private static OutlineItem CreateOutlineItem(SceneNode sceneNode)
{
var item = new OutlineItem
{
Text = $"{sceneNode.GetType().Name} \"{sceneNode.Name}\"",
Icon = MultiColorGlyphs.SceneNode,
Children = new OutlineItemCollection(),
ToolTip = ToolTipSceneNode,
UserData = sceneNode,
};
if (sceneNode is MeshNode)
item.Icon = MultiColorGlyphs.Mesh;
if (sceneNode.Children != null)
foreach (var child in sceneNode.Children)
if (child != null)
item.Children.Add(CreateOutlineItem(child));
var mesh = (sceneNode as MeshNode)?.Mesh;
if (mesh != null)
item.Children.Add(CreateOutlineItem(mesh));
return item;
}
protected virtual void CloneCore(SceneNode source)
{
_flags = source._flags;
Name = source.Name;
ScaleLocal = source.ScaleLocal;
PoseLocal = source.PoseLocal;
LastScaleWorld = source.LastScaleWorld;
LastPoseWorld = source.LastPoseWorld;
Shape = source.Shape; // Shallow copy.
MaxDistance = source.MaxDistance;
SortTag = source.SortTag;
UserData = source.UserData;
// Do not clone: RenderData, SceneData
if (source.Children != null)
{
if (Children == null)
Children = new SceneNodeCollection();
else
Children.Clear();
foreach (var child in source.Children)
Children.Add(child.Clone());
}
}
/// <inheritdoc/>
protected override void CloneCore(SceneNode source)
{
base.CloneCore(source);
var sourceTyped = (ProxyNode)source;
SetNode((sourceTyped.Node != null) ? sourceTyped.Node.Clone() : null);
Shape = sourceTyped.Shape.Clone();
}
// CloneCore() is called to initialize the clone.
protected override void CloneCore(SceneNode source)
{
// Clone the SceneNode properties (base class).
base.CloneCore(source);
// Clone the TextNode properties.
var sourceTextNode = (TextNode)source;
Color = sourceTextNode.Color;
Text = sourceTextNode.Text;
}
/// <summary>
/// Creates an instance of the <see cref="SceneChangedEventArgs"/> class. (This method reuses a
/// previously recycled instance or allocates a new instance if necessary.)
/// </summary>
/// <param name="sceneNode">The scene node.</param>
/// <param name="changes">The changes.</param>
/// <returns>
/// A new or reusable instance of the <see cref="SceneChangedEventArgs"/> class.
/// </returns>
/// <remarks>
/// <para>
/// This method tries to obtain a previously recycled instance from a resource pool if resource
/// pooling is enabled (see <see cref="ResourcePool.Enabled">ResourcePool.Enabled</see>). If no
/// object is available, a new instance is automatically allocated on the heap.
/// </para>
/// <para>
/// The owner of the object should call <see cref="Recycle"/> when the instance is no longer
/// needed.
/// </para>
/// </remarks>
/// <exception cref="ArgumentNullException">
/// <paramref name="sceneNode"/> is <see langword="null"/>.
