UI shapes

[Nilirad]

NOTICE (2023-06-20)

Unfortunately, Bevy's development took a direction that made it difficult to maintain UI shapes. Therefore, this feature was removed briefly after implementation. If you are interested in bringing this feature back, you're welcome to submit a PR.

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Changes and usage notes

• Added ui example
• Added build_ui and build_ui_as as GeometryBuilder associated functions
• Changed render pipeline UUID handles to hexadecimal format
• Shapes will update on changed Path

Notes:

• Size won't have effect as I removed from the shader the NodeSize uniform. It would expect elements that would fit properly in a 1x1 pixel/units square to work properly, but bevy_prototype_lyon can't guarantee this condition at the moment.

Comments

• It's recommended to check out the ui example to learn how to use build_ui and build_ui_as (spoiler: it's similar to the "normal" counterparts). Sorry if it's not minimal but I wanted to create something presentable...

cc: @inodentry, @alice-i-cecile, @rparrett