Velocity2D Class

Delta Engine Documentation

Component and Update for any Entity moving around in 2D space with velocity limited to a maximum value. It can be accelerated (or decelerated, which is the same) by a vector, by magnitude and direction, or by a scalar factor to its current speed. View code on GitHub

Inheritance Hierarchy

System Object
DeltaEngine.Physics2D Velocity2D

Namespace: DeltaEngine.Physics2D
Assembly: DeltaEngine.Physics2D (in DeltaEngine.Physics2D.dll) Version: 1.1.1.0 (1.1.1)

Syntax

C++

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public class Velocity2D

public class Velocity2D

Public Class Velocity2D

Public Class Velocity2D

public ref class Velocity2D

public ref class Velocity2D

type Velocity2D =  class end

type Velocity2D =  class end

The Velocity2D type exposes the following members.

Constructors

	Name	Description
	Velocity2D	Initializes a new instance of the Velocity2D class

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Remarks

Tests: DeltaEngine.Physics2D.Tests.Velocity2DTests

Examples

7 unit tests call DeltaEngine.Physics2D.Velocity2D

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[Test]
public void ApplyUpdateWithVelocity()
{
    var entity2D = new Entity2D(new Rectangle(0, 0, 1, 1));
    entity2D.Add(velocity);
    entity2D.Start<Velocity2D.PositionUpdate>();
    var originalPosition = entity2D.Center;
    entity2D.Get<Velocity2D.Data>().Accelerate(2.0f, 90.0f);
    AdvanceTimeAndUpdateEntities();
    Assert.AreNotEqual(originalPosition, entity2D.Center);
}

[Test]
public void ApplyUpdateWithVelocity()
{
    var entity2D = new Entity2D(new Rectangle(0, 0, 1, 1));
    entity2D.Add(velocity);
    entity2D.Start<Velocity2D.PositionUpdate>();
    var originalPosition = entity2D.Center;
    entity2D.Get<Velocity2D.Data>().Accelerate(2.0f, 90.0f);
    AdvanceTimeAndUpdateEntities();
    Assert.AreNotEqual(originalPosition, entity2D.Center);
}

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[Test]
public void AccelerateByPoint()
{
    velocity.Accelerate(Vector2D.One);
    Assert.AreEqual(Vector2D.One, velocity.Velocity);
}

[Test]
public void AccelerateByPoint()
{
    velocity.Accelerate(Vector2D.One);
    Assert.AreEqual(Vector2D.One, velocity.Velocity);
}

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[Test]
public void AccelerateByPointExceedingMaximum()
{
    velocity.Accelerate(new Vector2D(6, 0));
    Assert.AreEqual(5, velocity.Velocity.X);
    Assert.AreEqual(0, velocity.Velocity.Y);
}

[Test]
public void AccelerateByPointExceedingMaximum()
{
    velocity.Accelerate(new Vector2D(6, 0));
    Assert.AreEqual(5, velocity.Velocity.X);
    Assert.AreEqual(0, velocity.Velocity.Y);
}