public override AnimationFrame BlendWith(AnimationFrame otherAnim, double amount)
{
if (!(otherAnim is AnimationFilledGradientRectangle))
{
throw new FormatException("Cannot blend with another type");
}
amount = GetTransitionValue(amount);
RectangleF newrect = new RectangleF((float)CalculateNewValue(_dimension.X, otherAnim._dimension.X, amount),
(float)CalculateNewValue(_dimension.Y, otherAnim._dimension.Y, amount),
(float)CalculateNewValue(_dimension.Width, otherAnim._dimension.Width, amount),
(float)CalculateNewValue(_dimension.Height, otherAnim._dimension.Height, amount)
);
float newAngle = (float)CalculateNewValue(_angle, otherAnim._angle, amount);
return(new AnimationFilledGradientRectangle(newrect, _gradientBrush.BlendEffectBrush((otherAnim as AnimationFilledGradientRectangle)._gradientBrush, amount)).SetAngle(newAngle));
}
