Difference between revisions of "API:CelestialBody"

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(Created page with "A CelestialBody represents a planet, moon, or star that acts as a source of gravity and has some sphere of influence. You can find the CelestialBody whose sphere of influence ...")
 
 
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A CelestialBody represents a planet, moon, or star that acts as a source of gravity and has some sphere of influence. You can find the CelestialBody whose sphere of influence you are currently in with the vessel.mainBody field.
+
{{class
 +
|name=CelestialBody
 +
|summary=A CelestialBody represents a [[Celestials|planet, moon, or star]] that acts as a source of gravity and has some sphere of influence. You can find the CelestialBody whose sphere of influence you are currently in with the <code>vessel.mainBody</code> field.
 +
|inherits=UnityEngine.MonoBehaviour
 +
|implements=ITargetable, IDiscoverable
 +
}}
  
−
Useful members:
+
{{PropertiesStart}}
 +
{{Property
 +
|type=DiscoveryInfo
 +
|name=DiscoveryInfo
 +
|hasget=1
 +
}}
  
−
double GetAltitude(Vector3d worldPos) --the altitude above sea level of a given world position, in meters.
+
{{Property
 +
|type=int
 +
|name=flightsGlobalIndex
 +
|hasget=1
 +
|hasset=1
 +
|desc=The place the body has in the list <code>FlightGlobals.Bodies</code>
 +
}}
  
−
double GetLatitude(Vector3d worldPos) --the latitude of a given world position, in degrees.
+
{{Property
 +
|type=string
 +
|name=name
 +
|hasget=1
 +
|desc=The name of the body, as it appears in e.g. the map view. Same as <code>bodyName</code> field.
 +
}}
  
−
double GetLongitude(Vector3d worldPos) -- the longitude of a given world position, in degrees. The returned value doesn't seem to stay in any particular range. It may be > 360 or < 0. Probably you'll want to do some modulo arithmetic to force this into a certain range like -180 to 180 or 0 to 360.
+
{{Property
 +
|type=Orbit
 +
|name=orbit
 +
|hasget=1
 +
|desc=Contains all information about the body's orbit around whatever other body it is orbiting.
 +
}}
  
−
Vector3d GetRFrmVel(Vector3d worldPos) -- The reference frame of the planet's surface rotates with respect to an inertial reference frame. For example, a ship landed on the planet's surface is actually moving with respect to an inertial frame, because the planet is rotating. This function gives the difference between a velocity in the rotating frame and the same velocity in the inertial frame. You can use it to convert an inertial frame velocity (like the one returned by Orbit.GetVel()) to a rotating frame velocity by (rotating frame velocity) = (inertial frame velocity) - body.GetRFrmVel(position).  
+
{{Property
 +
|type=Vector3d
 +
|name=position
 +
|hasget=1
 +
|hasset=1
 +
|desc=The position of the center of the body in world space.
 +
}}
  
−
Vector3d GetSurfaceNVector(double lat, double lon) -- Returns a unit vector that is normal to the sphere of the planet at the given latitude and longitude.
+
{{Property
 +
|type=CelestialBody
 +
|name=referenceBody
 +
|hasget=1
 +
|desc=The celestial body that this one orbits.
 +
}}
  
−
Vector3d GetWorldSurfacePosition(double lat, double lon, double alt) -- Probably this returns the world position corresponding to a given latitude, longitude, and altitude above sea level, but I haven't actually tried it.
+
{{Property
 +
|type=Texture2D
 +
|name=ResourceMap
 +
|hasget=1
 +
}}
  
−
string name { get; } -- The name of the body, as it appears in e.g. the map view.
+
{{Property
 +
|type=PResource
 +
|name=Resources
 +
|hasget=1
 +
}}
  
−
Vector3d position { get; set; } -- The position of the center of the body in world space.
+
{{Property
 +
|type=string
 +
|name=theName
 +
|hasget=1
 +
|desc=Body's name preceded by appropriate article ("the" or nothing)
 +
}}
  
−
double Mass -- the mass of the body, in KSP's arbitrary mass units. For calculating gravity, KSP seems to use a gravitational constant of G = 6.674E-11 (SI units), which is the same as the real one rounded to 3 decimal places.
+
{{PropertiesEnd}}
  
−
double gravParamter -- This is probably equal to G * Mass, but I haven't tried it.
 
