init: specs

.gitignore

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+/target

Cargo.toml

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+[package]
+name = "pp-particles"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

README.md

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+# A particles generator in rust for laser shows
+
+
+## Philosophy 
+
+This library should allow users to define their own particle behaviours
+
+- how many particles at start? min/max at any time? how many to add at any time?
+- how do particles behave? Are there different types? Different shapes?
+- how do particles react with real world? To audio? To a controller?
+
+## Constraints
+
+- Manages lists of points in the form {x,y,color} with color encoded as 12 bits (r,g,b)
+    - i.e. it doesn't speak to the laser directly, we use a middleware for that part (see. xxx)
+    - it can output to STDOUT or send to redis
+- Obviously be as fast as possible
+- Use a physics engine as a tool for collision detection, velocity and more
+    - Q: how do we enable custom behaviours (ex: reacting to audio)
+    - Q: how do we map physics engine object (ex: ball, square) for users as concept
+    - Q: how do we convert the physics engine objets to 2D points
+    - Q: how do we handle 3D? On by default? 
+- Be easy to use: good defaults for everything
+- Handle bounding and drawing boxes
+- Handle user custom particle properties (ex: decay, frequency, personality, etc.)
+- Handle additional drawings for the current frame due to custom events (ex: segment between two particles)
+
+## New project
+
+1. Clone lj_rust_template and edit draw.rs
+2. add lj_particle library crate
+3. edit the draw function 
+4. draw
+
+
+## Library struct/objects
+
+Particle
+- CentralPoint
+- Shape : Square, Triangle, Circle, 3DSphere : Trait<GeometricalShape>
+- UserData // custom ex: life decay, seed, created_at, frequency
+- Group 
+- PhysicsBody
+
+Point2D
+- coordinates(x,y)
+- velocity(x,y)
+- color(r,g,b)
+
+BoundingBox2D <Xmin,Xmax,Ymin,Ymax>
+PhysicsEngine
+PhysicsEngineConfig
+ParticlesList
+
+Config
+- ParticlesGroups: vec<<Particle>
+- RedisConf
+- PhysicsEngine
+
+OSCConfig
+- OSCCache
+- OSCServer <IP,Port>
+
+
+```rust
+
+use LJParticleSystem as ParticleSystem;
+use LJBoundingBox as BoundingBox;
+use LJClippingBox as ClippingBox;
+use LJRedilysis as Redilysis;
+use Rapier as PhysicsEngine;
+
+// Configure 
+let boundingbox  = BoundingBox();
+let clipping_box = ClippingBox();
+
+let particle_system = ParticleSystem( ParticleSystemConfig, PhysicsEngine, ClippingBox, BoundingBox );
+let redilysis  = Redilysis ( RedilysisConfig( file_path ) );
+
+
+// by default, equiprobability to generate a particle from any group
+particle_system.new_particle( lambda() => { ... }) 
+
+// some way to init the particles 
+world.init();
+
+particle_system.tick = lambda(){
+
+    // Configuration update if read via OSC 
+    current_config = self->getConfig();
+
+    // Retrieve bandwidth/bpm/rms info (with caching)
+    analysis = redilysis.update();
+
+    // Manage 
+    self.boundingBox();
+
+    self.physicsEngine();
+
+    for( particle in self.getParticles() ) {
+
+         
+
+
+    }
+
+
+    n_particles = current_config.particles_amount;
+
+    return self.clippingBox();
+
+
+}
+
+pub fn draw() -> Result<Vec<Point>, Box<dyn std::error::Error>> {
+    let mut v: Vec<Point> = vec![];
+    v.push( particle_system.tick() );
+    Ok(v)
+}
+
+```
+
+
+## OSC CONFIG
+
+S Server = (LJ) OSC Server and client
+eventual config
+ channel 1 : IP
+ channel X : IP
+
+R Rust = (LJ Particle) OSC Server and Client
+
+U User Interface = (Tablet) HTML Interface
+
+c Program Channel = configurable, uint ex: 1
+n Programe name = configurable, string ex: particle_foo_square
+
+Sequence Diagram
+
+```
+# Prerequisite : S is running and available and U is connected to S
+# R starts
+# R: Do you have my config already ?
+R -> S "/program/$c/$n/configure" 
+
+# C needs to stock which program is currently used for $n channel and its parameters
+
+# If no, C manifests the need to init the configuration
+C -> R "/program/$c/$n/no-config"
+
+# If no-config, R sends its default config for C to store
+R -> C "/program/$c/$n/var1 default_value1" # etc.
+
+# In any case, C sends to R the current config
+C -> R "/program/$c/$n/var1 value1" # etc.
+
+# C creates an event for the User to change  
+C -> U "/program/$c/$n" 
+
+# U can change the program configuration 
+U -> C "/program/$c/$n" 
+
+```
+
+
+## Features 
+
+- [ ] save to redis 
+- [ ] Use a 2D physics engine
+- [ ] Use attractors/repulsors objects
+- [ ] Use a 3D physics engine
+- [ ] Use OSC to update configuration

src/main.rs

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+fn main() {
+    println!("Hello, world!");
+}