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Eccentric around linear gravity = tracking orbit

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Nick 2022-05-10 01:15:53 -04:00
parent 48479f87d8
commit 2c561d7c19
3 changed files with 25 additions and 13 deletions
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26
NewHorizons/Builder/Orbital/OrbitlineBuilder.cs
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@ -35,17 +35,25 @@ namespace NewHorizons.Builder.Orbital
var parentGravity = astroObject.GetPrimaryBody()?.GetGravityVolume(); var parentGravity = astroObject.GetPrimaryBody()?.GetGravityVolume();
NHOrbitLine orbitLine = orbitGO.AddComponent<NHOrbitLine>(); OrbitLine orbitLine;
if(parentGravity?.GetFalloffExponent() == 1 && ecc != 0)
{
orbitLine = orbitGO.AddComponent<TrackingOrbitLine>();
}
else
{
orbitLine = orbitGO.AddComponent<NHOrbitLine>();
var a = astroObject.SemiMajorAxis; var a = astroObject.SemiMajorAxis;
var e = astroObject.Eccentricity; var e = astroObject.Eccentricity;
var b = a * Mathf.Sqrt(1f - (e * e)); var b = a * Mathf.Sqrt(1f - (e * e));
var l = astroObject.LongitudeOfAscendingNode; var l = astroObject.LongitudeOfAscendingNode;
var p = astroObject.ArgumentOfPeriapsis; var p = astroObject.ArgumentOfPeriapsis;
var i = astroObject.Inclination; var i = astroObject.Inclination;
orbitLine.SemiMajorAxis = a * OrbitalParameters.Rotate(Vector3.left, l, i, p); (orbitLine as NHOrbitLine).SemiMajorAxis = a * OrbitalParameters.Rotate(Vector3.left, l, i, p);
orbitLine.SemiMinorAxis = b * OrbitalParameters.Rotate(Vector3.forward, l, i, p); (orbitLine as NHOrbitLine).SemiMinorAxis = b * OrbitalParameters.Rotate(Vector3.forward, l, i, p);
}
var color = Color.white; var color = Color.white;
if (config.Orbit.Tint != null) color = config.Orbit.Tint.ToColor32(); if (config.Orbit.Tint != null) color = config.Orbit.Tint.ToColor32();

11
NewHorizons/Components/Orbital/OrbitalParameters.cs
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@ -30,6 +30,13 @@ namespace NewHorizons.Components.Orbital
orbitalParameters.LongitudeOfAscendingNode = longitudeOfAscendingNode; orbitalParameters.LongitudeOfAscendingNode = longitudeOfAscendingNode;
orbitalParameters.Eccentricity = eccentricity; orbitalParameters.Eccentricity = eccentricity;
orbitalParameters.ArgumentOfPeriapsis = argumentOfPeriapsis; orbitalParameters.ArgumentOfPeriapsis = argumentOfPeriapsis;
// If primary gravity is linear and the orbit is eccentric its not even an ellipse so theres no true anomaly
if(primaryGravity.Power == 1 && eccentricity != 0)
{
trueAnomaly = 0;
}
orbitalParameters.TrueAnomaly = trueAnomaly; orbitalParameters.TrueAnomaly = trueAnomaly;
// Have to calculate the rest // Have to calculate the rest
@ -81,9 +88,7 @@ namespace NewHorizons.Components.Orbital
var x = r * Mathf.Cos(f); var x = r * Mathf.Cos(f);
var y = r * Mathf.Sin(f); var y = r * Mathf.Sin(f);
var n_p = new Vector2(x, y).normalized; var dir = Rotate(new Vector3(x, 0f, y).normalized, longitudeOfAscendingNode, inclination, argumentOfPeriapsis);
var dir = Rotate(new Vector3(n_p.x, 0f, n_p.y).normalized, longitudeOfAscendingNode, inclination, argumentOfPeriapsis);
var up = Rotate(Vector3.up, longitudeOfAscendingNode, inclination, argumentOfPeriapsis); var up = Rotate(Vector3.up, longitudeOfAscendingNode, inclination, argumentOfPeriapsis);
var pos = r * dir; var pos = r * dir;

1
NewHorizons/Components/Orbital/TrackingOrbitLine.cs
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@ -15,7 +15,6 @@ namespace NewHorizons.Components.Orbital
public float TrailTime = 120f; public float TrailTime = 120f;
public override void InitializeLineRenderer() public override void InitializeLineRenderer()
{ {
_lineRenderer.positionCount = this._numVerts; _lineRenderer.positionCount = this._numVerts;