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);
}
}
}
}
public static AnimationWithSampleCurves Export(AnimationClip clip, Transform root, List <Transform> nodes)
{
var animation = new AnimationWithSampleCurves
{
Animation = new glTFAnimation(),
};
#if UNITY_5_6_OR_NEWER
List <AnimationCurveData> curveDatum = new List <AnimationCurveData>();
foreach (var binding in AnimationUtility.GetCurveBindings(clip))
{
var curve = AnimationUtility.GetEditorCurve(clip, binding);
var property = AnimationExporter.PropertyToTarget(binding.propertyName);
if (property == glTFAnimationTarget.AnimationProperties.NotImplemented)
{
Debug.LogWarning("Not Implemented keyframe property : " + binding.propertyName);
continue;
}
if (property == glTFAnimationTarget.AnimationProperties.EulerRotation)
{
Debug.LogWarning("Interpolation setting of AnimationClip should be Quaternion");
continue;
}
var nodeIndex = GetNodeIndex(root, nodes, binding.path);
var samplerIndex = AddChannelAndGetSampler(animation.Animation, nodeIndex, property);
var elementCount = 0;
if (property == glTFAnimationTarget.AnimationProperties.BlendShape)
{
var mesh = nodes[nodeIndex].GetComponent <SkinnedMeshRenderer>().sharedMesh;
elementCount = mesh.blendShapeCount;
}
else
{
elementCount = glTFAnimationTarget.GetElementCount(property);
}
// 同一のsamplerIndexが割り当てられているcurveDataがある場合はそれを使用し、無ければ作る
var curveData = curveDatum.FirstOrDefault(x => x.SamplerIndex == samplerIndex);
if (curveData == null)
{
curveData = new AnimationCurveData(AnimationUtility.GetKeyRightTangentMode(curve, 0), property, samplerIndex, elementCount);
curveDatum.Add(curveData);
}
// 全てのキーフレームを回収
int elementOffset = 0;
float valueFactor = 1.0f;
if (property == glTFAnimationTarget.AnimationProperties.BlendShape)
{
var mesh = nodes[nodeIndex].GetComponent <SkinnedMeshRenderer>().sharedMesh;
var blendShapeName = binding.propertyName.Replace("blendShape.", "");
elementOffset = mesh.GetBlendShapeIndex(blendShapeName);
valueFactor = 0.01f;
}
else
{
elementOffset = AnimationExporter.GetElementOffset(binding.propertyName);
}
if (elementOffset >= 0 && elementOffset < elementCount)
{
for (int i = 0; i < curve.keys.Length; i++)
{
curveData.SetKeyframeData(curve.keys[i].time, curve.keys[i].value * valueFactor, elementOffset);
}
}
}
//キー挿入
foreach (var curve in curveDatum)
{
if (curve.Keyframes.Count == 0)
{
continue;
}
curve.RecountEmptyKeyframe();
var elementNum = curve.Keyframes.First().Values.Length;
var values = default(InputOutputValues);
if (!animation.SamplerMap.TryGetValue(curve.SamplerIndex, out values))
{
values = new InputOutputValues();
values.Input = new float[curve.Keyframes.Count];
values.Output = new float[curve.Keyframes.Count * elementNum];
animation.SamplerMap[curve.SamplerIndex] = values;
animation.Animation.samplers[curve.SamplerIndex].interpolation = curve.GetInterpolation();
}
int keyframeIndex = 0;
foreach (var keyframe in curve.Keyframes)
{
values.Input[keyframeIndex] = keyframe.Time;
Buffer.BlockCopy(keyframe.GetRightHandCoordinate(), 0, values.Output, keyframeIndex * elementNum * sizeof(float), elementNum * sizeof(float));
keyframeIndex++;
}
}
#endif
return(animation);
}