Text is rendered with visibly incorrect offsets

[cart]

This is clearly visible in the "scene" example. It is less visible for "smaller" text.

[cart]

I think this has to do with us "offsetting" the text from "bottom" to "top" instead of from "top" to "bottom". I chose to go buttom->up because the bottom is where our origin is, but we might need to rethink this. Here is how ab_glyph does typesetting in their examples: https://github.com/alexheretic/ab-glyph/blob/master/dev/examples/image.rs

[inodentry]

TBH, the current "wavy" rendering looks kinda cute. I like the effect. ;)

That said, ofc this is a bug and should be fixed.

[mockersf]

the scene example is now fixed with #725, but there's still issue of wavy test...

scene fixed:
before: - after:

issue gets more noticeable with smaller text size (below 35 is more visible)

Code to display text example

use bevy::prelude::*;

fn main() {
    App::build()
        .add_default_plugins()
        .add_startup_system(setup.system())
        .run();
}

fn setup(
    mut commands: Commands,
    asset_server: Res<AssetServer>,
    mut materials: ResMut<Assets<ColorMaterial>>,
) {
    commands
        // 2d camera
        .spawn(UiCameraComponents::default());

    commands.spawn(NodeComponents {
        style: Style {
            flex_direction: FlexDirection::Column,
            ..Default::default()
        },
        material: materials.add(Color::NONE.into()),
        ..Default::default()
    });

    commands.with_children(|container| {
        for i in 0..10 {
            let size = (20 + i * 5) as f32;
            container
            .spawn(TextComponents {
                style: Style {
                    size: Size {
                        height: Val::Px(size  + 10.),
                        ..Default::default()

                    },
                    ..Default::default()
                },
                text: Text {
                    value: format!("{}: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed non risus. Suspendisse lectus tortor, dignissim sit amet, adipiscing nec, ultricies sed, dolor.", size),
                    font: asset_server.load("fonts/FiraSans-Bold.ttf"),
                    style: TextStyle {
                        font_size: size ,
                        color: Color::WHITE,
                    },
                },
                ..Default::default()
            });
        }
    });
}

before: - after:

[cart]

Arg nice catch. We should definitely leave this open.

[memoryruins]

Resolved by #765