bunch a stuff (#6)

* engine: slim down feature set to improve compile times

* repo: update license

* dev: camera controls

Cargo.toml

@@ -15,26 +15,59 @@ path = "src/main.rs"
 default = [
     # Default to a native dev build.
     "dev_native",
+    "render",
 ]
 dev = [
     # Improve compile times for dev builds by linking Bevy as a dynamic
     # library.
     "bevy/dynamic_linking",
     "bevy/bevy_dev_tools",
-    "bevy/sysinfo_plugin",
 ]
 dev_native = [
     "dev",
     # Enable system information plugin for native dev builds.
     "bevy/sysinfo_plugin",
 ]
+headless = [
+    # Exclude rendering features
+    # This feature does not include the "render" feature
+    # Thus, rendering-related dependencies are disabled
+]
+render = [
+    # Enable features needed for visuals, windowed operation, and UIs.
+    "bevy/bevy_asset",
+    "bevy/bevy_color",
+    "bevy/bevy_core_pipeline",
+    "bevy/bevy_gizmos",
+    "bevy/ktx2",
+    "bevy/bevy_mesh_picking_backend",
+    "bevy/bevy_pbr",
+    "bevy/bevy_render",
+    "bevy/bevy_picking",
+    "bevy/bevy_text",
+    "bevy/bevy_ui",
+    "bevy/bevy_ui_picking_backend",
+    "bevy/bevy_window",
+    "bevy/bevy_winit",
+    "bevy/default_font",
+    "bevy/tonemapping_luts",
+    "bevy/png",
+    "bevy/webgl2",
+]
+inspect = [
+    "default",
+    "bevy-inspector-egui",
+]
 
 [dependencies]
-bevy = "0.15.0"
+bevy = { version =  "0.15.0", default-features = false, features = [
+    "bevy_asset",
+    "bevy_state",
+    "multi_threaded",
+] }
 avian3d = { git = "https://github.com/Jondolf/avian.git", branch = "main", features = ["debug-plugin"] }
 bevy-trait-query = { git = "https://github.com/JoJoJet/bevy-trait-query.git", branch = "bevy-0.15-rc" }
-iyes_perf_ui = { git = "https://github.com/JohnathanFL/iyes_perf_ui.git", branch = "main" }
-
+bevy-inspector-egui = { version = "0.28", optional = true, features = ["highlight_changes"] }
 # -----------------------------------------------------------------------------
 # Some Bevy optimizations
 # -----------------------------------------------------------------------------

LICENSE-MIT

@@ -0,0 +1,19 @@
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,7 +1,22 @@
 # yet another HAB simulator
 
-A high altitude balloon flight simulator based on
-[tkschuler/EarthSHAB](https://github.com/tkschuler/EarthSHAB) and
-[brickworks/mfc-apps](https://github.com/Brickworks/mfc-apps), built on Rust.
+A high altitude balloon flight simulator built in
+[Bevy](https://bevyengine.org/) with Rust, inspired by
+[tkschuler/EarthSHAB](https://github.com/tkschuler/EarthSHAB).
 
 [devlog](docs/devlog.md)
+
+## License
+
+Except where noted (below and/or in individual files), all code in this
+repository is dual-licensed under either:
+
+* MIT License ([LICENSE-MIT](LICENSE-MIT) or
+  [http://opensource.org/licenses/MIT](http://opensource.org/licenses/MIT))
+* Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
+  [http://www.apache.org/licenses/LICENSE-2.0](http://www.apache.org/licenses/LICENSE-2.0))
+
+at your option. This means you can select the license you prefer! This
+dual-licensing approach is the de-facto standard in the Rust ecosystem and there
+are [very good reasons](https://github.com/bevyengine/bevy/issues/2373) to
+include both.

docs/devlog.md

@@ -8,6 +8,38 @@ Bevy 0.15 support. Looks like they haven't but there are branches for it.
 - [x] `avian3d` -> branch `main`
 - [x] `bevy-trait-query` -> branch `bevy-0.15-rc`
 - [x] `iyes_perf_ui` -> branch `main`
+- [x] `bevy_egui` -> version `0.31`
+- [x] `bevy_inspector_egui` -> version `0.28`
+
+I'm hoping to slim down the dependencies for the project to shorten compile
+times. I'm a little annoyed with the `iyes_perf_ui` crate. It is a great tool
+but there is a ton of boilerplate code to set up the Ui. I think the built-in
+text crate will be enough for what I'm doing and will simplify things.
+
+Now, there are still a few things I am interested in doing soon:
+
+- [ ] Add a payload hanging from a tether.
+- [ ] Add a skybox or some reference in the background to illustrate the
+      balloon's size and altitude.
+- [ ] Style the UI like a retro radar display.
+- [ ] Sort out the time scale multiplier (the physics becomes unstable when it
+  goes above 1.5).
+- [ ] Add plots for altitude, pressure, temperature, volume, and density.
+
+I did a little work to group the rendering plugins into a separate plugin group
+from the headless plugins. I don't know why I decided to do that, but it will
+come in handy when I want to compile for wasm or terminal operation.
+
+Things I added:
+
+- [x] Rendering plugins in separate plugin group. `headless` runs without gfx.
+- [x] Lighting based on Bevy's example.
+- [x] Camera controller based on Bevy's `camera_controller` example.
+- [x] Observer/trigger-based debug UI toggles. Only some of them are working.
+- [x] Added targeting controls to the camera.
+
+I spent a few hours trying to get the skybox working but I couldn't get it to
+load.
 
 ## 2024-11-29