/// </exception>
public static SceneChangedEventArgs Create(SceneNode sceneNode, SceneChanges changes)
{
if (sceneNode == null)
throw new ArgumentNullException("sceneNode");
var args = Pool.Obtain();
args.SceneNode = sceneNode;
args.Changes = changes;
return args;
}
private void AddSubtree(SceneNode node)
{
if (node.IsEnabled)
{
AddNode(node);
if (node.Children != null)
foreach (var childNode in node.Children)
AddSubtree(childNode);
}
}
private void AddNode(SceneNode node)
{
var proxyNode = node as ProxyNode;
if (proxyNode != null)
{
if (proxyNode.Node != null)
AddSubtree(proxyNode.Node);
}
else
{
SceneNodes.Add(node);
}
}
public void Set(SceneNode referenceNode, IList<SceneNode> nodes, RenderContext context)
{
Reset();
ReferenceNode = referenceNode;
int numberOfNodes = nodes.Count;
for (int i = 0; i < numberOfNodes; i++)
{
var node = nodes[i];
Debug.Assert(node.ActualIsEnabled, "Scene query contains disabled nodes.");
SceneNodes.Add(node);
}
}
public void Set(SceneNode referenceNode, IList<SceneNode> nodes)
{
Reset();
ReferenceNode = referenceNode;
for (int i = 0; i < nodes.Count; i++)
{
var node = nodes[i];
if (node.IsRenderable)
{
RenderableNodes.Add(node);
}
}
}
public void Set(SceneNode referenceNode, IList<SceneNode> nodes, RenderContext context)
{
Reset();
ReferenceNode = referenceNode;
int numberOfNodes = nodes.Count;
for (int i = 0; i < numberOfNodes; i++)
{
var node = nodes[i];
if ((WboitFlags)node.UserFlags == WboitFlags.Transparent)
TransparentNodes.Add(node);
else
SceneNodes.Add(node);
}
}
public void Set(SceneNode referenceNode, IList<SceneNode> nodes, RenderContext context)
{
Reset();
ReferenceNode = referenceNode;
int numberOfNodes = nodes.Count;
for (int i = 0; i < numberOfNodes; i++)
{
var fogNode = nodes[i] as FogNode;
if (fogNode != null)
{
Debug.Assert(fogNode.ActualIsEnabled, "Scene query contains disabled nodes.");
FogNodes.Add(fogNode);
}
}
// Sort fog nodes.
FogNodes.Sort(DescendingFogNodeComparer.Instance);
}
public void Set(SceneNode referenceNode, IList<SceneNode> nodes, RenderContext context)
{
Reset();
ReferenceNode = referenceNode;
for (int i = 0; i < nodes.Count; i++)
{
#if !XBOX360
if (nodes[i] is TerrainNode)
TerrainNodes.Add(nodes[i]);
#endif
if (nodes[i] is CloudLayerNode)
CloudLayerNodes.Add(nodes[i]);
else if (nodes[i] is WaterNode)
WaterNodes.Add(nodes[i]);
else if (nodes[i] is SceneCaptureNode)
SceneCaptureNodes.Add(nodes[i]);
else if (nodes[i] is PlanarReflectionNode)
PlanarReflectionNodes.Add(nodes[i]);
}
}
//--------------------------------------------------------------
/// <inheritdoc/>
public override bool CanRender(SceneNode node, RenderContext context)
{
return node is PlanarReflectionNode;
}
// OnLoad() is called when the GameObject is added to the IGameObjectService.
protected override void OnLoad()
{
var particleSystemService = _services.GetInstance<IParticleSystemService>();
// The campfire consists of two particle systems (fire + smoke) and a light source.
//
// _campfire (SceneNode)
// |
// +-- _fireParticles (ParticleSystemNode)
// |
// +-- _smokeParticles (ParticleSystemNode)
// |
// +-- _light (LightNode)
// Use a basic scene node as the root node for the campfire.
_campfire = new SceneNode
{
Name = "Campfire",
PoseLocal = new Pose(new Vector3F(0, 0, -1)),
Children = new SceneNodeCollection()
};
// Add fire particles.
var contentManager = _services.GetInstance<ContentManager>();
var particleSystem = CreateFire(contentManager);
particleSystemService.ParticleSystems.Add(particleSystem);
_fireParticles = new ParticleSystemNode(particleSystem)
{
// The fire effect lies in the xy plane and shoots into the forward direction (= -z axis).
// Therefore we rotate the particle system to shoot upwards.
