bool TryGetMeshInfo(GameObject root, Renderer renderer, out MeshExportInfo info)
{
info = default;
if (root == null)
{
info.Summary = "";
return(false);
}
if (renderer == null)
{
info.Summary = "no Renderer";
return(false);
}
info.Renderer = renderer;
if (renderer is SkinnedMeshRenderer smr)
{
info.Skinned = true;
info.Mesh = smr.sharedMesh;
info.IsRendererActive = smr.EnableForExport();
}
else if (renderer is MeshRenderer mr)
{
var filter = mr.GetComponent <MeshFilter>();
if (filter != null)
{
info.Mesh = filter.sharedMesh;
}
info.IsRendererActive = mr.EnableForExport();
}
else
{
info.Summary = "no Mesh";
return(false);
}
info.VertexColor = MeshExportInfo.DetectVertexColor(info.Mesh, info.Renderer.sharedMaterials);
var relativePath = UniGLTF.UnityExtensions.RelativePathFrom(renderer.transform, root.transform);
CalcMeshSize(ref info, relativePath);
return(true);
}
static glTFMesh ExportPrimitives(glTF gltf, int bufferIndex,
MeshWithRenderer unityMesh, List <Material> unityMaterials)
{
var mesh = unityMesh.Mesh;
var materials = unityMesh.Renderer.sharedMaterials;
var positions = mesh.vertices.Select(y => y.ReverseZ()).ToArray();
var positionAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, positions, glBufferTarget.ARRAY_BUFFER);
gltf.accessors[positionAccessorIndex].min = positions.Aggregate(positions[0], (a, b) => new Vector3(Mathf.Min(a.x, b.x), Math.Min(a.y, b.y), Mathf.Min(a.z, b.z))).ToArray();
gltf.accessors[positionAccessorIndex].max = positions.Aggregate(positions[0], (a, b) => new Vector3(Mathf.Max(a.x, b.x), Math.Max(a.y, b.y), Mathf.Max(a.z, b.z))).ToArray();
var normalAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, mesh.normals.Select(y => y.normalized.ReverseZ()).ToArray(), glBufferTarget.ARRAY_BUFFER);
#if GLTF_EXPORT_TANGENTS
var tangentAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, mesh.tangents.Select(y => y.ReverseZ()).ToArray(), glBufferTarget.ARRAY_BUFFER);
#endif
var uvAccessorIndex0 = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, mesh.uv.Select(y => y.ReverseUV()).ToArray(), glBufferTarget.ARRAY_BUFFER);
var uvAccessorIndex1 = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, mesh.uv2.Select(y => y.ReverseUV()).ToArray(), glBufferTarget.ARRAY_BUFFER);
var colorAccessorIndex = -1;
var vColorState = MeshExportInfo.DetectVertexColor(mesh, materials);
if (vColorState == MeshExportInfo.VertexColorState.ExistsAndIsUsed || // VColor使っている
vColorState == MeshExportInfo.VertexColorState.ExistsAndMixed // VColorを使っているところと使っていないところが混在(とりあえずExportする)
)
{
// UniUnlit で Multiply 設定になっている
colorAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, mesh.colors, glBufferTarget.ARRAY_BUFFER);
}
var boneweights = mesh.boneWeights;
var weightAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, boneweights.Select(y => new Vector4(y.weight0, y.weight1, y.weight2, y.weight3)).ToArray(), glBufferTarget.ARRAY_BUFFER);
var jointsAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, boneweights.Select(y =>
new UShort4(
(ushort)unityMesh.GetJointIndex(y.boneIndex0),
(ushort)unityMesh.GetJointIndex(y.boneIndex1),
(ushort)unityMesh.GetJointIndex(y.boneIndex2),
(ushort)unityMesh.GetJointIndex(y.boneIndex3))
).ToArray(), glBufferTarget.ARRAY_BUFFER);
var attributes = new glTFAttributes
{
POSITION = positionAccessorIndex,
};
if (normalAccessorIndex != -1)
{
attributes.NORMAL = normalAccessorIndex;
}
#if GLTF_EXPORT_TANGENTS
if (tangentAccessorIndex != -1)
{
attributes.TANGENT = tangentAccessorIndex;
}
#endif
if (uvAccessorIndex0 != -1)
{
attributes.TEXCOORD_0 = uvAccessorIndex0;
}
if (uvAccessorIndex1 != -1)
{
attributes.TEXCOORD_1 = uvAccessorIndex1;
}
if (colorAccessorIndex != -1)
{
attributes.COLOR_0 = colorAccessorIndex;
}
if (weightAccessorIndex != -1)
{
attributes.WEIGHTS_0 = weightAccessorIndex;
}
if (jointsAccessorIndex != -1)
{
attributes.JOINTS_0 = jointsAccessorIndex;
}
var gltfMesh = new glTFMesh(mesh.name);
var indices = new List <uint>();
for (int j = 0; j < mesh.subMeshCount; ++j)
{
indices.Clear();
var triangles = mesh.GetIndices(j);
if (triangles.Length == 0)
{
// https://github.com/vrm-c/UniVRM/issues/664
continue;
}
for (int i = 0; i < triangles.Length; i += 3)
{
var i0 = triangles[i];
var i1 = triangles[i + 1];
var i2 = triangles[i + 2];
// flip triangle
indices.Add((uint)i2);
indices.Add((uint)i1);
indices.Add((uint)i0);
}
var indicesAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, indices.ToArray(), glBufferTarget.ELEMENT_ARRAY_BUFFER);
if (indicesAccessorIndex < 0)
{
// https://github.com/vrm-c/UniVRM/issues/664
throw new Exception();
}
if (j >= materials.Length)
{
Debug.LogWarningFormat("{0}.materials is not enough", unityMesh.Renderer.name);
break;
}
gltfMesh.primitives.Add(new glTFPrimitives
{
attributes = attributes,
indices = indicesAccessorIndex,
mode = 4, // triangles ?
