static MeshWithMaterials ImportMesh(glTF gltf, int meshIndex, glTFMesh gltfMesh,
List <Material> materials,
GetBlendShapeName getBlendShapeName
)
{
glTFAttributes lastAttributes = null;
var sharedAttributes = true;
foreach (var prim in gltfMesh.primitives)
{
if (lastAttributes != null && !prim.attributes.Equals(lastAttributes))
{
sharedAttributes = false;
break;
}
lastAttributes = prim.attributes;
}
var positions = new List <Vector3>();
var normals = new List <Vector3>();
var tangents = new List <Vector4>();
var colors = new List <Vector4>();
var uv = new List <Vector2>();
var boneWeights = new List <BoneWeight>();
var subMeshes = new List <int[]>();
var materialIndices = new List <int>();
BlendShape[] blendShapes = null;
if (sharedAttributes)
{
// multiple submesh sharing same VertexBuffer
{
var prim = gltfMesh.primitives.First();
positions.AddRange(gltf.GetArrayFromAccessor <Vector3>(prim.attributes.POSITION).Select(x => x.ReverseZ()));
// normal
if (prim.attributes.NORMAL != -1)
{
normals.AddRange(gltf.GetArrayFromAccessor <Vector3>(prim.attributes.NORMAL).Select(x => x.ReverseZ()));
}
// tangent
if (prim.attributes.TANGENT != -1)
{
tangents.AddRange(gltf.GetArrayFromAccessor <Vector4>(prim.attributes.TANGENT).Select(x => x.ReverseZ()));
}
// vertex color
if (prim.attributes.COLOR_0 != -1)
{
colors.AddRange(gltf.GetArrayFromAccessor <Vector4>(prim.attributes.COLOR_0));
}
// uv
if (prim.attributes.TEXCOORD_0 != -1)
{
uv.AddRange(gltf.GetArrayFromAccessor <Vector2>(prim.attributes.TEXCOORD_0).Select(x => x.ReverseY()));
}
else
{
// for inconsistent attributes in primitives
uv.AddRange(new Vector2[positions.Count]);
}
// skin
if (prim.attributes.JOINTS_0 != -1 && prim.attributes.WEIGHTS_0 != -1)
{
var joints0 = gltf.GetArrayFromAccessor <UShort4>(prim.attributes.JOINTS_0); // uint4
var weights0 = gltf.GetArrayFromAccessor <Float4>(prim.attributes.WEIGHTS_0).Select(x => x.One()).ToArray();
for (int j = 0; j < joints0.Length; ++j)
{
var bw = new BoneWeight();
bw.boneIndex0 = joints0[j].x;
bw.weight0 = weights0[j].x;
bw.boneIndex1 = joints0[j].y;
bw.weight1 = weights0[j].y;
bw.boneIndex2 = joints0[j].z;
bw.weight2 = weights0[j].z;
bw.boneIndex3 = joints0[j].w;
bw.weight3 = weights0[j].w;
boneWeights.Add(bw);
}
}
// blendshape
if (prim.targets != null && prim.targets.Count > 0)
{
if (blendShapes == null)
{
blendShapes = prim.targets.Select((x, i) => new BlendShape(getBlendShapeName(meshIndex, i))).ToArray();
}
for (int i = 0; i < prim.targets.Count; ++i)
{
//var name = string.Format("target{0}", i++);
var primTarget = prim.targets[i];
var blendShape = blendShapes[i];
if (primTarget.POSITION != -1)
{
blendShape.Positions.AddRange(
gltf.GetArrayFromAccessor <Vector3>(primTarget.POSITION).Select(x => x.ReverseZ()).ToArray());
}
if (primTarget.NORMAL != -1)
{
blendShape.Normals.AddRange(
gltf.GetArrayFromAccessor <Vector3>(primTarget.NORMAL).Select(x => x.ReverseZ()).ToArray());
}
if (primTarget.TANGENT != -1)
{
blendShape.Tangents.AddRange(
gltf.GetArrayFromAccessor <Vector3>(primTarget.TANGENT).Select(x => x.ReverseZ()).ToArray());
}
}
}
}
foreach (var prim in gltfMesh.primitives)
{
var indices = gltf.GetIndices(prim.indices).Select(x => x).ToArray();
subMeshes.Add(indices);
// material
materialIndices.Add(prim.material);
}
}
else
{
// multiple submMesh is not sharing a VertexBuffer.
