2 releases
0.0.2 | Aug 19, 2022 |
---|---|
0.0.1 | Aug 8, 2022 |
#1075 in Game dev
705KB
2K
SLoC
🐕 Bevy Keith
2D graphic library inspired by Piet (📦 piet
) for the Bevy game engine.
Currently a purely immediate-mode library, but with future plans to explore partial retaining to reduce CPU usage.
Usage
Add a dependency to Cargo.toml
:
[dependencies]
bevy_keith = "0.0.2"
Add the KeithPlugin
to your Bevy app:
App::default()
.add_plugins(DefaultPlugins)
.add_plugin(KeithPlugin);
Add a Canvas
component where you want to draw. If you add the Canvas
on the same Entity
as an OrthographicProjection
component, then the canvas automatically resizes to the full orthographic camera area.
// Only for initial setup, or if controlled manually
let mut canvas = Canvas::new(Rect {
min: Vec2::splat(-400.),
max: Vec2::splat(100.),
});
// Optionally clear the canvas with a given color before drawing
canvas.set_background_color(Some(Color::BEIGE));
// Spawn on the same Entity as an OrthographicProjection for auto-resize
commands
.spawn_bundle(Camera2dBundle::default())
.insert(canvas);
Draw something on the Canvas
via a RenderContext
:
fn run(mut query: Query<&mut Canvas>) {
let mut canvas = query.single_mut();
canvas.clear();
let mut ctx = canvas.render_context();
// Draw a filled rectangle
let brush = ctx.solid_brush(Color::PINK);
let rect = Rect {
min: Vec2::ZERO,
max: Vec2::splat(50.),
};
ctx.fill(rect, &brush);
// Draw a text
let text = ctx
.new_layout("Hello World!")
.color(Color::ORANGE_RED)
.font(...)
.font_size(24.)
.build();
ctx.draw_text(text, Vec2::ZERO);
// Draw a textured rectangle
let rect = Rect {
min: Vec2::new(100., 150.),
max: Vec2::new(116., 166.),
};
ctx.draw_image(rect, my_res.image.clone());
// Draw some lines
let brush = ctx.solid_brush(Color::GREEN);
for i in 0..=10 {
ctx.line(Vec2::new(-200.5, 0.5 + i as f32 * 15.), Vec2::new(0.5, 0.5 + i as f32 * 40.), &brush, 1. + i as f32);
}
}
Features
- Primitives
- Text
- Axis-aligned rectangle
- Fill
- Stroke
- Single line
- Polyline
Dependencies
~41–56MB
~826K SLoC