restore jupiter's ring

src/commands.rs

@@ -3,7 +3,7 @@ extern crate regex;
 use bevy::prelude::*;
 use bevy_xpbd_3d::prelude::*;
 use bevy::math::DVec3;
-use crate::{actor, chat, hud, nature, world};
+use crate::{actor, chat, hud, nature, shading, world};
 use regex::Regex;
 use std::f32::consts::PI;
 use std::f64::consts::PI as PI64;
@@ -55,6 +55,7 @@ struct ParserState {
     is_targeted_on_startup: bool,
     is_sun: bool,
     has_physics: bool,
+    has_ring: bool,
     wants_maxrotation: Option<f64>,
     wants_maxvelocity: Option<f64>,
     collider_is_mesh: bool,
@@ -101,6 +102,7 @@ impl Default for ParserState {
             is_targeted_on_startup: false,
             is_sun: false,
             has_physics: true,
+            has_ring: false,
             wants_maxrotation: None,
             wants_maxvelocity: None,
             collider_is_mesh: false,
@@ -257,6 +259,9 @@ pub fn load_defs(
                 state.is_sun = true;
                 state.model_scale *= 5.0;
             }
+            ["ring", "yes"] => {
+                state.has_ring = true;
+            }
             ["oxygen", amount] => {
                 if let Ok(amount) = amount.parse::<f32>() {
                     state.is_lifeform = true;
@@ -462,6 +467,7 @@ fn spawn_entities(
     asset_server: Res<AssetServer>,
     mut meshes: ResMut<Assets<Mesh>>,
     mut materials: ResMut<Assets<StandardMaterial>>,
+    mut materials_jupiter: ResMut<Assets<shading::JupitersRing>>,
 ) {
     for state_wrapper in er_spawn.read() {
         let state = &state_wrapper.0;
@@ -644,6 +650,25 @@ fn spawn_entities(
                     },
                 ));
             }
+
+            if state.has_ring {
+                commands.spawn((
+                    world::DespawnOnPlayerDeath,
+                    MaterialMeshBundle {
+                        mesh: meshes.add(Mesh::from(Cylinder::new(nature::JUPITER_RING_RADIUS as f32, 1.0))),
+                        material: materials_jupiter.add(shading::JupitersRing {
+                            alpha_mode: AlphaMode::Blend,
+                            ring_radius: nature::JUPITER_RING_RADIUS as f32,
+                            jupiter_radius: nature::JUPITER_RADIUS as f32,
+                        }),
+                        transform: Transform::from_translation(state.pos.as_vec3()),
+                        ..default()
+                    },
+                    Position::new(state.pos),
+                    Rotation::from(Quat::IDENTITY),
+                    //Rotation::from(Quat::from_rotation_x(-0.3f32.to_radians())),
+                ));
+            }
         }
     }
 }

src/defs.txt

@@ -13,6 +13,7 @@ actor 0 0 0 jupiter
     name Jupiter
     scale 71492e3
     sphere yes
+    ring yes
     physics off
     rotationx -0.50
     rotationz -0.28

src/nature.rs

@@ -11,7 +11,10 @@ pub const LIGHTYEAR2METER: f64 = 9_460_730_472_580_800.0;
 pub const PARSEC2METER: f64 = 3.0857e16;
 pub const DIST_JUPTER_SUN: f64 = 778479.0e6;
 pub const EARTH_GRAVITY: f32 = 9.81;
-pub const SOL_RADIUS: f64 = 696.3e6;
+
+pub const SOL_RADIUS: f64 =          696_300_000.0;
+pub const JUPITER_RADIUS: f64 =       71_492_000.0;
+pub const JUPITER_RING_RADIUS: f64 = 229_000_000.0;
 
 // Each star's values: (x, y, z, magnitude, color index, distance, name)
 pub const STARS: &[(f32, f32, f32, f32, f32, f32, &str)] = &include!("data/stars.in");

src/world.rs

@@ -104,7 +104,6 @@ pub fn setup(
     mut commands: Commands,
     mut meshes: ResMut<Assets<Mesh>>,
     mut materials: ResMut<Assets<StandardMaterial>>,
-    mut materials_jupiter: ResMut<Assets<shading::JupitersRing>>,
     mut materials_skybox: ResMut<Assets<shading::SkyBox>>,
     asset_server: Res<AssetServer>,
 ) {
@@ -196,24 +195,6 @@ pub fn setup(
             ..default()
         });
     }
-
-    // Add shaded ring
-    let ring_radius = 229_000_000.0;
-    let jupiter_radius = 71_492_000.0;
-    commands.spawn((
-        MaterialMeshBundle {
-            mesh: meshes.add(Mesh::from(Cylinder::new(ring_radius, 1.0))),
-            material: materials_jupiter.add(shading::JupitersRing {
-                alpha_mode: AlphaMode::Blend,
-                ring_radius: ring_radius,
-                jupiter_radius: jupiter_radius,
-            }),
-            ..default()
-        },
-        Position::from_xyz(0.0, 0.0, 0.0),
-        Rotation::from(Quat::IDENTITY),
-        //Rotation::from(Quat::from_rotation_x(-0.3f32.to_radians())),
-    ));
 }
 
 fn spawn_despawn_asteroids(