/// <summary>
/// Exports all animation
/// </summary>
private void ExportAnimationClip(AnimationClip unityAnimClip, GameObject unityRoot, FbxScene fbxScene)
{
if (unityAnimClip == null)
{
return;
}
// setup anim stack
FbxAnimStack fbxAnimStack = FbxAnimStack.Create(fbxScene, unityAnimClip.name);
fbxAnimStack.Description.Set("Animation Take: " + unityAnimClip.name);
// add one mandatory animation layer
FbxAnimLayer fbxAnimLayer = FbxAnimLayer.Create(fbxScene, "Animation Base Layer");
fbxAnimStack.AddMember(fbxAnimLayer);
// Set up the FPS so our frame-relative math later works out
// Custom frame rate isn't really supported in FBX SDK (there's
// a bug), so try hard to find the nearest time mode.
FbxTime.EMode timeMode = FbxTime.EMode.eCustom;
double precision = 1e-6;
while (timeMode == FbxTime.EMode.eCustom && precision < 1000)
{
timeMode = FbxTime.ConvertFrameRateToTimeMode(unityAnimClip.frameRate, precision);
precision *= 10;
}
if (timeMode == FbxTime.EMode.eCustom)
{
timeMode = FbxTime.EMode.eFrames30;
}
FbxTime.SetGlobalTimeMode(timeMode);
// set time correctly
var fbxStartTime = FbxTime.FromSecondDouble(0);
var fbxStopTime = FbxTime.FromSecondDouble(unityAnimClip.length);
fbxAnimStack.SetLocalTimeSpan(new FbxTimeSpan(fbxStartTime, fbxStopTime));
foreach (EditorCurveBinding unityCurveBinding in AnimationUtility.GetCurveBindings(unityAnimClip))
{
Object unityObj = AnimationUtility.GetAnimatedObject(unityRoot, unityCurveBinding);
if (!unityObj)
{
continue;
}
AnimationCurve unityAnimCurve = AnimationUtility.GetEditorCurve(unityAnimClip, unityCurveBinding);
if (unityAnimCurve == null)
{
continue;
}
ExportAnimCurve(unityObj, unityAnimCurve, unityCurveBinding.propertyName, fbxAnimLayer);
}
}
/// <summary>
/// Export an AnimationClip as a single take
/// </summary>
protected void ExportAnimationClip(AnimationClip unityAnimClip, GameObject unityRoot, FbxScene fbxScene)
{
if (Verbose)
{
Debug.Log(string.Format("exporting clip {1} for {0}", unityRoot.name, unityAnimClip.name));
}
// setup anim stack
FbxAnimStack fbxAnimStack = FbxAnimStack.Create(fbxScene, unityAnimClip.name);
fbxAnimStack.Description.Set("Animation Take: " + unityAnimClip.name);
// add one mandatory animation layer
FbxAnimLayer fbxAnimLayer = FbxAnimLayer.Create(fbxScene, "Animation Base Layer");
fbxAnimStack.AddMember(fbxAnimLayer);
// Set up the FPS so our frame-relative math later works out
// Custom frame rate isn't really supported in FBX SDK (there's
// a bug), so try hard to find the nearest time mode.
FbxTime.EMode timeMode = FbxTime.EMode.eCustom;
double precision = 1e-6;
while (timeMode == FbxTime.EMode.eCustom && precision < 1000)
{
timeMode = FbxTime.ConvertFrameRateToTimeMode(unityAnimClip.frameRate, precision);
precision *= 10;
}
if (timeMode == FbxTime.EMode.eCustom)
{
timeMode = FbxTime.EMode.eFrames30;
}
FbxTime.SetGlobalTimeMode(timeMode);
// set time correctly
var fbxStartTime = FbxTime.FromSecondDouble(0);
var fbxStopTime = FbxTime.FromSecondDouble(unityAnimClip.length);
fbxAnimStack.SetLocalTimeSpan(new FbxTimeSpan(fbxStartTime, fbxStopTime));
/* The major difficulty: Unity uses quaternions for rotation
* (which is how it should be) but FBX uses euler angles. So we
* need to gather up the list of transform curves per object. */
var quaternions = new Dictionary <UnityEngine.GameObject, QuaternionCurve> ();
foreach (EditorCurveBinding unityCurveBinding in AnimationUtility.GetCurveBindings(unityAnimClip))
{
Object unityObj = AnimationUtility.GetAnimatedObject(unityRoot, unityCurveBinding);
if (!unityObj)
{
continue;
}
AnimationCurve unityAnimCurve = AnimationUtility.GetEditorCurve(unityAnimClip, unityCurveBinding);
if (unityAnimCurve == null)
{
continue;
}
int index = QuaternionCurve.GetQuaternionIndex(unityCurveBinding.propertyName);
if (index == -1)
{
if (Verbose)
{
Debug.Log(string.Format("export binding {1} for {0}", unityCurveBinding.propertyName, unityObj.ToString()));
}
/* Some normal property (e.g. translation), export right away */
ExportAnimCurve(unityObj, unityAnimCurve, unityCurveBinding.propertyName,
fbxScene, fbxAnimLayer);
}
else
{
/* Rotation property; save it to convert quaternion -> euler later. */
var unityGo = GetGameObject(unityObj);
if (!unityGo)
{
continue;
}
QuaternionCurve quat;
if (!quaternions.TryGetValue(unityGo, out quat))
{
quat = new QuaternionCurve();
quaternions.Add(unityGo, quat);
}
quat.SetCurve(index, unityAnimCurve);
}
}
/* now export all the quaternion curves */
foreach (var kvp in quaternions)
{
var unityGo = kvp.Key;
var quat = kvp.Value;
FbxNode fbxNode;
if (!MapUnityObjectToFbxNode.TryGetValue(unityGo, out fbxNode))
{
Debug.LogError(string.Format("no fbxnode found for '0'", unityGo.name));
continue;
}
quat.Animate(unityGo.transform, fbxNode, fbxAnimLayer, Verbose);
}
}