public void ParticleIntegrationDoesNothingWhenNoForces()
{
// Arrange.
var particle = new Particle();
particle.Mass = 2f;
// Act.
particle.Integrate(1.0f);
// Assert.
Assert.That(particle.Position, Is.EqualTo(Point3D.Zero));
Assert.That(particle.Velocity, Is.EqualTo(Vector3D.Zero));
Assert.That(particle.Acceleration, Is.EqualTo(Vector3D.Zero));
}
public void ParticleIntegrationAltersValuesCorrectly()
{
// Arrange.
var particle = new Particle();
particle.Mass = 2f;
particle.Damping = 0.99f;
particle.AddForce(Vector3D.Forward);
// Act.
particle.Integrate(1.0f);
// Assert.
Assert.That(particle.Position, Is.EqualTo(Point3D.Zero));
Assert.That(particle.Velocity, Is.EqualTo(new Vector3D(0, 0, -0.495f)));
Assert.That(particle.Acceleration, Is.EqualTo(Vector3D.Zero));
}