57 lines
1.3 KiB
Rust
57 lines
1.3 KiB
Rust
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use bevy::{prelude::*, sprite::Mesh2dHandle};
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pub struct ParticleEffectPlugin;
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impl Plugin for ParticleEffectPlugin {
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fn build(&self, app: &mut App) {
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app
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.init_resource::<ParticleMesh>()
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.insert_resource(PoolCount(1000))
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.add_startup_system(particle_effect_startup);
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}
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}
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pub struct ParticleMesh {
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square: Mesh2dHandle,
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}
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impl FromWorld for ParticleMesh {
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fn from_world(world: &mut World) -> Self {
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let mut meshes = world.get_resource_mut::<Assets<Mesh>>().unwrap();
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Self {
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square: meshes
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.add(Mesh::from(shape::Quad {
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size: Vec2 { x: 4.0, y: 4.0 },
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flip: false,
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}))
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.into(),
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}
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}
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}
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pub struct PoolCount(usize);
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#[derive(Component)]
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pub struct ParticleComponent;
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fn particle_effect_startup(
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mut commands: Commands,
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particle_mesh: Res<ParticleMesh>,
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pool_count: ResMut<PoolCount>,
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mut materials: ResMut<Assets<ColorMaterial>>,
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) {
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for _p in 0 .. pool_count.0 {
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let color_mesh = ColorMesh2dBundle {
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mesh: particle_mesh.square.clone(),
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material: materials.add(ColorMaterial::from(Color::WHITE)),
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// default to invisible
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visibility: Visibility {is_visible: false},
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..default()
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};
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commands
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.spawn_bundle(color_mesh)
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.insert(ParticleComponent);
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}
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}
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