/SolarSystem.Wpf/OrbitsController.cs

using SharpGL;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;



namespace SolarSystem.Wpf

{

    public class OrbitsController

    {

        public Boolean AllOrbitsComplete { get { return orbits.Values.All(o => o.IsClosed); } }



        private System system;

        private Normalizer normalizer;

        private Dictionary<Body, Orbit> orbits;



        public OrbitsController(System system, Normalizer normalizer)

        {

            this.system = system;

            this.normalizer = normalizer;



            orbits = new Dictionary<Body, Orbit>();



            foreach (var body in system.Bodies)

                orbits.Add(body, new Orbit());

        }



        public void RecordPositions()

        {

            foreach (var body in system.Bodies)

                orbits[body].AddPoint(body.Position);

        }



        public void Render(OpenGL gl)

        {

            foreach (var body in system.Bodies)

                DrawOrbit(gl, body);

        }



        private void DrawOrbit(OpenGL gl, Body body)

        {

            gl.Color(1f, 0.84f, 0f);

            gl.Begin(OpenGL.GL_LINE_STRIP);



            foreach (var position in orbits[body].Points)

                gl.Vertex(normalizer.NormalizePosition(position[0]), 0, normalizer.NormalizePosition(position[1]));



            gl.End();

        }

    }

}