protected SkeletonAnimRigNode ProcessNode(Scene scene, Node n)
{
var myRigNode = new SkeletonAnimRigNode
{
Name = n.Name,
LocalTransform = AssMatrixToEmoMatrix(n.Transform),
Children = new SkeletonAnimRigNode[n.ChildCount]
};
for (var i = 0; i < n.MeshCount; i++)
{
int meshIdx = n.MeshIndices[i];
ProcessMesh(scene.Meshes[meshIdx]);
}
for (var i = 0; i < n.Children.Count; i++)
{
Node child = n.Children[i];
SkeletonAnimRigNode childRigNode = ProcessNode(scene, child);
myRigNode.Children[i] = childRigNode;
}
return(myRigNode);
}
protected override void CreateInternal(ReadOnlyMemory <byte> data)
{
var str = new ReadOnlyLinkedMemoryStream();
str.AddMemory(data);
_assContext ??= new AssimpContext();
Scene scene = _assContext.ImportFileFromStream(str,
PostProcessSteps.Triangulate |
PostProcessSteps.FlipUVs |
PostProcessSteps.OptimizeGraph |
PostProcessSteps.OptimizeMeshes);
var embeddedTextures = new List <Texture>();
for (var i = 0; i < scene.TextureCount; i++)
{
EmbeddedTexture assTexture = scene.Textures[i];
var embeddedTexture = new TextureAsset();
embeddedTexture.Create(assTexture.CompressedData);
embeddedTextures.Add(embeddedTexture.Texture);
}
_materials = new List <MeshMaterial>();
for (var i = 0; i < scene.MaterialCount; i++)
{
Material material = scene.Materials[i];
Color4D diffColor = material.ColorDiffuse;
bool embeddedTexture = material.HasTextureDiffuse && embeddedTextures.Count > material.TextureDiffuse.TextureIndex;
var emotionMaterial = new MeshMaterial
{
Name = material.Name,
DiffuseColor = new Color(new Vector4(diffColor.R, diffColor.G, diffColor.B, diffColor.A)),
DiffuseTextureName = embeddedTexture ? $"EmbeddedTexture{material.TextureDiffuse.TextureIndex}" : null,
DiffuseTexture = embeddedTexture ? embeddedTextures[material.TextureDiffuse.TextureIndex] : null
};
_materials.Add(emotionMaterial);
}
_animations = new List <SkeletalAnimation>();
ProcessAnimations(scene);
_meshes = new List <Mesh>();
Node rootNode = scene.RootNode;
SkeletonAnimRigNode animRigRoot = ProcessNode(scene, rootNode);
animRigRoot.LocalTransform *= Matrix4x4.CreateRotationX(-90 * Maths.DEG2_RAD); // Convert to right handed Z is up.
Entity = new MeshEntity
{
Name = Name,
Meshes = _meshes.ToArray(),
Animations = _animations.ToArray(),
AnimationRig = animRigRoot
};
object scaleData = scene.RootNode.Metadata.GetValueOrDefault("UnitScaleFactor").Data;
var scaleF = 1f;
if (scaleData is float f)
{
scaleF = f;
}
Entity.Scale = scaleF;
}
