/// <summary>
/// Moves block over an arbitrairy vector
/// </summary>
/// <param name="xoff">x movement</param>
/// <param name="yoff">y movement</param>
/// <returns>Movement succeeded</returns>
protected Boolean Move(Int32 xoff, Int32 yoff)
{
if(this.Field.Collides(this.Block, this.X + xoff, this.Y + yoff))
return false;
Event e = new Event();
Int32 prevx = X;
Int32 prevy = Y;
Double prevtime = this.LastMoveTime;
Double newtime = this.Field.Timeline.CurrentTime;
var wasRot = this.LastMoveIsRotation;
var wasKick = this.LastMoveIsKick;
e.Undo = () =>
{
this.Field.CurrentBlock.X = prevx;
this.Field.CurrentBlock.Y = prevy;
this.LastMoveTime = prevtime;
this.LastMoveIsRotation = wasRot;
this.LastMoveIsKick = wasKick;
};
Int32 newx = X + xoff;
Int32 newy = Y + yoff;
e.Apply = () =>
{
this.Field.CurrentBlock.X = newx;
this.Field.CurrentBlock.Y = newy;
this.LastMoveTime = newtime;
this.LastMoveIsRotation = false;
this.LastMoveIsKick = false;
};
this.Field.Timeline.Add(e);
return true;
}
/// <summary>
/// Rotates a block an arbitrary direction
/// </summary>
/// <param name="dir">Direction to rotate</param>
/// <returns>Rotation succeeded</returns>
protected Boolean Rotate(Int32 dir)
{
int rot = this.Block.Rotation;
this.Block.Rotation += dir;
Int32[,] wallkicks = (dir > 0) ? Wallkick.WallkickData.RightMovements[new Tuple<int, int>(this.Block.Width, this.Block.Rotation)]
: Wallkick.WallkickData.LeftMovements[new Tuple<int, int>(this.Block.Width, this.Block.Rotation)];
// Tries to wall kick until block doesn't collide
for(Int32 i = 0; i < wallkicks.GetLength(0); i++)
{
if (this.Field.Collides(Block, X + wallkicks[i, 0], Y + wallkicks[i, 1]))
continue;
Event e = new Event();
Int32 prevx = X;
Int32 prevy = Y;
Double prevtime = this.LastMoveTime;
Double newtime = Field.Timeline.CurrentTime;
var wasRot = this.LastMoveIsRotation;
var wasKick = this.LastMoveIsKick;
e.Undo = () =>
{
this.X = prevx;
this.Y = prevy;
this.Block.Rotation = rot;
this.LastMoveTime = prevtime;
this.LastMoveIsRotation = wasRot;
this.LastMoveIsKick = wasKick;
};
Int32 newx = X + wallkicks[i, 0];
Int32 newy = Y + wallkicks[i, 1];
Int32 newrot = rot + dir;
e.Apply = () =>
{
this.Field.CurrentBlock.X = newx;
this.Field.CurrentBlock.Y = newy;
this.Field.CurrentBlock.Block.Rotation = newrot;
this.LastMoveTime = newtime;
this.LastMoveIsRotation = true;
this.LastMoveIsKick = i > 0;
};
this.Field.Timeline.Add(e);
return true;
}
// Rotation failed
this.Block.Rotation -= dir;
return false;
}
/// <summary>
/// Adds an event
/// </summary>
/// <param name="action">event to register</param>
/// <returns>Event time</returns>
public Double Add(Event action)
{
action.Time = this.CurrentTime;
action.Apply();
this.Events.Push(action);
return action.Time;
}