2 files changed, 59 insertions(+), 0 deletions(-)

M crates/unified/src/lib.rs
A crates/unified/src/particle/mod.rs

@@ 24,3 24,4 @@ pub mod server;
 #[cfg(all(not(target_arch = "wasm32"), feature = "native"))]
 pub mod server_plugins;
 pub mod shared_plugins;
+pub mod particle;

@@ 0,0 1,58 @@
+use bevy::color::{Color, ColorCurve};
+use bevy::math::cubic_splines::LinearSpline;
+use bevy::math::Vec2;
+use rand::Rng;
+use serde::{Deserialize, Serialize};
+
+#[derive(Deserialize, Serialize)]
+pub struct ParticleEffect {
+    // -- lifetime / spawning -- //
+
+    /// Particle lifetime in seconds
+    pub lifetime_seconds: RandF32,
+    /// Delay inbetween each batch of particles spawned
+    pub batch_spawn_delay_seconds: RandF32,
+    /// Number of distinct particles spawned per batch
+    pub particles_in_batch: RandF32,
+
+    // -- velocity -- //
+
+    /// Initial linear velocity added to the particle's velocity when it is spawned
+    pub initial_linear_velocity: RandVec2,
+    /// Initial angular velocity added to the particle's rotation when it is spawned
+    pub initial_angular_velocity: RandF32,
+
+    // -- scale -- //
+
+    /// Scale curve over the lifetime of the particle
+    pub scale: LinearSpline<f32>,
+
+    // -- color -- //
+
+    /// Color curve over the lifetime of the particle
+    pub color: LinearSpline<Color>,
+}
+
+pub struct RandF32 {
+    pub value: f32,
+    pub randomness: f32
+}
+impl RandF32 {
+    pub fn sample(&self, rng: &mut impl Rng) -> f32 {
+        rng.random_range(self.value-self.randomness .. self.value+self.randomness)
+    }
+}
+
+pub struct RandVec2 {
+    pub x: RandF32,
+    pub y: RandF32,
+}
+impl RandVec2 {
+    pub fn sample(&self, rng: &mut impl Rng) -> Vec2 {
+        Vec2::new(self.x.sample(rng), self.y.sample(rng))
+    }
+}
+
+pub struct PColorCurve {
+    pub color: ColorCurve<Color>,
+}<
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