PoseLocal = new Pose(new Vector3F(0, 0.2f, 0), Matrix33F.CreateRotationX(ConstantsF.PiOver2))
};
_campfire.Children.Add(_fireParticles);
// Add smoke particles.
particleSystem = CreateSmoke(contentManager);
particleSystemService.ParticleSystems.Add(particleSystem);
_smokeParticles = new ParticleSystemNode(particleSystem)
{
PoseLocal = new Pose(new Vector3F(0, 0.2f, 0), Matrix33F.CreateRotationX(ConstantsF.PiOver2))
};
_campfire.Children.Add(_smokeParticles);
// Add a point light that illuminates the environment.
var light = new PointLight
{
Attenuation = 0.1f,
Color = new Vector3F(1, 0.2f, 0),
HdrScale = 20,
Range = 4
};
_light = new LightNode(light)
{
// Optional: We can make this light cast shadows - but this will cost performance!
//Shadow = new CubeMapShadow { PreferredSize = 64, FilterRadius = 2, JitterResolution = 2048 },
PoseLocal = new Pose(new Vector3F(0, 1f, 0))
};
_campfire.Children.Add(_light);
// Add campfire to scene.
var scene = _services.GetInstance<IScene>();
scene.Children.Add(_campfire);
// Particle effects can be added multiple times to the scene (= "instancing").
// Uncomment the following lines to add a few more instance to the scene.
//for (int i = 0; i < 10; i++)
//{
// var clone = _campfire.Clone();
// // Set random scale, position, orientation.
// clone.ScaleLocal = _random.NextVector3F(0.5f, 1.5f);
// var pose = _campfire.PoseWorld;
// pose.Position.X += _random.NextFloat(-10, 10);
// pose.Position.Z += _random.NextFloat(-10, 10);
// pose.Orientation = Matrix33F.CreateRotationY(_random.NextFloat(-ConstantsF.PiOver2, ConstantsF.PiOver2));
// clone.PoseLocal = pose;
// scene.Children.Add(clone);
//}
// Add GUI controls to the Options window.
var sampleFramework = _services.GetInstance<SampleFramework>();
var optionsPanel = sampleFramework.AddOptions("Game Objects");
var panel = SampleHelper.AddGroupBox(optionsPanel, "CampfireObject");
SampleHelper.AddCheckBox(
panel,
"Enable campfire",
IsEnabled,
isChecked => IsEnabled = isChecked);
}
// OnUnload() is called when the GameObject is removed from the IGameObjectService.
protected override void OnUnload()
{
// Clean up.
_campfire.Parent.Children.Remove(_campfire);
_campfire.Dispose(false);
_campfire = null;
_fireParticles = null;
_smokeParticles = null;
_light = null;
_random = null;
}
/// <inheritdoc/>
protected override void CloneCore(SceneNode source)
{
// Clone the SceneNode properties (base class).
base.CloneCore(source);
// Clone the TerrainNode properties.
var sourceTyped = (TerrainNode)source;
HoleThreshold = sourceTyped.HoleThreshold;
}
public void Set(SceneNode referenceNode, IList<SceneNode> nodes, RenderContext context)
{
ReferenceNode = referenceNode;
ShadowCasters.Clear();
// Check if the light is the directional light. If yes, we will check the
// IsShadowCasterCulled flag.
var lightNode = referenceNode as LightNode;
if (lightNode == null)
lightNode = context.ReferenceNode as LightNode;
_checkShadowCusterCulling = (lightNode != null) && (lightNode.Light is DirectionalLight);
int numberOfNodes = nodes.Count;
#if DEBUG
for (int i = 0; i < numberOfNodes; i++)
Debug.Assert(nodes[i].ActualIsEnabled, "Scene query contains disabled nodes.");
#endif
if (context.LodCameraNode == null)
{
// ----- No LOD
for (int i = 0; i < numberOfNodes; i++)
{
var node = nodes[i];
if (IsShadowCaster(node))
ShadowCasters.Add(node);
}
}
else
{
// ----- LOD
// Get values for LOD computations.
var cameraNode = context.LodCameraNode;
_cameraPosition = cameraNode.PoseLocal.Position;
_lodBiasOverYScale = 1 / Math.Abs(cameraNode.Camera.Projection.ToMatrix44F().M11)
* cameraNode.LodBias * context.LodBias;
// Add nodes and evaluate LOD groups.
