/// <summary>
/// The camera is updated once per frame automatically by the renderer.
/// </summary>
public override void Update()
{
// Check if no target.
if (Target == null)
{
return;
}
// Check if target last position is set. It isn't on the first frame.
if (_targetLastPosition == Vector2.Zero)
{
_targetLastPosition = Target.Center;
}
// Get mouse location.
Vector2 mouseLocation = ScreenToWorld(Engine.InputManager.GetMousePosition());
// Smooth between the mouse location and the target.
float lx = MathExtension.Lerp(Target.Center.X, mouseLocation.X, MathExtension.Clamp(Speed * Engine.FrameTime, 0, CameraMaxDistance));
float ly = MathExtension.Lerp(Target.Center.Y, mouseLocation.Y, MathExtension.Clamp(Speed * Engine.FrameTime, 0, CameraMaxDistance));
Center = new Vector2(lx, ly);
// Record position.
_targetLastPosition = Target.Center;
}
/// <summary>
/// Performs linear interpolation of <see cref="Color" />.
/// </summary>
/// <param name="value1">Source <see cref="Color" />.</param>
/// <param name="value2">Destination <see cref="Color" />.</param>
/// <param name="amount">Interpolation factor.</param>
/// <returns>Interpolated <see cref="Color" />.</returns>
public static Color Lerp(Color value1, Color value2, float amount)
{
amount = MathExtension.Clamp(amount, 0, 1);
return(new Color(
(byte)MathExtension.Lerp(value1.R, value2.R, amount),
(byte)MathExtension.Lerp(value1.G, value2.G, amount),
(byte)MathExtension.Lerp(value1.B, value2.B, amount),
(byte)MathExtension.Lerp(value1.A, value2.A, amount)));
}
public override short Interpolate(short a, short b, float t)
{
return(MathExtension.Lerp(a, b, t));
}
public override int Interpolate(int a, int b, float t)
{
return(MathExtension.Lerp(a, b, t));
}
public override long Interpolate(long a, long b, float t)
{
return(MathExtension.Lerp(a, b, t));
}