// Checks the current node for a shadow copy and sets it's entity node according to the centre of its image.
public void SetEntityPosition(Node node, ShadowCopy shadowCopy)
{
// Stores the centre of the shadow copy based on its rectangle.
Vector2 v2CopyCentre = shadowCopy.EntityPosition + new Vector2(shadowCopy.RectEntity.Width / 2, shadowCopy.RectEntity.Height / 2);
if (v2CopyCentre != null)
{
if (node.Tile.Contains(new Point((int)v2CopyCentre.X, (int)v2CopyCentre.Y)))
{
shadowCopy.EntityNode = node;
}
}
}
private Texture2D tx2ShadowCopy; // Stores the texture of shadow copies to spawn them.
#endregion
// Instantiates objects and initializes the game grid (creates the grid of nodes).
// Provides the input keys for each player and sets every entity's
// starting position.
public override void Initialize()
{
base.Initialize();
layerGameGrid = new GridLayer(true);
player = new Player[4];
shadowCopy = new ShadowCopy[4];
switch (ScreenManager.Instance.Difficulty)
{
case "easy":
addShadowCopy = new AddShadowCopy[0];
break;
case "intermediate":
addShadowCopy = new AddShadowCopy[2];
break;
case "hard":
addShadowCopy = new AddShadowCopy[4];
break;
case "impossible":
addShadowCopy = new AddShadowCopy[6];
break;
}
InputKeys = new Keys[4, 4];
// four players are instantiated and each has their starting node set by the InitPos function.
for (int intPlayerIndex = 0; intPlayerIndex <= 3; intPlayerIndex++)
{
player[intPlayerIndex] = new Player();
player[intPlayerIndex].Initialize(InitPos(intPlayerIndex, layerGameGrid.Nodes));
}
// Sets the colour of players.
player[0].Colour = Color.Blue;
player[1].Colour = Color.ForestGreen;
player[2].Colour = Color.Gold;
player[3].Colour = Color.Red;
// four shadow copies are instantiated and each has their starting node set by the InitPos function.
for (int intCopyIndex = 0; intCopyIndex <= 3; intCopyIndex++)
{
shadowCopy[intCopyIndex] = new ShadowCopy();
shadowCopy[intCopyIndex].Initialize(InitCopyPos(intCopyIndex, layerGameGrid.Nodes));
}
#region setKeys
InputKeys[0, 0] = Keys.D;
InputKeys[0, 1] = Keys.S;
InputKeys[0, 2] = Keys.A;
InputKeys[0, 3] = Keys.W;
InputKeys[1, 0] = Keys.H;
InputKeys[1, 1] = Keys.G;
InputKeys[1, 2] = Keys.F;
InputKeys[1, 3] = Keys.T;
InputKeys[2, 0] = Keys.L;
InputKeys[2, 1] = Keys.K;
InputKeys[2, 2] = Keys.J;
InputKeys[2, 3] = Keys.I;
InputKeys[3, 0] = Keys.Right;
InputKeys[3, 1] = Keys.Down;
InputKeys[3, 2] = Keys.Left;
InputKeys[3, 3] = Keys.Up;
#endregion
}
// Checks for key presses and processes changes accordingly each update cycle. This deals
// with a number of things such as AI calculation updates, player movement, player interaction,
// lamps, door movement and also to detect if the user has pressed escape to show the pause menu.
public override void Update(GameTime gameTime)
{
if (ScreenManager.Instance.SingleKeyPress(Keys.Escape))
{
ScreenManager.Instance.PushTranslucentScreen(new PauseScreen());
}
for (int intPlayerIndex = 0; intPlayerIndex <= 3; intPlayerIndex++)
{
if (player[intPlayerIndex].Dead != true)
{
Keys[] playerKeys = new Keys[4];
playerKeys[0] = InputKeys[intPlayerIndex, 0];
playerKeys[1] = InputKeys[intPlayerIndex, 1];
playerKeys[2] = InputKeys[intPlayerIndex, 2];
playerKeys[3] = InputKeys[intPlayerIndex, 3];
player[intPlayerIndex].Update(gameTime, playerKeys, layerGameGrid, addShadowCopy, shadowCopy, tx2ShadowCopy);
}
}
if (intProgressionTime > 5) // After 5 seconds, spawn shadow copies.
// Updates each initial copy.
{
foreach (ShadowCopy shadowcopy in shadowCopy)
{
if (shadowcopy != null)
{
shadowcopy.Update(gameTime, player, layerGameGrid.Nodes);
}
}
}
// Updates each additional copy if it has been instantiated.
foreach (AddShadowCopy shadowcopy in addShadowCopy)
{
if (shadowcopy != null)
{
shadowcopy.Update(gameTime, player, layerGameGrid);
}
}
// Every 20 seconds after the start of the game, respawn initial shadow copies if they were erased.
if (intProgressionTime == 20 || intProgressionTime == 40 || intProgressionTime == 60 || intProgressionTime == 80)
{
if (shadowCopy.Count(sc => sc == null) > 0) // Checks if the number of null shadow copies is greater than 0.
{
int intRespawnIndex = Array.IndexOf(shadowCopy, null); // Stores the index of a null item in the array to respawn a shadow copy.
shadowCopy[intRespawnIndex] = new ShadowCopy(); // Respawn a shadow copy at its default spawn point.
shadowCopy[intRespawnIndex].Initialize(InitCopyPos(intRespawnIndex, layerGameGrid.Nodes));
shadowCopy[intRespawnIndex].EntityImage = tx2ShadowCopy;
shadowCopy[intRespawnIndex].Animation.AnimationImage = tx2ShadowCopy;
}
}
layerGameGrid.CheckNodes(player, shadowCopy, addShadowCopy);
intTimeSinceFrame += gameTime.ElapsedGameTime.Milliseconds; // Adds the number of milliseconds passed each frame
if (intTimeSinceFrame >= 1000) // until a second has passed.
{
intProgressionTime += 1; // Then a second is added to the progression time and the time since frame is reset.
intTimeSinceFrame = 0;
}
// After 100 seconds, or if all the players have died, end the game.
if (intProgressionTime == 100 || (player[0].Dead && player[1].Dead && player[2].Dead && player[3].Dead))
{
EndGame(player);
}
}