public static MeshGroup FromGltf(this glTFMesh x,
Vrm10Storage storage, List <Material> materials)
{
var group = new MeshGroup(x.name);
if (x.primitives.Count == 1)
{
var primitive = x.primitives[0];
var mesh = primitive.FromGltf(storage, x);
var materialIndex = primitive.material;
mesh.Submeshes.Add(
new Submesh(0, mesh.IndexBuffer.Count, materials[materialIndex]));
group.Meshes.Add(mesh);
}
else if (!x.AllPrimitivesHasSameVertexBuffer())
{
int offset = 0;
foreach (var primitive in x.primitives)
{
var mesh = primitive.FromGltf(storage, x);
var materialIndex = primitive.material;
mesh.Submeshes.Add(
new Submesh(offset, mesh.IndexBuffer.Count, materials[materialIndex]));
offset += mesh.IndexBuffer.Count;
group.Meshes.Add(mesh);
}
}
else
{
// for VRM
var mesh = x.SharedBufferFromGltf(storage);
int offset = 0;
foreach (var primitive in x.primitives)
{
var materialIndex = primitive.material;
var count = storage.Gltf.accessors[primitive.indices].count;
mesh.Submeshes.Add(
new Submesh(offset, count, materials[materialIndex]));
offset += count;
}
group.Meshes.Add(mesh);
}
return(group);
}
