/
Camera2DScreenSpaceTests.cs
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/
Camera2DScreenSpaceTests.cs
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using DeltaEngine.Core;
using DeltaEngine.Datatypes;
using DeltaEngine.Mocks;
using DeltaEngine.ScreenSpaces;
using NUnit.Framework;
namespace DeltaEngine.Tests.ScreenSpaces
{
public class Camera2DScreenSpaceTests
{
[Test]
public void LookAt()
{
var camera = new Camera2DScreenSpace(window);
Assert.AreEqual(Vector2D.Half, camera.LookAt);
camera.LookAt = Vector2D.One;
Assert.AreEqual(Vector2D.One, camera.LookAt);
}
private readonly Window window = new MockWindow();
[Test]
public void Zoom()
{
var camera = new Camera2DScreenSpace(window);
Assert.AreEqual(1.0f, camera.Zoom);
camera.Zoom = 2.5f;
Assert.AreEqual(2.5f, camera.Zoom);
}
[Test]
public void IfCameraNotAdjustedItBehavesIdenticallyToQuadraticScreenSpace()
{
var q = new QuadraticScreenSpace(window);
var c = new Camera2DScreenSpace(window);
Assert.IsTrue(
c.FromPixelSpace(new Vector2D(1, 2)).IsNearlyEqual(q.FromPixelSpace(new Vector2D(1, 2))));
Assert.IsTrue(
c.FromPixelSpace(new Size(-3, 4)).IsNearlyEqual(q.FromPixelSpace(new Size(-3, 4))));
Assert.IsTrue(
c.ToPixelSpace(new Vector2D(2, 6)).IsNearlyEqual(q.ToPixelSpace(new Vector2D(2, 6))));
Assert.IsTrue(c.ToPixelSpace(new Size(-2, 0)).IsNearlyEqual(q.ToPixelSpace(new Size(-2, 0))));
}
[Test]
public void IfCameraNotAdjustedEdgesAreIdenticalToQuadraticScreenSpace()
{
var q = new QuadraticScreenSpace(window);
var c = new Camera2DScreenSpace(window);
Assert.AreEqual(q.TopLeft, c.TopLeft);
Assert.AreEqual(q.BottomRight, c.BottomRight);
Assert.AreEqual(q.Top, c.Top, 0.0001f);
Assert.AreEqual(q.Left, c.Left, 0.0001f);
Assert.AreEqual(q.Bottom, c.Bottom, 0.0001f);
Assert.AreEqual(q.Right, c.Right, 0.0001f);
}
[Test]
public void EdgesAfterZoomingIn()
{
Assert.AreEqual(16 / 9.0f, window.ViewportPixelSize.AspectRatio);
var camera = new Camera2DScreenSpace(window) { Zoom = 2.0f };
Assert.AreEqual(new Vector2D(0.25f, 0.359375f), camera.TopLeft);
Assert.AreEqual(new Vector2D(0.75f, 0.640625f), camera.BottomRight);
Assert.AreEqual(0.359375f, camera.Top, 0.0001f);
Assert.AreEqual(0.25f, camera.Left, 0.0001f);
Assert.AreEqual(0.640625f, camera.Bottom, 0.0001f);
Assert.AreEqual(0.75f, camera.Right, 0.0001f);
}
[Test]
public void EdgesAfterPanning()
{
Assert.AreEqual(16 / 9.0f, window.ViewportPixelSize.AspectRatio);
var camera = new Camera2DScreenSpace(window)
{
LookAt = new Vector2D(0.75f, 0.6f)
};
Assert.IsTrue(camera.TopLeft.IsNearlyEqual(new Vector2D(0.25f, 0.31875f)));
Assert.IsTrue(camera.BottomRight.IsNearlyEqual(new Vector2D(1.25f, 0.88125f)));
