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ira 001b3eb97c
Instanced line rendering for gizmos based on bevy_polyline (#8427) 
# Objective

Adopt code from
[bevy_polyline](https://github.com/ForesightMiningSoftwareCorporation/bevy_polyline)
for gizmo line-rendering.
This adds configurable width and perspective rendering for the lines.

Many thanks to @mtsr for the initial work on bevy_polyline. Thanks to
@aevyrie for maintaining it, @nicopap for adding the depth_bias feature
and the other
[contributors](https://github.com/ForesightMiningSoftwareCorporation/bevy_polyline/graphs/contributors)
for squashing bugs and keeping bevy_polyline up-to-date.

#### Before

![Before](https://user-images.githubusercontent.com/29694403/232831591-a8e6ed0c-3a09-4413-80fa-74cb8e0d33dd.png)
#### After - with line perspective

![After](https://user-images.githubusercontent.com/29694403/232831692-ba7cbeb7-e63a-4f8e-9b1b-1b80c668f149.png)

Line perspective is not on by default because with perspective there is
no default line width that works for every scene.

<details><summary>After - without line perspective</summary>
<p>

![After - no
perspective](https://user-images.githubusercontent.com/29694403/232836344-0dbfb4c8-09b7-4cf5-95f9-a4c26f38dca3.png)

</p>
</details>

Somewhat unexpectedly, the performance is improved with this PR.
At 200,000 lines in many_gizmos I get ~110 FPS on main and ~200 FPS with
this PR.
I'm guessing this is a CPU side difference as I would expect the
rendering technique to be more expensive on the GPU to some extent, but
I am not entirely sure.

---------

Co-authored-by: Jonas Matser <github@jonasmatser.nl>
Co-authored-by: Aevyrie <aevyrie@gmail.com>
Co-authored-by: Nicola Papale <nico@nicopap.ch>
Co-authored-by: Nicola Papale <nicopap@users.noreply.github.com>
2023-06-13 06:49:47 +00:00
..
bevymark.rs Allow systems using Diagnostics to run in parallel (#8677) 2023-06-05 20:51:22 +00:00
many_animated_sprites.rs fix new clippy lints before they reach stable (#8700) 2023-05-29 07:23:50 +00:00
many_buttons.rs fix new clippy lints before they reach stable (#8700) 2023-05-29 07:23:50 +00:00
many_cubes.rs fix new clippy lints before they reach stable (#8700) 2023-05-29 07:23:50 +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 Instanced line rendering for gizmos based on bevy_polyline (#8427) 2023-06-13 06:49:47 +00:00
many_glyphs.rs fix new clippy lints before they reach stable (#8700) 2023-05-29 07:23:50 +00:00
many_lights.rs fix new clippy lints before they reach stable (#8700) 2023-05-29 07:23:50 +00:00
many_sprites.rs fix new clippy lints before they reach stable (#8700) 2023-05-29 07:23:50 +00:00
README.md Add a stress test profile (#6901) 2022-12-20 15:59:41 +00:00
text_pipeline.rs fix new clippy lints before they reach stable (#8700) 2023-05-29 07:23:50 +00:00
transform_hierarchy.rs fix new clippy lints before they reach stable (#8700) 2023-05-29 07:23:50 +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>