static void OnExportClicked(GameObject root, GltfExportSettings settings)
{
string directory;
if (string.IsNullOrEmpty(m_lastExportDir))
{
directory = Directory.GetParent(Application.dataPath).ToString();
}
else
{
directory = m_lastExportDir;
}
// save dialog
var path = EditorUtility.SaveFilePanel(
"Save vrm",
directory,
root.name + ".glb",
"glb,gltf");
if (string.IsNullOrEmpty(path))
{
return;
}
m_lastExportDir = Path.GetDirectoryName(path).Replace("\\", "/");
// export
Export(root, path, new MeshExportSettings
{
ExportOnlyBlendShapePosition = settings.DropNormal,
UseSparseAccessorForMorphTarget = settings.Sparse,
}, settings.InverseAxis);
}
protected override void Initialize()
{
m_settings = ScriptableObject.CreateInstance <GltfExportSettings>();
m_settings.InverseAxis = UniGLTFPreference.GltfIOAxis;
m_settingsInspector = Editor.CreateEditor(m_settings);
m_meshes = ScriptableObject.CreateInstance <MeshExportValidator>();
m_meshesInspector = Editor.CreateEditor(m_meshes);
}
public void SetRoot(GameObject ExportRoot, GltfExportSettings settings, IBlendShapeExportFilter blendShapeFilter)
{
if (ExportRoot == null)
{
return;
}
Meshes.GetInfo(ExportRoot.transform.Traverse().Skip(1), settings);
foreach (var info in Meshes)
{
info.CalcMeshSize(ExportRoot, info.Renderers[0].Item1, settings, blendShapeFilter);
}
}
public void DividedVertexBufferTest()
{
var glTF = new glTF();
var bytesBuffer = new ArrayByteBuffer(new byte[50 * 1024 * 1024]);
var bufferIndex = glTF.AddBuffer(bytesBuffer);
var Materials = new List <Material> {
new Material(Shader.Find("Standard")), // A
new Material(Shader.Find("Standard")), // B
};
var(go, mesh) = CreateMesh(Materials.ToArray());
var meshExportSettings = new GltfExportSettings
{
DivideVertexBuffer = true
};
var axisInverter = Axes.X.Create();
var unityMesh = MeshExportList.Create(go);
var(gltfMesh, blendShapeIndexMap) = meshExportSettings.DivideVertexBuffer
? MeshExporter_DividedVertexBuffer.Export(glTF, bufferIndex, unityMesh, Materials, axisInverter, meshExportSettings)
: MeshExporter_SharedVertexBuffer.Export(glTF, bufferIndex, unityMesh, Materials, axisInverter, meshExportSettings)
;
{
var indices = glTF.GetIndices(gltfMesh.primitives[0].indices);
Assert.AreEqual(0, indices[0]);
Assert.AreEqual(1, indices[1]);
Assert.AreEqual(3, indices[2]);
Assert.AreEqual(3, indices[3]);
Assert.AreEqual(1, indices[4]);
Assert.AreEqual(2, indices[5]);
}
{
var positions = glTF.GetArrayFromAccessor <Vector3>(gltfMesh.primitives[0].attributes.POSITION);
Assert.AreEqual(4, positions.Length);
}
{
var indices = glTF.GetIndices(gltfMesh.primitives[1].indices);
Assert.AreEqual(0, indices[0]);
Assert.AreEqual(1, indices[1]);
Assert.AreEqual(3, indices[2]);
Assert.AreEqual(3, indices[3]);
Assert.AreEqual(1, indices[4]);
Assert.AreEqual(2, indices[5]);
}
{
var positions = glTF.GetArrayFromAccessor <Vector3>(gltfMesh.primitives[1].attributes.POSITION);
Assert.AreEqual(4, positions.Length);
}
}
protected override void Clear()
{
// m_settingsInspector
UnityEditor.Editor.DestroyImmediate(m_settingsInspector);
m_settingsInspector = null;
// m_meshesInspector
UnityEditor.Editor.DestroyImmediate(m_meshesInspector);
m_meshesInspector = null;
// m_settings
ScriptableObject.DestroyImmediate(m_settings);
m_settings = null;
}
public void DividedVertexBufferTest()
{
var data = new ExportingGltfData(50 * 1024 * 1024);
var Materials = new List <Material> {
new Material(Shader.Find("Standard")), // A
