public static string ToJson(this glTFMesh self)
{
var f = new JsonFormatter();
GltfSerializer.Serialize_gltf_meshes_ITEM(f, self);
return(f.ToString());
}
public static SkinningInfo Create(GltfData data, glTFMesh mesh, glTFPrimitives primitives)
{
var hasMorphTarget = HasMorphTarget(mesh);
var positions = data.GLTF.accessors[primitives.attributes.POSITION];
var skinning = new SkinningInfo
{
Joints = primitives.GetJoints(data, positions.count),
Weights = primitives.GetWeights(data, positions.count),
};
if (skinning.Joints != null)
{
// use SkinnedMeshRenderer
return(skinning);
}
else if (!hasMorphTarget)
{
// use MeshRenderer
return(skinning);
}
else
{
// use SkinnedMeshRenderer without boneWeight.
// https://github.com/vrm-c/UniVRM/issues/1675
return(new SkinningInfo
{
ShouldSetRendererNodeAsBone = true,
Joints = _ => (0, 0, 0, 0),
Weights = _ => (1, 0, 0, 0), // assign weight 1
});
static Mesh FromGltf(Vrm10ImportData storage, glTFMesh x, glTFPrimitives primitive, bool isShared)
{
var mesh = new Mesh((TopologyType)primitive.mode)
{
VertexBuffer = primitive.attributes.FromGltf(storage)
};
if (isShared)
{
// create joined index buffer
mesh.IndexBuffer = storage.CreateAccessor(x.primitives.Select(y => y.indices).ToArray());
}
else
{
mesh.IndexBuffer = storage.CreateAccessor(primitive.indices);
}
if (mesh.IndexBuffer == null)
{
var indices = Enumerable.Range(0, mesh.VertexBuffer.Count).ToArray();
var na = storage.Data.NativeArrayManager.CreateNativeArray(indices);
mesh.IndexBuffer = new BufferAccessor(storage.Data.NativeArrayManager, na.Reinterpret <byte>(4), AccessorValueType.UNSIGNED_INT, AccessorVectorType.SCALAR, na.Length);
}
{
gltf_mesh_extras_targetNames.TryGet(x, out List <string> targetNames);
for (int i = 0; i < primitive.targets.Count; ++i)
{
var gltfTarget = primitive.targets[i];
string targetName = null;
{
targetName = targetNames[i];
}
var target = new MorphTarget(targetName)
{
VertexBuffer = gltfTarget.FromGltf(storage)
};
// validate count
foreach (var kv in target.VertexBuffer)
{
if (kv.Value.Count != mesh.VertexBuffer.Count)
{
throw new Exception();
}
}
mesh.MorphTargets.Add(target);
}
}
return(mesh);
}
public static MeshGroup FromGltf(this glTFMesh x, Vrm10ImportData storage)
{
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, 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, materialIndex));
offset += mesh.IndexBuffer.Count;
group.Meshes.Add(mesh);
}
}
else
{
//
// obsolete
//
// 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, materialIndex));
offset += count;
}
group.Meshes.Add(mesh);
}
return(group);
}
public static glTFMesh ExportMeshGroup(this MeshGroup src, List <object> materials, Vrm10Storage storage, ExportArgs option)
{
var mesh = new glTFMesh
{
name = src.Name
};
foreach (var x in src.Meshes)
{
// MeshとSubmeshがGltfのPrimitiveに相当する？
x.ExportMesh(materials, storage, mesh, option);
}
return(mesh);
}
static Mesh FromGltf(Vrm10Storage storage, glTFMesh x, glTFPrimitives primitive, bool isShared)
{
var mesh = new Mesh((TopologyType)primitive.mode)
{
VertexBuffer = primitive.attributes.FromGltf(storage)
};
if (isShared)
{
// create joined index buffer
