/// <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);
}
}