protected override void LoadContent()
{
_spriteBatch = new SpriteBatch(GraphicsDevice);
_screenArea = new Rectangle(
_graphics.GraphicsDevice.Viewport.X,
_graphics.GraphicsDevice.Viewport.Y,
_graphics.GraphicsDevice.Viewport.Width,
_graphics.GraphicsDevice.Viewport.Height
);
_spritesheet = Content.Load<Texture2D>("Spritesheet");
_renderManager = new RenderManager(_graphics, _spriteBatch, _spritesheet, _screenArea);
_world = new Level();
}
public void Render(RenderManager renderManager)
{
renderManager.ClearScreen(Color.Black);
var camera = new Camera(this, _player.Position + new Vector2(-renderManager.ViewportWidth >> 1, -renderManager.ViewportHeight >> 1));
RenderBackground(renderManager, camera);
foreach (var entity in _entities)
{
entity.Render(renderManager, camera);
}
int truncPlayerX = (int)_player.Position.X;
int truncPlayerY = (int)_player.Position.Y;
int offsetX = truncPlayerX - (renderManager.ViewportWidth >> 1);
int offsetY = truncPlayerY - (renderManager.ViewportHeight >> 1);
int tileStartX = offsetX / Tile.Width;
int tileStartY = offsetY / Tile.Height;
int horizTiles = renderManager.ViewportWidth / Tile.Width;
int vertTiles = renderManager.ViewportHeight / Tile.Height;
for (int y = tileStartY - 1; y < tileStartY + vertTiles + 1; y++)
{
for (int x = tileStartX - 1; x < tileStartX + horizTiles + 1; x++)
{
GetTile(x, y).Render(renderManager,
x * Tile.Width - offsetX,
y * Tile.Height - offsetY
);
}
}
}
public override void Render(RenderManager renderManager, int x, int y)
{
}
public abstract void Render(RenderManager renderManager, int x, int y);
private void RenderBackground(RenderManager renderManager, Camera camera)
{
Random rand = new Random();
if (_stars == null)
{
_stars = new List<Star>();
for (var i = 0; i < starDensity; i++)
_stars.Add(new Star(new Vector2(rand.Next(0, renderManager.ViewportWidth), rand.Next(0, renderManager.ViewportHeight))));
}
foreach (var star in _stars)
{
var sx = (star.Position.X + camera.Position.X / 5f).NFMod(renderManager.ViewportWidth);
var sy = (star.Position.Y + camera.Position.Y / 5f).NFMod(renderManager.ViewportHeight);
var tiledPosition = new Vector2(sx, sy);
var starCrop = new Rectangle(96, 0, star.Size, star.Size);
if (rand.Next(0, 90) == 45)
renderManager.DrawTexture(starCrop, tiledPosition, rand.Next(0, 100) / 100);
else
renderManager.DrawTexture(starCrop, tiledPosition);
}
}
public override void Render(RenderManager renderManager, Camera camera)
{
}
public override void Render(RenderManager renderManager, int x, int y)
{
renderManager.DrawTexture(new Rectangle(32, 0, Tile.Width, Tile.Height), new Vector2(x, y));
}
public override void Render(RenderManager renderManager, Camera camera)
{
var offsetPosition = Position - camera.Position - HalfDimensions;
renderManager.DrawTexture(new Rectangle(64, 0, (int)(HalfDimensions.X * 2), (int)(HalfDimensions.Y * 2)), offsetPosition);
}
public abstract void Render(RenderManager renderManager, Camera camera);