parseobject.cpp File Reference

#include <celutil/debug.h>
#include "parseobject.h"
#include "customorbit.h"
#include "trajmanager.h"

Include dependency graph for parseobject.cpp:

Go to the source code of this file.

Functions
static EllipticalOrbit *	CreateEllipticalOrbit (Hash *orbitData, bool usePlanetUnits)
Orbit *	CreateOrbit (PlanetarySystem *system, Hash *planetData, const string &path, bool usePlanetUnits)
void	FillinRotationElements (Hash *rotationData, RotationElements &re)
bool	ParseDate (Hash *hash, const string &name, double &jd)

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Function Documentation

static EllipticalOrbit* CreateEllipticalOrbit (  Hash *  orbitData, bool  usePlanetUnits )  [static]

Definition at line 45 of file parseobject.cpp. References astro::AUtoKilometers(), degToRad(), DPRINTF, and ParseDate(). Referenced by CreateOrbit(). { // SemiMajorAxis and Period are absolutely required; everything // else has a reasonable default. double pericenterDistance = 0.0; double semiMajorAxis = 0.0; if (!orbitData->getNumber("SemiMajorAxis", semiMajorAxis)) { if (!orbitData->getNumber("PericenterDistance", pericenterDistance)) { DPRINTF(0, "SemiMajorAxis/PericenterDistance missing! Skipping planet . . .\n"); return NULL; } } double period = 0.0; if (!orbitData->getNumber("Period", period)) { DPRINTF(0, "Period missing! Skipping planet . . .\n"); return NULL; } double eccentricity = 0.0; orbitData->getNumber("Eccentricity", eccentricity); double inclination = 0.0; orbitData->getNumber("Inclination", inclination); double ascendingNode = 0.0; orbitData->getNumber("AscendingNode", ascendingNode); double argOfPericenter = 0.0; if (!orbitData->getNumber("ArgOfPericenter", argOfPericenter)) { double longOfPericenter = 0.0; if (orbitData->getNumber("LongOfPericenter", longOfPericenter)) argOfPericenter = longOfPericenter - ascendingNode; } double epoch = astro::J2000; ParseDate(orbitData, "Epoch", epoch); // Accept either the mean anomaly or mean longitude--use mean anomaly // if both are specified. double anomalyAtEpoch = 0.0; if (!orbitData->getNumber("MeanAnomaly", anomalyAtEpoch)) { double longAtEpoch = 0.0; if (orbitData->getNumber("MeanLongitude", longAtEpoch)) anomalyAtEpoch = longAtEpoch - (argOfPericenter + ascendingNode); } if (usePlanetUnits) { semiMajorAxis = astro::AUtoKilometers(semiMajorAxis); pericenterDistance = astro::AUtoKilometers(pericenterDistance); period = period * 365.25f; } // If we read the semi-major axis, use it to compute the pericenter // distance. if (semiMajorAxis != 0.0) pericenterDistance = semiMajorAxis * (1.0 - eccentricity); return new EllipticalOrbit(pericenterDistance, eccentricity, degToRad(inclination), degToRad(ascendingNode), degToRad(argOfPericenter), degToRad(anomalyAtEpoch), period, epoch); }

Orbit* CreateOrbit (  PlanetarySystem *  system, Hash *  planetData, const string &  path, bool  usePlanetUnits )

Definition at line 122 of file parseobject.cpp. References CreateEllipticalOrbit(), DPRINTF, ResourceManager< T >::find(), GetCustomOrbit(), ResourceManager< T >::getHandle(), Value::getHash(), GetTrajectoryManager(), Value::getType(), Body::planetocentricToCartesian(), Vector3< T >::x, Vector3< T >::y, and Vector3< T >::z. Referenced by CreatePlanet(), and StarDatabase::createStar(). { Orbit* orbit = NULL; string customOrbitName; if (planetData->getString("CustomOrbit", customOrbitName)) { orbit = GetCustomOrbit(customOrbitName); if (orbit != NULL) { return orbit; } DPRINTF(0, "Could not find custom orbit named '%s'\n", customOrbitName.c_str()); } string sampOrbitFile; if (planetData->getString("SampledOrbit", sampOrbitFile)) { DPRINTF(1, "Attempting to load sampled orbit file '%s'\n", sampOrbitFile.c_str()); ResourceHandle orbitHandle = GetTrajectoryManager()->getHandle(TrajectoryInfo(sampOrbitFile, path)); orbit = GetTrajectoryManager()->find(orbitHandle); if (orbit != NULL) { return orbit; } DPRINTF(0, "Could not load sampled orbit file '%s'\n", sampOrbitFile.c_str()); } Value* orbitDataValue = planetData->getValue("EllipticalOrbit"); if (orbitDataValue != NULL) { if (orbitDataValue->getType() != Value::HashType) { DPRINTF(0, "Object has incorrect elliptical orbit syntax.\n"); return NULL; } else { return CreateEllipticalOrbit(orbitDataValue->getHash(), usePlanetUnits); } } Vec3d longlat(0.0, 0.0, 0.0); if (planetData->getVector("LongLat", longlat) && system != NULL) { Body* parent = system->getPrimaryBody(); if (parent != NULL) { Vec3f pos = parent->planetocentricToCartesian((float) longlat.x, (float) longlat.y, (float) longlat.z); Point3d posd(pos.x, pos.y, pos.z); return new SynchronousOrbit(*parent, posd); } else { // TODO: Allow fixing objects to the surface of stars. } return NULL; } return NULL; }

void FillinRotationElements (  Hash *  rotationData, RotationElements &  re )

Definition at line 194 of file parseobject.cpp. References degToRad(). Referenced by CreatePlanet(), and StarDatabase::createStar(). { float period = 0.0f; if (rotationData->getNumber("RotationPeriod", period)) re.period = period / 24.0f; float offset = 0.0f; if (rotationData->getNumber("RotationOffset", offset)) re.offset = degToRad(offset); rotationData->getNumber("RotationEpoch", re.epoch); float obliquity = 0.0f; if (rotationData->getNumber("Obliquity", obliquity)) re.obliquity = degToRad(obliquity); float ascendingNode = 0.0f; if (rotationData->getNumber("EquatorAscendingNode", ascendingNode)) re.ascendingNode = degToRad(ascendingNode); float precessionRate = 0.0f; if (rotationData->getNumber("PrecessionRate", precessionRate)) re.precessionRate = degToRad(precessionRate); }

bool ParseDate (  Hash *  hash, const string &  name, double &  jd )

Definition at line 23 of file parseobject.cpp. Referenced by CreateEllipticalOrbit(), and CreatePlanet(). { // Check first for a number value representing a Julian date if (hash->getNumber(name, jd)) return true; string dateString; if (hash->getString(name, dateString)) { astro::Date date(1, 1, 1); if (astro::parseDate(dateString, date)) { jd = (double) date; return true; } } return false; }

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