  
−
double maxAtmosphereAltitude -- the maximum height of the atmosphere above sea level, in meters.
 
  
−
Orbit orbit -- contains all information about the body's orbit around whatever other body it is orbiting.
+
{{FieldsStart}}
  
−
List<CelestialBody> orbitingBodies -- a list of all the bodies that orbit this one (e.g., the moons of a planet)
+
{{Field|type=float|name=altitudeMultiplier}}
 +
{{Field|type=float|name=altitudeOffset}}
  
−
double Radius - the radius of the planet in meters. This defines sea level.
+
{{Field
 +
|type=double
 +
|name=angularV
 +
|desc=The magnitude of <code>angularVelocity</code>
 +
}}
  
 +
{{Field
 +
|type=Vector3d
 +
|name=angularVelocity
 +
|desc=Similar to <code>zUpAngularVelocity</code>: [[w:Rotation_formalisms_in_three_dimensions#Euler_axis_and_angle_.28rotation_vector.29|Rotation vector]], with y and z axes swapped
 +
}}
  
−
The above lists only the members that someone has figured out how to use and written an explanation for. For completeness, here's a list of the remaining members of the CelestialBody class. If you figure out what they do, add an explanation above!
 
  
−
Bounds getBounds()
+
{{Field
−
Vector3d GetFrameVel()
+
|type=bool
−
Vector3d GetRelSurfacePosition(double lat, double lon, double alt)
+
|name=atmosphere
−
float altitudeMultiplier
+
|desc=Whether the body has an atmosphere
−
float altitudeOffset
+
}}
−
double angularV
+
 
−
Vector3d angularVelocity
+
{{Field
−
float atmosphereTemperatureMultiplier
+
|type=bool
−
bool atmosphere
+
|name=atmosphereContainsOxygen
−
double atmosphereScaleHeight
+
|desc=Whether oxygen is available (for jet engines)
−
Color atmosphericAmbientColor
+
}}
−
double defaultSOI
+
 
−
double directRotAngle
+
 
−
double GeeASL
+
{{Field|type=Color|name=atmosphericAmbientColor}}
−
double gMagnitudeAtCenter
+
 
−
double hillSphere
+
{{Field|type=Float|name=atmosphereDepth}}
−
double initialRotation
+
{{Field|type=bool|name=atmosphereUsePressureCurve}}
−
double inverseRotation
+
{{Field|type=bool|name=atmospherePressureCurveIsNormalized}}
−
double inverseRotThresholdAltitude
+
 
−
bool ocean
+
{{Field
−
PQS pqsController
+
|type=float
−
AnimationCurve pressureCurve
+
|name=.atmospherePressureSeaLevel
−
float pressureMultiplier
+
|desc=Pressure at sea level (atm)
−
bool rotates
+
}}
−
QuaternionD rotation
+
 
−
double rotationAngle
+
{{Field|type=Float|name=atmosphereTemperatureLapseRate}}
−
double rotationPeriod
+
{{Field|type=Float|name=atmosphereGasMassLapseRate}}
−
double sphereOfInfluence
+
 
−
double staticPressureASL
+
{{Field|type=CBAttributeMap|name=BiomeMap}}
−
AnimationCurve temperatureCurve
+
 
−
PlanetQuadTreeController terrainController
+
{{Field
−
bool tidallyLocked
+
|type=string
−
bool use_The_InName
+
|name=bodyName
−
bool useLegacyAtmsophere
+
|desc=Same as the <code>name</code> property
−
Vector3d zUpAngularVelocity
+
}}
 +
 
 +
{{Field|type=Transform|name=bodyTransition}}
 +
 
 +
{{Field|type=CelestialBodyType|name=bodyType}}
 +
 
 +
{{Field|type=double|name=directRotAngle}}
 +
 
 +
{{Field
 +
|type=double
 +
|name=GeeASL
 +
|desc=Gravity At Sea Level; in multiple of g (aka “gees”) the gravity at sea level on Kerbin, defined as 9.81 m/s²
 +
}}
 +
 
 +
{{Field
 +
|type=double
 +
|name=gMagnitudeAtCenter
 +
|desc=Same as <code>gravParameter</code> (below)
 +
}}
 +
 
