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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
..
bevymark.rs Schedule-First: the new and improved add_systems (#8079) 2023-03-18 01:45:34 +00:00
many_animated_sprites.rs Schedule-First: the new and improved add_systems (#8079) 2023-03-18 01:45:34 +00:00
many_buttons.rs Allow many_buttons to be run without text (#8116) 2023-03-18 22:58:17 +00:00
many_cubes.rs Schedule-First: the new and improved add_systems (#8079) 2023-03-18 01:45:34 +00:00
many_foxes.rs Schedule-First: the new and improved add_systems (#8079) 2023-03-18 01:45:34 +00:00
many_gizmos.rs Immediate Mode Line/Gizmo Drawing (#6529) 2023-03-20 20:57:54 +00:00
many_glyphs.rs Schedule-First: the new and improved add_systems (#8079) 2023-03-18 01:45:34 +00:00
many_lights.rs Schedule-First: the new and improved add_systems (#8079) 2023-03-18 01:45:34 +00:00
many_sprites.rs Schedule-First: the new and improved add_systems (#8079) 2023-03-18 01:45:34 +00:00
README.md Add a stress test profile (#6901) 2022-12-20 15:59:41 +00:00
text_pipeline.rs Schedule-First: the new and improved add_systems (#8079) 2023-03-18 01:45:34 +00:00
transform_hierarchy.rs Schedule-First: the new and improved add_systems (#8079) 2023-03-18 01:45:34 +00:00
warning_string.txt Added performance warning when running stress test examples in debug mode (#5029) 2022-07-13 19:13:46 +00:00

README.md

Stress tests

These examples are used to stress test Bevy's performance in various ways. These should be run with the "stress-test" profile to accurately represent performance in production, otherwise they will run in cargo's default "dev" profile which is very slow.

Example Command

cargo run --profile stress-test --example <EXAMPLE>