public void TestApplyTo()
{
var force = new ParticleDrag(0.1, 0.1);
var particle = new Particle
{
Mass = 1
};
force.Add(particle);
force.Apply(1);
particle.Update(1);
Assert.AreEqual(new Vector2D(0, 0), particle.Acceleration, "速度为0的物体不受阻力影响");
particle.Velocity = new Vector2D(1, 0);
force.Apply(1);
particle.Update(1);
Assert.AreEqual(new Vector2D(-0.2, 0), particle.Acceleration, "速度不为0的物体按照公式计算阻力大小");
}
public void TestConstructor()
{
var force = new ParticleDrag(0.1, 0.1);
Assert.IsNotNull(force);
}
