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0.1.3 relativity

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rob tillaart 2022-08-04 12:11:24 +02:00
parent 4d66441771
commit 59f8dd3646
4 changed files with 30 additions and 25 deletions
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4
libraries/relativity/README.md
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@ -67,7 +67,11 @@ See examples for typical usage.
## Future
- test test test test
- Split .h into .h and .cpp
- add more functions
- Schwarzschild horizon etc
-
- fix some overflow conditions.
- add moons?
- need a database :)
- add caching version of mass / radius;

2
libraries/relativity/library.json
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@ -15,7 +15,7 @@
"type": "git",
"url": "https://github.com/RobTillaart/relativity.git"
},
"version": "0.1.2",
"version": "0.1.3",
"license": "MIT",
"frameworks": "*",
"platforms": "*",

2
libraries/relativity/library.properties
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@ -1,5 +1,5 @@
name=relativity
version=0.1.2
version=0.1.3
author=Rob Tillaart <rob.tillaart@gmail.com>
maintainer=Rob Tillaart <rob.tillaart@gmail.com>
sentence=library with relativity functions.

47
libraries/relativity/relativity.h
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@ -2,7 +2,7 @@
//
// FILE: relativity.h
// AUTHOR: Rob Tillaart
// VERSION: 0.1.2
// VERSION: 0.1.3
// PURPOSE: Collection relativity formulas
// URL: https://github.com/RobTillaart/relativity
//
@ -10,12 +10,13 @@
// 0.1.0 2021-05-29 initial version
// 0.1.1 2021-06-02 fix in tests
// 0.1.2 2021-12-27 update library.json, readme, license, minor edits
// 0.1.3 2022-08-04 fix constructor
#include "Arduino.h"
#define RELATIVITY_LIB_VERSION (F("0.1.2"))
#define RELATIVITY_LIB_VERSION (F("0.1.3"))
class relativity
@ -24,9 +25,9 @@ public:
relativity()
{
double _speed = 0.0;
double _factor = 1.0;
double _gamma = 1.0;
_speed = 0.0;
_factor = 1.0;
_gamma = 1.0;
}
double getC()
@ -53,7 +54,7 @@ public:
///////////////////////////////////////////////////////////////////
//
// relativistic corrections for speed
// relativistic corrections for speed
//
double relativeTime(double time, double speed)
@ -77,12 +78,12 @@ public:
}
// set speed only once for the 3 values
// set speed only once for the 3 values
void setSpeed(double speed = 0)
{
_speed = speed;
_speed = speed;
_factor = factor(speed);
_gamma = gamma(speed);
_gamma = gamma(speed);
}
double getSpeed()
@ -113,35 +114,35 @@ public:
///////////////////////////////////////////////////////////////////
//
// relativistic corrections for gravity
// relativistic corrections for gravity
//
double gravitationalTime(double time, double mass, double radius)
{
// formula tries to stay within float range
// formula tries to stay within float range
return time / sqrt(1 - (mass / (radius * _c2)) * (2 * _G) );
}
// returns radius in km.
// returns radius in km.
double radiusEarth(double longitude = 45) // 0..90
{
// https://www.youtube.com/watch?v=hYMvJum9_Do @ 8:00
// radius polar: 6357 km
// radius equator: 6378 km
// difference: 21 km
// https://www.youtube.com/watch?v=hYMvJum9_Do @ 8:00
// radius polar: 6357 km
// radius equator: 6378 km
// difference: 21 km
double radians = longitude * (PI / 180.0);
// approx of the graph in YouTube with a cosine
// approx of the graph in YouTube with a cosine
return 6367.5 + 10.5 * cos(radians * 2);
}
// mass in
// mass in
double getPlanetMass(uint8_t n) // sun = 0; mercury = 1 etc
{
return massPlanets[n];
}
// radius in km
// radius in km
double getPlanetRadius(uint8_t n) // sun = 0; mercury = 1 etc
{
return radiusPlanets[n];
@ -156,8 +157,8 @@ private:
const double _G = 6.6742e-11; // gravitational constant
// wikipedia
// kg
// wikipedia
// kg
const double massPlanets[10] =
{
1.9891e30, // Sun
@ -172,7 +173,7 @@ private:
13.03e21, // Pluto
};
// km
// km
const double radiusPlanets[10] =
{
695508, // Sun
@ -187,7 +188,7 @@ private:
1188.3, // Pluto
};
// cache
// cache
double _speed = 0.0;
double _factor = 1.0;
double _gamma = 1.0;