new Material(Shader.Find("Standard")), // B
};
var(go, mesh) = CreateMesh(Materials.ToArray());
var meshExportSettings = new GltfExportSettings
{
DivideVertexBuffer = true
};
var axisInverter = Axes.X.Create();
var unityMesh = MeshExportList.Create(go);
var(gltfMesh, blendShapeIndexMap) = meshExportSettings.DivideVertexBuffer
? MeshExporter_DividedVertexBuffer.Export(data, unityMesh, Materials, axisInverter, meshExportSettings)
: MeshExporter_SharedVertexBuffer.Export(data, unityMesh, Materials, axisInverter, meshExportSettings)
;
var parsed = GltfData.CreateFromGltfDataForTest(data.GLTF, data.BinBytes);
{
var indices = parsed.GetIndices(gltfMesh.primitives[0].indices);
Assert.AreEqual(0, indices[0]);
Assert.AreEqual(1, indices[1]);
Assert.AreEqual(3, indices[2]);
Assert.AreEqual(3, indices[3]);
Assert.AreEqual(1, indices[4]);
Assert.AreEqual(2, indices[5]);
}
{
var positions = parsed.GetArrayFromAccessor <Vector3>(gltfMesh.primitives[0].attributes.POSITION);
Assert.AreEqual(4, positions.Length);
}
{
var indices = parsed.GetIndices(gltfMesh.primitives[1].indices);
Assert.AreEqual(0, indices[0]);
Assert.AreEqual(1, indices[1]);
Assert.AreEqual(3, indices[2]);
Assert.AreEqual(3, indices[3]);
Assert.AreEqual(1, indices[4]);
Assert.AreEqual(2, indices[5]);
}
{
var positions = parsed.GetArrayFromAccessor <Vector3>(gltfMesh.primitives[1].attributes.POSITION);
Assert.AreEqual(4, positions.Length);
}
}
void OnDisable()
{
m_state.Dispose();
// Debug.Log("OnDisable");
Selection.selectionChanged -= Repaint;
Undo.willFlushUndoRecord -= Repaint;
// m_settingsInspector
UnityEditor.Editor.DestroyImmediate(m_settingsInspector);
m_settingsInspector = null;
// m_settings
ScriptableObject.DestroyImmediate(m_settings);
m_settings = null;
}
void OnEnable()
{
// Debug.Log("OnEnable");
Undo.willFlushUndoRecord += Repaint;
Selection.selectionChanged += Repaint;
m_settings = ScriptableObject.CreateInstance <GltfExportSettings>();
m_settingsInspector = Editor.CreateEditor(m_settings);
m_state = new MeshUtility.ExporterDialogState();
m_state.ExportRootChanged += (root) =>
{
Repaint();
};
m_state.ExportRoot = Selection.activeObject as GameObject;
}
private static Texture2D AssignTextureToMaterialPropertyAndExportAndExtract(Texture2D srcTex, string srcImageName, string propertyName)
{
// Prepare
var root = GameObject.CreatePrimitive(PrimitiveType.Cube);
var mat = new Material(Shader.Find("Standard"));
mat.SetTexture(propertyName, srcTex);
root.GetComponent <MeshRenderer>().sharedMaterial = mat;
// Export glTF
var gltf = new glTF();
using (var exporter = new gltfExporter(gltf, new GltfExportSettings
{
InverseAxis = Axes.X
}))
{
exporter.Prepare(root);
var settings = new GltfExportSettings
{
ExportOnlyBlendShapePosition = false,
UseSparseAccessorForMorphTarget = false,
DivideVertexBuffer = false,
};
exporter.Export(settings, new EditorTextureSerializer());
}
Assert.AreEqual(1, gltf.images.Count);
var exportedImage = gltf.images[0];
Assert.AreEqual("image/png", exportedImage.mimeType);
Assert.AreEqual(srcImageName, exportedImage.name);
UnityEngine.Object.DestroyImmediate(mat);
UnityEngine.Object.DestroyImmediate(root);
// Extract Image to Texture2D
var exportedBytes = gltf.GetViewBytes(exportedImage.bufferView).ToArray();
var exportedTexture = new Texture2D(2, 2, TextureFormat.ARGB32, mipChain: false, linear: false);
Assert.IsTrue(exportedTexture.LoadImage(exportedBytes)); // Always true ?
