Module lifecycle 

Particle lifecycle management.

This module provides ergonomic tools for configuring particle lifecycles, including aging, death, visual effects, and respawning via emitters.

Hidden Lifecycle Fields

Every particle automatically has these fields (injected by the derive macro):

Field	Type	Description
age	f32	Time since spawn/respawn (seconds)
alive	u32	0 = dead (skip simulation), 1 = alive
scale	f32	Visual size multiplier (1.0 = normal)

These are accessible in custom WGSL rules via p.age, p.alive, p.scale.

Quick Start

Simulation::<Spark>::new()
    .with_lifecycle(|l| {
        l.lifetime(2.0)
         .fade_out()
         .emitter(Emitter::Point {
             position: Vec3::ZERO,
             rate: 500.0,
             speed: 1.0,
         });
    })
    .with_rule(Rule::Gravity(9.8))
    .run();

Lifecycle Presets

Common particle system patterns available as one-liners:

.with_lifecycle(Lifecycle::fire(Vec3::ZERO, 800.0))
.with_lifecycle(Lifecycle::fountain(Vec3::new(0.0, -0.5, 0.0), 1000.0))
.with_lifecycle(Lifecycle::explosion(Vec3::ZERO, 500))

Structs

Lifecycle

Lifecycle configuration builder.