don't want to handle them
if (!refreshAllObjects)
{
switch (actObject.VisibilityTestMethod)
{
case VisibilityTestMethod.ByObjectFilters:
if (actObject.IsStatic)
{
continue;
}
if ((!actObject.TransformationChanged) && (!actObject.VisibilityTestMethodChanged))
{
continue;
}
break;
}
}
// Perform culling
this.PerformViewDependentFiltering(actObject, filters);
}
}
// Update objects which are passed for a single update call (normally newly inserted static objects)
var singleUpdateCallCount = sceneObjectsForSingleUpdateCall.Count;
if (!refreshAllObjects && singleUpdateCallCount > 0)
{
var singleUpdateArray = sceneObjectsForSingleUpdateCall.GetBackingArray();
for (var loop = 0; loop < singleUpdateCallCount; loop++)
{
// Perform culling
this.PerformViewDependentFiltering(singleUpdateArray[loop], filters);
}
}
// Handle changed visibility in standard update logic
if (_tmpChangedVisibilities.Count > 0)
{
var startingScene = _scene;
_changedVisibilitiesAction = () =>
{
if (_disposed)
{
return;
}
if (startingScene != _scene)
{
return;
}
foreach (var actChangedVisibility in _tmpChangedVisibilities)
{
// Check whether this object is still here..
if (actChangedVisibility.Item1.Scene != _scene)
{
continue;
}
if (actChangedVisibility.Item1.SceneLayer != _sceneLayer)
{
continue;
}
// Handle changed visibility
this.HandleObjectVisibilityChanged(
actChangedVisibility.Item1,
actChangedVisibility.Item3);
}
};
}
}
/// <summary>
/// Executes view update using the given update state object.
/// </summary>
/// <param name="updateState">The update state.</param>
internal void UpdateForView(SceneRelatedUpdateState updateState)
{
if (_disposed)
{
throw new ObjectDisposedException("ViewRelatedLayerSubset");
}
var anyOrderChanges = false;
var camera = this.ViewInformation.Camera;
_objectsPassTransparentRender.Subscriptions.Sort((left, right) =>
{
var leftSpacial = left.SceneObject as SceneSpacialObject;
var rightSpacial = right.SceneObject as SceneSpacialObject;
if (leftSpacial != null && rightSpacial != null)
{
var leftDistance = (camera.Position - leftSpacial.Position).LengthSquared();
var rightDistance = (camera.Position - rightSpacial.Position).LengthSquared();
anyOrderChanges = true;
return(rightDistance.CompareTo(leftDistance));
}
if (leftSpacial != null)
{
anyOrderChanges = true; return(-1);
}
if (rightSpacial != null)
{
anyOrderChanges = true; return(1);
}
{
return(0);
}
});
if (anyOrderChanges)
{
// Synchronize ordering changes with corresponding scene object
for (var loop = 0; loop < _objectsPassTransparentRender.Subscriptions.Count; loop++)
{
var actSubscription = _objectsPassTransparentRender.Subscriptions[loop];
actSubscription.SubscriptionIndex = loop;
actSubscription.SceneObject.UpdateSubscription(actSubscription, this);
_objectsPassTransparentRender.Subscriptions[loop] = actSubscription;
}
}
// Update all objects related to this view
_isSubscribeUnsubscribeAllowed = true;
try
{
// Update subscriptions based on visibility check result
if (_changedVisibilitiesAction != null)
{
_changedVisibilitiesAction();
_changedVisibilitiesAction = null;
}
// Unsubscribe all invalid objects
while (_invalidObjectsToDeregister.Count > 0)
{
var actInvalidObject = _invalidObjectsToDeregister.Dequeue();
actInvalidObject.UnsubsribeFromAllPasses(this);
}
// Update subscriptions based on object state
var allObjects = _sceneLayer.ObjectsInternal;
var allObjectsLength = allObjects.Count;
_countVisibleObjects = 0;
for (var loop = 0; loop < allObjectsLength; loop++)
{
var actSceneObject = allObjects[loop];
if (_invalidObjects.ContainsKey(actSceneObject))
{
continue;
}
if (actSceneObject.IsLayerViewSubsetRegistered(ViewIndex) &&
actSceneObject.IsVisible(this.ViewInformation))
{
actSceneObject.UpdateForView(updateState, this);
_countVisibleObjects++;
}
}
}
finally
{
_isSubscribeUnsubscribeAllowed = false;
}
// Reorganize subscriptions if there is anything unsubscribed
