public void SettingParticleMassToInvalidValueThrowsException()
{
// Arrange.
var particle = new Particle();
// Act / Assert.
Assert.Throws<ArgumentOutOfRangeException>(() => particle.Mass = 0);
}
public void ParticleMassIsInfinityWhenInverseMassIsZero()
{
// Arrange.
var particle = new Particle();
// Act.
particle.InverseMass = 0f;
// Assert.
Assert.That(particle.Mass, Is.EqualTo(float.PositiveInfinity));
}
public void CanSetAndGetParticleMass()
{
// Arrange.
var particle = new Particle();
// Act.
particle.Mass = 2f;
// Assert.
Assert.That(particle.Mass, Is.EqualTo(2));
}
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));
}
public void AddParticle(Particle particle)
{
_particles.Add(particle);
}