public static OpenGLVisualization TwoBody()
{
var sunLight = LightSource.Directional(new Vector3(1, -1, 1));
sunLight.CastsDynamicShadows = true;
var spotLight = LightSource.SpotLight(new Vector3(-1.5, 5, -1.5), new Vector3(0, -1, 0), Math.PI / 16);
spotLight.CastsDynamicShadows = true;
var floorGraphic = new MoveableBody(FlatFactory.NewCuboid(5.0, 1.0, 5.0).NewColor(Color.Gray))
{
Translation = new Vector3(0, -0.5, 0)
};
var uni = SampleUniverses.SunEarth(0.75, 1.0, 0.75);
var sunGraphic = new BasicGraphicalBody(uni.Bodies.First(), SphereFactory.NewSphere(0.4, 3)).NewColor(Color.DodgerBlue);
var earthGraphic = new BasicGraphicalBody(uni.Bodies.Skip(1).First(), SphereFactory.NewSphere(0.2, 3));
var moonGraphic = new BasicGraphicalBody(uni.Bodies.Skip(2).First(), SphereFactory.NewSphere(0.05, 3));
var vis = new OpenGLVisualization(new IGraphicalBody[] { floorGraphic, sunGraphic, earthGraphic, moonGraphic }, true, sunLight, spotLight);
var physicsRunner = new RealTimePhysicsRunner(uni);
vis.Input.InputEvents.Where(inpt => inpt.Input == InputType.Pause && inpt.State == InputState.Start).Subscribe(inpt => physicsRunner.TogglePause());
vis.Input.InputEvents.Where(inpt => inpt.Input == InputType.SpeedUp && inpt.State == InputState.Start).Subscribe(inpt => physicsRunner.TimeMultiplier *= 2);
vis.Input.InputEvents.Where(inpt => inpt.Input == InputType.SlowDown && inpt.State == InputState.Start).Subscribe(inpt => physicsRunner.TimeMultiplier *= 0.5);
vis.Input.InputEvents.Where(inpt => inpt.Input == InputType.Exit).Subscribe(inpt => vis.EndVis());
vis.VisStarted += (sender, e) => physicsRunner.StartPhysics();
return(vis);
}