void FromGameObject(glTF gltf, GameObject go, bool useSparseAccessorForMorphTarget = false)
{
var bytesBuffer = new ArrayByteBuffer(new byte[50 * 1024 * 1024]);
var bufferIndex = gltf.AddBuffer(bytesBuffer);
GameObject tmpParent = null;
if (go.transform.childCount == 0)
{
tmpParent = new GameObject("tmpParent");
go.transform.SetParent(tmpParent.transform, true);
go = tmpParent;
}
try
{
Nodes = go.transform.Traverse()
.Skip(1) // exclude root object for the symmetry with the importer
.ToList();
#region Materials and Textures
//Materials = Nodes.SelectMany(x => x.GetSharedMaterials()).Where(x => x != null).Distinct().ToList();
//var unityTextures = Materials.SelectMany(x => TextureIO.GetTextures(x)).Where(x => x.Texture != null).Distinct().ToList();
//TextureManager = new TextureExportManager(unityTextures.Select(x => x.Texture));
//var materialExporter = CreateMaterialExporter();
//gltf.materials = Materials.Select(x => materialExporter.ExportMaterial(x, TextureManager)).ToList();
//for (int i = 0; i < unityTextures.Count; ++i)
//{
// var unityTexture = unityTextures[i];
// TextureIO.ExportTexture(gltf, bufferIndex, TextureManager.GetExportTexture(i), unityTexture.TextureType);
//}
FromGameObjectMaterialsAndTextures(gltf, go, bufferIndex);
#endregion
#region Meshes
var unityMeshes = Nodes
.Select(x => new MeshWithRenderer
{
Mesh = x.GetSharedMesh(),
Renderer = x.GetComponent <Renderer>(),
})
.Where(x =>
{
if (x.Mesh == null)
{
return(false);
}
if (x.Renderer.sharedMaterials == null ||
x.Renderer.sharedMaterials.Length == 0)
{
return(false);
}
return(true);
})
.ToList();
MeshExporter.ExportMeshes(gltf, bufferIndex, unityMeshes, Materials, useSparseAccessorForMorphTarget, ExportOnlyBlendShapePosition);
Meshes = unityMeshes.Select(x => x.Mesh).ToList();
#endregion
#region Nodes and Skins
var unitySkins = Nodes
.Select(x => x.GetComponent <SkinnedMeshRenderer>()).Where(x =>
x != null &&
x.bones != null &&
x.bones.Length > 0)
.ToList();
gltf.nodes = Nodes.Select(x => ExportNode(x, Nodes, unityMeshes.Select(y => y.Renderer).ToList(), unitySkins)).ToList();
gltf.scenes = new List <glTFScene>
{
new glTFScene
{
nodes = go.transform.GetChildren().Select(x => Nodes.IndexOf(x)).ToArray(),
}
};
foreach (var x in unitySkins)
{
var matrices = x.sharedMesh.bindposes.Select(y => y.ReverseZ()).ToArray();
var accessor = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, matrices, glBufferTarget.NONE);
var skin = new glTFSkin
{
inverseBindMatrices = accessor,
joints = x.bones.Select(y => Nodes.IndexOf(y)).ToArray(),
skeleton = Nodes.IndexOf(x.rootBone),
};
var skinIndex = gltf.skins.Count;
gltf.skins.Add(skin);
foreach (var z in Nodes.Where(y => y.Has(x)))
{
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 = go.GetComponent <Animator>();
var animation = go.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, go.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
}
finally
{
if (tmpParent != null)
{
tmpParent.transform.GetChild(0).SetParent(null);
if (Application.isPlaying)
{
GameObject.Destroy(tmpParent);
}
else
{
GameObject.DestroyImmediate(tmpParent);
}
}
}
}
static gltfMorphTarget ExportMorphTarget(glTF gltf, int bufferIndex,
Mesh mesh, int j,
bool useSparseAccessorForMorphTarget,
bool exportOnlyBlendShapePosition)
{
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(j);
mesh.GetBlendShapeFrameVertices(j, frameCount - 1, blendShapeVertices, blendShapeNormals, null);
var blendShapePositionAccessorIndex = -1;
var blendShapeNormalAccessorIndex = -1;
var blendShapeTangentAccessorIndex = -1;
