// Meshを連結する。SingleMesh で使う
public static void Append(this Mesh mesh, VertexBuffer vertices, BufferAccessor indices,
List <Submesh> submeshes,
List <MorphTarget> targets,
int[] jointIndexMap,
int rootIndex = -1,
Matrix4x4 matrix = default(Matrix4x4))
{
var lastCount = mesh.VertexBuffer != null ? mesh.VertexBuffer.Count : 0;
// index buffer
if (mesh.IndexBuffer == null)
{
var accessor = new BufferAccessor(new ArraySegment <byte>(new byte[0]), AccessorValueType.UNSIGNED_INT, indices.AccessorType, 0);
mesh.IndexBuffer = accessor;
mesh.IndexBuffer.Append(indices, 0);
}
else
{
mesh.IndexBuffer.Append(indices, lastCount);
}
{
var submeshOffset = mesh.SubmeshTotalDrawCount;
for (int i = 0; i < submeshes.Count; ++i)
{
var submesh = submeshes[i];
mesh.Submeshes.Add(new Submesh(submeshOffset, submesh.DrawCount, submesh.Material));
submeshOffset += submesh.DrawCount;
}
}
// vertex buffer
var vertexOffset = 0;
if (mesh.VertexBuffer == null)
{
mesh.VertexBuffer = vertices;
}
else
{
vertexOffset = mesh.VertexBuffer.Count;
mesh.VertexBuffer.Append(vertices);
}
if (jointIndexMap != null && mesh.VertexBuffer.Joints != null && mesh.VertexBuffer.Weights != null)
{
// JOINT index 参照の修正
var joints = SpanLike.Wrap <SkinJoints>(mesh.VertexBuffer.Joints.Bytes).Slice(vertexOffset);
var weights = SpanLike.Wrap <Vector4>(mesh.VertexBuffer.Weights.Bytes).Slice(vertexOffset);
FixSkinJoints(joints, weights, jointIndexMap);
}
else
{
var position = SpanLike.Wrap <Vector3>(mesh.VertexBuffer.Positions.Bytes).Slice(vertexOffset);
var normal = SpanLike.Wrap <Vector3>(mesh.VertexBuffer.Normals.Bytes).Slice(vertexOffset);
var joints = mesh.VertexBuffer.GetOrCreateJoints().Slice(vertexOffset);
var weights = mesh.VertexBuffer.GetOrCreateWeights().Slice(vertexOffset);
// Nodeの姿勢を反映して
// JOINT と WEIGHT を追加する
FixNoSkinJoints(joints, weights, rootIndex, position, normal, matrix);
}
// morph target
foreach (var target in targets)
{
if (string.IsNullOrEmpty(target.Name))
{
continue;
}
foreach (var kv in target.VertexBuffer)
{
if (kv.Value.Count != target.VertexBuffer.Count)
{
throw new Exception("different length");
}
}
var found = mesh.MorphTargets.FirstOrDefault(x => x.Name == target.Name);
if (found == null)
{
// targetの前に0を足す
found = new MorphTarget(target.Name);
found.VertexBuffer = target.VertexBuffer.CloneWithOffset(lastCount);
mesh.MorphTargets.Add(found);
foreach (var kv in found.VertexBuffer)
{
if (kv.Value.Count != mesh.VertexBuffer.Count)
{
throw new Exception();
}
}
}
else
{
found.VertexBuffer.Resize(lastCount);
// foundの後ろにtargetを足す
found.VertexBuffer.Append(target.VertexBuffer);
foreach (var kv in found.VertexBuffer)
{
if (kv.Value.Count != mesh.VertexBuffer.Count)
{
throw new Exception();
}
}
}
}
}
private static VrmLib.MeshGroup CreateMesh(UnityEngine.Mesh mesh, Renderer renderer, List <UnityEngine.Material> materials)
{
