/// <summary>
/// Centers Camera on Sprite
/// </summary>
/// <param name="target">IDrawable to be targeted</param>
public void FocusOn(Graphics.IDrawable target)
{
Vector2 targetpos = new Vector2();
targetpos.X = (target.Position.X - Camera.Bounds.Width / 2 + target.Area.Width / 2);
targetpos.Y = (target.Position.Y - Camera.Bounds.Height / 2 + target.Area.Height / 2);
var cmd = new CameraCommand(INF_TIME, targetpos, true, targetpos);
//Thanks to the wonders of references this keeps the target up to date
cmd.spriteTarget = target;
this.commands.Add(cmd);
}
/// <summary>
/// Moves the Camera in a straight line to a point over a number of seconds
/// </summary>
/// <param name="target"><see cref="Graphics.IDrawable"/>Target to be moved to</param>
/// <param name="time">Time in seconds</param>
public void MoveTo(Graphics.IDrawable target, double time)
{
Vector2 targetpos = new Vector2();
targetpos.X = (target.Position.X - Camera.Bounds.Width / 2 + target.Area.Width / 2);
targetpos.Y = (target.Position.Y - Camera.Bounds.Height / 2 + target.Area.Height / 2);
var cmd = new CameraCommand(time, targetpos, false, Vector2.Zero);
//Thanks to the wonders of references this keeps the target up to date
cmd.spriteTarget = target;
this.commands.Add(cmd);
}
public void StopCurrentCommand()
{
this.current.movementTimer = -1;
//Swap out the current to the next command
if (commands.Count > 0)
{
//Pop the next command in line
InMotion = false;
current = commands[0];
commands.RemoveAt(0);
//If the target start is null then start where the Camera is now
current.targetStart = (!current.targetStartDiffer ? this.Camera.Position : current.targetStart);
this.Camera.Position = current.targetStart;
}
}
public void Update(GameTime gameTime)
{
//An infinite timed command is used until another command is issued
if (current.movementTimerTotal == INF_TIME)
{
this.Camera.Position = current.target;
}
//If the target is a sprite, update the target position
if (current.spriteTarget != null)
{
current.target.X = (current.spriteTarget.Position.X - Camera.Bounds.Width / 2 + current.spriteTarget.Area.Width / 2);
current.target.Y = (current.spriteTarget.Position.Y - Camera.Bounds.Height / 2 + current.spriteTarget.Area.Height / 2);
}
if (commands.Count > 0 && current.movementTimer <= 0)
{
//Pop the next command in line
InMotion = false;
current = commands[0];
commands.RemoveAt(0);
//If the target start is Vector.Zero then start where the Camera is now
current.targetStart = (!current.targetStartDiffer ? Camera.Position : current.targetStart);
this.Camera.Position = current.targetStart;
}
if (current.movementTimer > 0)
{
current.movementTimer -= gameTime.ElapsedGameTime.TotalSeconds;
if (current.movementTimer < 0)
{
//Corrects for any calculation error that occurred during the movement
Camera.Position = current.target;
}
else
{
//Get the Percentage of how far the movement should be through
Camera.Position = new Vector2((float)((current.target.X - current.targetStart.X) * (current.movementTimerTotal - current.movementTimer) / current.movementTimerTotal + current.targetStart.X),
(float)((current.target.Y - current.targetStart.Y) * (current.movementTimerTotal - current.movementTimer) / current.movementTimerTotal + current.targetStart.Y));
InMotion = true;
}
}
}
