render starmap based on HYG dataset [http://www.astronexus.com/hyg]
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2786129499
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@ -4,6 +4,7 @@ mod world;
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mod settings;
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mod hud;
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mod actor;
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mod starchart;
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use bevy::window::{Window, WindowMode, PrimaryWindow, CursorGrabMode};
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use bevy::diagnostic::FrameTimeDiagnosticsPlugin;
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15550
src/starchart.rs
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15550
src/starchart.rs
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File diff suppressed because it is too large
Load diff
45
src/world.rs
45
src/world.rs
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@ -1,4 +1,4 @@
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use crate::{actor, camera};
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use crate::{actor, camera, starchart};
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use bevy::prelude::*;
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//use bevy::core_pipeline::Skybox;
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//use bevy::asset::LoadState;
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@ -10,10 +10,8 @@ use std::f32::consts::PI;
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const ASTEROID_SIZE: f32 = 100.0;
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const MOON_SIZE: f32 = 50.0;
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const MARS_SIZE: f32 = 10.0;
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const SUN_SIZE: f32 = 5000.0;
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const ASTRONAUT_SIZE: f32 = 5.0;
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const SUN_BRIGHTNESS: f32 = 1e5;
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//const SKYBOX_BRIGHTNESS: f32 = 300.0;
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//const SKYBOX_BRIGHTNESS_AR: f32 = 100.0;
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@ -31,6 +29,9 @@ impl Plugin for WorldPlugin {
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}
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}
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#[derive(Component)]
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pub struct Star;
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//#[derive(Resource)]
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//pub struct WorldState {
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// is_loaded: bool,
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@ -140,11 +141,12 @@ pub fn setup(
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perceptual_roughness: 1.0,
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..default()
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});
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for i in -12..12 {
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for j in -13..13 {
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for k in -14..14 {
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let maxdist = 10;
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for i in -maxdist..maxdist {
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for j in -maxdist..maxdist {
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for k in -maxdist..maxdist {
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let offset = 500.0;
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let dist = 18000.0;
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let dist = 3e4;
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let wobble = dist/2.0;
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let (i, j, k) = (i as f32, j as f32, k as f32);
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commands.spawn((
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@ -164,21 +166,30 @@ pub fn setup(
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}
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}
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// Add THE SUN
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let hydrogenfusion_handle = materials.add(StandardMaterial {
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emissive: Color::rgb_linear(SUN_BRIGHTNESS, 0.9 * SUN_BRIGHTNESS, SUN_BRIGHTNESS),
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// Generate starmap
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for star in starchart::STARS {
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let brightness = star[3] * 2000.0;
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let star_color_handle = materials.add(StandardMaterial {
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base_color: Color::rgb(0.0, 0.0, 0.0),
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emissive: Color::rgb_linear(brightness, 0.9 * brightness, brightness),
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..default()
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});
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commands.spawn(PbrBundle {
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let dist = 1e6;
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commands.spawn((
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Star,
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PbrBundle {
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mesh: sphere_handle.clone(),
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material: hydrogenfusion_handle.clone(),
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material: star_color_handle.clone(),
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transform: Transform::from_xyz(
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0.0,
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30000.0,
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-500000.0,
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).with_scale(Vec3::splat(SUN_SIZE)),
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dist * star[0],
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dist * star[1],
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dist * star[2],
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)
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.with_scale(Vec3::splat((1000.0*star[3]).clamp(500.0, 2000.0))),
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..default()
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});
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}
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));
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}
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// Add alien
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commands.spawn(SceneBundle {
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66
tools/generate_starchart.py
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66
tools/generate_starchart.py
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@ -0,0 +1,66 @@
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#!/usr/bin/env python
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# This script requires the following file in the current directory:
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# https://github.com/astronexus/HYG-Database/blob/cbd21013d2bb89732b893be357a6f41836dbe614/hyg/CURRENT/hygdata_v41.csv
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import csv
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import sys
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import math
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# Lower apparent magnitude = brighter.
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# Sun = -26.7
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# Sirius = -1.44
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# Betelgeuse = 0.45
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# Polaris (north star) = 1.97
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# Meissa (orion's head, 8th brightest star in orion) = 3.33
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MAX_APPARENT_MAGNITUDE = 7.0
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print("// This file was autogenerated by 'genrate_starchart.py' using data from")
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print("// the HYG database: https://github.com/astronexus/HYG-Database/tree/main/hyg")
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print("// License: CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/")
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print("")
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print("pub const STARS: &[[f32; 5]] = &[")
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def render(ra, dec, mag, proper):
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ra = float(ra)
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dec = float(dec)
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mag = float(mag)
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distance = 1.0
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ra_radians = math.radians(ra * 15) # ra is in [0, 24], multiplying by 15 gives degrees in [0, 360]
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dec_radians = math.radians(dec)
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#print(f"ra_radians={ra_radians}, dec_radians={dec_radians}, dec={dec}, ra={ra}", file=sys.stderr)
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x = distance * math.cos(dec_radians) * math.cos(-ra_radians)
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y = distance * math.cos(dec_radians) * math.sin(-ra_radians)
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z = distance * math.sin(dec_radians)
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# Correct for differences in coordinate system axes
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x, y, z = x, z, y
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comment = f" // {proper}" if proper else ""
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brightness = 2.512 ** (0 - mag)
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print(f" [{x:.04}, {y:.04}, {z:.04}, {brightness:.04}, {ci}],{comment}")
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total = 0
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count = 0
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with open("hygdata_v41.csv", "r", encoding="utf-8") as f:
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for entry in csv.DictReader(f):
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total += 1
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ra = entry['ra']
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dec = entry['dec']
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mag = entry['mag']
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ci = entry['ci']
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proper = entry['proper']
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proper = "".join([c for c in proper if c.isalnum() or c in ' -_'])
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if not all([ra, dec, mag, ci]):
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continue
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if float(mag) > MAX_APPARENT_MAGNITUDE:
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continue
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render(ra, dec, mag, proper)
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count += 1
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print("];")
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print(f"Wrote {count} stars (total={total}).", file=sys.stderr)
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