Assert.AreEqual(srcTex.width, exportedTexture.width);
Assert.AreEqual(srcTex.height, exportedTexture.height);
return(exportedTexture);
}
public gltfExporter(ExportingGltfData data, GltfExportSettings settings, IProgress <ExportProgress> progress = null)
{
_data = data;
_gltf.extensionsUsed.AddRange(ExtensionUsed);
_gltf.asset = new glTFAssets
{
generator = "UniGLTF-" + UniGLTFVersion.VERSION,
version = "2.0",
};
m_settings = settings;
if (m_settings == null)
{
// default
m_settings = new GltfExportSettings();
}
}
public gltfExporter(glTF gltf, GltfExportSettings settings)
{
glTF = gltf;
glTF.extensionsUsed.AddRange(ExtensionUsed);
glTF.asset = new glTFAssets
{
generator = "UniGLTF-" + UniGLTFVersion.VERSION,
version = "2.0",
};
m_settings = settings;
if (m_settings == null)
{
// default
m_settings = new GltfExportSettings();
}
}
/// <summary>
/// primitive 間で vertex を共有する形で Export する。
/// UniVRM-0.71.0 以降は、MeshExporterDivided.Export もある。
///
/// * GLB/GLTF は shared(default) と divided を選択可能
/// * VRM0 は shared 仕様
/// * VRM1 は divided 仕様
///
/// /// </summary>
/// <param name="gltf"></param>
/// <param name="bufferIndex"></param>
/// <param name="unityMesh"></param>
/// <param name="unityMaterials"></param>
/// <param name="axisInverter"></param>
/// <param name="settings"></param>
/// <returns></returns>
public static (glTFMesh, Dictionary <int, int> blendShapeIndexMap) Export(ExportingGltfData data,
MeshExportInfo unityMesh, List <Material> unityMaterials,
IAxisInverter axisInverter, GltfExportSettings settings)
{
var mesh = unityMesh.Mesh;
var materials = unityMesh.Materials;
var positions = mesh.vertices.Select(axisInverter.InvertVector3).ToArray();
var positionAccessorIndex = data.ExtendBufferAndGetAccessorIndex(positions, glBufferTarget.ARRAY_BUFFER);
data.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();
data.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 = data.ExtendBufferAndGetAccessorIndex(mesh.normals.Select(y => axisInverter.InvertVector3(y.normalized)).ToArray(), glBufferTarget.ARRAY_BUFFER);
int?tangentAccessorIndex = default;
if (settings.ExportTangents)
{
tangentAccessorIndex = data.ExtendBufferAndGetAccessorIndex(mesh.tangents.Select(axisInverter.InvertVector4).ToArray(), glBufferTarget.ARRAY_BUFFER);
}
var uvAccessorIndex0 = data.ExtendBufferAndGetAccessorIndex(mesh.uv.Select(y => y.ReverseUV()).ToArray(), glBufferTarget.ARRAY_BUFFER);
var uvAccessorIndex1 = data.ExtendBufferAndGetAccessorIndex(mesh.uv2.Select(y => y.ReverseUV()).ToArray(), glBufferTarget.ARRAY_BUFFER);
var colorAccessorIndex = -1;
var vColorState = VertexColorUtility.DetectVertexColor(mesh, materials);
if (vColorState == VertexColorState.ExistsAndIsUsed || // VColor使っている
vColorState == 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 = data.ExtendBufferAndGetAccessorIndex(mesh.colors, glBufferTarget.ARRAY_BUFFER);
}
var boneweights = mesh.boneWeights;
var weightAccessorIndex = data.ExtendBufferAndGetAccessorIndex(boneweights.Select(y => new Vector4(y.weight0, y.weight1, y.weight2, y.weight3)).ToArray(), glBufferTarget.ARRAY_BUFFER);
var jointsAccessorIndex = data.ExtendBufferAndGetAccessorIndex(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 (tangentAccessorIndex.HasValue)
{
attributes.TANGENT = tangentAccessorIndex.Value;
}
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 = data.ExtendBufferAndGetAccessorIndex(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.Mesh.name);
break;
}
gltfMesh.primitives.Add(new glTFPrimitives
{
attributes = attributes,
indices = indicesAccessorIndex,
mode = 4, // triangles ?
