protected override void Initialize()
{
base.Initialize();
// the default viewport adapater is the simplest, it doesn't do any scaling at all
// but is used by a Camera2D if no other adapter is specified.
// this is often useful if you have a game with a large map and you want the player to see
// more of the map on a bigger screen.
_defaultViewportAdapter = new DefaultViewportAdapter(GraphicsDevice);
// the scaling viewport adapter stretches the output to fit in the viewport, ignoring the aspect ratio
// this works well if the aspect ratio doesn't change a lot between devices
// or you don't like the black bars of the boxing adapter
_scalingViewportAdapter = new ScalingViewportAdapter(GraphicsDevice, 800, 480);
// the boxing viewport adapter uses letterboxing or pillarboxing to maintain aspect ratio
// it's a little more complicated and needs to listen to the window client size changing event
_boxingViewportAdapter = new BoxingViewportAdapter(GraphicsDevice, 800, 480);
Window.ClientSizeChanged += (s, e) => _currentViewportAdapter.OnClientSizeChanged();
// typically you'll only ever want to use one viewport adapter for a game, but in this sample we'll be
// switching between them.
_currentViewportAdapter = _boxingViewportAdapter;
}
public void Camera2D_LookAt_Test()
{
var graphicsDevice = TestHelper.CreateGraphicsDevice();
var viewportAdapter = new DefaultViewportAdapter(graphicsDevice);
var camera = new Camera2D(viewportAdapter);
camera.LookAt(new Vector2(100, 200));
Assert.AreEqual(new Vector2(-300, -40), camera.Position);
}
public void DefaultViewportAdapter_Test()
{
var graphicsDevice = TestHelper.CreateGraphicsDevice();
var viewportAdapter = new DefaultViewportAdapter(graphicsDevice);
graphicsDevice.Viewport = new Viewport(0, 0, 1024, 768);
Assert.AreEqual(1024, viewportAdapter.ViewportWidth);
Assert.AreEqual(768, viewportAdapter.ViewportHeight);
Assert.AreEqual(viewportAdapter.ViewportWidth, viewportAdapter.VirtualWidth);
Assert.AreEqual(viewportAdapter.ViewportHeight, viewportAdapter.VirtualHeight);
Assert.AreEqual(Matrix.Identity, viewportAdapter.GetScaleMatrix());
}
public void Camera2D_GetBoundingRectangle_Test()
{
var graphicsDevice = TestHelper.CreateGraphicsDevice();
var viewport = new DefaultViewportAdapter(graphicsDevice);
var camera = new Camera2D(viewport);
camera.Move(new Vector2(2, 0));
camera.Move(new Vector2(0, 3));
var boundingRectangle = camera.GetBoundingRectangle();
Assert.AreEqual(2, boundingRectangle.Left, 0.01);
Assert.AreEqual(3, boundingRectangle.Top, 0.01);
Assert.AreEqual(802, boundingRectangle.Right, 0.01);
Assert.AreEqual(483, boundingRectangle.Bottom, 0.01);
}