blaind / bevy_text_mesh Goto Github PK

Currently crate uses its own asset loader for a font.

This may be desired eventually too, but it may overlap with bevy standard loader. It could not be used, since there is no way to expose the font-bytes (needed for ttf2mesh).

Is there any chance WASM will be supported? Thanks.

The library possibly fails to compile on MacOS:

warning: ttf2mesh/ttf2mesh.c:54:10: fatal error: 'malloc.h' file not found
warning: #include <malloc.h>
warning:          ^~~~~~~~~~
warning: 1 error generated.

There's a related stackoverflow question about malloc.h at https://stackoverflow.com/a/56463133/499839

One option would be to transpile ttfmesh.c into rust by https://c2rust.com/. That could also fix #11

thread 'Compute Task Pool (15)' panicked at C:\Users\Johan\.cargo\registry\src\index.crates.io-6f17d22bba15001f\bevy_text_mesh-0.9.0\src\mesh_data_generator.rs:95:26:
called `Result::unwrap()` on an `Err` value: Glyph2MeshError
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Encountered a panic in system `bevy_text_mesh::mesh_system::text_mesh`!
Encountered a panic in system `bevy_app::main_schedule::Main::run_main`!

I used the bold version of https://fonts.google.com/specimen/Playpen+Sans/about?preview.text=score%201234

    let font = asset_server.load("fonts/playpen_sans_extrabold.ttf#mesh");
    commands.spawn((
        Name::new("ScoreText"),
        TextMeshBundle {
            text_mesh: TextMesh {
                // text: "0".into(), // does not panic
                text: "1".into(), // panics
                style: TextMeshStyle {
                    font: font.clone(),
                    font_size: SizeUnit::NonStandard(36.),
                    color: Color::rgb(0.0, 1.0, 0.0),
                    mesh_quality: Quality::Low,
                    ..default()
                },
                ..default()
            },
            ..default()
        },
    ));

Some fonts produce a Glyph2MeshError when you attempt to load them. For example, Inter.

Other fonts, like Courier, don't seem to render at all, even though they load properly.

When I add in the TextMeshPlugin then any 2d text ( https://github.com/bevyengine/bevy/blob/main/examples/ui/text.rs ) disappears. I am guessing that it's just that the 2d text is getting upset by a different font loader.

It would be great if I could use your awesome 3d text and also have some 2d ui (like fps and other HUD info). Took me a little while to track this down that this was the cause.

Currently, the size unit is just an arbitrary number (SizeUnit::NonStandard) - some standardized way should be defined.

My bad... I forgot to load the regular bevy Font while upgrading to 0.12 😅

The crate uses a global mesh cache.

It is not being cleaned up at all, resulting to polluted cache, when:

• user does not render with a specific font anymore
• user creates glyphs with varying depths (maybe generate mesh with constant depth, and change vertice depths at runtime?)

See

An example/file, that would contain multiple different texts displaying the rendering result of various TextMesh options.

I haven't looked closely at how feasible this is, but it seems like it could solve #11 and #18, perhaps at some performance cost.

https://github.com/FrankenApps/meshtext

Not sure what type of asset ends up getting loaded in this case, but Res<Assets<TextMeshFont>>::get yields None without #mesh, so of course nothing would be displayed.

This is the result of me misreading the docs/examples but I feel like something should blow up or yell at me for this.