material = unityMaterials.IndexOf(materials[j])
});
}
var blendShapeIndexMap = new Dictionary <int, int>();
{
var targetNames = new List <string>();
int exportBlendShapes = 0;
for (int j = 0; j < unityMesh.Mesh.blendShapeCount; ++j)
{
var morphTarget = ExportMorphTarget(data,
unityMesh.Mesh, j,
settings.UseSparseAccessorForMorphTarget,
settings.ExportOnlyBlendShapePosition, axisInverter);
if (morphTarget.POSITION < 0)
{
// Skip empty blendShape.
// Shift blendShape's index.
continue;
}
var blendShapeName = unityMesh.Mesh.GetBlendShapeName(j);
blendShapeIndexMap.Add(j, exportBlendShapes++);
targetNames.Add(blendShapeName);
//
// all primitive has same blendShape
//
for (int k = 0; k < gltfMesh.primitives.Count; ++k)
{
gltfMesh.primitives[k].targets.Add(morphTarget);
}
}
gltf_mesh_extras_targetNames.Serialize(gltfMesh, targetNames);
}
return(gltfMesh, blendShapeIndexMap);
}
public virtual glTFMaterial ExportMaterial(Material m, ITextureExporter textureExporter, GltfExportSettings settings)
{
var material = CreateMaterial(m);
// common params
material.name = m.name;
Export_Color(m, textureExporter, material);
Export_Emission(m, textureExporter, material, settings.UseEmissiveMultiplier);
Export_Normal(m, textureExporter, material);
Export_OcclusionMetallicRoughness(m, textureExporter, material);
return(material);
}
public virtual void Export(GltfExportSettings meshExportSettings, ITextureSerializer textureSerializer)
{
var bytesBuffer = new ArrayByteBuffer(new byte[50 * 1024 * 1024]);
var bufferIndex = glTF.AddBuffer(bytesBuffer);
Nodes = Copy.transform.Traverse()
.Skip(1) // exclude root object for the symmetry with the importer
.ToList();
var uniqueUnityMeshes = new List <MeshExportInfo>();
MeshExportInfo.GetInfo(Nodes, uniqueUnityMeshes, meshExportSettings);
#region Materials and Textures
Materials = uniqueUnityMeshes.SelectMany(x => x.Materials).Where(x => x != null).Distinct().ToList();
m_textureExporter = new TextureExporter(textureSerializer);
var materialExporter = CreateMaterialExporter();
glTF.materials = Materials.Select(x => materialExporter.ExportMaterial(x, TextureExporter, m_settings)).ToList();
#endregion
#region Meshes
MeshBlendShapeIndexMap = new Dictionary <Mesh, Dictionary <int, int> >();
foreach (var unityMesh in uniqueUnityMeshes)
{
var(gltfMesh, blendShapeIndexMap) = meshExportSettings.DivideVertexBuffer
? MeshExporter_DividedVertexBuffer.Export(glTF, bufferIndex, unityMesh, Materials, m_settings.InverseAxis.Create(), meshExportSettings)
: MeshExporter_SharedVertexBuffer.Export(glTF, bufferIndex, unityMesh, Materials, m_settings.InverseAxis.Create(), meshExportSettings)
;
glTF.meshes.Add(gltfMesh);
Meshes.Add(unityMesh.Mesh);
if (!MeshBlendShapeIndexMap.ContainsKey(unityMesh.Mesh))
{
// 重複防止
MeshBlendShapeIndexMap.Add(unityMesh.Mesh, blendShapeIndexMap);
}
}
#endregion
#region Nodes and Skins
var skins = uniqueUnityMeshes
.SelectMany(x => x.Renderers)
.Where(x => x.Item1 is SkinnedMeshRenderer && x.UniqueBones != null)
.Select(x => x.Item1 as SkinnedMeshRenderer)
.ToList()
;
foreach (var node in Nodes)
{
var gltfNode = ExportNode(node, Nodes, uniqueUnityMeshes, skins);
