Revision antes de D

   //////////////////////////////////////////
      //SISTEMA SOLAR POR MANUEL PATIÑO LOPEZ//
      ///////////////////////               //
                          //REVISION 2/4/16//
                         ///////////////////

    //INICIO DEL PROGRAMA

    var createScene = function() {
	var scene = new BABYLON.Scene(engine);
	var camera = new BABYLON.ArcRotateCamera("Camera", 0, Math.PI / 2, 12, BABYLON.Vector3.Zero(), scene);

	camera.attachControl(canvas, false);



     //LUCES

     var light0 = new BABYLON.PointLight("Omni0", new BABYLON.Vector3(0, 0, 0), scene);
     light0.diffuse = new BABYLON.Color3(1, 01, 01);
     light0.specular = new BABYLON.Color3(1, 1, 1);
     var light0 = new BABYLON.HemisphericLight("Hemi0", new BABYLON.Vector3(0, 1, 0), scene);



    //VARIABLES DE PLANETAS TAMAÑOS, ETC

    var sol = BABYLON.Mesh.CreateSphere('sphere1', 16, 200, scene); //POR FINES DIDACTICOS TOMAMOS EL RADIO DEL SOL A 200
	var mercurio = BABYLON.Mesh.CreateSphere('sphere1', 16, 2.4, scene);//POR FINES DIDACTICOS LA ESCALA SERA RADIO/1000
    var venus = BABYLON.Mesh.CreateSphere('sphere1', 6, 6, scene);
	var tierra = BABYLON.Mesh.CreateSphere('sphere1', 6, 6.37, scene);
	var marte = BABYLON.Mesh.CreateSphere('sphere1', 6, 3.39, scene);
	var jupiter = BABYLON.Mesh.CreateSphere('sphere1', 6, 71.4, scene);
	var saturno = BABYLON.Mesh.CreateSphere('sphere1', 6, 60.26, scene);
	var urano= BABYLON.Mesh.CreateSphere('sphere1', 6, 25.5, scene);
	var neptuno = BABYLON.Mesh.CreateSphere('sphere1', 6, 24.7, scene);

	// TEXTURAS?¿

	sol.material = new BABYLON.StandardMaterial("texture1", scene);
	sol.material.ambientTexture = new BABYLON.Texture("grass.png", scene);


	//Posiciones iniciales

	sol.position.x = 0
	sol.position.y = 6.5




    // Animacion MERCURIO

	var alpha = 0;
	scene.registerBeforeRender(function () {
	mercurio.rotation.x += 0.01;
	mercurio.rotation.z += 0.02;
	mercurio.position = new BABYLON.Vector3(Math.cos(alpha) *257, 10, Math.sin(alpha) * 257);
	alpha += 0.01605479452 //ALREDEDOR DE 87 DIAS TERRESTRES

	});


	//Animacion VENUS

	var beta = 0;
	scene.registerBeforeRender(function () {
	venus.rotation.x += 0.01;
	venus.rotation.z += 0.02;
	venus.position = new BABYLON.Vector3(Math.cos(beta) *308, 10, Math.sin(beta) * 308);
	beta += 0.06136986301 ;//ALREDEDOR DE 254 DIAS TERRESTRES
	});


	//Animacion TIERRA

	 var gamma = 0;
	 scene.registerBeforeRender(function () {
     tierra.rotation.x += 0.01;
	 tierra.rotation.z += 0.02;
	 tierra.position = new BABYLON.Vector3(Math.cos(gamma) *349, 10, Math.sin(gamma) * 349);
	 gamma += 0.0001;//ALREDEDOR DE 365 DIAS

	 });


	//Animacion MARTE
	var delta = 0;
	marte.registerBeforeRender(function () {
	marte.rotation.x += 0.01;
	marte.rotation.z += 0.02;
	marte.position = new BABYLON.Vector3(Math.cos(delta) *427, 10, Math.sin(delta) * 427);
	delta += 0.000686;//ALREDEDOR DE 686 DIAS

	});


	//Animacion JUPITER
	var epsilon = 0;
	scene.registerBeforeRender(function () {
    jupiter.rotation.x += 0.01;
	jupiter.rotation.z += 0.02;
	jupiter.position = new BABYLON.Vector3(Math.cos(epsilon) *998, 10, Math.sin(epsilon) * 998);
	epsilon += 0.004379;// ALREDEDOR DE 4379 DIAS

	});


	//Animacion SATURNO

	 var dseta = 0;
	 scene.registerBeforeRender(function () {
	 saturno.rotation.x += 0.01;
	 saturno.rotation.z += 0.02;
	 saturno.position = new BABYLON.Vector3(Math.cos(dseta) *1629, 10, Math.sin(dseta) * 1629);
	 dseta += 0.0010585;// ALREDEDOR DE 10585 DIAS

	});



	//Animacion URANO

	 var eta = 0;
	 scene.registerBeforeRender(function () {
	 urano.rotation.x += 0.01;
	 urano.rotation.z += 0.02;
	 urano.position = new BABYLON.Vector3(Math.cos(eta) *3070, 10, Math.sin(eta) * 3070);
	 eta += 0.0010585;// ALREDEDOR DE 10585 DIAS

	});


	//Animacion NEPTUNO

	 var dseta = 1110;
	 scene.registerBeforeRender(function () {
	 neptuno.rotation.x += 0.01;
	 neptuno.rotation.z += 0.02;
	 neptuno.position = new BABYLON.Vector3(Math.cos(dseta) *4704, 10, Math.sin(dseta) * 4704);
	 dseta += 0.0010585;// ALREDEDOR DE 10585 DIAS
	});



	//PLUTON NO EXISTE




	return scene;
};