private void UpdateTimer(object sender, EventArgs e)
{
if (Mode == AnimationMode.Spin)
{
if (MoveMultiplier < 1.0f)
{
MoveMultiplier += _moveAcceleration;
}
else
{
MoveMultiplier = 1.0f;
}
}
else if (Mode != AnimationMode.Idle)
{
_autoMoveCurrent += _autoMoveStep;
// Allow timer to overflow for 2 subsequent frames, so we
// get finalizing 1.0 value at all times
if (_autoMoveCurrent >= 1.0f + (_autoMoveStep * 2))
{
Stop(true);
}
else
{
var newMultiplier = MathC.SmoothStep(0.0, 1.0, _autoMoveCurrent);
MoveMultiplier = (float)MathC.Clamp(newMultiplier, 0.0, 1.0);
}
}
else
{
Stop(true);
}
}
public void UpdateTransform(int meshIndex, Vector3 newRot, Vector3 newPos)
{
if (CurrentAnim == null || CurrentKeyFrame == null)
{
return;
}
// Backup everything and push undo on first occurence of editing
if (!MadeChanges || _backupPos.Count == 0 || _backupRot.Count == 0)
{
_initialPos = CurrentKeyFrame.Translations[0];
_initialRot = CurrentKeyFrame.Rotations[meshIndex];
_backupPos.Clear();
_backupRot.Clear();
ActiveFrames.ForEach(f => { _backupRot.Add(f.Rotations[meshIndex]); _backupPos.Add(f.Translations[0]); });
Tool.UndoManager.PushAnimationChanged(this, CurrentAnim);
MadeChanges = true;
}
// Calculate deltas for other frames processing
var deltaPos = newPos - _initialPos;
var deltaRot = newRot - _initialRot;
// Define animation properties
bool evolve = TransformMode != AnimTransformMode.Simple && ActiveFrames.Count > 1;
bool smooth = TransformMode == AnimTransformMode.Smooth || TransformMode == AnimTransformMode.SmoothReverse || TransformMode == AnimTransformMode.Symmetric;
bool reverse = TransformMode == AnimTransformMode.LinearReverse || TransformMode == AnimTransformMode.SmoothReverse;
bool loop = TransformMode == AnimTransformMode.Symmetric || TransformMode == AnimTransformMode.SymmetricLinear;
// Calculate evolution
float frameCount = loop || reverse ? Selection.Y - Selection.X : CurrentFrameIndex - Selection.X;
float currentStep = 0;
int index = 0;
foreach (var keyframe in ActiveFrames)
{
float midFrame = loop ? CurrentFrameIndex - Selection.X : (reverse ? CurrentFrameIndex : frameCount);
float bias = (currentStep <= midFrame) ? (reverse ? 1.0f : currentStep / midFrame) : (frameCount - currentStep) / (frameCount - midFrame);
// Single-pass smoothstep doesn't look organic on fast animations, hence we're using 2-pass smootherstep here.
float weight = smooth ? (float)MathC.SmoothStep(0, 1, MathC.SmoothStep(0, 1, bias)) : bias;
// Apply deltas to backed-up transforms
var currPos = _backupPos[index] + deltaPos;
var currRot = _backupRot[index] + deltaRot;
var translationVector = currPos;
if (evolve)
{
translationVector = Vector3.Lerp(_backupPos[index], translationVector, weight);
}
// Foolproof stuff in case user hardly messes with transform during playback...
if (float.IsNaN(translationVector.X))
{
translationVector.X = _backupPos[index].X;
}
if (float.IsNaN(translationVector.Y))
{
translationVector.Y = _backupPos[index].Y;
}
if (float.IsNaN(translationVector.Z))
{
translationVector.Z = _backupPos[index].Z;
}
keyframe.Translations[0] = translationVector;
keyframe.TranslationsMatrices[0] = Matrix4x4.CreateTranslation(translationVector);
var rotVector = currRot;
Quaternion finalQuat;
if (evolve)
{
// Calculate source and destination quats and decide on direction based on dot product.
var srcQuat = Quaternion.CreateFromYawPitchRoll(_backupRot[index].Y, _backupRot[index].X, _backupRot[index].Z);
var destQuat = Quaternion.CreateFromYawPitchRoll(currRot.Y, currRot.X, currRot.Z);
if (Quaternion.Dot(srcQuat, destQuat) < 0)
{
Quaternion.Negate(srcQuat);
}
finalQuat = Quaternion.Lerp(srcQuat, destQuat, weight);
}
else
{
finalQuat = Quaternion.CreateFromYawPitchRoll(rotVector.Y, rotVector.X, rotVector.Z);
}
// We're not converting quat to rotations because we have to check-up for NaNs
var rotationVector = MathC.QuaternionToEuler(finalQuat);
// Foolproof stuff in case user hardly messes with transform during playback...
if (float.IsNaN(rotationVector.X))
{
rotationVector.X = _backupRot[index].X;
}
if (float.IsNaN(rotationVector.Y))
{
rotationVector.Y = _backupRot[index].Y;
}
if (float.IsNaN(rotationVector.Z))
{
rotationVector.Z = _backupRot[index].Z;
}
// NaNs filtered out, now we can put actual data.
keyframe.Quaternions[meshIndex] = Quaternion.CreateFromYawPitchRoll(rotationVector.Y, rotationVector.X, rotationVector.Z);
keyframe.Rotations[meshIndex] = rotationVector;
index++;
currentStep++; if (currentStep > frameCount)
{
currentStep = frameCount;
}
}
}