mesh.IndexBuffer = storage.CreateAccessor(x.primitives.Select(y => y.indices).ToArray());
}
else
{
mesh.IndexBuffer = storage.CreateAccessor(primitive.indices);
}
{
gltf_mesh_extras_targetNames.TryGet(x, out List <string> targetNames);
for (int i = 0; i < primitive.targets.Count; ++i)
{
var gltfTarget = primitive.targets[i];
string targetName = null;
{
targetName = targetNames[i];
}
var target = new MorphTarget(targetName)
{
VertexBuffer = gltfTarget.FromGltf(storage)
};
// validate count
foreach (var kv in target.VertexBuffer)
{
if (kv.Value.Count != mesh.VertexBuffer.Count)
{
throw new Exception();
}
}
mesh.MorphTargets.Add(target);
}
}
return(mesh);
}
public static bool AllPrimitivesHasSameVertexBuffer(this glTFMesh m)
{
if (m.primitives.Count <= 1)
{
return(true);
}
var first = m.primitives[0];
for (int i = 1; i < m.primitives.Count; ++i)
{
if (!first.HasSameVertexBuffer(m.primitives[i]))
{
return(false);
}
}
return(true);
}
/// <summary>
/// ModelExporter.Export で作られた Model.MeshGroups[*] を GLTF 化する
/// </summary>
/// <param name="src"></param>
/// <param name="materials"></param>
/// <param name="storage"></param>
/// <param name="option"></param>
/// <returns></returns>
public static glTFMesh ExportMeshGroup(this MeshGroup src, List <object> materials, Vrm10Storage storage, ExportArgs option)
{
var gltfMesh = new glTFMesh
{
name = src.Name
};
if (src.Meshes.Count != 1)
{
throw new NotImplementedException();
}
foreach (var prim in src.Meshes[0].ExportMeshDivided(materials, storage, option))
{
gltfMesh.primitives.Add(prim);
}
var targetNames = src.Meshes[0].MorphTargets.Select(x => x.Name).ToArray();
gltf_mesh_extras_targetNames.Serialize(gltfMesh, targetNames);
return(gltfMesh);
}
/// <summary>
/// IndexBuffer毎に異なるVertexBufferを参照する
///
/// VertexBuffer
/// +--------+ +--------+ +--------+
/// |0 | |1 | |2 |
/// +--------+ +--------+ +--------+
/// A A A
/// | | |
/// +---------+--------+--------+
/// | submesh0|submesh1|submesh2|
/// +---------+--------+--------+
/// IndexBuffer
/// </summary>
public static Mesh FromGltf(this glTFPrimitives primitive, Vrm10Storage storage, glTFMesh x)
{
return(FromGltf(storage, x, primitive, false));
}
static void ExportMesh(this Mesh mesh, List <object> materials, Vrm10Storage storage, glTFMesh gltfMesh, ExportArgs option)
{
//
// primitive share vertex buffer
//
var attributeAccessorIndexMap = mesh.VertexBuffer
.ToDictionary(
kv => kv.Key,
kv => kv.Value.AddAccessorTo(
storage, 0, option.sparse,
kv.Key == VertexBuffer.PositionKey ? (Action <ArraySegment <byte>, glTFAccessor>)Vec3MinMax : null
)
);
List <Dictionary <string, int> > morphTargetAccessorIndexMapList = null;
if (mesh.MorphTargets.Any())
{
morphTargetAccessorIndexMapList = new List <Dictionary <string, int> >();
foreach (var morphTarget in mesh.MorphTargets)
{
var dict = new Dictionary <string, int>();
foreach (var kv in morphTarget.VertexBuffer)
{
if (option.removeTangent && kv.Key == VertexBuffer.TangentKey)
{
// remove tangent
continue;
}
if (option.removeMorphNormal && kv.Key == VertexBuffer.NormalKey)
{
// normal normal
continue;
}
if (kv.Value.Count != mesh.VertexBuffer.Count)
{
throw new Exception("inavlid data");
