public static AssetLoadHelper Get(string assetName)
{
if (assetName == null)
{
throw new ArgumentNullException("assetName");
}
if (assetName.Length == 0)
{
throw new ArgumentException("Asset name must not be empty.", "assetName");
}
lock (AssetLoadHelpers)
{
AssetLoadHelper assetLoadHelper;
if (!AssetLoadHelpers.TryGetValue(assetName, out assetLoadHelper))
{
// Create and register new helper.
assetLoadHelper = new AssetLoadHelper(assetName);
AssetLoadHelpers[assetName] = assetLoadHelper;
}
assetLoadHelper.AddReference();
return(assetLoadHelper);
}
}
public FixupWrapper(AssetLoadHelper helper, Action <T> fixup)
{
Debug.Assert(helper != null, "The AssetLoadHelper must not be null.");
Debug.Assert(fixup != null, "The fixup action must not be null.");
_helper = helper;
_fixup = fixup;
}
protected override Mesh Read(ContentReader input, Mesh existingInstance)
{
if (existingInstance == null)
existingInstance = new Mesh();
existingInstance.BoundingShape = input.ReadObject<Shape>();
int numberOfSubmeshes = input.ReadInt32();
for (int i = 0; i < numberOfSubmeshes; i++)
{
// Add submesh to Mesh.Submeshes before loading it. This is necessary
// because the submesh tries to store its material in Mesh.Materials.
Submesh submesh = new Submesh();
existingInstance.Submeshes.Add(submesh);
input.ReadObject(submesh);
}
existingInstance.Name = input.ReadString();
bool hasOccluder = input.ReadBoolean();
if (hasOccluder)
{
using (var helper = AssetLoadHelper.Get(input.AssetName))
{
input.ReadSharedResource(helper.Fixup<Occluder>(o => existingInstance.Occluder = o));
}
}
bool hasSkeleton = input.ReadBoolean();
if (hasSkeleton)
{
using (var helper = AssetLoadHelper.Get(input.AssetName))
{
input.ReadSharedResource(helper.Fixup<Skeleton>(s => existingInstance.Skeleton = s));
}
#else
throw new ContentLoadException("Mesh contains a skeleton, but this build of DigitalRune Graphics does not support animations.");
}
var hasAnimations = input.ReadBoolean();
if (hasAnimations)
{
using (var helper = AssetLoadHelper.Get(input.AssetName))
{
input.ReadSharedResource(helper.Fixup<Dictionary<string, SkeletonKeyFrameAnimation>>(a => existingInstance.Animations = a));
}
#else
throw new ContentLoadException("Mesh contains animations, but this build of DigitalRune Graphics does not support animations.");
}
input.ReadSharedResource<object>(userData => existingInstance.UserData = userData);
return existingInstance;
}
protected override Submesh Read(ContentReader input, Submesh existingInstance)
{
// The submesh is deserialized into an existing instance, where Submesh.Mesh is
// already set!
if (existingInstance == null)
{
throw new ArgumentNullException("existingInstance", "A submesh must be deserialized into an existing instance.");
}
using (var helper = AssetLoadHelper.Get(input.AssetName))
{
input.ReadSharedResource(helper.Fixup <VertexBuffer>(vb => existingInstance.VertexBuffer = vb));
existingInstance.StartVertex = input.ReadInt32();
existingInstance.VertexCount = input.ReadInt32();
input.ReadSharedResource(helper.Fixup <IndexBuffer>(ib => existingInstance.IndexBuffer = ib));
existingInstance.StartIndex = input.ReadInt32();
existingInstance.PrimitiveCount = input.ReadInt32();
int numberOfMorphs = input.ReadInt32();
if (numberOfMorphs > 0)
{
var morphs = new MorphTargetCollection();
for (int i = 0; i < numberOfMorphs; i++)
{
morphs.Add(input.ReadObject <MorphTarget>());
}
existingInstance.MorphTargets = morphs;
}
bool hasSharedMaterial = input.ReadBoolean();
if (hasSharedMaterial)
{
// Load external material, which is shared between models.
existingInstance.SetMaterial(input.ReadExternalReference <Material>());
}
else
{
// Load local material, which is only shared within the model.
input.ReadSharedResource(helper.Fixup <Material>(existingInstance.SetMaterial));
}
// No fixup helper for the UserData because the UserData can be null (see AssetLoadHelper)!
input.ReadSharedResource <object>(userData => existingInstance.UserData = userData);
}
return(existingInstance);
}
protected override MorphTarget Read(ContentReader input, MorphTarget existingInstance)
{
if (existingInstance == null)
{
existingInstance = new MorphTarget();
}
using (var helper = AssetLoadHelper.Get(input.AssetName))
{
existingInstance.Name = input.ReadString();
input.ReadSharedResource(helper.Fixup <VertexBuffer>(vb => existingInstance.VertexBuffer = vb));
existingInstance.StartVertex = input.ReadInt32();
}
return(existingInstance);
}
protected override ModelNode Read(ContentReader input, ModelNode existingInstance)
{
if (existingInstance == null)
{
existingInstance = new ModelNode();
}
// Use AssetLoadHelper to receive an event when the asset (including all
// shared resources) is loaded.
using (var helper = AssetLoadHelper.Get(input.AssetName))
{
input.ReadRawObject <SceneNode>(existingInstance);
helper.AssetLoaded += existingInstance.OnAssetLoaded;
}
return(existingInstance);
}
protected override OccluderNode Read(ContentReader input, OccluderNode existingInstance)
{
if (existingInstance == null)
{
existingInstance = new OccluderNode();
}
// ----- SceneNode properties (base class).
input.ReadRawObject <SceneNode>(existingInstance);
// ----- OccluderNode properties
using (var helper = AssetLoadHelper.Get(input.AssetName))
{
input.ReadSharedResource(helper.Fixup <Occluder>(o => existingInstance.Occluder = o));
}
return(existingInstance);
}
protected override MeshNode Read(ContentReader input, MeshNode existingInstance)
{
if (existingInstance == null)
{
existingInstance = new MeshNode();
}
// Use AssetLoadHelper to receive an event when the asset (including all
// shared resources) is loaded.
using (var helper = AssetLoadHelper.Get(input.AssetName))
{
// ----- SceneNode properties (base class).
input.ReadRawObject <SceneNode>(existingInstance);
// ----- MeshNode properties
input.ReadSharedResource(helper.Fixup <Mesh>(m => existingInstance.Mesh = m));
helper.AssetLoaded += existingInstance.OnAssetLoaded;
}
return(existingInstance);
}
