public void Move()
{
//foreach (SnakeSegment a in segments)
//{
// System.Windows.Forms.MessageBox.Show(Board.GetPositionStatus(a.X, a.Y).ToString() );
//}
int snakeLength = segments.Count;
for (int i = snakeLength - 1; i >= 0; i--) // Move each segment starting at END OF TAIL
{
if (!segments[i].IsNew) // move it if not new
{
if (segments[i].IsHead)
{
SegmentToDraw = segments[i];
switch (Direction)
{
case Utility.Movements.up:
// TODO: boundary check
if (segments[i].Y <= 0)
{
endGame(methodOfDeath.wall);
}
Board.SetPositionStatus(segments[i].X, segments[i].Y, Board.PositionStates.empty);
segments[i].Y -= 1;
if (Board.GetPositionStatus(segments[i].X, segments[i].Y) == Board.PositionStates.snake)
{
endGame(methodOfDeath.snake);
}
if (Board.GetPositionStatus(segments[i].X, segments[i].Y) == Board.PositionStates.food)
{
Score++;
GrowSegment();
Board.PlaceFood(segments);
}
break;
case Utility.Movements.down:
// TODO: boundary check
if (segments[i].Y >= Board.PlayfieldHeight - 1)
{
endGame(methodOfDeath.wall);
}
Board.SetPositionStatus(segments[i].X, segments[i].Y, Board.PositionStates.empty);
//segments[i].X = segments[i].X;
segments[i].Y += 1;
//Board.SetPositionStatus(segments[i].X, segments[i].Y, Board.PositionStates.snake);
if (Board.GetPositionStatus(segments[i].X, segments[i].Y) == Board.PositionStates.snake)
{
endGame(methodOfDeath.snake);
}
if (Board.GetPositionStatus(segments[i].X, segments[i].Y) == Board.PositionStates.food)
{
Score++;
GrowSegment();
Board.PlaceFood(segments);
}
break;
case Utility.Movements.left:
// TODO: boundary check
if (segments[i].X <= 0)
{
endGame(methodOfDeath.wall);
}
Board.SetPositionStatus(segments[i].X, segments[i].Y, Board.PositionStates.empty);
segments[i].X -= 1;
//segments[i].Y = segments[i].Y;
//Board.SetPositionStatus(segments[i].X, segments[i].Y, Board.PositionStates.snake);
if (Board.GetPositionStatus(segments[i].X, segments[i].Y) == Board.PositionStates.snake)
{
endGame(methodOfDeath.snake);
}
if (Board.GetPositionStatus(segments[i].X, segments[i].Y) == Board.PositionStates.food)
{
Score++;
GrowSegment();
Board.PlaceFood(segments);
}
break;
case Utility.Movements.right:
// TODO: boundary check
if (segments[i].X >= Board.PlayfieldWidth - 1)
{
endGame(methodOfDeath.wall);
}
Board.SetPositionStatus(segments[i].X, segments[i].Y, Board.PositionStates.empty);
segments[i].X += 1;
//segments[i].Y = segments[i].Y;
//Board.SetPositionStatus(segments[i].X, segments[i].Y, Board.PositionStates.snake);
if (Board.GetPositionStatus(segments[i].X, segments[i].Y) == Board.PositionStates.snake)
{
endGame(methodOfDeath.snake);
}
if (Board.GetPositionStatus(segments[i].X, segments[i].Y) == Board.PositionStates.food)
{
Score++;
GrowSegment();
Board.PlaceFood(segments);
}
break;
default:
break;
}
}
else // not head
{ // move to same spot as leading segment
Board.SetPositionStatus(segments[i].X, segments[i].Y, Board.PositionStates.empty);
segments[i].X = segments[i - 1].X;
segments[i].Y = segments[i - 1].Y;
//Board.SetPositionStatus(segments[i].X, segments[i].Y, Board.PositionStates.snake);
// for board drawing
if (i == snakeLength - 1) // first loop through -- this is the end of tail piece so erase it
{
SegmentToErase = segments[i];
}
}
}
else // was new so it didn't move - mark it not new for next time
{
segments[i].IsNew = false;
//Board.SetPositionStatus(segments[i].X, segments[i].Y, Board.PositionStates.empty);
// Don't mark it to erase since it didn't move
SegmentToErase = null;
}
foreach (SnakeSegment seg in segments)
{
Board.SetPositionStatus(seg.X, seg.Y, Board.PositionStates.snake);
}
}
}