// draw the given unit's graphic
private void DrawGraphic(SpriteBatch sb, UnitInstance unit)
{
if (unit == null)
{
return; // don't render anything if the unit is null
}
// calculate the units position
Vector2 tileCentre = boardRenderer.GetTileCentre(unit.Location);
Rectangle dest = new Rectangle(
(int)tileCentre.X - boardRenderer.TileSize / 2,
(int)tileCentre.Y - boardRenderer.TileSize / 2,
boardRenderer.TileSize,
boardRenderer.TileSize);
// draw the correct sprite at the unit's position
SpriteAtlas atlas = Engine.Instance.Content.GetAsset <SpriteAtlas>(unit.BaseUnit.IconAtlas);
atlas.Draw(sb, unit.BaseUnit.IconKey, dest); // TODO this might be bad for performance
}