protected override void Initialize()
{
//initialise all texture objects.
Pixel = new Texture2D(this.GraphicsDevice, 1, 1);
PlayerTexture = new Texture2D(this.GraphicsDevice, 32, 32);
EntityTexture = new Texture2D(this.GraphicsDevice, 32, 32);
Grass = new Texture2D(this.GraphicsDevice, Tile.TileSideLengthInPixels, Tile.TileSideLengthInPixels);
HighMtn = new Texture2D(this.GraphicsDevice, Tile.TileSideLengthInPixels, Tile.TileSideLengthInPixels);
LowMtn = new Texture2D(this.GraphicsDevice, Tile.TileSideLengthInPixels, Tile.TileSideLengthInPixels);
Sand = new Texture2D(this.GraphicsDevice, Tile.TileSideLengthInPixels, Tile.TileSideLengthInPixels);
Water = new Texture2D(this.GraphicsDevice, Tile.TileSideLengthInPixels, Tile.TileSideLengthInPixels);
Torch = new Texture2D(this.GraphicsDevice, Tile.TileSideLengthInPixels, Tile.TileSideLengthInPixels);
Pixel.SetData <Color>(new Color[] { Color.White });
//generate all textures using pre written functions. The fucntions take in a seed to generate them.
GenTextures.setEntityTexture(1, ref EntityTexture);
GenTextures.setGrassTexture(18390123, ref Grass);
GenTextures.setStoneTexture(18390123, ref HighMtn);
GenTextures.setStoneTexture(2134, ref LowMtn);
GenTextures.setSandTexture(18390123, ref Sand);
GenTextures.setWaterTexture(12341174, ref Water);
GenTextures.setTorchTexture(45642323, ref Torch);
//Initialize input manager for input
inputManager = new Input();
//initialize screen manager object and add an instance of the main menu
screenManager = new MScreenManager(inputManager);
screenManager.addScreen(new ScreenMainMenu(screenManager, inputManager));
base.Initialize();
}
public override void update(GameTime gameTime, bool hasFocus)
{
//each update the timer for the ocean tile update is increased by the elapsed time between the last update and this one.
OceanTextureUpdateTimer += gameTime.ElapsedGameTime.TotalSeconds;
if (OceanTextureUpdateTimer >= 1) //if the elapsed time is more than one second then generate a new texture for the water tiles and reset the timer
{
GenTextures.setWaterTexture(new Random().Next(), ref Game1.Water);
OceanTextureUpdateTimer = 0f;
}
//if the screen is active
if (state == ScreenState.Active)
{
//handles input. If T is pressed we need to make the GUI to leave the island appear, if escape is pressed then we need to pause the game
if (input.isNewPress(Keys.T))
{
manager.addScreen(new ScreenLeaveIslandDialogue(manager, input, this));
}
if (input.isNewPress(Keys.Escape))
{
manager.addScreen(new ScreenPauseGame(manager, input, this));
}
Island.update(gameTime); //update the Island object where our level is stored.
OverlayAlpha = 0;
}
//when the screen is transitioning on we need to increase the overlay alpha until it is 255 which means that it is completely transparent.
else if (state == ScreenState.TransitionOn)
{
Island.update(gameTime);
FadeTimer += gameTime.ElapsedGameTime.TotalSeconds;
if (FadeTimer <= 2)
{
OverlayAlpha = 255 - (int)(FadeTimer / 2.0 * 255);
}
else
{
FadeTimer = 0;
state = ScreenState.Active;
}
}
//when transitioning off we need to decrease the overlay alpha until it is 0. When it is 0 we need to generate a new island
//and set the screen to transition back on.
else if (state == ScreenState.TransitionOff)
{
OverlayAlpha = (int)(FadeTimer / 2.0 * 255);
FadeTimer += gameTime.ElapsedGameTime.TotalSeconds;
if (FadeTimer >= 2)
{
Island.generate(X, Y);
FadeTimer = 0;
state = ScreenState.TransitionOn;
}
}
}
public void generate(int IX, int IY)
{
float NoiseVal;
TileType Type = 0;
// (old method)seed = (int)(0.5 * (double)((IX + IY) * (IX + IY + 1) + IY)); //pairing function, gives a unique integer based on two input coordinates
seed = ((IX << 16) | IY) ^ 0x71EBA1C3; //bit shifts to combine the two coordinates and then adds an XOR bitmask over the top to create seed.
GenTextures.setEntityTexture(seed, ref Game1.EntityTexture); //A new entity texture must be created using this seed.
noise.setSeed(seed);
for (int x = 0; x < 256; x++)
{
for (int y = 0; y < 256; y++)
{
NoiseVal = (float)noise.perlin(x, y, 0.01f) + //creates layered noise. The second layer is at a higher
0.5f * noise.perlin(x, y, 0.05f); // frequency and so creates more intricate details.
float val = 1 - (float)Math.Sqrt(Math.Pow(127.5 - x, 2) + Math.Pow(127.5 - y, 2)) / 127f;
NoiseVal *= val + 0.3f;
//depending on how high the height map is, set the tile to a different type.
if (NoiseVal < 0.9f)
{
Type = TileType.Mountain;
}
if (NoiseVal < 0.85f)
{
Type = TileType.Ridge;
}
if (NoiseVal < 0.70f)
{
if (new Random(seed + x << y).NextDouble() > 0.99) //use the seed and a combination of of the x and y to seed a random value.
{ //if the valeu is greater than 0.99, set the tile to a torhc. If else set it to grass.
Type = TileType.Torch;
}
else
{
Type = TileType.Grass;
}
}
if (NoiseVal < 0.58f)
{
Type = TileType.Sand;
}
if (NoiseVal < 0.55f)
{
Type = TileType.Shore;
}
if (NoiseVal < 0.45f)
{
Type = TileType.Ocean;
}
if (x == 0 || y == 255 || y == 0 || x == 255)
{
Type = TileType.OceanWall; //no matter what, the border tiles need to be ocean walls.
}
Map[x, y] = Tile.combineData(1, Type);
}
}
Player = new EntityPlayer(findEmptySpace(seed)); //ReInitiliase the player object.
generateEntities(seed + 1);
generateLightMap();
}