glTF.nodes.Add(gltfNode);
}
glTF.scenes = new List <gltfScene>
{
new gltfScene
{
nodes = Copy.transform.GetChildren().Select(x => Nodes.IndexOf(x)).ToArray(),
}
};
foreach (var x in uniqueUnityMeshes)
{
foreach (var(renderer, uniqueBones) in x.Renderers)
{
if (uniqueBones != null && renderer is SkinnedMeshRenderer smr)
{
var matrices = x.GetBindPoses().Select(m_settings.InverseAxis.Create().InvertMat4).ToArray();
var accessor = glTF.ExtendBufferAndGetAccessorIndex(bufferIndex, matrices, glBufferTarget.NONE);
var skin = new glTFSkin
{
inverseBindMatrices = accessor,
joints = uniqueBones.Select(y => Nodes.IndexOf(y)).ToArray(),
skeleton = Nodes.IndexOf(smr.rootBone),
};
var skinIndex = glTF.skins.Count;
glTF.skins.Add(skin);
foreach (var z in Nodes.Where(y => y.Has(renderer)))
{
var nodeIndex = Nodes.IndexOf(z);
var node = glTF.nodes[nodeIndex];
node.skin = skinIndex;
}
}
}
}
#endregion
#if UNITY_EDITOR
#region Animations
var clips = new List <AnimationClip>();
var animator = Copy.GetComponent <Animator>();
var animation = Copy.GetComponent <Animation>();
if (animator != null)
{
clips = AnimationExporter.GetAnimationClips(animator);
}
else if (animation != null)
{
clips = AnimationExporter.GetAnimationClips(animation);
}
if (clips.Any())
{
foreach (AnimationClip clip in clips)
{
var animationWithCurve = AnimationExporter.Export(clip, Copy.transform, Nodes);
foreach (var kv in animationWithCurve.SamplerMap)
{
var sampler = animationWithCurve.Animation.samplers[kv.Key];
var inputAccessorIndex = glTF.ExtendBufferAndGetAccessorIndex(bufferIndex, kv.Value.Input);
sampler.input = inputAccessorIndex;
var outputAccessorIndex = glTF.ExtendBufferAndGetAccessorIndex(bufferIndex, kv.Value.Output);
sampler.output = outputAccessorIndex;
// modify accessors
var outputAccessor = glTF.accessors[outputAccessorIndex];
var channel = animationWithCurve.Animation.channels.First(x => x.sampler == kv.Key);
switch (glTFAnimationTarget.GetElementCount(channel.target.path))
{
case 1:
outputAccessor.type = "SCALAR";
//outputAccessor.count = ;
break;
case 3:
outputAccessor.type = "VEC3";
outputAccessor.count /= 3;
break;
case 4:
outputAccessor.type = "VEC4";
outputAccessor.count /= 4;
break;
default:
throw new NotImplementedException();
}
}
animationWithCurve.Animation.name = clip.name;
glTF.animations.Add(animationWithCurve.Animation);
}
}
#endregion
#endif
ExportExtensions(textureSerializer);
// Extension で Texture が増える場合があるので最後に呼ぶ
var exported = m_textureExporter.Export();
for (var exportedTextureIdx = 0; exportedTextureIdx < exported.Count; ++exportedTextureIdx)
{
var(unityTexture, colorSpace) = exported[exportedTextureIdx];
glTF.PushGltfTexture(bufferIndex, unityTexture, colorSpace, textureSerializer);
}
FixName(glTF);
}
/// <summary>
/// Divide vertex buffer(Position, Normal, UV, VertexColor, Skinning and BlendShapes) by submesh usage, then export
/// </summary>
/// <param name="gltf"></param>
/// <param name="gltfBuffer"></param>
/// <param name="unityMesh"></param>
/// <param name="unityMaterials"></param>
/// <param name="axisInverter"></param>
/// <param name="settings"></param>