var meshGroup = new VrmLib.MeshGroup(mesh.name);
var vrmMesh = new VrmLib.Mesh();
vrmMesh.VertexBuffer = new VrmLib.VertexBuffer();
vrmMesh.VertexBuffer.Add(VrmLib.VertexBuffer.PositionKey, ToBufferAccessor(mesh.vertices));
if (mesh.boneWeights.Length == mesh.vertexCount)
{
vrmMesh.VertexBuffer.Add(
VrmLib.VertexBuffer.WeightKey,
ToBufferAccessor(mesh.boneWeights.Select(x =>
new Vector4(x.weight0, x.weight1, x.weight2, x.weight3)).ToArray()
));
vrmMesh.VertexBuffer.Add(
VrmLib.VertexBuffer.JointKey,
ToBufferAccessor(mesh.boneWeights.Select(x =>
new SkinJoints((ushort)x.boneIndex0, (ushort)x.boneIndex1, (ushort)x.boneIndex2, (ushort)x.boneIndex3)).ToArray()
));
}
if (mesh.uv.Length == mesh.vertexCount)
{
vrmMesh.VertexBuffer.Add(VrmLib.VertexBuffer.TexCoordKey, ToBufferAccessor(mesh.uv));
}
if (mesh.normals.Length == mesh.vertexCount)
{
vrmMesh.VertexBuffer.Add(VrmLib.VertexBuffer.NormalKey, ToBufferAccessor(mesh.normals));
}
if (mesh.colors.Length == mesh.vertexCount)
{
vrmMesh.VertexBuffer.Add(VrmLib.VertexBuffer.ColorKey, ToBufferAccessor(mesh.colors));
}
vrmMesh.IndexBuffer = ToBufferAccessor(mesh.triangles);
int offset = 0;
for (int i = 0; i < mesh.subMeshCount; i++)
{
#if UNITY_2019
var subMesh = mesh.GetSubMesh(i);
try
{
vrmMesh.Submeshes.Add(new VrmLib.Submesh(offset, subMesh.indexCount, materials.IndexOf(renderer.sharedMaterials[i])));
}
catch (Exception ex)
{
Debug.LogError(ex);
}
offset += subMesh.indexCount;
#else
var triangles = mesh.GetTriangles(i);
try
{
vrmMesh.Submeshes.Add(new VrmLib.Submesh(offset, triangles.Length, materials.IndexOf(renderer.sharedMaterials[i])));
}
catch (Exception ex)
{
Debug.LogError(ex);
}
offset += triangles.Length;
#endif
}
for (int i = 0; i < mesh.blendShapeCount; i++)
{
var blendShapeVertices = mesh.vertices;
var usePosition = blendShapeVertices != null && blendShapeVertices.Length > 0;
var blendShapeNormals = mesh.normals;
var useNormal = usePosition && blendShapeNormals != null && blendShapeNormals.Length == blendShapeVertices.Length;
// var useNormal = usePosition && blendShapeNormals != null && blendShapeNormals.Length == blendShapeVertices.Length && !exportOnlyBlendShapePosition;
var blendShapeTangents = mesh.tangents.Select(y => (Vector3)y).ToArray();
//var useTangent = usePosition && blendShapeTangents != null && blendShapeTangents.Length == blendShapeVertices.Length;
// var useTangent = false;
var frameCount = mesh.GetBlendShapeFrameCount(i);
mesh.GetBlendShapeFrameVertices(i, frameCount - 1, blendShapeVertices, blendShapeNormals, null);
if (usePosition)
{
var morphTarget = new VrmLib.MorphTarget(mesh.GetBlendShapeName(i));
morphTarget.VertexBuffer = new VrmLib.VertexBuffer();
morphTarget.VertexBuffer.Add(VrmLib.VertexBuffer.PositionKey, ToBufferAccessor(blendShapeVertices));
vrmMesh.MorphTargets.Add(morphTarget);
}
}
meshGroup.Meshes.Add(vrmMesh);
return(meshGroup);
}
