public float CurveValue(KeyProperty prev, KeyProperty next, int frame, int prevFrame, int nextFrame)
{
Vector2 A = new Vector2(prevFrame, prev.value);
Vector2 D = new Vector2(nextFrame, next.value);
Vector2 B = A + new Vector2(prev.outTanX, prev.outTanY);
Vector2 C = D - new Vector2(next.inTanX, next.inTanY);
return(Bezier.EvaluateBezier(A, B, C, D, frame));
}
public static KeyFrame GetKey(AnimationSet set, int frame)
{
KeyProperty px = GetProperty(set, AnimatableProperty.PositionX, frame);
KeyProperty py = GetProperty(set, AnimatableProperty.PositionY, frame);
KeyProperty pz = GetProperty(set, AnimatableProperty.PositionZ, frame);
KeyProperty rx = GetProperty(set, AnimatableProperty.RotationX, frame);
KeyProperty ry = GetProperty(set, AnimatableProperty.RotationY, frame);
KeyProperty rz = GetProperty(set, AnimatableProperty.RotationZ, frame);
return(new KeyFrame()
{
frame = frame,
posX = px,
posY = py,
posZ = pz,
rotX = rx,
rotY = ry,
rotZ = rz
});
}
private static KeyProperty GetProperty(AnimationSet set, AnimatableProperty property, int frame)
{
Curve curve = set.GetCurve(property);
if (curve.GetKeyIndex(frame, out int index))
{
KeyProperty key = new KeyProperty()
{
value = curve.keys[index].value,
inTanX = curve.keys[index].inTangent.x,
inTanY = curve.keys[index].inTangent.y,
outTanX = curve.keys[index].outTangent.x,
outTanY = curve.keys[index].outTangent.y
};
return(key);
}
else
{
KeyProperty key = new KeyProperty();
return(key);
}
}
