From 349634b0ae86f6bbda02bf1a56c788dc677c75b4 Mon Sep 17 00:00:00 2001
From: core <core@coredoes.dev>
Date: Sun, 16 Apr 2023 17:42:33 -0400
Subject: [PATCH] realistically scale planet masses

---
 server/src/orbit/constants.rs | 14 ++++++++++----
 server/src/planet.rs          |  6 +++---
 2 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/server/src/orbit/constants.rs b/server/src/orbit/constants.rs
index 40f321fa1a09926bd8f17d82c99013e271dbc1d8..825086c1101034b68c794e301aa4a24c73227598 100644
--- a/server/src/orbit/constants.rs
+++ b/server/src/orbit/constants.rs
@@ -1,10 +1,16 @@
-pub const GAME_SCALE: f64 = 0.0001567865; // 1000 / EARTH_RADIUS_RL
+pub const GAME_SCALE_DISTANCE: f64 = 0.0001567865; // 1000 / EARTH_RADIUS_RL
+pub const GAME_SCALE_MASS: f64 = 0.0000000000000000000006697923643670463; // 4000 / EARTH_MASS_RL
 
 pub const EARTH_RADIUS_RL: f64 = 6_378_100.0;
-pub const EARTH_RADIUS: f64 = EARTH_RADIUS_RL * GAME_SCALE;
+pub const EARTH_RADIUS: f64 = EARTH_RADIUS_RL * GAME_SCALE_DISTANCE;
+pub const EARTH_MASS_RL: f64 = 5972000000000000000000000.0;
+pub const EARTH_MASS: f64 = EARTH_MASS_RL * GAME_SCALE_MASS;
 
 pub const MOON_RADIUS_RL: f64 = 1_737_400.0;
-pub const MOON_RADIUS: f64 = MOON_RADIUS_RL * GAME_SCALE;
+pub const MOON_RADIUS: f64 = MOON_RADIUS_RL * GAME_SCALE_DISTANCE;
+pub const MOON_MASS_RL: f64 = 73476730900000000000000.0;
+pub const MOON_MASS: f64 = MOON_MASS_RL * GAME_SCALE_MASS;
+
 pub const MOON_PERIAPSIS: f64 = 5400.0; //363228.9 * 1000.0 * GAME_SCALE; // real values
 pub const MOON_APOAPSIS: f64 = 5600.0; //405400.0 * 1000.0  * GAME_SCALE; // real values
-pub const MOON_ORBIT_TIME: f64 = 23328000.0 * GAME_SCALE; // not real values (10x higher)
\ No newline at end of file
+pub const MOON_ORBIT_TIME: f64 = 23328000.0 * GAME_SCALE_DISTANCE; // not real values (10x higher)
\ No newline at end of file
diff --git a/server/src/planet.rs b/server/src/planet.rs
index a304b20f74fa3b1bc16c9537f440fb323215e5bd..51371ff658118f41846e8a79452026be0b052d84 100644
--- a/server/src/planet.rs
+++ b/server/src/planet.rs
@@ -4,7 +4,7 @@ use rapier2d_f64::prelude::{RigidBodyHandle, RigidBodySet, ColliderBuilder, Rigi
 use starkingdoms_protocol::planet::PlanetType;
 
 use crate::{SCALE, manager::ClientHandlerMessage};
-use crate::orbit::constants::{EARTH_RADIUS, MOON_APOAPSIS, MOON_PERIAPSIS, MOON_RADIUS};
+use crate::orbit::constants::{EARTH_MASS, EARTH_RADIUS, MOON_APOAPSIS, MOON_MASS, MOON_PERIAPSIS, MOON_RADIUS};
 use crate::orbit::orbit::{calculate_point_on_orbit, calculate_world_position_of_orbit};
 
 //const GRAVITY: f64 = 0.001;
@@ -69,7 +69,7 @@ impl Planets {
             &mut planets,
             "earth",
             PlanetType::Earth,
-            4000.0,
+            EARTH_MASS,
             EARTH_RADIUS,
             (100.0, 100.0),
             rigid_body_set,
@@ -82,7 +82,7 @@ impl Planets {
             &mut planets,
             "moon",
             PlanetType::Moon,
-            1000.0,
+            MOON_MASS,
             MOON_RADIUS,
             (moon_start_point[0], moon_start_point[1]),
             rigid_body_set,