// Start is called before the first frame update
void Start()
{
_orbitMotion = GetComponent <OrbitMotion>();
_trajectoriesContainer = transform.parent.Find("Trajectories");
_ellipse = Instantiate(TrajectoryGameObject, _trajectoriesContainer).GetComponent <EllipseRenderer>();
_ellipse.ellipse = _orbitMotion.orbitPath;
_ellipse.CalculateEllipse();
}
private void OrbitParameters()
{
if (!moving)
{
return;
}
Vector3 r = orbitingBody.transform.position - transform.position;
radius = Vector3.Distance(orbitingBody.transform.position, transform.position);
float mass1 = rb.mass;
float mass2 = orbitingBody.GetComponent <Rigidbody>().mass;
float micro = g * mass2;
keneticEnergy = mass1 * velocity.magnitude * velocity.magnitude / 2;
potenetialEnergy = g * mass2 * mass1 / r.magnitude;
Energy = mass1 * velocity.magnitude * velocity.magnitude / 2 - g * mass2 * mass1 / r.magnitude;
float l = Vector3.Cross(velocity, r).magnitude;
init_energy = Energy;
float a = -g * mass2 * mass1 / (2 * Energy);
float T = (float)Math.Sqrt(4 * Math.PI * Math.PI * a * a * a / (g * mass2));
float e = (float)Math.Sqrt(1 + 2 * Energy * l * l / (mass1 * mass1 * mass1 * micro * micro));
ecentricity = e;
float per = (l * l / (mass1 * micro)) * (1 / (1 + e * (float)Math.Cos(0)));
apoapsis = (l * l / (mass1 * micro)) * (1 / (1 + e * (float)Math.Cos(Math.PI)));
periapsis = per;
//Does work if sat mass is not 1
orbital_period = T;
semiMajor = (apoapsis + periapsis) / 2;
semiMinor = Mathf.Sqrt(semiMajor * semiMajor * (1 - e * e));
float radi = radius;
theta = Mathf.Acos(l * l / (radi * mass1 * mass1 * micro * e) - 1 / e);
beta = Mathf.Acos(Vector3.Dot(new Vector3(1, 0, 0), r) / r.magnitude);
//theta = Mathf.Acos(l * l / (apoapsis * mass1 * mass1 * micro * e) - 1 / e);
print(Mathf.Rad2Deg * theta);
print(theta);
Vector3 p2 = new Vector3(radius * Mathf.Cos(theta), 0, radius * Mathf.Sin(Mathf.PI + theta));
//true if ccw (negative ccw)
renderer.ellipse.orbitSide = -1f;
print(Vector3.Dot(Vector3.Cross(r, velocity), new Vector3(0, 1, 0)));
float orbitSide = 1;
float clockWise = 1;
ccw = Vector3.Dot(Vector3.Cross(r, velocity), new Vector3(0, 1, 0)) > 0;
if (ccw)
{
clockWise *= -1;
//renderer.ellipse.orbitSide = 1f;
//p2 = new Vector3(radius * Mathf.Cos(theta), 0, radius * Mathf.Sin(theta));
//renderer.ellipse.orbitSide *= -1f;
//true if descending
if (Vector3.Dot(r, velocity) > 0)
{
orbitSide = -1;
}
}
else
{
orbitSide = -1;
if (Vector3.Dot(r, velocity) > 0)
{
orbitSide = 1;
}
}
//theta *= clockWise;
theta *= orbitSide;
beta *= -Mathf.Sign(r.z);
//renderer.ellipse.offsetAngle = -beta + theta - Mathf.PI;
renderer.ellipse.offsetAngle = -beta + Mathf.PI - theta;
//theta = Mathf.Acos((2 * radius * radius - Vector3.Distance(transform.position, p2)*Vector3.Distance(transform.position, p2)) /
// (2 * radius * radius));
//theta = Mathf.Acos((2 * radius * radius - Vector3.Distance(transform.position, p2)*Vector3.Distance(transform.position, p2)) / (2 * radius * radius));
print(Mathf.Rad2Deg * theta);
print(theta);
//print(Mathf.Rad2Deg* theta);
renderer.ellipse.offsetPoint = orbitingBody.transform.position;
renderer.ellipse.xAxis = semiMajor;
renderer.ellipse.yAxis = semiMinor;
renderer.ellipse.offset.x = orbitingBody.transform.position.x - semiMajor + periapsis;
renderer.ellipse.offset.y = orbitingBody.transform.position.z;
renderer.CalculateEllipse();
theta = Mathf.Rad2Deg * theta;
beta = Mathf.Rad2Deg * beta;
//What position in the orbit am I in? How do I return a future x,y cord?
}