if (useSparseAccessorForMorphTarget)
{
var accessorCount = blendShapeVertices.Length;
var sparseIndices = Enumerable.Range(0, blendShapeVertices.Length)
.Where(x => UseSparse(
usePosition, blendShapeVertices[x],
useNormal, blendShapeNormals[x],
useTangent, blendShapeTangents[x]))
.ToArray()
;
if (sparseIndices.Length == 0)
{
usePosition = false;
useNormal = false;
useTangent = false;
}
else
{
Debug.LogFormat("Sparse {0}/{1}", sparseIndices.Length, mesh.vertexCount);
}
/*
* var vertexSize = 12;
* if (useNormal) vertexSize += 12;
* if (useTangent) vertexSize += 24;
* var sparseBytes = (4 + vertexSize) * sparseIndices.Length;
* var fullBytes = (vertexSize) * blendShapeVertices.Length;
* Debug.LogFormat("Export sparse: {0}/{1}bytes({2}%)",
* sparseBytes, fullBytes, (int)((float)sparseBytes / fullBytes)
* );
*/
var sparseIndicesViewIndex = -1;
if (usePosition)
{
sparseIndicesViewIndex = gltf.ExtendBufferAndGetViewIndex(bufferIndex, sparseIndices);
blendShapeVertices = sparseIndices.Select(x => blendShapeVertices[x].ReverseZ()).ToArray();
blendShapePositionAccessorIndex = gltf.ExtendSparseBufferAndGetAccessorIndex(bufferIndex, accessorCount,
blendShapeVertices,
sparseIndices, sparseIndicesViewIndex,
glBufferTarget.ARRAY_BUFFER);
}
if (useNormal)
{
blendShapeNormals = sparseIndices.Select(x => blendShapeNormals[x].ReverseZ()).ToArray();
blendShapeNormalAccessorIndex = gltf.ExtendSparseBufferAndGetAccessorIndex(bufferIndex, accessorCount,
blendShapeNormals,
sparseIndices, sparseIndicesViewIndex,
glBufferTarget.ARRAY_BUFFER);
}
if (useTangent)
{
blendShapeTangents = sparseIndices.Select(x => blendShapeTangents[x].ReverseZ()).ToArray();
blendShapeTangentAccessorIndex = gltf.ExtendSparseBufferAndGetAccessorIndex(bufferIndex, accessorCount,
blendShapeTangents, sparseIndices, sparseIndicesViewIndex,
glBufferTarget.ARRAY_BUFFER);
}
}
else
{
for (int i = 0; i < blendShapeVertices.Length; ++i)
{
blendShapeVertices[i] = blendShapeVertices[i].ReverseZ();
}
if (usePosition)
{
blendShapePositionAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex,
blendShapeVertices,
glBufferTarget.ARRAY_BUFFER);
}
if (useNormal)
{
for (int i = 0; i < blendShapeNormals.Length; ++i)
{
blendShapeNormals[i] = blendShapeNormals[i].ReverseZ();
}
blendShapeNormalAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex,
blendShapeNormals,
glBufferTarget.ARRAY_BUFFER);
}
if (useTangent)
{
for (int i = 0; i < blendShapeTangents.Length; ++i)
{
blendShapeTangents[i] = blendShapeTangents[i].ReverseZ();
}
blendShapeTangentAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex,
blendShapeTangents,
glBufferTarget.ARRAY_BUFFER);
}
}
if (blendShapePositionAccessorIndex != -1)
{
gltf.accessors[blendShapePositionAccessorIndex].min = blendShapeVertices.Aggregate(blendShapeVertices[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[blendShapePositionAccessorIndex].max = blendShapeVertices.Aggregate(blendShapeVertices[0], (a, b) => new Vector3(Mathf.Max(a.x, b.x), Math.Max(a.y, b.y), Mathf.Max(a.z, b.z))).ToArray();
}
return(new gltfMorphTarget
{
POSITION = blendShapePositionAccessorIndex,
NORMAL = blendShapeNormalAccessorIndex,
TANGENT = blendShapeTangentAccessorIndex,
});
}
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 = 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);
}
public static int ExtendBufferAndGetAccessorIndex <T>(this glTF gltf, int bufferIndex, T[] array,
glBufferTarget target = glBufferTarget.NONE) where T : struct
{
return(gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, new ArraySegment <T>(array), target));
}