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Fix initial velocity direction

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This commit is contained in:
Nick 2022-05-10 15:48:16 -04:00
parent f85c3ca825
commit e20b8ff737
2 changed files with 9 additions and 4 deletions
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9
NewHorizons/Components/Orbital/OrbitalParameters.cs
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@ -88,11 +88,16 @@ 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);
// Forgot to take the derivative of r as well with respect to f
var denominator = Mathf.Pow(eccentricity * Mathf.Cos(f) + 1, 2);
var dx = -p * Mathf.Sin(f) / denominator;
var dy = p * (eccentricity + Mathf.Cos(f)) / denominator;
var dir = Rotate(new Vector3(x, 0f, y).normalized, longitudeOfAscendingNode, inclination, argumentOfPeriapsis); var dir = Rotate(new Vector3(x, 0f, y).normalized, longitudeOfAscendingNode, inclination, argumentOfPeriapsis);
var up = Rotate(Vector3.up, longitudeOfAscendingNode, inclination, argumentOfPeriapsis); var velocityDir = Rotate(new Vector3(dx, 0f, dy).normalized, longitudeOfAscendingNode, inclination, argumentOfPeriapsis);
var pos = r * dir; var pos = r * dir;
var vel = v * Vector3.Cross(dir, up).normalized; var vel = v * velocityDir;
orbitalParameters.InitialPosition = pos; orbitalParameters.InitialPosition = pos;
orbitalParameters.InitialVelocity = vel; orbitalParameters.InitialVelocity = vel;

4
NewHorizons/Handlers/PlanetCreationHandler.cs
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@ -521,9 +521,9 @@ namespace NewHorizons.Handlers
var primaryGravity = new Gravity(primaryBody.GetGravityVolume()); var primaryGravity = new Gravity(primaryBody.GetGravityVolume());
var secondaryGravity = new Gravity(secondaryBody.GetGravityVolume()); var secondaryGravity = new Gravity(secondaryBody.GetGravityVolume());
var relativePosition = body.Config.Orbit.GetOrbitalParameters(primaryGravity, secondaryGravity).InitialPosition; var orbit = body.Config.Orbit;
go.transform.position = relativePosition + primaryBody.transform.position; go.transform.position = orbit.GetOrbitalParameters(primaryGravity, secondaryGravity).InitialPosition + primaryBody.transform.position;
} }
else else
{ {