68d419d40f
Repeating timers will reset themselves upon finishing, carrying over any excess time during the last tick. This fixes timer drift upon resetting.
47 lines
1.5 KiB
Rust
47 lines
1.5 KiB
Rust
use bevy::prelude::*;
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fn main() {
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App::build()
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.add_default_plugins()
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.add_startup_system(setup.system())
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.add_system(animate_sprite_system.system())
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.run();
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}
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fn animate_sprite_system(
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texture_atlases: Res<Assets<TextureAtlas>>,
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mut query: Query<(&mut Timer, &mut TextureAtlasSprite, &Handle<TextureAtlas>)>,
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) {
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for (timer, mut sprite, texture_atlas_handle) in &mut query.iter() {
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if timer.finished {
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let texture_atlas = texture_atlases.get(&texture_atlas_handle).unwrap();
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sprite.index = ((sprite.index as usize + 1) % texture_atlas.textures.len()) as u32;
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}
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}
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}
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fn setup(
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mut commands: Commands,
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asset_server: Res<AssetServer>,
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mut textures: ResMut<Assets<Texture>>,
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mut texture_atlases: ResMut<Assets<TextureAtlas>>,
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) {
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let texture_handle = asset_server
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.load_sync(
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&mut textures,
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"assets/textures/rpg/chars/gabe/gabe-idle-run.png",
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)
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.unwrap();
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let texture = textures.get(&texture_handle).unwrap();
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let texture_atlas = TextureAtlas::from_grid(texture_handle, texture.size, 7, 1);
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let texture_atlas_handle = texture_atlases.add(texture_atlas);
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commands
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.spawn(Camera2dComponents::default())
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.spawn(SpriteSheetComponents {
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texture_atlas: texture_atlas_handle,
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scale: Scale(6.0),
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..Default::default()
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})
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.with(Timer::from_seconds(0.1, true));
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}
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