Assert.AreEqual(0.31875f, camera.Top, 0.0001f);
Assert.AreEqual(0.25f, camera.Left, 0.0001f);
Assert.AreEqual(0.88125f, camera.Bottom, 0.0001f);
Assert.AreEqual(1.25f, camera.Right, 0.0001f);
}
[Test]
public void EdgesAfterPanningAndZooming()
{
Assert.AreEqual(16 / 9.0f, window.ViewportPixelSize.AspectRatio);
var camera = new Camera2DScreenSpace(window)
{
LookAt = new Vector2D(0.4f, 0.5f),
Zoom = 0.5f
};
Assert.AreEqual(new Vector2D(-0.6f, -0.0625f), camera.TopLeft);
Assert.AreEqual(new Vector2D(1.4f, 1.0625f), camera.BottomRight);
Assert.AreEqual(-0.0625f, camera.Top, 0.0001f);
Assert.AreEqual(-0.6f, camera.Left, 0.0001f);
Assert.AreEqual(1.0625f, camera.Bottom, 0.0001f);
Assert.AreEqual(1.4f, camera.Right, 0.0001f);
}
[Test]
public void LoopingToAndFromPixelSpaceLeavesAPointUnchanged()
{
var camera = new Camera2DScreenSpace(window)
{
LookAt = new Vector2D(-0.5f, 0.6f),
Zoom = 3.0f
};
Assert.IsTrue(
camera.ToPixelSpace(camera.FromPixelSpace(new Vector2D(1.2f, 3.4f))).IsNearlyEqual(
new Vector2D(1.2f, 3.4f)));
Assert.IsTrue(
camera.FromPixelSpace(camera.ToPixelSpace(new Vector2D(1.2f, 3.4f))).IsNearlyEqual(
new Vector2D(1.2f, 3.4f)));
}
[Test]
public void ToPixelSpace()
{
var quadraticSize = new Size(window.ViewportPixelSize.Width);
var camera = new Camera2DScreenSpace(window)
{
LookAt = new Vector2D(-0.5f, 0.6f),
Zoom = 2.0f
};
Assert.AreEqual(quadraticSize.Width * 1.5f, camera.ToPixelSpace(Vector2D.Zero).X);
Assert.IsTrue(camera.ToPixelSpace(Vector2D.Half).IsNearlyEqual(new Vector2D(800, 26)));
Assert.IsTrue(camera.ToPixelSpace(Vector2D.One).IsNearlyEqual(new Vector2D(1120, 346)));
Assert.AreEqual(quadraticSize, camera.ToPixelSpace(Size.Half));
}
[Test]
public void ToPixelSpaceWithRotation()
{
var quadraticSize = new Size(window.ViewportPixelSize.Width);
var camera = new Camera2DScreenSpace(window) { Rotation = 90.0f };
Assert.AreEqual(0.0f, camera.ToPixelSpace(Vector2D.Zero).X);
Assert.IsTrue(camera.ToPixelSpace(Vector2D.Half).IsNearlyEqual(new Vector2D(-160.0f, 90.0f)));
Assert.IsTrue(
camera.ToPixelSpace(Vector2D.One).IsNearlyEqual(new Vector2D(-320.0f, (160.0f + 90.0f))));
Assert.AreEqual(quadraticSize, camera.ToPixelSpace(Size.One));
}
[Test]
public void FromPixelSpace()
{
var camera = new Camera2DScreenSpace(window)
{
LookAt = new Vector2D(-0.5f, 0.6f),
Zoom = 2.0f
};
Assert.IsTrue(
camera.FromPixelSpace(Vector2D.Zero).IsNearlyEqual(new Vector2D(-0.75f, 0.459375f)));
Assert.IsTrue(
camera.FromPixelSpace((Vector2D)window.ViewportPixelSize).IsNearlyEqual(new Vector2D(
-0.25f, 0.740625f)));
Assert.AreEqual(camera.LookAt, camera.FromPixelSpace((Vector2D)window.ViewportPixelSize / 2));
}
}
}