 +
{{Field
 +
|type=double
 +
|name=gravParameter
 +
|desc=[[w:Standard gravitational parameter|Gravitational parameter]] (G × Mass), computed as <math>\mbox{GeeASL} \times g \times \mbox{Radius}^2</math> where g = 9.81.
 +
}}
 +
 
 +
{{Field
 +
|type=double
 +
|name=hillSphere
 +
|desc=Radius of body's [[w:Hill sphere|Hill sphere]] computed as <math>R_H = a (1-e) \left(\frac{M_{\mathrm{planet}}}{M_\star}\right)^{1/3}</math>.
 +
}}
 +
 
 +
{{Field|type=double|name=initialRotation}}
 +
 
 +
{{Field|type=bool|name=inverseRotation}}
 +
 
 +
{{Field|type=float|name=inverseRotThresholdAltitude}}
 +
 
 +
{{Field
 +
|type=double
 +
|name=Mass
 +
|desc=body's mass (kg), computed as M = µ/G where µ is the body's gravitational parameter (<code>gravParameter</code>) and G=6.674e-11 N⋅m²⋅kg⁻² (instead of G=6.67384e-11 N⋅m²⋅kg⁻²)
 +
}}
 +
 
 +
{{Field
 +
|type=double
 +
|name=maxAtmosphereAltitude
 +
|desc=Used when useLegacyAtmosphere is False; atmosphere top altitude (m)
 +
}}
 +
 
 +
{{Field|type=bool|name=ocean}}
 +
 
 +
{{Field|type=OrbitDriver|name=orbitDriver}}
 +
 
 +
{{FieldTemplate
 +
|type=List
 +
|templateType=CelestialBody
 +
|name=orbitingBodies
 +
|desc=A list of all the bodies that orbit this one (e.g., the moons of a planet)
 +
}}
 +
 
 +
{{Field
 +
|type=PQS
 +
|name=pqsController
 +
|desc=An object that can give you information about the planet's terrain height as a function of position. See the documentation on the <code>PQS</code> class to see how to use it.
 +
}}
 +
 
 +
{{Field
 +
|type=AnimationCurve
 +
|name=pressureCurve
 +
|desc=Used when <code>useLegacyAtmosphere</code> is False; <code>AnimationCurve</code> mapping some altitudes (m) to pressure ratios (atm); actual pressure is obtained by multiplying by pressureMultiplier
 +
}}
 +
 
 +
{{Field
 +
|type=float
 +
|name=pressureMultiplier
 +
|desc=Used when <code>useLegacyAtmosphere</code> is False; linear factor in pressure (non-zero only on Kerbol, where it is set to 1000000)
 +
}}
 +
 
 +
{{Field
 +
|type=double
 +
|name=Radius
 +
|desc=The radius of the planet in meters. This defines sea level.
 +
 
 +
}}
 +
{{Field|type=bool|name=rotates}}
 +
 
 +
{{Field|type=QuaternionD|name=rotation}}
 +
 
 +
{{Field
 +
|type=double
 +
|name=rotationAngle
 +
|desc=The current angle of the body's rotation
 +
}}
 +
 
 +
{{Field
 +
|type=double
 +
|name=rotationPeriod
 +
|desc=How long it takes the planet to revolve once about its axis, in seconds.
 +
}}
 +
 
 +
{{Field|type=CelestialBodyScienceParams|name=scienceValues}}
 +
 
 +
{{Field
 +
|type=double
 +
|name=sphereOfInfluence
 +
|desc=Radius of the body's [[w:Sphere of influence (astrodynamics)|sphere of influence]] (m); measured from the center of the planet, not from sea level.
 +
}}
 +
 
 +
{{Field
 +
|type=double
 +
|name=staticPressureASL
 +
|desc=?; 21.46 on Kerbol, 1 everywhere else
 +
}}
 +
 
 +
{{Field|type=AnimationCurve|name=temperatureCurve}}
 +
 
 +
{{Field|type=PlanetQuadTreeController|name=terrainController}}
 +
 
 +
{{Field
 +
|type=bool
 +
|name=tidallyLocked
 +
|desc=Whether the body is tidally locked to its primary (its rotational period is its orbital period)
 +
}}
 +
 
