public void CameraOuterBoundsTests()
{
// create physical viewport
var backend = new DummyBackend2D(2000, 500);
// virtual camera
var innerCamera = CameraTransform2D.Create(Matrix3x2.CreateTranslation(700, 0), (500, -500));
// get virtual viewport
Assert.IsTrue(Transforms.Canvas2DTransform.TryCreate(backend, innerCamera, out var virtualCanvas));
// draw onto the virtual canvas
virtualCanvas.DrawRectangle((2, 2), (1, 1), System.Drawing.Color.Red);
// check bounds in the physical backend
var(bMin, bMax) = backend.BoundingBox;
Assert.AreEqual(53, bMax.X);
Assert.AreEqual(498, bMax.Y);
bMax -= bMin;
Assert.AreEqual(1, bMax.X);
Assert.AreEqual(1, bMax.Y);
// check if we can retrieve the outer camera bounds
Assert.IsTrue(CameraTransform2D.TryGetOuterCamera(virtualCanvas, out var outerCamera));
var outerRect = outerCamera.GetOuterBoundingRect();
Assert.AreEqual(-50, outerRect.X);
Assert.AreEqual(0, outerRect.Y);
Assert.AreEqual(2000, outerRect.Width);
Assert.AreEqual(500, outerRect.Height);
}
public void CameraTransform2DTests()
{
var cam1 = CameraTransform2D.Create(Matrix3x2.Identity, (500, 500)); // Top-Down
var cam2 = CameraTransform2D.Create(Matrix3x2.Identity, (500, -500)); // Bottom-Top
Point2 p1 = Vector2.Transform(Vector2.Zero, cam1.CreateFinalMatrix((500, 500)));
Assert.AreEqual(Point2.Zero, p1);
p1 = Vector2.Transform(Vector2.Zero, cam2.CreateFinalMatrix((1000, 1000)));
Assert.AreEqual(new Point2(0, 1000), p1);
p1 = Vector2.Transform(Vector2.Zero, cam1.CreateFinalMatrix((1000, 500)));
Assert.AreEqual(new Point2(250, 0), p1);
}