Camera2DScreenSpace.FromPixelSpace Method (Vector2D)

Camera2DScreenSpace FromPixelSpace Method (Vector2D)

Delta Engine Documentation

Namespace: DeltaEngine.ScreenSpaces
Assembly: DeltaEngine (in DeltaEngine.dll) Version: 1.1.1.0 (1.1.1)

Syntax

public override Vector2D FromPixelSpace(
	Vector2D pixelPosition
)

public override Vector2D FromPixelSpace(
	Vector2D pixelPosition
)

Public Overrides Function FromPixelSpace ( 
	pixelPosition As Vector2D
) As Vector2D

Public Overrides Function FromPixelSpace ( 
	pixelPosition As Vector2D
) As Vector2D

public:
virtual Vector2D FromPixelSpace(
	Vector2D pixelPosition
) override

public:
virtual Vector2D FromPixelSpace(
	Vector2D pixelPosition
) override

abstract FromPixelSpace : 
        pixelPosition : Vector2D -> Vector2D 
override FromPixelSpace : 
        pixelPosition : Vector2D -> Vector2D

abstract FromPixelSpace : 
        pixelPosition : Vector2D -> Vector2D 
override FromPixelSpace : 
        pixelPosition : Vector2D -> Vector2D

Parameters

pixelPosition: Type: DeltaEngine.Datatypes Vector2D

Return Value

Type: Vector2D

Remarks

Tests: DeltaEngine.Tests.ScreenSpaces.Camera2DScreenSpaceTests

Examples

3 unit tests call DeltaEngine.ScreenSpaces.Camera2DScreenSpace.FromPixelSpace(DeltaEngine.Datatypes.Vector2D)

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[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 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))));
}

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[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 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)));
}

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[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));
}

[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));
}