if (_anythingUnsubscribed)
{
_anythingUnsubscribed = false;
foreach (var actPassProperties in _objectsPerPass)
{
if (actPassProperties.UnsubscribeCallCount <= 0)
{
continue;
}
// Variables for consistency checking
var givenUnsubscribeCount = actPassProperties.UnsubscribeCallCount;
var trueUnsubscribeCount = 0;
// Handle case where we have unsubscribed some
// => Build new subscription list and ignore all with 'IsSubscribed' == false
var newSubscriptionList = actPassProperties.SubscriptionsTemp;
for (var loop = 0; loop < actPassProperties.Subscriptions.Count; loop++)
{
var actSubscription = actPassProperties.Subscriptions[loop];
if (!actSubscription.IsSubscribed)
{
actSubscription.SceneObject.ClearSubscriptionsWithoutUnsubscribeCall(this, actSubscription);
trueUnsubscribeCount++;
continue;
}
// AddObject this item to new subscription list
actSubscription.SubscriptionIndex = newSubscriptionList.Count;
newSubscriptionList.Add(actSubscription);
actSubscription.SceneObject.UpdateSubscription(actSubscription, this);
}
actPassProperties.SubscriptionsTemp = actPassProperties.Subscriptions;
actPassProperties.SubscriptionsTemp.Clear();
actPassProperties.Subscriptions = newSubscriptionList;
actPassProperties.UnsubscribeCallCount = 0;
// Check for consistency: Does unsubscribe-count match true unsubscriptions using IsSubscribed flag
if (givenUnsubscribeCount != trueUnsubscribeCount)
{
throw new SeeingSharpException("Inconsistency: Given unsubscribe count does not mach true count of unsubscriptions!");
}
}
}
}
protected sealed override void UpdateForViewInternal(SceneRelatedUpdateState updateState, ViewRelatedSceneLayerSubset layerViewSubset)
{
// No resources, so nothing to be done
}
protected override void UpdateInternal(SceneRelatedUpdateState updateState)
{
}
internal override void UpdateInternal(SceneRelatedUpdateState updateState, ViewInformation?correspondingView, object?componentContext)
{
this.Update(updateState, correspondingView);
}
/// <summary>
/// This update method gets called on each update pass for each scenes
/// this component is attached to.
/// </summary>
/// <param name="updateState">Current update state.</param>
/// <param name="correspondingView">The view which attached this component (may be null).</param>
protected virtual void Update(SceneRelatedUpdateState updateState, ViewInformation?correspondingView)
{
}
/// <summary>
/// Updates the layer.
/// </summary>
/// <param name="updateState">Current update state.</param>
internal void Update(SceneRelatedUpdateState updateState)
{
updateState.SceneLayer = this;
_isInUpdate = true;
try
{
// Update all objects which are registered for initial update call
var initialUpdateCallCount = _sceneObjectsForSingleUpdateCall.Count;
if (initialUpdateCallCount > 0)
{
var initialUpdateCallItems = _sceneObjectsForSingleUpdateCall.GetBackingArray();
for (var loop = 0; loop < initialUpdateCallCount; loop++)
{
initialUpdateCallItems[loop].Update(updateState);
}
}
// Call default update method for each object
var updateListLength = _sceneObjectsNotStatic.Count;
var updateList = _sceneObjectsNotStatic.BackingArray;
for (var actIndex = 0; actIndex < updateListLength; actIndex++)
{
var actObject = updateList[actIndex];
if (actObject == null)
{
continue;
}
if (!actObject.HasParent)
{
actObject.Update(updateState);
}
}
// Call overall updates on all objects
for (var actIndex = 0; actIndex < updateListLength; actIndex++)
{
var actObject = updateList[actIndex];
if (actObject == null)
{
continue;
}
if (!actObject.HasParent)
{
actObject.UpdateOverall(updateState);
}
}
// Now update all view specific references
foreach (var actViewSubset in _viewSubsets)
{
actViewSubset.UpdateForView(updateState);
}
}
finally
{
updateState.SceneLayer = null;
_isInUpdate = false;
}
}
/// <summary>
/// Internal method for updating all scene components.
