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.
Add a dependency to Cargo.toml:
toml
[dependencies]
bevy_keith = "0.0.2"
Add the KeithPlugin to your Bevy app:
rust
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.
```rust // 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.setbackgroundcolor(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:
```rust 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);
}
} ```