}
var accessorIndex = kv.Value.AddAccessorTo(storage, 0,
option.sparse,
kv.Key == VertexBuffer.PositionKey ? (Action <ArraySegment <byte>, glTFAccessor>)Vec3MinMax : null);
dict.Add(kv.Key, accessorIndex);
}
morphTargetAccessorIndexMapList.Add(dict);
}
}
var drawCountOffset = 0;
foreach (var y in mesh.Submeshes)
{
// index
// slide index buffer accessor
var indicesAccessorIndex = ExportIndices(storage, mesh.IndexBuffer, drawCountOffset, y.DrawCount, option);
drawCountOffset += y.DrawCount;
var prim = new glTFPrimitives
{
mode = (int)mesh.Topology,
material = y.Material,
indices = indicesAccessorIndex,
attributes = new glTFAttributes(),
};
gltfMesh.primitives.Add(prim);
// attribute
foreach (var kv in mesh.VertexBuffer)
{
var attributeAccessorIndex = attributeAccessorIndexMap[kv.Key];
switch (kv.Key)
{
case VertexBuffer.PositionKey: prim.attributes.POSITION = attributeAccessorIndex; break;
case VertexBuffer.NormalKey: prim.attributes.NORMAL = attributeAccessorIndex; break;
case VertexBuffer.ColorKey: prim.attributes.COLOR_0 = attributeAccessorIndex; break;
case VertexBuffer.TexCoordKey: prim.attributes.TEXCOORD_0 = attributeAccessorIndex; break;
case VertexBuffer.TexCoordKey2: prim.attributes.TEXCOORD_1 = attributeAccessorIndex; break;
case VertexBuffer.JointKey: prim.attributes.JOINTS_0 = attributeAccessorIndex; break;
case VertexBuffer.WeightKey: prim.attributes.WEIGHTS_0 = attributeAccessorIndex; break;
}
}
// morph target
if (mesh.MorphTargets.Any())
{
foreach (var(t, accessorIndexMap) in
Enumerable.Zip(mesh.MorphTargets, morphTargetAccessorIndexMapList, (t, v) => (t, v)))
{
var target = new gltfMorphTarget();
prim.targets.Add(target);
foreach (var kv in t.VertexBuffer)
{
if (!accessorIndexMap.TryGetValue(kv.Key, out int targetAccessorIndex))
{
continue;
}
switch (kv.Key)
{
case VertexBuffer.PositionKey:
target.POSITION = targetAccessorIndex;
break;
case VertexBuffer.NormalKey:
target.NORMAL = targetAccessorIndex;
break;
case VertexBuffer.TangentKey:
target.TANGENT = targetAccessorIndex;
break;
default:
throw new NotImplementedException();
}
}
}
}
}
// target name
if (mesh.MorphTargets.Any())
{
gltf_mesh_extras_targetNames.Serialize(gltfMesh, mesh.MorphTargets.Select(z => z.Name));
}
}
/// <summary>
/// VertexBufferはひとつでIndexBufferの参照が異なる
///
/// VertexBuffer
/// +----------------------------------+
/// | |
/// +----------------------------------+
/// A A A
/// | | |
/// +---------+--------+--------+
/// | submesh0|submesh1|submesh2|
/// +---------+--------+--------+
/// IndexBuffer
/// </summary>
public static Mesh SharedBufferFromGltf(this glTFMesh x, Vrm10Storage storage)
{
// 先頭を使う
return(FromGltf(storage, x, x.primitives[0], true));
}
/// <summary>
/// IndexBuffer毎に異なるVertexBufferを参照する
///
/// VertexBuffer
/// +--------+ +--------+ +--------+
/// |0 | |1 | |2 |
/// +--------+ +--------+ +--------+
/// A A A
/// | | |
/// +---------+--------+--------+
/// | submesh0|submesh1|submesh2|
/// +---------+--------+--------+
/// IndexBuffer
/// </summary>
static Mesh FromGltf(this glTFPrimitives primitive, Vrm10ImportData storage, glTFMesh x)
{
return(FromGltf(storage, x, primitive, false));
}
