public static void LoadMesh(this Mesh mesh, VrmLib.Mesh src, VrmLib.Skin skin = null)
{
mesh.vertices = src.VertexBuffer.Positions.GetSpan <Vector3>().ToArray();
mesh.normals = src.VertexBuffer.Normals?.GetSpan <Vector3>().ToArray();
mesh.uv = src.VertexBuffer.TexCoords?.GetSpan <Vector2>().ToArray();
mesh.colors = src.VertexBuffer.Colors?.GetSpan <Color>().ToArray();
if (src.VertexBuffer.Weights != null && src.VertexBuffer.Joints != null)
{
var boneWeights = new BoneWeight[mesh.vertexCount];
if (src.VertexBuffer.Weights.Count != mesh.vertexCount || src.VertexBuffer.Joints.Count != mesh.vertexCount)
{
throw new ArgumentException();
}
var weights = src.VertexBuffer.Weights.GetSpan <Vector4>();
var joints = src.VertexBuffer.Joints.GetSpan <VrmLib.SkinJoints>();
if (skin != null)
{
mesh.bindposes = skin.InverseMatrices.GetSpan <Matrix4x4>().ToArray();
}
for (int i = 0; i < weights.Length; ++i)
{
var w = weights[i];
boneWeights[i].weight0 = w.x;
boneWeights[i].weight1 = w.y;
boneWeights[i].weight2 = w.z;
boneWeights[i].weight3 = w.w;
}
for (int i = 0; i < joints.Length; ++i)
{
var j = joints[i];
boneWeights[i].boneIndex0 = j.Joint0;
boneWeights[i].boneIndex1 = j.Joint1;
boneWeights[i].boneIndex2 = j.Joint2;
boneWeights[i].boneIndex3 = j.Joint3;
}
mesh.boneWeights = boneWeights;
}
mesh.subMeshCount = src.Submeshes.Count;
#if UNITY_2019
var triangles = src.IndexBuffer.GetAsIntArray();
mesh.triangles = triangles;
var flags = MeshUpdateFlags.DontRecalculateBounds | MeshUpdateFlags.DontResetBoneBounds;
for (int i = 0; i < src.Submeshes.Count; ++i)
{
var submesh = src.Submeshes[i];
mesh.SetSubMesh(i, new SubMeshDescriptor
{
indexStart = submesh.Offset,
indexCount = submesh.DrawCount,
},
flags);
}
#else
var triangles = src.IndexBuffer.GetAsIntList();
for (int i = 0; i < src.Submeshes.Count; ++i)
{
var submesh = src.Submeshes[i];
mesh.SetTriangles(triangles.GetRange(submesh.Offset, submesh.DrawCount), i);
}
#endif
foreach (var morphTarget in src.MorphTargets)
{
var positions =
morphTarget.VertexBuffer.Positions != null
? morphTarget.VertexBuffer.Positions.GetSpan <Vector3>().ToArray()
: new Vector3[mesh.vertexCount] // dummy
;
mesh.AddBlendShapeFrame(morphTarget.Name, 100.0f, positions, null, null);
mesh.RecalculateBounds();
mesh.RecalculateTangents();
}
}
private static VrmLib.MeshGroup CreateMesh(Mesh mesh, Renderer renderer, Dictionary <Material, VrmLib.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 VrmLib.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++)
{
var subMesh = mesh.GetSubMesh(i);
try
{
vrmMesh.Submeshes.Add(new VrmLib.Submesh(offset, subMesh.indexCount, materials[renderer.sharedMaterials[i]]));
}
catch (Exception ex)
{
Debug.LogError(ex);
}
offset += subMesh.indexCount;
}
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);
}
/// <summary>
/// VrmLib.Mesh => UnityEngine.Mesh
/// </summary>
/// <param name="mesh"></param>
/// <param name="src"></param>
/// <param name="skin"></param>
public static UnityEngine.Mesh LoadSharedMesh(VrmLib.Mesh src, VrmLib.Skin skin = null)
{
// submesh 方式
var mesh = new UnityEngine.Mesh();
mesh.vertices = src.VertexBuffer.Positions.GetSpan <Vector3>().ToArray();
mesh.normals = src.VertexBuffer.Normals?.GetSpan <Vector3>().ToArray();
mesh.uv = src.VertexBuffer.TexCoords?.GetSpan <Vector2>().ToArray();
mesh.colors = src.VertexBuffer.Colors?.GetSpan <Color>().ToArray();
if (src.VertexBuffer.Weights != null && src.VertexBuffer.Joints != null)
{
var boneWeights = new BoneWeight[mesh.vertexCount];
if (src.VertexBuffer.Weights.Count != mesh.vertexCount || src.VertexBuffer.Joints.Count != mesh.vertexCount)
{
throw new ArgumentException();
}
var weights = src.VertexBuffer.Weights.GetSpan <Vector4>();
var joints = src.VertexBuffer.Joints.GetSpan <VrmLib.SkinJoints>();
if (skin != null)
{
mesh.bindposes = skin.InverseMatrices.GetSpan <Matrix4x4>().ToArray();
}
for (int i = 0; i < weights.Length; ++i)
{
var w = weights[i];
boneWeights[i].weight0 = w.x;
boneWeights[i].weight1 = w.y;
boneWeights[i].weight2 = w.z;
boneWeights[i].weight3 = w.w;
}
for (int i = 0; i < joints.Length; ++i)
{
var j = joints[i];
boneWeights[i].boneIndex0 = j.Joint0;
boneWeights[i].boneIndex1 = j.Joint1;
boneWeights[i].boneIndex2 = j.Joint2;
boneWeights[i].boneIndex3 = j.Joint3;
}
mesh.boneWeights = boneWeights;
}
mesh.subMeshCount = src.Submeshes.Count;
var triangles = src.IndexBuffer.GetAsIntList();
for (int i = 0; i < src.Submeshes.Count; ++i)
{
var submesh = src.Submeshes[i];
mesh.SetTriangles(triangles.GetRange(submesh.Offset, submesh.DrawCount), i);
}
foreach (var morphTarget in src.MorphTargets)
{
var positions =
morphTarget.VertexBuffer.Positions != null
? morphTarget.VertexBuffer.Positions.GetSpan <Vector3>().ToArray()
: new Vector3[mesh.vertexCount] // dummy
;
mesh.AddBlendShapeFrame(morphTarget.Name, 100.0f, positions, null, null);
}
mesh.RecalculateBounds();
mesh.RecalculateTangents();
return(mesh);
}
