public void OnUpdate()
{
this.transform.MoveBy(-this.lastMovement);
// Follow target
if (this.Target != null)
{
Vector2 distance = Target.Pos.Xy - this.transform.Pos.Xy;
this.transform.MoveBy(distance * this.TrailingDistance * Time.TimeMult);
if (this.AlignWithTargetDirection)
{
this.transform.TurnTo(this.Target.Angle);
}
}
// Add shake effect
if (this.shakeGenerator != null)
{
this.lastMovement.Xy = this.shakeGenerator((float)Time.GameTimer.TotalSeconds * this.shakeSpeed) * this.shakeStrength;
this.shakeStrength -= this.shakeDamping * Time.SPFMult * Time.TimeMult;
if (this.shakeStrength <= 1f)
{
this.shakeGenerator = null;
this.lastMovement.Xy = Vector2.Zero;
}
}
this.lastMovement.Z = -(this.transform.Vel.Xy.Length * this.LeanBackRatio);
this.transform.MoveBy(this.lastMovement);
}
/// <summary>
/// Adds a shake to the camera. If the previous shaking is not complete, the remaining strength
/// will combine with the new one.
/// This requires a custom implementation of the generator function.
/// </summary>
/// <param name="generator">The function that generates displacement based on time.</param>
/// <param name="strength">
/// The strength of the shake, or how many pixels it will move at most in one direction (assuming
/// the shake function stays in its default range of [-1, 1]).
/// </param>
/// <param name="time">How long, in seconds, the shake should last.</param>
/// <param name="speed">The speed of the shake. The lower, the less the camera will shake.</param>
public void Shake(ShakeGenerator generator, uint strength, float time, uint speed)
{
if (time < 0)
{
throw new ArgumentException("Time must be greater than 0");
}
this.shakeGenerator = generator;
this.shakeStrength += strength;
this.shakeDamping = strength / time;
this.shakeSpeed = speed;
}