 +
{{Field|type=array of float|name=timeWarpAltitudeLimits}}
 +
 
 +
{{Field
 +
|type=bool
 +
|name=useLegacyAtmosphere
 +
|desc=If True, then atmospheric pressure is based on [[w:Scale height|scale height]] and atmosphere height threshold is a millionth of sea level pressure. Currently set to True for all bodies with an atmosphere.
 +
}}
 +
 
 +
{{Field
 +
|type=bool
 +
|name=use_The_InName
 +
|desc=Whether the body's name should be preceded by "the" in a sentence (e.g. "The Sun is pretty hot")
 +
}}
 +
 
 +
{{Field
 +
|type=Vector3d
 +
|name=zUpAngularVelocity
 +
|desc=[[w:Rotation_formalisms_in_three_dimensions#Euler_axis_and_angle_.28rotation_vector.29|Rotation vector]]
 +
}}
 +
 
 +
{{FieldsEnd}}
 +
{{MethodsStart}}
 +
{{Method
 +
|returntype=double
 +
|returndesc=
 +
|name=GetAltitude
 +
|args={{arg|Vector3d|worldPos}}
 +
|desc=The altitude above sea level of a given world position, in meters.
 +
}}
 +
 
 +
{{Method
 +
|returntype=Bounds
 +
|returndesc=
 +
|name=getBounds
 +
|desc=Collision sphere; larger than body, presumably to account for terrain height, atmospheric height and safety margin.
 +
}}
 +
 
 +
{{Method
 +
|returntype=double
 +
|returndesc=
 +
|name=GetLatitude
 +
|args={{arg|Vector3d|worldPos}}
 +
|desc=The latitude of a given world position, in degrees.
 +
}}
 +
 
 +
{{Method
 +
|returntype=double
 +
|returndesc=
 +
|name=GetLongitude
 +
|args={{arg|Vector3d|worldPos}}
 +
|desc=The longitude of a given world position, in degrees; value may be > 360 or < 0, you should modulo-reduce to an appropriate range (e.g. -180:180 or 0:360).
 +
}}
 +
 
 +
{{Method
 +
|returntype=string
 +
|returndesc=
 +
|name=GetName
 +
|desc=Same as <code>name</code> property.
 +
}}
 +
 
 +
{{Method
 +
|returntype=Vector3
 +
|name=GetObtVelocity
 +
|desc=Infinite loop? (version 0.23.5)
 +
}}
 +
 
 +
{{Method
 +
|returntype=Orbit
 +
|name=GetOrbit
 +
|desc=Same as <code>orbit</code>.
 +
}}
 +
 
 +
{{Method
 +
|returntype=OrbitDriver
 +
|name=GetOrbitDriver
 +
|desc=Same as <code>orbitDriver</code>.
 +
}}
 +
 
 +
{{Method
 +
|returntype=Vector3d
 +
|returndesc=
 +
|name=GetRelSurfacePosition
 +
|args={{arg|Vector3d|worldPosition}}
 +
|desc=Converts a world position into a body-relative position?
 +
}}
 +
 
 +
{{Method
 +
|returntype=Vector3d
 +
|name=GetRelSurfacePosition
 +
|args={{arg|double|lat}}, {{arg|double|lon}}, {{arg|double|alt}}
 +
|desc=Returns position in body-relative coordinates for a given longitude/latitude/altitude. Same as GetSurfaceNVector * (body radius + alt).
 +
}}
 +
 
 +
{{Method
 +
|returntype=Vector3d
 +
|returndesc=
 +
|name=getRFrmVel
 +
|args={{arg|Vector3d|worldPos}}
 +
|desc=The reference frame of the planet's surface rotates with respect to an inertial reference frame. For example, a ship landed on the planet's surface is actually moving with respect to an inertial frame, because the planet is rotating. This function gives the difference between a velocity in the rotating frame and the same velocity in the inertial frame. You can use it to convert an inertial frame velocity (like the one returned by <code>Orbit.GetVel()</code>) to a rotating frame velocity by (rotating frame velocity) = (inertial frame velocity) - <code>body.GetRFrmVel(position)</code>.
 +
}}
 +
 
 +
{{Method
 +
|returntype=Vector3d
 +
|name=GetSrfVelocity
 +
|desc=Always returns a zero vector. (as of version 0.23.5)
 +
}}
 +
 