/// <returns></returns>
public static (glTFMesh, Dictionary <int, int>) Export(ExportingGltfData data,
MeshExportInfo unityMesh, List <Material> unityMaterials,
IAxisInverter axisInverter, GltfExportSettings settings)
{
var mesh = unityMesh.Mesh;
var gltfMesh = new glTFMesh(mesh.name);
if (settings.ExportTangents)
{
// no support
throw new NotImplementedException();
}
var positions = mesh.vertices;
var normals = mesh.normals;
var uv = mesh.uv;
var boneWeights = mesh.boneWeights;
if (boneWeights.All(x => x.weight0 == 0 && x.weight1 == 0 && x.weight2 == 0 && x.weight3 == 0))
{
boneWeights = null;
}
var colors = mesh.colors;
Func <int, int> getJointIndex = null;
if (boneWeights != null && boneWeights.Length == positions.Length)
{
getJointIndex = unityMesh.GetJointIndex;
}
Vector3[] blendShapePositions = new Vector3[mesh.vertexCount];
Vector3[] blendShapeNormals = new Vector3[mesh.vertexCount];
var vColorState = VertexColorUtility.DetectVertexColor(mesh, unityMaterials);
var exportVertexColor = (
(settings.KeepVertexColor && mesh.colors != null && mesh.colors.Length == mesh.vertexCount) || // vertex color を残す設定
vColorState == VertexColorState.ExistsAndIsUsed || // VColor使っている
vColorState == 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)
);
var usedIndices = new List <int>();
for (int i = 0; i < mesh.subMeshCount; ++i)
{
var indices = mesh.GetIndices(i);
var hash = new HashSet <int>(indices);
// aggregate vertex attributes
var buffer = new MeshExportUtil.VertexBuffer(indices.Length, getJointIndex);
usedIndices.Clear();
for (int k = 0; k < positions.Length; ++k)
{
if (hash.Contains(k))
{
// aggregate indices
usedIndices.Add(k);
buffer.PushVertex(k,
axisInverter.InvertVector3(positions[k]), // POSITION
axisInverter.InvertVector3(normals[k]), // NORMAL
uv[k].ReverseUV() // UV
);
if (getJointIndex != null)
{
buffer.PushBoneWeight(boneWeights[k]);
}
if (exportVertexColor)
{
buffer.PushColor(colors[k]);
}
}
}
var material = unityMesh.Materials[i];
var materialIndex = -1;
if (material != null)
{
materialIndex = unityMaterials.IndexOf(material);
}
var flipped = new List <int>();
for (int j = 0; j < indices.Length; j += 3)
{
var t0 = indices[j];
var t1 = indices[j + 1];
var t2 = indices[j + 2];
flipped.Add(t2);
flipped.Add(t1);
flipped.Add(t0);
}
var gltfPrimitive = buffer.ToGltfPrimitive(data, materialIndex, flipped);
// blendShape(morph target)
for (int j = 0; j < mesh.blendShapeCount; ++j)
{
var blendShape = new MeshExportUtil.BlendShapeBuffer(usedIndices.Count);
// aggriage morph target
mesh.GetBlendShapeFrameVertices(j, 0, blendShapePositions, blendShapeNormals, null);
int l = 0;
foreach (var k in usedIndices)
{
blendShape.Set(l++,
axisInverter.InvertVector3(blendShapePositions[k]),
axisInverter.InvertVector3(blendShapeNormals[k]));
}
gltfPrimitive.targets.Add(blendShape.ToGltf(data, !settings.ExportOnlyBlendShapePosition,
settings.UseSparseAccessorForMorphTarget));
}
gltfMesh.primitives.Add(gltfPrimitive);
}
var targetNames = Enumerable.Range(0, mesh.blendShapeCount).Select(x => mesh.GetBlendShapeName(x)).ToArray();
gltf_mesh_extras_targetNames.Serialize(gltfMesh, targetNames);
