public SkinnedMeshRenderer SetupSkinnedRenderer(GameObject go, Mesh mesh, GLTFNode.ImportResult[] nodes)
{
SkinnedMeshRenderer smr = go.AddComponent <SkinnedMeshRenderer>();
Transform[] bones = new Transform[joints.Length];
for (int i = 0; i < bones.Length; i++)
{
int jointNodeIndex = joints[i];
GLTFNode.ImportResult jointNode = nodes[jointNodeIndex];
bones[i] = jointNode.transform;
if (string.IsNullOrEmpty(jointNode.transform.name))
{
jointNode.transform.name = "joint" + i;
}
}
smr.bones = bones;
smr.rootBone = bones[0];
// Bindposes
if (inverseBindMatrices != null)
{
if (inverseBindMatrices.Length != joints.Length)
{
Debug.LogWarning("InverseBindMatrices count and joints count not the same");
}
Matrix4x4 m = nodes[0].transform.localToWorldMatrix;
Matrix4x4[] bindPoses = new Matrix4x4[joints.Length];
for (int i = 0; i < joints.Length; i++)
{
bindPoses[i] = inverseBindMatrices[i];
}
mesh.bindposes = bindPoses;
}
else
{
Matrix4x4 m = nodes[0].transform.localToWorldMatrix;
Matrix4x4[] bindPoses = new Matrix4x4[joints.Length];
for (int i = 0; i < joints.Length; i++)
{
bindPoses[i] = nodes[joints[i]].transform.worldToLocalMatrix * m;
}
mesh.bindposes = bindPoses;
}
smr.sharedMesh = mesh;
return(smr);
}
public ImportResult Import(GLTFAccessor.ImportResult[] accessors, GLTFNode.ImportResult[] nodes, ImportSettings importSettings)
{
bool multiRoots = nodes.Where(x => x.IsRoot).Count() > 1;
ImportResult result = new ImportResult();
result.clip = new AnimationClip();
result.clip.name = name;
result.clip.frameRate = importSettings.animationSettings.frameRate;
result.clip.legacy = importSettings.animationSettings.useLegacyClips;
if (result.clip.legacy && importSettings.animationSettings.looping)
{
result.clip.wrapMode = WrapMode.Loop;
}
for (int i = 0; i < channels.Length; i++)
{
Channel channel = channels[i];
if (samplers.Length <= channel.sampler)
{
Debug.LogWarning($"GLTFUtility: Animation channel points to sampler at index {channel.sampler} which doesn't exist. Skipping animation clip.");
continue;
}
Sampler sampler = samplers[channel.sampler];
// Get interpolation mode
InterpolationMode interpolationMode = importSettings.animationSettings.interpolationMode;
if (interpolationMode == InterpolationMode.ImportFromFile)
{
interpolationMode = sampler.interpolation;
}
if (interpolationMode == InterpolationMode.CUBICSPLINE)
{
Debug.LogWarning("Animation interpolation mode CUBICSPLINE not fully supported, result might look different.");
}
string relativePath = "";
GLTFNode.ImportResult node = nodes[channel.target.node.Value];
while (node != null && !node.IsRoot)
{
if (string.IsNullOrEmpty(relativePath))
{
relativePath = node.transform.name;
}
else
{
relativePath = node.transform.name + "/" + relativePath;
}
if (node.parent.HasValue)
{
node = nodes[node.parent.Value];
}
else
{
node = null;
}
}
// If file has multiple root nodes, a new parent will be created for them as a final step of the import process. This parent f***s up the curve relative paths.
// Add node.transform.name to path if there are multiple roots. This is not the most elegant fix but it works.