for (int i = 0; i < numberOfNodes; i++)
AddNodeWithLod(nodes[i], context);
}
}
// CanRender() checks whether a given scene node can be rendered with this
// scene node renderer.
public override bool CanRender(SceneNode node, RenderContext context)
{
return node is TextNode;
}
private void AddSubtree(SceneNode node, RenderContext context)
{
if (node.IsEnabled)
{
AddNodeWithLod(node, context);
if (node.Children != null)
foreach (var childNode in node.Children)
AddSubtree(childNode, context);
}
}
// Sets the node without updating the bounding shape.
private void SetNode(SceneNode node)
{
// Detach proxy.
if (_node != null)
{
SetProxy(_node, null);
_node.SceneChanged -= OnNodeSceneChanged;
_node.PoseLocal = Pose.Identity;
_node.ScaleLocal = Vector3F.One;
}
_node = node;
// Attach proxy.
if (_node != null)
{
SetProxy(_node, this);
_node.PoseLocal = PoseWorld;
_node.ScaleLocal = ScaleWorld;
_node.SceneChanged += OnNodeSceneChanged;
}
}
/// <summary>
/// Sets the <see cref="SceneNode.Proxy"/> in all referenced nodes.
/// </summary>
/// <param name="referencedNode">The referenced node.</param>
/// <param name="proxyNode">The proxy node.</param>
private static void SetProxy(SceneNode referencedNode, SceneNode proxyNode)
{
Debug.Assert(referencedNode != null, "node must not be null.");
referencedNode.Proxy = proxyNode;
if (referencedNode.Children != null)
foreach (var childNode in referencedNode.Children)
SetProxy(childNode, proxyNode);
}
//--------------------------------------------------------------
#region Creation & Cleanup
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="ProxyNode"/> class.
/// </summary>
/// <param name="node">The scene node.</param>
public ProxyNode(SceneNode node)
{
IsRenderable = true;
CastsShadows = true;
Node = node;
}
/// <summary>
/// Called when <see cref="Parent"/> was changed.
/// </summary>
/// <param name="oldParent">The old parent.</param>
/// <param name="newParent">The new parent.</param>
protected virtual void OnParentChanged(SceneNode oldParent, SceneNode newParent)
{
}
/// <inheritdoc />
protected override void CloneCore(SceneNode source)
{
// Clone SceneNode properties.
base.CloneCore(source);
// Clone FogSphereNode properties.
var sourceTyped = (FogSphereNode)source;
Color = sourceTyped.Color;
Density = sourceTyped.Density;
BlendMode = sourceTyped.BlendMode;
Falloff = sourceTyped.Falloff;
IntersectionSoftness = sourceTyped.IntersectionSoftness;
}
//--------------------------------------------------------------
/// <inheritdoc/>
public void Reset()
{
ReferenceNode = null;
FogNodes.Clear();
}
/// <inheritdoc/>
protected override void CloneCore(SceneNode source)
{
// Clone SceneNode properties.
base.CloneCore(source);
// Clone FigureNode properties.
var sourceTyped = (FigureNode)source;
StrokeColor = sourceTyped.StrokeColor;
StrokeAlpha = sourceTyped.StrokeAlpha;
StrokeThickness = sourceTyped.StrokeThickness;
StrokeDashPattern = sourceTyped.StrokeDashPattern;
DashInWorldSpace = sourceTyped.DashInWorldSpace;
FillColor = sourceTyped.FillColor;
FillAlpha = sourceTyped.FillAlpha;
DrawOrder = sourceTyped.DrawOrder;
}
private void AddNodeWithLod(SceneNode node, RenderContext context)
{
if (!IsShadowCaster(node))
return;
bool hasMaxDistance = Numeric.IsPositiveFinite(node.MaxDistance);
var lodGroupNode = node as LodGroupNode;
bool isLodGroupNode = (lodGroupNode != null);
float distance = 0;
if (hasMaxDistance || isLodGroupNode)
{
Debug.Assert(
node.ScaleWorld.X > 0 && node.ScaleWorld.Y > 0 && node.ScaleWorld.Z > 0,
"Assuming that all scale factors are positive.");
// Determine view-normalized distance between scene node and camera node.
