public void TestChangingSceneGraphForEntity()
{
var entity = new MockEntity(0);
entity.Initialize();
var root1 = new SceneGraphRoot();
var root2 = new SceneGraphRoot();
root1.AddAsync(entity);
entity.Parent.Should().Be(root1);
new Action(() => root1.AddAsync(entity)).Should().Throw <NotSupportedException>();
root1.RemoveAsync(entity);
entity.Parent.Should().Be(root1, "because RemoveScheduled will only be called in the next update");
root1.Update(new GameTime());
entity.Parent.Should().BeNull("because update now removed the entity from the scene");
root2.AddAsync(entity);
entity.Parent.Should().Be(root2);
root1.IsRegistered(entity).Should().BeFalse("because it will only be registered in the update call");
new Action(() => entity.ChangeParent(root1)).Should().Throw <NotSupportedException>();
// call update so entity is actually registered with the root2
root2.Update(new GameTime());
// only now is the alternative method possible
entity.ChangeParent(root1);
entity.Parent.Should().Be(root1);
}
public void ChildParentRelationBetweenEntityAndGraphShouldExist()
{
var root = new SceneGraphRoot();
root.Parent.Should().BeNull();
var node = new MockEntity(0);
node.Parent.Should().BeNull();
node.Initialize();
node.Initialized.Should().BeTrue();
root.AddAsync(node);
node.Parent.Should().Be(root, "because add scheduled added the node right away as it was already initialized");
const int sleep = 1000;
var lazyNode = new MockEntity(sleep);
lazyNode.Initialized.Should().BeFalse();
var before = DateTime.Now;
root.AddAsync(lazyNode);
lazyNode.Initialized.Should().BeFalse();
lazyNode.Parent.Should().Be(root);
// wait longer than init would take
while (DateTime.Now < before + TimeSpan.FromMilliseconds(sleep + 1000))
{
Thread.Sleep(10);
}
// assert that it was infact executed
lazyNode.Initialized.Should().BeTrue();
}
public void TestSceneGraphNesting()
{
var root1 = new SceneGraphRoot();
var root2 = new SceneGraphRoot();
root1.Initialize();
root2.Initialize();
root1.AddAsync(root2);
root2.Parent.Should().Be(root1);
}
/// <summary>
/// When called will add a temporary loading scene to the <see cref="SceneGraphRoot"/>.
/// The progress scene will automatically update remove itself when the Initialize function of the scene is finished.
/// </summary>
/// <param name="root"></param>
/// <param name="scene">The actual scene that has heavy loading in its Initialize function.</param>
/// <param name="renderContext"></param>
public static void AddAsyncWithLoadingScreen <TScene>(this SceneGraphRoot root, TScene scene, IRenderContext renderContext) where TScene : SceneGraphEntity, ISceneGraphEntityInitializeProgressReporter
{
var progressScene = new LoadingProgressScene(renderContext);
EventHandler <int> func = null;
func = (s, p) =>
{
progressScene.SetProgress(p);
// remove once completed
if (p == 100)
{
scene.InitializeProgress -= func;
}
};
scene.InitializeProgress += func;
// add the progress reporter which is listening in
root.AddAsync(progressScene);
root.AddAsync(scene);
}