// See GLTFNodeExtensions.GetRoot
if (multiRoots)
{
relativePath = node.transform.name + "/" + relativePath;
}
System.Threading.Thread.CurrentThread.CurrentCulture = System.Globalization.CultureInfo.InvariantCulture;
float[] keyframeInput = accessors[sampler.input].ReadFloat().ToArray();
switch (channel.target.path)
{
case "translation":
Vector3[] pos = accessors[sampler.output].ReadVec3().ToArray();
AnimationCurve posX = new AnimationCurve();
AnimationCurve posY = new AnimationCurve();
AnimationCurve posZ = new AnimationCurve();
for (int k = 0; k < keyframeInput.Length; k++)
{
posX.AddKey(CreateKeyframe(k, keyframeInput, pos, x => - x.x, interpolationMode));
posY.AddKey(CreateKeyframe(k, keyframeInput, pos, x => x.y, interpolationMode));
posZ.AddKey(CreateKeyframe(k, keyframeInput, pos, x => x.z, interpolationMode));
}
result.clip.SetCurve(relativePath, typeof(Transform), "localPosition.x", posX);
result.clip.SetCurve(relativePath, typeof(Transform), "localPosition.y", posY);
result.clip.SetCurve(relativePath, typeof(Transform), "localPosition.z", posZ);
break;
case "rotation":
Vector4[] rot = accessors[sampler.output].ReadVec4().ToArray();
AnimationCurve rotX = new AnimationCurve();
AnimationCurve rotY = new AnimationCurve();
AnimationCurve rotZ = new AnimationCurve();
AnimationCurve rotW = new AnimationCurve();
for (int k = 0; k < keyframeInput.Length; k++)
{
// The Animation window in Unity shows keyframes incorrectly converted to euler. This is only to deceive you. The quaternions underneath work correctly
rotX.AddKey(CreateKeyframe(k, keyframeInput, rot, x => x.x, interpolationMode));
rotY.AddKey(CreateKeyframe(k, keyframeInput, rot, x => - x.y, interpolationMode));
rotZ.AddKey(CreateKeyframe(k, keyframeInput, rot, x => - x.z, interpolationMode));
rotW.AddKey(CreateKeyframe(k, keyframeInput, rot, x => x.w, interpolationMode));
}
result.clip.SetCurve(relativePath, typeof(Transform), "localRotation.x", rotX);
result.clip.SetCurve(relativePath, typeof(Transform), "localRotation.y", rotY);
result.clip.SetCurve(relativePath, typeof(Transform), "localRotation.z", rotZ);
result.clip.SetCurve(relativePath, typeof(Transform), "localRotation.w", rotW);
break;
case "scale":
Vector3[] scale = accessors[sampler.output].ReadVec3().ToArray();
AnimationCurve scaleX = new AnimationCurve();
AnimationCurve scaleY = new AnimationCurve();
AnimationCurve scaleZ = new AnimationCurve();
for (int k = 0; k < keyframeInput.Length; k++)
{
scaleX.AddKey(CreateKeyframe(k, keyframeInput, scale, x => x.x, interpolationMode));
scaleY.AddKey(CreateKeyframe(k, keyframeInput, scale, x => x.y, interpolationMode));
scaleZ.AddKey(CreateKeyframe(k, keyframeInput, scale, x => x.z, interpolationMode));
}
result.clip.SetCurve(relativePath, typeof(Transform), "localScale.x", scaleX);
result.clip.SetCurve(relativePath, typeof(Transform), "localScale.y", scaleY);
result.clip.SetCurve(relativePath, typeof(Transform), "localScale.z", scaleZ);
break;
case "weights":
GLTFNode.ImportResult skinnedMeshNode = nodes[channel.target.node.Value];
SkinnedMeshRenderer skinnedMeshRenderer = skinnedMeshNode.transform.GetComponent <SkinnedMeshRenderer>();
int numberOfBlendShapes = skinnedMeshRenderer.sharedMesh.blendShapeCount;
AnimationCurve[] blendShapeCurves = new AnimationCurve[numberOfBlendShapes];
for (int j = 0; j < numberOfBlendShapes; ++j)
{
blendShapeCurves[j] = new AnimationCurve();
}
float[] weights = accessors[sampler.output].ReadFloat().ToArray();
float[] weightValues = new float[keyframeInput.Length];
float[] previouslyKeyedValues = new float[numberOfBlendShapes];
// Reference for my future self:
// keyframeInput.Length = number of keyframes
// keyframeInput[ k ] = timestamp of keyframe
// weights.Length = number of keyframes * number of blendshapes
// weights[ j ] = actual animated weight of a specific blend shape
// (index into weights[] array accounts for keyframe index and blend shape index)
