public Mover(Game1 game, int tileX, int tileY, Texture2D texture)
{
this.game = game;
this.tileX = tileX;
this.tileY = tileY;
x = Map.TileToCoordinate(tileX);
y = Map.TileToCoordinate(tileY);
direction = Game1.RIGHT;
destRect = new Rectangle((int)x, (int)y, Game1.TILE_SIZE, Game1.TILE_SIZE);
this.texture = texture;
}
protected int DistanceFromLastTile()
{
switch (direction)
{
case Game1.UP:
return(Map.TileToCoordinate(tileY) - (int)y);
case Game1.LEFT:
return(Map.TileToCoordinate(tileX) - (int)x);
case Game1.RIGHT:
return((int)x - Map.TileToCoordinate(tileX));
case Game1.DOWN:
return((int)y - Map.TileToCoordinate(tileY));
default:
return(-1);
}
}
public void Update()
{
switch (direction)
{
case -1: //this represents staying in place
break;
case Game1.UP:
y -= speed;
break;
case Game1.LEFT:
x -= speed;
break;
case Game1.RIGHT:
x += speed;
break;
case Game1.DOWN:
y += speed;
break;
}
//if it passes an intersection, it will snap back to the intersection, change its direction and move in that direction the amount of lost distance
int distanceFromLastTile = DistanceFromLastTile();
if (distanceFromLastTile > Game1.TILE_SIZE || direction == -1)
{
switch (direction)
{
case -1: //this represents staying in place
break;
case Game1.UP:
y = Map.TileToCoordinate(tileY - 1);
break;
case Game1.LEFT:
x = Map.TileToCoordinate(tileX - 1);
break;
case Game1.RIGHT:
x = Map.TileToCoordinate(tileX + 1);
break;
case Game1.DOWN:
y = Map.TileToCoordinate(tileY + 1);
break;
}
if (direction != -1)
{
//update tileX and tileY so we can use them at the next intersection
tileX = Map.CoordinateToTile((int)x);
tileY = Map.CoordinateToTile((int)y);
}
bool wasMoving = direction != -1; //this is only used to make it not do anything with turnDistance
direction = NextDirection();
if (wasMoving)
{
float turnDistance = distanceFromLastTile - Game1.TILE_SIZE; //this is the amount of distance left over it should travel in this frame in the new direction
switch (direction)
{
case -1: //this represents staying in place
break;
case Game1.UP:
y -= turnDistance;
break;
case Game1.LEFT:
x -= turnDistance;
break;
case Game1.RIGHT:
x += turnDistance;
break;
case Game1.DOWN:
y += turnDistance;
break;
}
}
}
checkWrap();
//update position of destRect
destRect.X = (int)x - Game1.TILE_SIZE / 2;
destRect.Y = (int)y - Game1.TILE_SIZE / 2;
}