/// </summary>
/// <param name="updateState">Current update state.</param>
internal void UpdateSceneComponents(SceneRelatedUpdateState updateState)
{
// Update all components
var attachedComponentsCount = _attachedComponents.Count;
for (var loop = 0; loop < attachedComponentsCount; loop++)
{
_attachedComponents[loop].Component.UpdateInternal(
updateState,
_attachedComponents[loop].CorrespondingView,
_attachedComponents[loop].Context);
}
// Attach all components which are coming in
while (_componentRequests.TryDequeue(out var actRequest))
{
SceneComponentInfo actComponent;
int actComponentIndex;
switch (actRequest.RequestType)
{
case SceneComponentRequestType.Attach:
if (actRequest.Component == null)
{
continue;
}
if (this.TryGetAttachedComponent(
actRequest.Component, actRequest.CorrespondingView,
out actComponent, out actComponentIndex))
{
// We've already attached this component, so skip this request
continue;
}
// Trigger removing of all components with the same group like the new one
// (new components replace old components with same group name)
if (!string.IsNullOrEmpty(actRequest.Component.ComponentGroup))
{
foreach (var actObsoleteComponent in this.GetExistingComponentsByGroup(
actRequest.Component.ComponentGroup,
actRequest.Component.IsViewSpecific ? actRequest.CorrespondingView : null))
{
_componentRequests.Enqueue(new SceneComponentRequest
{
RequestType = SceneComponentRequestType.Detach,
Component = actObsoleteComponent.Component,
CorrespondingView = actObsoleteComponent.CorrespondingView
});
}
}
var actManipulator = new SceneManipulator(_owner);
actManipulator.IsValid = true;
try
{
var newRegisteredComponentInfo = new SceneComponentInfo
{
Component = actRequest.Component,
CorrespondingView = actRequest.CorrespondingView,
Context = actRequest.Component.AttachInternal(
actManipulator, actRequest.CorrespondingView)
};
// Register the component on local list of attached ones
_attachedComponents.Add(newRegisteredComponentInfo);
}
finally
{
actManipulator.IsValid = false;
}
break;
case SceneComponentRequestType.Detach:
if (actRequest.Component == null)
{
continue;
}
if (!this.TryGetAttachedComponent(
actRequest.Component, actRequest.CorrespondingView,
out actComponent, out actComponentIndex))
{
// We don't have any component that is like the requested one
continue;
}
actManipulator = new SceneManipulator(_owner);
actManipulator.IsValid = true;
try
{
actComponent.Component.DetachInternal(
actManipulator, actComponent.CorrespondingView, actComponent.Context);
// RemoveObject the component
_attachedComponents.RemoveAt(actComponentIndex);
}
finally
{
actManipulator.IsValid = false;
}
break;
case SceneComponentRequestType.DetachAll:
while (_attachedComponents.Count > 0)
{
actManipulator = new SceneManipulator(_owner)
{
IsValid = true
};
try
{
actComponent = _attachedComponents[0];
actComponent.Component.DetachInternal(
actManipulator, actComponent.CorrespondingView, actComponent.Context);
// RemoveObject the component
_attachedComponents.RemoveAt(0);
}
finally
{
actManipulator.IsValid = false;
}
}
break;
default:
throw new SeeingSharpException($"Unknown {nameof(SceneComponentRequestType)}: {actRequest.RequestType}");
}
}
}