return(gltfMesh, Enumerable.Range(0, mesh.blendShapeCount).ToDictionary(x => x, x => x));
}
/// <summary>
/// Divide vertex buffer(Position, Normal, UV, VertexColor, Skinning and BlendShapes) by submesh usage, then export
/// </summary>
/// <param name="gltf"></param>
/// <param name="gltfBuffer"></param>
/// <param name="unityMesh"></param>
/// <param name="unityMaterials"></param>
/// <param name="axisInverter"></param>
/// <param name="settings"></param>
/// <returns></returns>
public static (glTFMesh, Dictionary <int, int>) Export(glTF gltf, int gltfBuffer,
MeshExportInfo unityMesh, List <Material> unityMaterials,
IAxisInverter axisInverter, GltfExportSettings settings)
{
var mesh = unityMesh.Mesh;
var gltfMesh = new glTFMesh(mesh.name);
if (settings.ExportTangents)
{
// no support
throw new NotImplementedException();
}
var positions = mesh.vertices;
var normals = mesh.normals;
var uv = mesh.uv;
var boneWeights = mesh.boneWeights;
Func <int, int> getJointIndex = null;
if (boneWeights != null && boneWeights.Length == positions.Length)
{
getJointIndex = unityMesh.GetJointIndex;
}
Vector3[] blendShapePositions = new Vector3[mesh.vertexCount];
Vector3[] blendShapeNormals = new Vector3[mesh.vertexCount];
var usedIndices = new List <int>();
for (int i = 0; i < mesh.subMeshCount; ++i)
{
var indices = mesh.GetIndices(i);
var hash = new HashSet <int>(indices);
// aggrigate vertex attributes
var buffer = new MeshExportUtil.VertexBuffer(indices.Length, getJointIndex);
usedIndices.Clear();
for (int k = 0; k < positions.Length; ++k)
{
if (hash.Contains(k))
{
// aggrigate indices
usedIndices.Add(k);
buffer.Push(k, axisInverter.InvertVector3(positions[k]), axisInverter.InvertVector3(normals[k]), uv[k].ReverseUV());
if (getJointIndex != null)
{
buffer.Push(boneWeights[k]);
}
}
}
var material = unityMesh.Materials[i];
var materialIndex = -1;
if (material != null)
{
materialIndex = unityMaterials.IndexOf(material);
}
var flipped = new List <int>();
for (int j = 0; j < indices.Length; j += 3)
{
var t0 = indices[j];
var t1 = indices[j + 1];
var t2 = indices[j + 2];
flipped.Add(t2);
flipped.Add(t1);
flipped.Add(t0);
}
var gltfPrimitive = buffer.ToGltfPrimitive(gltf, gltfBuffer, materialIndex, flipped);
// blendShape(morph target)
for (int j = 0; j < mesh.blendShapeCount; ++j)
{
var blendShape = new MeshExportUtil.BlendShapeBuffer(usedIndices.Count);
// aggriage morph target
mesh.GetBlendShapeFrameVertices(j, 0, blendShapePositions, blendShapeNormals, null);
int l = 0;
foreach (var k in usedIndices)
{
blendShape.Set(l++,
axisInverter.InvertVector3(blendShapePositions[k]),
axisInverter.InvertVector3(blendShapeNormals[k]));
}
gltfPrimitive.targets.Add(blendShape.ToGltf(gltf, gltfBuffer, !settings.ExportOnlyBlendShapePosition,
settings.UseSparseAccessorForMorphTarget));
}
gltfMesh.primitives.Add(gltfPrimitive);
}
var targetNames = Enumerable.Range(0, mesh.blendShapeCount).Select(x => mesh.GetBlendShapeName(x)).ToArray();
gltf_mesh_extras_targetNames.Serialize(gltfMesh, targetNames);
return(gltfMesh, Enumerable.Range(0, mesh.blendShapeCount).ToDictionary(x => x, x => x));
}
