apply elements.nu as satellite true anomaly on init

src/main.cpp

@@ -217,12 +217,10 @@ loadOrbit(GameState* gs,
 	orbit->ellipse_entity =
 		initEllipseEntity(rs, orbit, DEFAULT_ORBIT_VERTICES);
 	setEntityPosition(orbit->ellipse_entity, vec3(0, 0, 0));
-	rotateEntity(orbit->ellipse_entity, vec3(1, 0, 0), (float) M_PI / 2);
 
 	orbit->satellite_entity = initSatelliteEntity(rs, sat_name);
 	scaleEntity(orbit->satellite_entity, 1 / SCALING);
-	setEntityPosition(orbit->satellite_entity,
-			orbit->e3d.vertices[0]);
+	setEntityPosition(orbit->satellite_entity, orbit->system.sat.position);
 
 	return orbit;
 }
@@ -246,9 +244,9 @@ loadScene(GameState* gs, RenderState* rs)
 
 	gs->coord_overlay = addCoordinateOverlay(rs);
 
-	OrbitalElements el = orbitInit(8000, 0, 0, 0, 0, 0);
+	OrbitalElements el = orbitInit(8000, 0, 0, 0, 0, DEG2RAD(-90));
 	GameOrbit* go_1 = loadOrbit(gs, rs, body, el, rg, "sat_01");
-	addManeuver(go_1, ImpulseType::PROGRADE, DEG2RAD(-90), 0.4);
+	addManeuver(go_1, ImpulseType::PROGRADE, DEG2RAD(180), 1);
 
 	return true;
 }

src/orbits.cpp

@@ -17,6 +17,12 @@ systemInit(TwoBodySystem& system, GravBody gb, OrbitalElements el)
 	system.r_periapsis = system.ep.a - system.ep.c;
 	system.r_apoapsis = 2 * system.ep.a - system.r_periapsis;
 	system.rotation = orbitGetXForm(el);
+
+	system.sat.theta = el.nu;
+	system.sat.r = orbitGetRadialDistance(system.ep.e, system.ep.p, el.nu);
+	system.sat.v = orbitGetVelocity(system.epsilon, gb.mu, system.sat.r);
+	system.sat.position =
+		system.rotation * orbitGetPositionVector(system.sat.r, el.nu);
 }
 
 GravBody