bevy/docs/cargo_features.md
ira 6a85eb3d7e
Immediate Mode Line/Gizmo Drawing (#6529)
# Objective
Add a convenient immediate mode drawing API for visual debugging.

Fixes #5619
Alternative to #1625
Partial alternative to #5734

Based off https://github.com/Toqozz/bevy_debug_lines with some changes:
 * Simultaneous support for 2D and 3D.
 * Methods for basic shapes; circles, spheres, rectangles, boxes, etc.
 * 2D methods.
 * Removed durations. Seemed niche, and can be handled by users.

<details>
<summary>Performance</summary>

Stress tested using Bevy's recommended optimization settings for the dev
profile with the
following command.
```bash
cargo run --example many_debug_lines \
    --config "profile.dev.package.\"*\".opt-level=3" \
    --config "profile.dev.opt-level=1"
```
I dipped to 65-70 FPS at 300,000 lines
CPU: 3700x
RAM Speed: 3200 Mhz
GPU: 2070 super - probably not very relevant, mostly cpu/memory bound

</details>

<details>
<summary>Fancy bloom screenshot</summary>


![Screenshot_20230207_155033](https://user-images.githubusercontent.com/29694403/217291980-f1e0500e-7a14-4131-8c96-eaaaf52596ae.png)

</details>

## Changelog
 * Added `GizmoPlugin`
 * Added `Gizmos` system parameter for drawing lines and wireshapes.

### TODO
- [ ] Update changelog
- [x] Update performance numbers
- [x] Add credit to PR description

### Future work
- Cache rendering primitives instead of constructing them out of line
segments each frame.
- Support for drawing solid meshes
- Interactions. (See
[bevy_mod_gizmos](https://github.com/LiamGallagher737/bevy_mod_gizmos))
- Fancier line drawing. (See
[bevy_polyline](https://github.com/ForesightMiningSoftwareCorporation/bevy_polyline))
- Support for `RenderLayers`
- Display gizmos for a certain duration. Currently everything displays
for one frame (ie. immediate mode)
- Changing settings per drawn item like drawing on top or drawing to
different `RenderLayers`

Co-Authored By: @lassade <felipe.jorge.pereira@gmail.com>
Co-Authored By: @The5-1 <agaku@hotmail.de> 
Co-Authored By: @Toqozz <toqoz@hotmail.com>
Co-Authored By: @nicopap <nico@nicopap.ch>

---------

Co-authored-by: Robert Swain <robert.swain@gmail.com>
Co-authored-by: IceSentry <c.giguere42@gmail.com>
Co-authored-by: Carter Anderson <mcanders1@gmail.com>
2023-03-20 20:57:54 +00:00

73 lines
3.5 KiB
Markdown

<!-- MD041 - This file will be included in docs and should not start with a top header -->
<!-- markdownlint-disable-file MD041 -->
## Cargo Features
Bevy exposes many features to customise the engine. Enabling them add functionalities but often come at the cost of longer compilation times and extra dependencies.
### Default Features
The default feature set enables most of the expected features of a game engine, like rendering in both 2D and 3D, asset loading, audio and UI. To help reduce compilation time, consider disabling default features and enabling only those you need.
|feature name|description|
|-|-|
|android_shared_stdcxx|Enable using a shared stdlib for cxx on Android|
|animation|Enable animation support, and glTF animation loading|
|bevy_animation|Provides animation functionality|
|bevy_asset|Provides asset functionality|
|bevy_audio|Provides audio functionality|
|bevy_core_pipeline|Provides cameras and other basic render pipeline features|
|bevy_gilrs|Adds gamepad support|
|bevy_gizmos|Adds support for rendering gizmos|
|bevy_gltf|[glTF](https://www.khronos.org/gltf/) support|
|bevy_pbr|Adds PBR rendering|
|bevy_render|Provides rendering functionality|
|bevy_scene|Provides scene functionality|
|bevy_sprite|Provides sprite functionality|
|bevy_text|Provides text functionality|
|bevy_ui|A custom ECS-driven UI framework|
|bevy_winit|winit window and input backend|
|filesystem_watcher|Enable watching file system for asset hot reload|
|hdr|HDR image format support|
|ktx2|KTX2 compressed texture support|
|png|PNG image format support|
|tonemapping_luts|Include tonemapping Look Up Tables KTX2 files|
|vorbis|OGG/VORBIS audio format support|
|x11|X11 display server support|
|zstd|For KTX2 supercompression|
### Optional Features
|feature name|description|
|-|-|
|accesskit_unix|Enable AccessKit on Unix backends (currently only works with experimental screen readers and forks.)|
|basis-universal|Basis Universal compressed texture support|
|bevy_ci_testing|Enable systems that allow for automated testing on CI|
|bevy_dynamic_plugin|Plugin for dynamic loading (using [libloading](https://crates.io/crates/libloading))|
|bmp|BMP image format support|
|dds|DDS compressed texture support|
|debug_asset_server|Enable the "debug asset server" for hot reloading internal assets|
|detailed_trace|Enable detailed trace event logging. These trace events are expensive even when off, thus they require compile time opt-in|
|dynamic_linking|Force dynamic linking, which improves iterative compile times|
|exr|EXR image format support|
|flac|FLAC audio format support|
|jpeg|JPEG image format support|
|minimp3|MP3 audio format support (through minimp3)|
|mp3|MP3 audio format support|
|serialize|Enable serialization support through serde|
|subpixel_glyph_atlas|Enable rendering of font glyphs using subpixel accuracy|
|symphonia-aac|AAC audio format support (through symphonia)|
|symphonia-all|AAC, FLAC, MP3, MP4, OGG/VORBIS, and WAV audio formats support (through symphonia)|
|symphonia-flac|FLAC audio format support (through symphonia)|
|symphonia-isomp4|MP4 audio format support (through symphonia)|
|symphonia-vorbis|OGG/VORBIS audio format support (through symphonia)|
|symphonia-wav|WAV audio format support (through symphonia)|
|tga|TGA image format support|
|trace|Tracing support|
|trace_chrome|Tracing support, saving a file in Chrome Tracing format|
|trace_tracy|Tracing support, exposing a port for Tracy|
|wav|WAV audio format support|
|wayland|Wayland display server support|
|wgpu_trace|Save a trace of all wgpu calls|
|zlib|For KTX2 supercompression|