/// <summary>
/// The clamp speed.
/// </summary>
/// <param name="entity">
/// The entity.
/// </param>
/// <param name="maximumXSpeed">
/// The maximum x speed.
/// </param>
/// <param name="maximumYSpeed">
/// The maximum y speed.
/// </param>
public void ClampSpeed(IHasVelocity entity, float?maximumXSpeed, float?maximumYSpeed)
{
if (maximumXSpeed != null)
{
if (entity.XSpeed < -Math.Abs(maximumXSpeed.Value))
{
entity.XSpeed = -Math.Abs(maximumXSpeed.Value);
}
if (entity.XSpeed > Math.Abs(maximumXSpeed.Value))
{
entity.XSpeed = Math.Abs(maximumXSpeed.Value);
}
}
if (maximumYSpeed != null)
{
if (entity.YSpeed < -Math.Abs(maximumYSpeed.Value))
{
entity.YSpeed = -Math.Abs(maximumYSpeed.Value);
}
if (entity.YSpeed > Math.Abs(maximumYSpeed.Value))
{
entity.YSpeed = Math.Abs(maximumYSpeed.Value);
}
}
}
public static float XPositionOfTime(this IHasVelocity velocity, double time)
{
float positionX = (float)time * velocity.Velocity * MULTIPLE;
//positionX = positionX % Width;
//inverse
//position_x = -position_x + screenWidth + 10;
//return positionX;
return(positionX);
}
/// <summary>
/// The apply gravity.
/// </summary>
/// <param name="entity">
/// The entity.
/// </param>
/// <param name="xGravity">
/// The x gravity.
/// </param>
/// <param name="yGravity">
/// The y gravity.
/// </param>
public void ApplyGravity(IHasVelocity entity, float xGravity, float yGravity)
{
entity.XSpeed += xGravity;
entity.YSpeed += yGravity;
}
/// <summary>
/// The apply gravity.
/// </summary>
/// <param name="entity">
/// The entity.
/// </param>
/// <param name="xGravity">
/// The x gravity.
/// </param>
/// <param name="yGravity">
/// The y gravity.
/// </param>
public void ApplyGravity(IHasVelocity entity, float xGravity, float yGravity)
{
entity.XSpeed += xGravity;
entity.YSpeed += yGravity;
}
/// <summary>
/// The clamp speed.
/// </summary>
/// <param name="entity">
/// The entity.
/// </param>
/// <param name="maximumXSpeed">
/// The maximum x speed.
/// </param>
/// <param name="maximumYSpeed">
/// The maximum y speed.
/// </param>
public void ClampSpeed(IHasVelocity entity, float? maximumXSpeed, float? maximumYSpeed)
{
if (maximumXSpeed != null)
{
if (entity.XSpeed < -Math.Abs(maximumXSpeed.Value))
{
entity.XSpeed = -Math.Abs(maximumXSpeed.Value);
}
if (entity.XSpeed > Math.Abs(maximumXSpeed.Value))
{
entity.XSpeed = Math.Abs(maximumXSpeed.Value);
}
}
if (maximumYSpeed != null)
{
if (entity.YSpeed < -Math.Abs(maximumYSpeed.Value))
{
entity.YSpeed = -Math.Abs(maximumYSpeed.Value);
}
if (entity.YSpeed > Math.Abs(maximumYSpeed.Value))
{
entity.YSpeed = Math.Abs(maximumYSpeed.Value);
}
}
}
public static Vector2 PositionOfTime(this IHasVelocity velocity, double time)
{
return(new Vector2(XPositionOfTime(velocity, time), 0));
}