// each subMesh use a independent VertexBuffer.
var targets = gltfMesh.primitives[0].targets;
for (int i = 1; i < gltfMesh.primitives.Count; ++i)
{
if (!gltfMesh.primitives[i].targets.SequenceEqual(targets))
{
throw new NotImplementedException(string.Format("diffirent targets: {0} with {1}",
gltfMesh.primitives[i],
targets));
}
}
foreach (var prim in gltfMesh.primitives)
{
var indexOffset = positions.Count;
var indexBuffer = prim.indices;
var positionCount = positions.Count;
positions.AddRange(gltf.GetArrayFromAccessor <Vector3>(prim.attributes.POSITION).Select(x => x.ReverseZ()));
positionCount = positions.Count - positionCount;
// normal
if (prim.attributes.NORMAL != -1)
{
normals.AddRange(gltf.GetArrayFromAccessor <Vector3>(prim.attributes.NORMAL).Select(x => x.ReverseZ()));
}
if (prim.attributes.TANGENT != -1)
{
tangents.AddRange(gltf.GetArrayFromAccessor <Vector4>(prim.attributes.TANGENT).Select(x => x.ReverseZ()));
}
// vertex color
if (prim.attributes.COLOR_0 != -1)
{
colors.AddRange(gltf.GetArrayFromAccessor <Vector4>(prim.attributes.COLOR_0));
}
// uv
if (prim.attributes.TEXCOORD_0 != -1)
{
uv.AddRange(gltf.GetArrayFromAccessor <Vector2>(prim.attributes.TEXCOORD_0).Select(x => x.ReverseY()));
}
else
{
// for inconsistent attributes in primitives
uv.AddRange(new Vector2[positionCount]);
}
// skin
if (prim.attributes.JOINTS_0 != -1 && prim.attributes.WEIGHTS_0 != -1)
{
var joints0 = gltf.GetArrayFromAccessor <UShort4>(prim.attributes.JOINTS_0); // uint4
var weights0 = gltf.GetArrayFromAccessor <Float4>(prim.attributes.WEIGHTS_0).Select(x => x.One()).ToArray();
for (int j = 0; j < joints0.Length; ++j)
{
var bw = new BoneWeight();
bw.boneIndex0 = joints0[j].x;
bw.weight0 = weights0[j].x;
bw.boneIndex1 = joints0[j].y;
bw.weight1 = weights0[j].y;
bw.boneIndex2 = joints0[j].z;
bw.weight2 = weights0[j].z;
bw.boneIndex3 = joints0[j].w;
bw.weight3 = weights0[j].w;
boneWeights.Add(bw);
}
}
// blendshape
if (prim.targets != null && prim.targets.Count > 0)
{
if (blendShapes == null)
{
blendShapes = prim.targets.Select((x, i) => new BlendShape(i.ToString())).ToArray();
}
for (int i = 0; i < prim.targets.Count; ++i)
{
//var name = string.Format("target{0}", i++);
var primTarget = prim.targets[i];
var blendShape = blendShapes[i];
if (primTarget.POSITION != -1)
{
blendShape.Positions.AddRange(
gltf.GetArrayFromAccessor <Vector3>(primTarget.POSITION).Select(x => x.ReverseZ()).ToArray());
}
if (primTarget.NORMAL != -1)
{
blendShape.Normals.AddRange(
gltf.GetArrayFromAccessor <Vector3>(primTarget.NORMAL).Select(x => x.ReverseZ()).ToArray());
}
if (primTarget.TANGENT != -1)
{
blendShape.Tangents.AddRange(
gltf.GetArrayFromAccessor <Vector3>(primTarget.TANGENT).Select(x => x.ReverseZ()).ToArray());
}
}
}
var indices =
(indexBuffer >= 0)
? gltf.GetIndices(indexBuffer).Select(x => x + indexOffset).ToArray()
: TriangleUtil.FlipTriangle(Enumerable.Range(0, positions.Count)).ToArray() // without index array
;
subMeshes.Add(indices);
// material
materialIndices.Add(prim.material);
}
}
if (!materialIndices.Any())
{
materialIndices.Add(0);
}
//Debug.Log(prims.ToJson());
var mesh = new Mesh();
mesh.name = gltfMesh.name;
if (positions.Count > UInt16.MaxValue)
{
#if UNITY_2017_3_OR_NEWER
mesh.indexFormat = UnityEngine.Rendering.IndexFormat.UInt32;
#else
Debug.LogWarningFormat("vertices {0} exceed 65535. not implemented. Unity2017.3 supports large mesh", positions.Count);
#endif
}
mesh.vertices = positions.ToArray();
if (normals.Any())
{
mesh.normals = normals.ToArray();
}
else
{
mesh.RecalculateNormals();
}
if (tangents.Any())
{
mesh.tangents = tangents.ToArray();
}
else
{
mesh.RecalculateTangents();
}
if (colors.Any())
{
mesh.colors = colors.ConvertAll(x => new Color(x.x, x.y, x.z, 1f)).ToArray();
}
if (uv.Any())
{
mesh.uv = uv.ToArray();
}
if (boneWeights.Any())