 +
{{Method
 +
|returntype=Vector3d
 +
|returndesc=
 +
|name=GetSurfaceNVector
 +
|args={{arg|double|lat}}, {{arg|double|lon}}
 +
|desc=Returns a unit vector that is normal to the sphere of the planet at the given latitude and longitude. (Tells you which way is "up" at a given point on the planet.)
 +
}}
 +
 
 +
{{Method|returntype=Transform|name=GetTransform|desc=Same as <code>bodyTransform</code> field}}
 +
{{Method
 +
|returntype=Vector3d
 +
|returndesc=
 +
|name=GetWorldSurfacePosition
 +
|args={{arg|double|lat}}, {{arg|double|lon}}, {{arg|double|alt}}
 +
|desc=Returns the world position corresponding to a given latitude, longitude, and altitude above sea level.
 +
}}
 +
 
 +
{{Method
 +
|returntype=bool
 +
|name=HasChild
 +
|args={{arg|CelestialBody|body}}
 +
|desc=True if the given body orbits this one. Doesn't seem to need to be a <i>direct</i> orbit&mdash;can be something that orbits something that orbits this. Inverse of <code>HasParent</code>.
 +
}}
 +
 
 +
{{Method
 +
|returntype=bool
 +
|name=HasParent
 +
|args={{arg|CelestialBody|body}}
 +
|desc=True if the given body orbits is orbited by this one. Doesn't seem to need to be a <i>direct</i> orbit&mdash;can be something that's orbited by something that's orbited by this. Inverse of <code>HasChild</code>.
 +
}}
 +
 
 +
{{MethodsEnd}}
 +
 
 +
[[Category:Community API Documentation]]

Latest revision as of 23:44, 24 March 2019

CelestialBody Class

Inherits Implements
UnityEngine.MonoBehaviour ITargetable, IDiscoverable

A CelestialBody represents a planet, moon, or star that acts as a source of gravity and has some sphere of influence. You can find the CelestialBody whose sphere of influence you are currently in with the vessel.mainBody field.

Properties

The following are public properties available in CelestialBody.

Signature Description
DiscoveryInfo DiscoveryInfo { get; } ?
int flightsGlobalIndex { get; set; } The place the body has in the list FlightGlobals.Bodies
string name { get; } The name of the body, as it appears in e.g. the map view. Same as bodyName field.
Orbit orbit { get; } Contains all information about the body's orbit around whatever other body it is orbiting.
Vector3d position { get; set; } The position of the center of the body in world space.
CelestialBody referenceBody { get; } The celestial body that this one orbits.
Texture2D ResourceMap { get; } ?
PResource Resources { get; } ?
string theName { get; } Body's name preceded by appropriate article ("the" or nothing)


Fields

The following is a list of publically-accessible fields in CelestialBody. This includes protected items, which can be accessed by subclasses.

Signature Description
float altitudeMultiplier ?
float altitudeOffset ?
double angularV The magnitude of angularVelocity
Vector3d angularVelocity Similar to zUpAngularVelocity: Rotation vector, with y and z axes swapped


bool atmosphere Whether the body has an atmosphere
bool atmosphereContainsOxygen Whether oxygen is available (for jet engines)


