/// <summary>
/// Progress the snake's head forward.
/// </summary>
/// <param name="level">The current level.</param>
private void moveHead(LevelType level)
{
PortalType portal;
//If the snake is in a portal, check to see if it can teleport
if (level.tryGetPortal(head.Vector, out portal))
{
//If the snake's orientation is the same as the portal's, teleport.
if (head.Orientation == portal.Entrance)
{
portal.teleport();
}
//Else clear the portal and move the snake normally
else
{
portal.clearPortal();
head.Vector += MovementFunctions.calculateLocation(Orientation);
}
}
//If the snake is in a normal square, move normally
else
{
head.Vector += MovementFunctions.calculateLocation(Orientation);
}
}
private void movement(FoodType food, LevelType level)
{
PortalType portal;
//If the food is in a portal, clear the portal
if (level.tryGetPortal(food.Vector, out portal))
{
portal.clearGrid(level);
}
//Else empty the old grid cell
else
{
level.Grid.GetCell(food.Vector).emptyCell();
}
//Add the movement vector to the current mouse vector
Vector2 newLocation = food.Vector + MovementFunctions.calculateLocation(orientation);
if (level.tryGetPortal(newLocation, out portal))
{
if (!portal.IsFull)
{
food.Vector = newLocation;
portal.fillPortal(food);
}
}
else if (level.Grid.GetCell(newLocation).content == CellContent.empty)
{
food.Vector = newLocation;
}
food.fillGrid(level);
}
/// <summary>
/// This function returns the content of the cell the snake is attempting to move to.
/// </summary>
/// <param name="grid">The game grid that contains all object data for the level.</param>
/// <returns>Returns the content of the cell the snake will move into. Depending on this, the game will respond
/// differently, i.e. if there is a wall, the game wil go to game over.</returns>
private CellContent collision(LevelType level)
{
Vector2 newLocation = MovementFunctions.calculateLocation(Orientation) + Vector;
try
{
return(level.Grid.GetCell(newLocation).content);
}
catch
{
return(CellContent.portal);
}
}
/// <summary>
/// Acts as the food item's draw method, but instead of drawing straight to the screen, it fills the level's grid
/// with its texture, which is drawn when the grid is drawn.
/// </summary>
/// <param name="grid">The level's grid.</param>
public void fillGrid(LevelType level)
{
rotation = MovementFunctions.calculateRotation(ai.Orientation);
PortalType portal;
if (level.tryGetPortal(vector, out portal))
{
portal.fillGrid(level);
}
fill(level.Grid);
}
/// <summary>
/// Turns the snake based on the input from the user.
/// </summary>
/// <param name="i">The game's input handler</param>
private void turn(InputHandlerComponent i)
{
//The new orientation of the snake
OrientationType newOrientation = head.Orientation;
//Get the new orientation based on the input
if (i.getButton("Right", true) && head.Orientation != OrientationType.left)
{
newOrientation = OrientationType.right;
}
else if (i.getButton("Up", true) && head.Orientation != OrientationType.down)
{
newOrientation = OrientationType.up;
}
else if (i.getButton("Down", true) && head.Orientation != OrientationType.up)
{
newOrientation = OrientationType.down;
}
else if (i.getButton("Left", true) && head.Orientation != OrientationType.right)
{
newOrientation = OrientationType.left;
}
//If there has been a change in the orientation, add a curve and change the snake
if (newOrientation != head.Orientation)
{
CurveType curve = new CurveType();
curve.deepCopy(temp);
curve.Vector = head.Vector;
curve.Orientation = newOrientation;
curve.Rotation = MovementFunctions.calculateCurveRotation(head.Orientation, newOrientation);
curves.Add(curve.Vector, curve);
head.Orientation = newOrientation;
canTurn = false;
}
}
public virtual void fillGrid(GameGrid grid, Color color)
{
float rotation = MovementFunctions.calculateRotation(orientation);
grid.GetCell(vector).fillCell(CellContent.snake, texture, rotation, color);
}
/// <summary>
/// Initializes the food item's AI agent and the rotation of the food item.
/// </summary>
public void initialize()
{
ai.initialize();
rotation = MovementFunctions.calculateRotation(ai.Orientation);
}