{
mesh.boneWeights = boneWeights.ToArray();
}
mesh.subMeshCount = subMeshes.Count;
for (int i = 0; i < subMeshes.Count; ++i)
{
mesh.SetTriangles(subMeshes[i], i);
}
var result = new MeshWithMaterials
{
Mesh = mesh,
Materials = materialIndices.Select(x => materials[x]).ToArray()
};
List <Material> matList = result.Materials.ToList();
matList.RemoveAll(x => x == null);
result.Materials = matList.ToArray();
if (blendShapes != null)
{
foreach (var blendShape in blendShapes)
{
if (blendShape.Positions.Count > 0)
{
if (blendShape.Positions.Count == mesh.vertexCount)
{
mesh.AddBlendShapeFrame(blendShape.Name, FRAME_WEIGHT,
blendShape.Positions.ToArray(),
normals.Count == mesh.vertexCount ? blendShape.Normals.ToArray() : null,
null
);
}
else
{
Debug.LogWarningFormat("May be partial primitive has blendShape. Rquire separete mesh or extend blend shape, but not implemented: {0}", blendShape.Name);
}
}
}
}
return(result);
}
public static GameObject Import(IImporterContext ctx, string json,
ArraySegment <Byte> glbBinChunk,
OnLoadCallback callback = null,
GetBlendShapeName getBlendShapeName = null,
CreateMaterialFunc createMaterial = null
)
{
if (getBlendShapeName == null)
{
getBlendShapeName = DefaultGetBlendShapeName;
}
// exclude not gltf-2.0
var parsed = json.ParseAsJson();
try
{
if (parsed["asset"]["version"].GetString() != "2.0")
{
Debug.LogWarningFormat("is not gltf-2.0: {0}", ctx.Path);
return(null);
}
}
catch (Exception)
{
Debug.LogWarningFormat("{0}: fail to parse json", ctx.Path);
return(null);
}
// parse json
glTF gltf = null;
try
{
gltf = JsonUtility.FromJson <glTF>(json);
}
catch (Exception)
{
Debug.LogWarningFormat("{0}: fail to parse json", ctx.Path);
return(null);
}
if (gltf == null)
{
Debug.LogWarningFormat("{0}: fail to parse json", ctx.Path);
return(null);
}
if (gltf.asset.version != "2.0")
{
Debug.LogWarningFormat("unknown gltf version {0}", gltf.asset.version);
return(null);
}
gltf.baseDir = Path.GetDirectoryName(ctx.Path);
//Debug.LogFormat("{0}: {1}", ctx.Path, gltf);
foreach (var buffer in gltf.buffers)
{
buffer.OpenStorage(gltf.baseDir, glbBinChunk);
}
// textures
var textures = ImportTextures(gltf)
.Select(x =>
{
var samplerIndex = gltf.textures[x.TextureIndex].sampler;
var sampler = gltf.samplers[samplerIndex];
if (x.Texture == null)
{
Debug.LogWarningFormat("May be import order, not yet texture is not imported. Later, manualy reimport {0}", ctx.Path);
}
else
{
SetSampler(x.Texture, sampler);
if (!x.IsAsset)
{
ctx.AddObjectToAsset(x.Texture.name, x.Texture);
}
}
return(x);
})
.ToArray();
if (createMaterial == null)
{
createMaterial = CreateMaterialFuncFromShader(Shader.Find("Standard"));
}
// materials
List <Material> materials = new List <Material>();
if (gltf.materials == null || !gltf.materials.Any())
{
materials.Add(createMaterial(ctx, 0, null, textures));
}
else
{
for (int i = 0; i < gltf.materials.Count; ++i)
{
Material mat = null;
// [Maquette Code]
if (Maquette.Unity.MqAddonUtility.NeedsMaquetteMaterial(gltf.materials[i].name))
{
string materialName = gltf.materials[i].name;
materialName = materialName.Replace(" (Instance)", "");
mat = Maquette.Unity.MqAddonUtility.CreateMaquetteMaterial(materialName);
if (gltf.materials[i].pbrMetallicRoughness.baseColorTexture != null)
{
int baseTextureIndex = gltf.materials[i].pbrMetallicRoughness.baseColorTexture.index;
if (baseTextureIndex >= 0 && baseTextureIndex < textures.Length)
{
var texture = textures[baseTextureIndex];
mat.mainTexture = texture.Texture;
}
}
}
else
{
mat = createMaterial(ctx, i, gltf.materials[i], textures);
}
materials.Add(mat);
}
}
foreach (var material in materials)
{
if (material != null)
{
ctx.AddObjectToAsset(material.name, material);
}
}
// meshes
var meshes = gltf.meshes.Select((x, i) =>
{
var meshWithMaterials = ImportMesh(gltf, i, x, materials, getBlendShapeName);
