protected override void Draw(GameTime game_time)
{
GraphicsDevice.Clear(Color.Black);
sprite_batch.Begin(SpriteSortMode.Immediate, null, SamplerState.PointClamp);
// Draw all the tiles to the screen
foreach (Tile tile in TileManager.GetTileList())
{
// We draw the tiles with an offset so that the camera is always centered on the player
// regardless of where they are in space
sprite_batch.Draw(tile.Sprite, new Vector2(tile.PosX + Camera.x_offset, tile.PosY + Camera.y_offset), Color.White);
}
// Then, draw the entities to the screen
foreach (Entity entity in EntityManager.GetEntityList())
{
// We draw the tiles with an offset so that the camera is always centered on the player
// regardless of where they are in space
sprite_batch.Draw(entity.Sprite, new Vector2(entity.PosX + Camera.x_offset, entity.PosY + Camera.y_offset), Color.White);
}
// Finally, draw the units to the screen
foreach (Unit unit in UnitManager.GetUnitList())
{
// We draw the tiles with an offset so that the camera is always centered on the player
// regardless of where they are in space
sprite_batch.Draw(unit.Sprite, new Vector2(unit.PosX + Camera.x_offset, unit.PosY + Camera.y_offset), Color.White);
}
// Draw the player to the screen, we draw it with the camera offset for the same reason as the tiles
Player player = UnitManager.player;
sprite_batch.Draw(player.Sprite, new Vector2(player.PosX + Camera.x_offset, player.PosY + Camera.y_offset), Color.White);
sprite_batch.End();
base.Draw(game_time);
}
// Get a list of textmaps for the area, convert all the textmaps into tiles,
// then place the tiles into a list so they can be displayed on the screen
public static void CreateGameMap()
{
// This is a list of file names, each file is a separate layer of the gamemap.
// The layers are displayed alphabetically, so layer_2 is displayed above layer_1
var files = Directory.GetFiles($"Maps/{WalkAround.current_map}", "*.txt", SearchOption.TopDirectoryOnly).ToList();
files.Sort();
List <List <string> > layers = new List <List <string> >();
foreach (string file in files)
{
layers.Add(File.ReadAllText(file).Split('\n').ToList());
}
var tile_list = new List <Tile>();
var entity_list = new List <Entity>();
var unit_list = new List <Unit>();
// Create all the tiles and place them in the proper location
foreach (List <string> layer in layers)
{
int x = 0;
int y = 0;
foreach (string line in layer)
{
foreach (char symbol in line.Trim())
{
if (TileCatalog.ContainsKey(symbol))
{
var tl = GetTileInfo(symbol);
tile_list.Add(new Tile(x, y, tl.Width, tl.Height, tl.SpriteLoc, tl.Traversable));
}
else if (NPCCatalog.ContainsKey(symbol))
{
var tl = GetNPCInfo(symbol);
entity_list.Add(new NPC(x, y, tl.Width, tl.Height, tl.SpriteLoc));
}
else if (UnitCatalog.ContainsKey(symbol))
{
var tl = GetUnitInfo(symbol);
unit_list.Add(new Player(x, y, tl.Width, tl.Height, tl.SpriteLoc, tl.MoveSpeed));
}
else
{
throw new KeyNotFoundException($"Tried to create GameObject with unmapped symbol '{symbol}'");
}
x += WalkAround.tile_size;
}
x = 0;
y += WalkAround.tile_size;
}
}
TileManager.UpdateTileList(tile_list);
EntityManager.UpdateEntityList(entity_list);
UnitManager.UpdateUnitList(unit_list);
}
// Returns true if moving to the point (PosX + x_delta, PosY + y_delta)
// would put the entity inside a non-traversable collision box
public bool PredictCollision(int x_delta, int y_delta)
{
var collisions = Logic.FindOverlaps(this, TileManager.GetTileList(), x_delta, y_delta);
return(collisions.Any(x => !x.Traversable));
}