private static List <STKeyFrame> ParseKeyFrames(JsonReader reader, STInterpoaltionType type)
{
if (type == STInterpoaltionType.Constant)
{
return(new List <STKeyFrame>());
}
List <STKeyFrame> keyFrames = new List <STKeyFrame>();
while (reader.Read())
{
if (reader.TokenType == JsonToken.EndObject)
{
break;
}
if (reader.Value == null)
{
continue;
}
if (reader.Value.Equals("Frame"))
{
if (type == STInterpoaltionType.Bezier)
{
STBezierKeyFrame keyFrame = new STBezierKeyFrame();
keyFrame.Frame = (float)reader.ReadAsDecimal();
reader.Read(); //Value
keyFrame.Value = (float)reader.ReadAsDecimal();
reader.Read(); //in
keyFrame.SlopeIn = (float)reader.ReadAsDecimal();
reader.Read(); //out
keyFrame.SlopeOut = (float)reader.ReadAsDecimal();
keyFrames.Add(keyFrame);
}
else
{
STKeyFrame keyFrame = new STKeyFrame();
keyFrame.Frame = (float)reader.ReadAsDecimal();
reader.Read(); //Value
keyFrame.Value = (float)reader.ReadAsDecimal();
keyFrames.Add(keyFrame);
}
}
}
return(keyFrames);
}
public override float GetFrameValue(float frame, float startFrame = 0)
{
if (InterpolationType == STInterpoaltionType.Constant)
{
return(Constant);
}
if (KeyFrames.Count == 0)
{
return(0);
}
if (KeyFrames.Count == 1)
{
return(KeyFrames[0].Value);
}
STKeyFrame LK = KeyFrames.First();
STKeyFrame RK = KeyFrames.Last();
float Frame = frame - startFrame;
foreach (STKeyFrame keyFrame in KeyFrames)
{
if (keyFrame.Frame <= Frame)
{
LK = keyFrame;
}
if (keyFrame.Frame >= Frame && keyFrame.Frame < RK.Frame)
{
RK = keyFrame;
}
}
if (LK.Frame != RK.Frame)
{
float FrameDiff = Frame - LK.Frame;
float Weight = FrameDiff / (RK.Frame - LK.Frame);
switch (InterpolationType)
{
case STInterpoaltionType.Constant: return(LK.Value);
case STInterpoaltionType.Step: return(LK.Value);
case STInterpoaltionType.Linear: return(InterpolationHelper.Lerp(LK.Value, RK.Value, Weight));
case STInterpoaltionType.Bezier:
{
return(InterpolationHelper.Lerp(LK.Value, RK.Value, Weight));
STBezierKeyFrame bezierKeyLK = (STBezierKeyFrame)LK;
STBezierKeyFrame bezierKeyRK = (STBezierKeyFrame)RK;
float length = RK.Frame - LK.Frame;
return(InterpolationHelper.BezierInterpolate(frame,
bezierKeyLK.Frame,
bezierKeyRK.Frame,
bezierKeyLK.SlopeIn,
bezierKeyRK.SlopeOut,
bezierKeyLK.Value,
bezierKeyRK.Value));
}
case STInterpoaltionType.Hermite:
{
STHermiteKeyFrame hermiteKeyLK = (STHermiteKeyFrame)LK;
STHermiteKeyFrame hermiteKeyRK = (STHermiteKeyFrame)RK;
float length = RK.Frame - LK.Frame;
return(InterpolationHelper.HermiteInterpolate(frame,
hermiteKeyLK.Frame,
hermiteKeyRK.Frame,
hermiteKeyLK.TangentIn,
hermiteKeyLK.TangentOut,
hermiteKeyLK.Value,
hermiteKeyRK.Value));
}
}
}
return(LK.Value);
}
