public void SetCoords(int _x, int _y)
{
collisionMap[X, Y] = false; //update collisionmap
collisionMap[_x, _y] = true;
X = _x;
Y = _y;
screenPosition = GameSurface.ToScreenCoords(_x, _y);
}
/// <summary>
/// Allows the game to perform any initialization it needs to before starting to run.
/// This is where it can query for any required services and load any non-graphic
/// related content. Calling base.Initialize will enumerate through any components
/// and initialize them as well.
/// </summary>
protected override void Initialize()
{
GameSurface.gridWidth = 31;
GameSurface.gridHeight = 31;
var size = GraphicsDevice.PresentationParameters;
GameSurface.Build(size.BackBufferWidth, size.BackBufferHeight);
float x = (float)GameSurface.gridWidth / 2.0f, y = (float)GameSurface.gridHeight / 2.0f; //init pos
snake = new Player((int)x, (int)y, 5);
base.Initialize();
}
public Player(int gridX, int gridY, int count = 1)
{
X = gridX;
Y = gridY;
for (int i = 0; i < count; i++)
{
segs.Add(new Segment(gridX - i, gridY));
//collisionMap[x, y] = true;
//segments.Add(GameSurface.ToScreenCoords(x, y));
}
lastSegmentIndex = segs.Count - 1;
GameSurface.PlaceFood(20, 20);
}
public void Update() //remove last element and add a new one in front
{
if (partStep >= 1.0f)
{
int wholeSteps = (int)partStep;
partStep = 0.0f;
while (wholeSteps > 0) //update until all steps are processed; might not be the best solution if the game is running faster
{
switch (state)
{
case State.UP:
Y -= 1;
break;
case State.DOWN:
Y += 1;
break;
case State.LEFT:
X -= 1;
break;
case State.RIGHT:
X += 1;
break;
}
//Collision detection
int w = GameSurface.gridWidth;
int h = GameSurface.gridHeight;
if ((X < 0 || Y < 0 || X >= w || Y >= h) ||
Segment.collisionMap[X, Y])
{
state = State.CRASHED;
return;
}
var i = segs[lastSegmentIndex]; //get last segment...
if (GameSurface.food.X == X && GameSurface.food.Y == Y) //food collision
{
segs.Insert(lastSegmentIndex, new Segment(i.X, i.Y));
collected++;
GameSurface.PlaceFood();
//AddSegment = false;
}
else
{
if (lastSegmentIndex > 0)
{
lastSegmentIndex--;
}
else
{
lastSegmentIndex = segs.Count - 1;
}
}
i.SetCoords(X, Y); //...so we can move it to the front
//var i = segments[segments.Count - 1];
//segments.RemoveAt(segments.Count - 1);
//segments.Insert(0, GameSurface.ToScreenCoords(X, Y));
wholeSteps--;
}
}
}