/// <summary>
/// Returns the X's and Y's to draw. Min and Max.
/// </summary>
/// <param name="spriteBatch"></param>
/// <param name="cameraPosition"></param>
/// <param name="Tile"></param>
/// <returns></returns>
private Boundaries GetDrawTiles(SpriteBatch spriteBatch, Vector2 cameraPosition, float TileSize, float zoom,
PlanetLevel level)
{
TileSize = ConvertUnits.ToDisplayUnits(TileSize);
// Tiles need to be resized depending upon zoom level. Performance optimization
float ZoomedTile = TileSize * zoom;
// Everything is relative to the ship
Vector2 TileShipIsOver = new Vector2(
// Ceiling indicates the max. A few pixels offscreen is better than black bar!
(float)Math.Floor(cameraPosition.X / TileSize),
(float)Math.Floor(cameraPosition.Y / TileSize));
float width, height; // # of tiles across screen
width = (float)Math.Ceiling(spriteBatch.GraphicsDevice.Viewport.Width / ZoomedTile);
height = (float)Math.Ceiling(spriteBatch.GraphicsDevice.Viewport.Height / ZoomedTile);
// Define boundaries for drawing, this is hackish still.
Boundaries boundaries = new Boundaries();
boundaries.Left = (int)(TileShipIsOver.X - Math.Floor(width / 2f)) - 1; // Left
boundaries.Right = (int)(TileShipIsOver.X + Math.Ceiling(width / 2f)) + 3; // Right
boundaries.Top = (int)(TileShipIsOver.Y - Math.Floor(height / 2f)) - 1; // Top
boundaries.Bottom = (int)(TileShipIsOver.Y + Math.Ceiling(height / 2f)) + 4; // Bottom
return(boundaries);
}
public Vector2 GetMiddlePosition(PlanetLevel l)
{
return(new Vector2(((l.xSize * _tileSize) / 2), // Start in Middle
((l.ySize * _tileSize) / 2)));
}
public Vector2 SetToMiddle(PlanetLevel l)
{
return(new Vector2(((l.xSize * _wallWidth) / 2), // Start in Middle
((l.ySize * _wallHeight) / 2)));
}
public virtual void Draw(SpriteBatch spriteBatch, Camera2D layoutCamera, float TileSize, PlanetLevel level)
{
drawArea = GetDrawTiles(spriteBatch, layoutCamera.Pos, TileSize, layoutCamera.Zoom, level);
// Get variables from Vector Array
right = (int)drawArea.Right;
left = (int)drawArea.Left;
top = (int)drawArea.Top;
bottom = (int)drawArea.Bottom;
for (int y = top; y <= bottom; y++)
{
for (int x = left; x <= right; x++)
{
if (x < 0 || x > level.PlanetMap.GetLength(0) - 1 ||
y < 0 || y > level.PlanetMap.GetLength(1) - 1) // Draw into the infinite distance.
{
DrawTile(spriteBatch, new Tile {
position = new Vector2(x * TileSize, y * TileSize), type = TileTypes.Wall
});
continue;
}
DrawTile(spriteBatch, level.PlanetMap[x, y]);
}
}
}