Color atmosphericAmbientColor ?
Float atmosphereDepth ?
bool atmosphereUsePressureCurve ?
bool atmospherePressureCurveIsNormalized ?
float .atmospherePressureSeaLevel Pressure at sea level (atm)
Float atmosphereTemperatureLapseRate ?
Float atmosphereGasMassLapseRate ?
CBAttributeMap BiomeMap ?
string bodyName Same as the name property
Transform bodyTransition ?
CelestialBodyType bodyType ?
double directRotAngle ?
double GeeASL Gravity At Sea Level; in multiple of g (aka “gees”) the gravity at sea level on Kerbin, defined as 9.81 m/s²
double gMagnitudeAtCenter Same as gravParameter (below)
double gravParameter Gravitational parameter (G × Mass), computed as where g = 9.81.
double hillSphere Radius of body's Hill sphere computed as .
double initialRotation ?
bool inverseRotation ?
float inverseRotThresholdAltitude ?
double Mass body's mass (kg), computed as M = µ/G where µ is the body's gravitational parameter (gravParameter) and G=6.674e-11 N⋅m²⋅kg⁻² (instead of G=6.67384e-11 N⋅m²⋅kg⁻²)
double maxAtmosphereAltitude Used when useLegacyAtmosphere is False; atmosphere top altitude (m)
bool ocean ?
OrbitDriver orbitDriver ?
List<CelestialBody> orbitingBodies A list of all the bodies that orbit this one (e.g., the moons of a planet)
PQS pqsController An object that can give you information about the planet's terrain height as a function of position. See the documentation on the PQS class to see how to use it.
AnimationCurve pressureCurve Used when useLegacyAtmosphere is False; AnimationCurve mapping some altitudes (m) to pressure ratios (atm); actual pressure is obtained by multiplying by pressureMultiplier
float pressureMultiplier Used when useLegacyAtmosphere is False; linear factor in pressure (non-zero only on Kerbol, where it is set to 1000000)
double Radius The radius of the planet in meters. This defines sea level.
bool rotates ?
QuaternionD rotation ?
double rotationAngle The current angle of the body's rotation
double rotationPeriod How long it takes the planet to revolve once about its axis, in seconds.
CelestialBodyScienceParams scienceValues ?
double sphereOfInfluence Radius of the body's sphere of influence (m); measured from the center of the planet, not from sea level.
double staticPressureASL  ?; 21.46 on Kerbol, 1 everywhere else
AnimationCurve temperatureCurve ?
PlanetQuadTreeController terrainController ?
bool tidallyLocked Whether the body is tidally locked to its primary (its rotational period is its orbital period)
array of float timeWarpAltitudeLimits ?
bool useLegacyAtmosphere If True, then atmospheric pressure is based on scale height and atmosphere height threshold is a millionth of sea level pressure. Currently set to True for all bodies with an atmosphere.
bool use_The_InName Whether the body's name should be preceded by "the" in a sentence (e.g. "The Sun is pretty hot")
Vector3d zUpAngularVelocity Rotation vector

Methods

The following are methods included in CelestialBody.

Signature Description
double GetAltitude(Vector3d worldPos) The altitude above sea level of a given world position, in meters.
Bounds getBounds() Collision sphere; larger than body, presumably to account for terrain height, atmospheric height and safety margin.
double GetLatitude(Vector3d worldPos) The latitude of a given world position, in degrees.
double GetLongitude(Vector3d worldPos) The longitude of a given world position, in degrees; value may be > 360 or < 0, you should modulo-reduce to an appropriate range (e.g. -180:180 or 0:360).
string GetName() Same as name property.
Vector3 GetObtVelocity() Infinite loop? (version 0.23.5)
Orbit GetOrbit() Same as orbit.
OrbitDriver GetOrbitDriver() Same as orbitDriver.
Vector3d GetRelSurfacePosition(Vector3d worldPosition) Converts a world position into a body-relative position?
Vector3d GetRelSurfacePosition(double lat, double lon, double alt) Returns position in body-relative coordinates for a given longitude/latitude/altitude. Same as GetSurfaceNVector * (body radius + alt).
Vector3d getRFrmVel(Vector3d worldPos) The reference frame of the planet's surface rotates with respect to an inertial reference frame. For example, a ship landed on the planet's surface is actually moving with respect to an inertial frame, because the planet is rotating. This function gives the difference between a velocity in the rotating frame and the same velocity in the inertial frame. You can use it to convert an inertial frame velocity (like the one returned by Orbit.GetVel()) to a rotating frame velocity by (rotating frame velocity) = (inertial frame velocity) - body.GetRFrmVel(position).
Vector3d GetSrfVelocity() Always returns a zero vector. (as of version 0.23.5)
Vector3d GetSurfaceNVector(double lat, double lon) Returns a unit vector that is normal to the sphere of the planet at the given latitude and longitude. (Tells you which way is "up" at a given point on the planet.)
Transform GetTransform() Same as bodyTransform field
Vector3d GetWorldSurfacePosition(double lat, double lon, double alt) Returns the world position corresponding to a given latitude, longitude, and altitude above sea level.
bool HasChild(CelestialBody body) True if the given body orbits this one. Doesn't seem to need to be a direct orbit—can be something that orbits something that orbits this. Inverse of HasParent.
bool HasParent(CelestialBody body) True if the given body orbits is orbited by this one. Doesn't seem to need to be a direct orbit—can be something that's orbited by something that's orbited by this. Inverse of HasChild.
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