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Add Wireframe2d plugin #10489

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Add Wireframe2d plugin #10489

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SludgePhD
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@SludgePhD SludgePhD commented Nov 10, 2023 •
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Objective

Solution

  • This PR implements a solution by duplicating the 3D wireframe module, creating a 2d variant of it.
  • It may be better to move both of them into a common crate that depends on both bevy_pbr and bevy_sprite, and let them share code and types. Opinions welcome!

Changelog

Added

  • Added Wireframe2d plugin for drawing 2D meshes as wireframes.

@SludgePhD
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SludgePhD commented Nov 10, 2023 •
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This currently has a bug where the wireframe appears behind the object. I had to remove the line that fixes this in the 3D wireframe because the depth_stencil state is None here:

descriptor.depth_stencil.as_mut().unwrap().bias.slope_scale = 1.0;

Fixed this problem by applying a depth bias with a new Material2d::depth_bias function (mirroring the existing one in the 3D Material trait).

@alice-i-cecile alice-i-cecile added C-Feature A new feature, making something new possible A-Gizmos Visual editor and debug gizmos labels Nov 12, 2023
@SludgePhD SludgePhD mentioned this pull request Nov 21, 2023
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github-merge-queue bot pushed a commit that referenced this pull request Nov 25, 2023
@SludgePhD
Add a depth_bias to Material2d (#10683)
3c8c257 
# Objective

It is currently impossible to control the relative ordering of two 2D
materials at the same depth. This is required to implement wireframes
for 2D meshes correctly
(#5881).

## Solution

Add a `Material2d::depth_bias` function that mirrors the existing 3D
`Material::depth_bias` function.

(this is pulled out of #10489)

---

## Changelog

### Added

- Added `Material2d::depth_bias`

## Migration Guide

`PreparedMaterial2d` has a new `depth_bias` field. A value of 0.0 can be
used to get the previous behavior.
tectin0 added a commit to tectin0/magic_guns that referenced this pull request Dec 17, 2023
@tectin0
added tile selection to map_editor +
7ec6afa 
added basic mesh display +
copied `colored_mesh2d` shader from example +
tried wireframe plugin but not working with 2D:
bevyengine/bevy#10489
@TotalKrill
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This looks quite sound, and quite useful, for example if one is trying to draw roads in 2D, and wanna figure out why their meshes are not meshing

I rebased it and you can find the rebase here: https://github.com/TotalKrill/bevy/tree/wireframe2d

@SludgePhD
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There's also #12135 now, which has more maintainer attention, so that'll probably be merged instead

@TotalKrill
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Look at that wish I had known, could have saved me some minutes, maybe close this one then, to help declutter

@SludgePhD SludgePhD closed this Mar 27, 2024
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A-Gizmos Visual editor and debug gizmos C-Feature A new feature, making something new possible
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Wireframe for 2D meshes
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@SludgePhD @TotalKrill @alice-i-cecile