for (int k = 0; k < keyframeInput.Length; ++k)
{
for (int j = 0; j < numberOfBlendShapes; ++j)
{
int weightIndex = (k * numberOfBlendShapes) + j;
weightValues[k] = weights[weightIndex];
bool addKey = true;
if (importSettings.animationSettings.compressBlendShapeKeyFrames)
{
if (k == 0 || !Mathf.Approximately(weightValues[k], previouslyKeyedValues[j]))
{
if (k > 0)
{
weightValues[k - 1] = previouslyKeyedValues[j];
blendShapeCurves[j].AddKey(CreateKeyframe(k - 1, keyframeInput, weightValues, x => x, interpolationMode));
}
addKey = true;
previouslyKeyedValues[j] = weightValues[k];
}
else
{
addKey = false;
}
}
if (addKey)
{
blendShapeCurves[j].AddKey(CreateKeyframe(k, keyframeInput, weightValues, x => x, interpolationMode));
}
}
}
for (int j = 0; j < numberOfBlendShapes; ++j)
{
string propertyName = "blendShape." + skinnedMeshRenderer.sharedMesh.GetBlendShapeName(j);
result.clip.SetCurve(relativePath, typeof(SkinnedMeshRenderer), propertyName, blendShapeCurves[j]);
}
break;
}
}
return(result);
}
public override IEnumerator OnCoroutine(Action <float> onProgress = null)
{
// No nodes
if (nodes == null)
{
if (onProgress != null)
{
onProgress.Invoke(1f);
}
IsCompleted = true;
yield break;
}
Result = new ImportResult[nodes.Count];
// Initialize transforms
for (int i = 0; i < Result.Length; i++)
{
Result[i] = new GLTFNode.ImportResult();
Result[i].transform = new GameObject().transform;
Result[i].transform.name = nodes[i].name;
}
// Set up hierarchy
for (int i = 0; i < Result.Length; i++)
{
if (nodes[i].children != null)
{
int[] children = nodes[i].children;
Result[i].children = children;
for (int k = 0; k < children.Length; k++)
{
int childIndex = children[k];
Result[childIndex].parent = i;
Result[childIndex].transform.parent = Result[i].transform;
}
}
}
// Apply TRS
for (int i = 0; i < Result.Length; i++)
{
nodes[i].ApplyTRS(Result[i].transform);
}
// Setup components
for (int i = 0; i < Result.Length; i++)
{
// Setup mesh
if (nodes[i].mesh.HasValue)
{
GLTFMesh.ImportResult meshResult = meshTask.Result[nodes[i].mesh.Value];
if (meshResult == null)
{
continue;
}
Mesh mesh = meshResult.mesh;
Renderer renderer;
if (nodes[i].skin.HasValue)
{
GLTFSkin.ImportResult skin = skinTask.Result[nodes[i].skin.Value];
renderer = skin.SetupSkinnedRenderer(Result[i].transform.gameObject, mesh, Result);
}
else if (mesh.blendShapeCount > 0)
{
// Blend shapes require skinned mesh renderer
SkinnedMeshRenderer mr = Result[i].transform.gameObject.AddComponent <SkinnedMeshRenderer>();
mr.sharedMesh = mesh;
renderer = mr;
}
else
{
MeshRenderer mr = Result[i].transform.gameObject.AddComponent <MeshRenderer>();
MeshFilter mf = Result[i].transform.gameObject.AddComponent <MeshFilter>();
renderer = mr;
mf.sharedMesh = mesh;
}
//Materials
renderer.materials = meshResult.materials;
if (string.IsNullOrEmpty(Result[i].transform.name))
{
Result[i].transform.name = "node" + i;
}
}
else
{
if (string.IsNullOrEmpty(Result[i].transform.name))
{
Result[i].transform.name = "node" + i;
}
}
// Setup camera
if (nodes[i].camera.HasValue)
{
GLTFCamera cameraData = cameras[nodes[i].camera.Value];
Camera camera = Result[i].transform.gameObject.AddComponent <Camera>();
Result[i].transform.localRotation = Result[i].transform.localRotation * Quaternion.Euler(0, 180, 0);
if (cameraData.type == CameraType.orthographic)
{
camera.orthographic = true;
camera.nearClipPlane = cameraData.orthographic.znear;
camera.farClipPlane = cameraData.orthographic.zfar;
camera.orthographicSize = cameraData.orthographic.ymag;
}
else
{
camera.orthographic = false;
camera.nearClipPlane = cameraData.perspective.znear;
if (cameraData.perspective.zfar.HasValue)
{
camera.farClipPlane = cameraData.perspective.zfar.Value;
}
if (cameraData.perspective.aspectRatio.HasValue)
{
camera.aspect = cameraData.perspective.aspectRatio.Value;
}
camera.fieldOfView = Mathf.Rad2Deg * cameraData.perspective.yfov;
}
}
}
IsCompleted = true;
}