private void UpdateAnimation()
{
FVector playerVelocity = GetVelocity();
float playerSpeedSqr = playerVelocity.SizeSquared();
// Are we moving or standing still?
UPaperFlipbook desiredAnimation = playerSpeedSqr > 0.0f ? RunningAnimation : IdleAnimation;
if (Sprite.GetFlipbook() != desiredAnimation)
{
Sprite.SetFlipbook(desiredAnimation);
}
}
/// <summary>
/// Interpolate vector from Current to Target. Scaled by distance to Target, so it has a strong start speed and ease out.
/// </summary>
public static FVector VInterpTo(FVector current, FVector target, float deltaTime, float interpSpeed)
{
// If no interp speed, jump to target value
if (interpSpeed <= 0.0f)
{
return(target);
}
// Distance to reach
FVector dist = target - current;
// If distance is too small, just set the desired location
if (dist.SizeSquared() < KindaSmallNumber)
{
return(target);
}
// Delta Move, Clamp so we do not over shoot.
FVector deltaMove = dist * FMath.Clamp(deltaTime * interpSpeed, 0.0f, 1.0f);
return(current + deltaMove);
}
/// <summary>
/// Generates the 'smallest' (geodesic) rotation between two vectors of arbitrary length.
/// </summary>
public static FQuat FindBetweenVectors(FVector vector1, FVector vector2)
{
float normAB = FMath.Sqrt(vector1.SizeSquared() * vector2.SizeSquared());
return(FindBetween_Helper(vector1, vector2, normAB));
}