distance = (node.PoseWorld.Position - _cameraPosition).Length;
distance *= _lodBiasOverYScale;
distance /= node.ScaleWorld.LargestComponent;
}
// Distance Culling: Only handle nodes that are within MaxDistance.
if (hasMaxDistance && distance >= node.MaxDistance)
return; // Ignore scene node.
if (isLodGroupNode)
{
// Evaluate LOD group.
var lodSelection = lodGroupNode.SelectLod(context, distance);
AddSubtree(lodSelection.Current, context);
}
else
{
ShadowCasters.Add(node);
}
}
// TODO(matt) - grid creation needs to be able to be customized and should also be to a specific scale
// TODO(matt) - should also have an intuitive control panel with presets and real time feedback
// Add a grid with thick major grid lines and thin stroked minor grid lines.
private void CreateGrid()
{
var majorGridLines = new PathFigure2F();
for (int i = 0; i <= 100; i++)
{
majorGridLines.Segments.Add(new LineSegment2F
{
Point1 = new Vector2F(-50, -50 + i),
Point2 = new Vector2F(50, -50 + i),
});
majorGridLines.Segments.Add(new LineSegment2F
{
Point1 = new Vector2F(-50 + i, -50),
Point2 = new Vector2F(-50 + i, 50),
});
}
var minorGridLines = new PathFigure2F();
for (int i = 0; i < 100; i++)
{
minorGridLines.Segments.Add(new LineSegment2F
{
Point1 = new Vector2F(-50, -40.5f + i),
Point2 = new Vector2F(50, -40.5f + i),
});
minorGridLines.Segments.Add(new LineSegment2F
{
Point1 = new Vector2F(-40.5f + i, -50),
Point2 = new Vector2F(-40.5f + i, 50),
});
}
var majorLinesNode = new FigureNode(majorGridLines)
{
Name = "Major grid lines",
PoseLocal = Pose.Identity,
StrokeThickness = 1,
StrokeColor = new Vector3F(0.1f),
StrokeAlpha = 1f,
};
var minorLinesNode = new FigureNode(minorGridLines)
{
Name = "Minor grid lines",
PoseLocal = Pose.Identity,
StrokeThickness = 0.5f,
StrokeColor = new Vector3F(0.1f),
StrokeAlpha = 1f,
//DashInWorldSpace = true,
//StrokeDashPattern = new Vector4F(10, 4, 0, 0) / 200,
};
var gridNode = new SceneNode
{
Name = "Grid",
Children = new SceneNodeCollection(),
PoseLocal = new Pose(new Vector3F(0, -0.5f, 0)),
};
gridNode.Children.Add(majorLinesNode);
gridNode.Children.Add(minorLinesNode);
Scene.Children.Add(gridNode);
}
private bool IsShadowCaster(SceneNode node)
{
if (_checkShadowCusterCulling)
{
// Flag CastsShadow must be set.
// Flag IsShadowCasterCulled must NOT be set.
return node.GetFlags(SceneNodeFlags.CastsShadows | SceneNodeFlags.IsShadowCasterCulled)
== SceneNodeFlags.CastsShadows;
}
else
{
#if !WINDOWS_PHONE && !XBOX360
return node.GetFlag(SceneNodeFlags.CastsShadows)
&& !(node is TerrainNode); // Terrain node is only rendered into directional light shadow.
#else
return node.GetFlag(SceneNodeFlags.CastsShadows);
#endif
}
}
//--------------------------------------------------------------
/// <inheritdoc/>
public override bool CanRender(SceneNode node, RenderContext context)
{
var lightNode = node as LightNode;
return lightNode != null && lightNode.Shadow is CubeMapShadow;
}
//--------------------------------------------------------------
/// <inheritdoc/>
public override bool CanRender(SceneNode node, RenderContext context)
{
return (node is SkyNode) && base.CanRender(node, context);
}