material = unityMaterials.IndexOf(materials[j])
});
}
return(gltfMesh);
}
static glTFMesh ExportPrimitives(glTF gltf, int bufferIndex,
string rendererName,
Mesh mesh, Material[] materials,
List <Material> unityMaterials)
{
var positions = mesh.vertices.Select(y => y.ReverseZ()).ToArray();
var positionAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, positions, glBufferTarget.ARRAY_BUFFER);
gltf.accessors[positionAccessorIndex].min = positions.Aggregate(positions[0], (a, b) => new Vector3(Mathf.Min(a.x, b.x), Math.Min(a.y, b.y), Mathf.Min(a.z, b.z))).ToArray();
gltf.accessors[positionAccessorIndex].max = positions.Aggregate(positions[0], (a, b) => new Vector3(Mathf.Max(a.x, b.x), Math.Max(a.y, b.y), Mathf.Max(a.z, b.z))).ToArray();
var normalAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, mesh.normals.Select(y => y.normalized.ReverseZ()).ToArray(), glBufferTarget.ARRAY_BUFFER);
#if GLTF_EXPORT_TANGENTS
var tangentAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, mesh.tangents.Select(y => y.ReverseZ()).ToArray(), glBufferTarget.ARRAY_BUFFER);
#endif
var uvAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, mesh.uv.Select(y => y.ReverseUV()).ToArray(), glBufferTarget.ARRAY_BUFFER);
var colorAccessorIndex = -1;
var vColorState = MeshExportInfo.DetectVertexColor(mesh, materials);
if (vColorState == MeshExportInfo.VertexColorState.ExistsAndIsUsed || // VColor使っている
vColorState == MeshExportInfo.VertexColorState.ExistsAndMixed // VColorを使っているところと使っていないところが混在(とりあえずExportする)
)
{
// UniUnlit で Multiply 設定になっている
colorAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, mesh.colors, glBufferTarget.ARRAY_BUFFER);
}
var boneweights = mesh.boneWeights;
var weightAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, boneweights.Select(y => new Vector4(y.weight0, y.weight1, y.weight2, y.weight3)).ToArray(), glBufferTarget.ARRAY_BUFFER);
var jointsAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, boneweights.Select(y => new UShort4((ushort)y.boneIndex0, (ushort)y.boneIndex1, (ushort)y.boneIndex2, (ushort)y.boneIndex3)).ToArray(), glBufferTarget.ARRAY_BUFFER);
var attributes = new glTFAttributes
{
POSITION = positionAccessorIndex,
};
if (normalAccessorIndex != -1)
{
attributes.NORMAL = normalAccessorIndex;
}
#if GLTF_EXPORT_TANGENTS
if (tangentAccessorIndex != -1)
{
attributes.TANGENT = tangentAccessorIndex;
}
#endif
if (uvAccessorIndex != -1)
{
attributes.TEXCOORD_0 = uvAccessorIndex;
}
if (colorAccessorIndex != -1)
{
attributes.COLOR_0 = colorAccessorIndex;
}
if (weightAccessorIndex != -1)
{
attributes.WEIGHTS_0 = weightAccessorIndex;
}
if (jointsAccessorIndex != -1)
{
attributes.JOINTS_0 = jointsAccessorIndex;
}
var gltfMesh = new glTFMesh(mesh.name);
for (int j = 0; j < mesh.subMeshCount; ++j)
{
var indices = TriangleUtil.FlipTriangle(mesh.GetIndices(j)).Select(y => (uint)y).ToArray();
var indicesAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, indices, glBufferTarget.ELEMENT_ARRAY_BUFFER);
if (j >= materials.Length)
{
Debug.LogWarningFormat("{0}.materials is not enough", rendererName);
break;
}
gltfMesh.primitives.Add(new glTFPrimitives
{
attributes = attributes,
indices = indicesAccessorIndex,
mode = 4, // triangles ?
material = unityMaterials.IndexOf(materials[j])
});
}
return(gltfMesh);
}