var mesh = meshWithMaterials.Mesh;
if (string.IsNullOrEmpty(mesh.name))
{
mesh.name = string.Format("UniGLTF import#{0}", i);
}
ctx.AddObjectToAsset(mesh.name, mesh);
return(meshWithMaterials);
}).ToArray();
// nodes
var _nodes = gltf.nodes.Select(x => ImportNode(x)).ToArray();
var nodes = _nodes.Select((go, i) =>
{
if (string.IsNullOrEmpty(go.name))
{
go.name = string.Format("node{0:000}", i);
}
var nodeWithSkin = new TransformWithSkin
{
Transform = go.transform,
};
var node = gltf.nodes[i];
//
// build hierachy
//
if (node.children != null)
{
foreach (var child in node.children)
{
_nodes[child].transform.SetParent(_nodes[i].transform,
false // node has local transform
);
}
}
//
// attach mesh
//
if (node.mesh != -1)
{
var mesh = meshes[node.mesh];
if (mesh.Mesh.blendShapeCount == 0 && node.skin == -1)
{
// without blendshape and bone skinning
var filter = go.AddComponent <MeshFilter>();
filter.sharedMesh = mesh.Mesh;
var renderer = go.AddComponent <MeshRenderer>();
renderer.sharedMaterials = mesh.Materials;
}
else
{
var renderer = go.AddComponent <SkinnedMeshRenderer>();
if (node.skin != -1)
{
nodeWithSkin.SkinIndex = node.skin;
}
renderer.sharedMesh = mesh.Mesh;
renderer.sharedMaterials = mesh.Materials;
}
}
return(nodeWithSkin);
}).ToArray();
//
// fix node's coordinate. z-back to z-forward
//
var globalTransformMap = nodes.ToDictionary(x => x.Transform, x => new PosRot
{
Position = x.Transform.position,
Rotation = x.Transform.rotation,
});
foreach (var x in gltf.rootnodes)
{
// fix nodes coordinate
// reverse Z in global
var t = nodes[x].Transform;
//t.SetParent(root.transform, false);
foreach (var transform in t.Traverse())
{
var g = globalTransformMap[transform];
transform.position = g.Position.ReverseZ();
transform.rotation = g.Rotation.ReverseZ();
}
}
// skinning
foreach (var x in nodes)
{
var skinnedMeshRenderer = x.Transform.GetComponent <SkinnedMeshRenderer>();
if (skinnedMeshRenderer != null)
{
var mesh = skinnedMeshRenderer.sharedMesh;
if (x.SkinIndex.HasValue)
{
if (mesh == null)
{
throw new Exception();
}
if (skinnedMeshRenderer == null)
{
throw new Exception();
}
if (x.SkinIndex.Value < gltf.skins.Count)
{
var skin = gltf.skins[x.SkinIndex.Value];
skinnedMeshRenderer.sharedMesh = null;
var joints = skin.joints.Select(y => nodes[y].Transform).ToArray();
skinnedMeshRenderer.bones = joints;
//skinnedMeshRenderer.rootBone = nodes[skin.skeleton].Transform;
if (skin.inverseBindMatrices != -1)
{
// BlendShape only ?
#if false
// https://docs.unity3d.com/ScriptReference/Mesh-bindposes.html
var hipsParent = nodes[0].Transform;
var calculatedBindPoses = joints.Select(y => y.worldToLocalMatrix * hipsParent.localToWorldMatrix).ToArray();
mesh.bindposes = calculatedBindPoses;
#else
var bindPoses = gltf.GetArrayFromAccessor <Matrix4x4>(skin.inverseBindMatrices)
.Select(y => y.ReverseZ())
.ToArray()
;
mesh.bindposes = bindPoses;
#endif
}
skinnedMeshRenderer.sharedMesh = mesh;
}
}
}
}
var root = new GameObject("_root_");
ctx.SetMainGameObject("root", root);
foreach (var x in gltf.rootnodes)
{
// fix nodes coordinate
// reverse Z in global
var t = nodes[x].Transform;
t.SetParent(root.transform, false);
}
// animation
if (gltf.animations != null && gltf.animations.Any())
{
var clip = new AnimationClip();
clip.name = ANIMATION_NAME;
clip.ClearCurves();
ImportAnimation(root.transform, clip, gltf.animations, nodes.Select(x => x.Transform).ToArray(), gltf);
clip.legacy = true;
clip.name = "legacy";
clip.wrapMode = WrapMode.Loop;
var animation = root.AddComponent <Animation>();
animation.clip = clip;
ctx.AddObjectToAsset(ANIMATION_NAME, clip);
}
if (callback != null)
{
callback(ctx, json,
nodes.Select(x => x.Transform).ToArray(),
meshes.Select(x => x.Mesh).ToList()
);
}
Debug.LogFormat("Import {0}", ctx.Path);
return(root);
}
