fix: less warnings, better logging for helios broadcast

* Rotate to rotate the image, !! Some point could be outside of the
  0-4096 range on x and y !!
  you should parameter a center and an angle. All the point will move
  around the center. The angle is un degre.
* Flip vertical: flip all the point verticaly. You should parameter an
  height where all point will flip
* Flip horizontaly. You should parameter an X corrodinate where all
  point will flip around.

Cargo.toml

@@ -6,12 +6,16 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+chrono = "0.4.26"
 config = "0.13.3"
 ctrlc = "3.4.0"
 env_logger = "0.10.0"
+ether-dream = "0.2.5"
 helios-dac = { version = "0.1", default-features = false, features = ["native"] }
+	   	       
 log = "0.4.18"
 redis = "0.23.0"
 ron = "0.8.0"
 serde = { version = "1.0.163", features = ["derive"] }
 toml = "0.7.4"
+nalgebra = "0.32.2"

README.md

@@ -0,0 +1,16 @@
+# LJ rust 
+
+## Crashcourse
+
+```shell
+
+# Copy and edit the settings file 
+$ cp copyme.settings.toml settings.toml
+
+# Populate the redis database 
+$ cargo run --example populate_redis
+
+# Run 
+$ cargo run --release 
+
+```

copyme.settings.toml

@@ -1,4 +1,4 @@
-# file: Settings.toml
+# file: settings.toml
 # Rename me !
 
 # The main key of your laser in LJ
@@ -12,17 +12,26 @@ redis_url = "redis://127.0.0.1:6379/"
 
 # Either Helios or Etherdream
 # For Helios. USB Device Id of the DAC 
-[dac.helios]
-id = 0
+#[dac.helios]
+#id = 0
+
+# For dummy dac:
+ [dac.dummy]
 
 # For Etherdream. IP of the DAC
 # [dac.etherdream]
-# url = "192.168.1.68"
+# ip = "192.168.1.68"
 
 [[transformers]]
 [transformers.translate]
 x = 2000
 y = 2000
+
 [[transformers]]
 [transformers.replicate]
 Until = 48
+
+# Never remove this : this is mandatory
+[[transformers]]
+[transformers.intensity]
+

examples/etherdream.rs

@@ -0,0 +1,151 @@
+extern crate ether_dream;
+
+use ether_dream::dac;
+
+fn main() {
+	println!("Listening for an Ether Dream DAC...");
+
+	let (dac_broadcast, source_addr) = ether_dream::recv_dac_broadcasts()
+		.expect("failed to bind to UDP socket")
+		.filter_map(Result::ok)
+		.next()
+		.unwrap();
+	let mac_address = dac::MacAddress(dac_broadcast.mac_address);
+
+	println!(
+		"Discovered DAC \"{}\" at \"{}\"! Connecting...",
+		mac_address, source_addr
+	);
+
+	// Establish the TCP connection.
+	let mut stream = dac::stream::connect(&dac_broadcast, source_addr.ip().clone()).unwrap();
+
+	// If we want to create an animation (in our case a moving sine wave) we need a frame rate.
+	let frames_per_second = 60.0;
+	// Lets use the DAC at an eighth the maximum scan rate.
+	let points_per_second = stream.dac().max_point_rate / 32;
+	// Determine the number of points per frame given our target frame and point rates.
+	let points_per_frame = (points_per_second as f32 / frames_per_second) as u16;
+
+	println!(
+		"Preparing for playback:\n\tframe_hz: {}\n\tpoint_hz: {}\n\tpoints_per_frame: {}\n",
+		frames_per_second, points_per_second, points_per_frame
+	);
+
+	// Prepare the DAC's playback engine and await the repsonse.
+	stream
+		.queue_commands()
+		.prepare_stream()
+		.submit()
+		.err()
+		.map(|err| {
+			eprintln!(
+				"err occurred when submitting PREPARE_STREAM \
+                      command and listening for response: {}",
+				err
+			);
+		});
+
+	println!("Beginning playback!");
+
+	// The sine wave used to generate points.
+	let mut sine_wave = SineWave {
+		point: 0,
+		points_per_frame,
+		frames_per_second,
+	};
+
+	// Queue the initial frame and tell the DAC to begin producing output.
+	let n_points = points_to_generate(stream.dac());
+	stream
+		.queue_commands()
+		.data(sine_wave.by_ref().take(n_points))
+		.begin(0, points_per_second)
+		.submit()
+		.err()
+		.map(|err| {
+			eprintln!(
+				"err occurred when submitting initial DATA and BEGIN \
+                      commands and listening for response: {}",
+				err
+			);
+		});
+	eprintln!("Stream dac{:?}", stream.dac());
+
+	// Loop and continue to send points forever.
+	loop {
+		// Determine how many points the DAC can currently receive.
+		let n_points = points_to_generate(stream.dac());
+		if let Err(err) = stream
+			.queue_commands()
+			.data(sine_wave.by_ref().take(n_points))
+			.submit()
+		{
+			eprintln!(
+				"err occurred when submitting DATA command and listening \
+                      for response: {}",
+				err
+			);
+			break;
+		}
+	}
+
+	// Tell the DAC to stop producing output and return to idle. Wait for the response.
+	//
+	// Note that the DAC is commanded to stop on `Drop` if this is not called and any errors
+	// produced are ignored.
+	stream
+		.queue_commands()
+		.stop()
+		.submit()
+		.expect("err occurred when submitting STOP command and listening for response");
+}
+
+// Determine the number of points needed to fill the DAC.
+fn points_to_generate(dac: &ether_dream::dac::Dac) -> usize {
+	dac.buffer_capacity as usize - 1 - dac.status.buffer_fullness as usize
+}
+
+// An iterator that endlessly generates a sine wave of DAC points.
+//
+// The sine wave oscillates at a rate of once per second.
+struct SineWave {
+	point: u32,
+	points_per_frame: u16,
+	frames_per_second: f32,
+}
+
+impl Iterator for SineWave {
+	type Item = ether_dream::protocol::DacPoint;
+	fn next(&mut self) -> Option<Self::Item> {
+		let coloured_points_per_frame = self.points_per_frame - 1;
+		let i = (self.point % self.points_per_frame as u32) as u16;
+		let hz = 1.0;
+		let fract = i as f32 / coloured_points_per_frame as f32;
+		let phase = (self.point as f32 / coloured_points_per_frame as f32) / self.frames_per_second;
+		let amp = (hz * (fract + phase) * 2.0 * std::f32::consts::PI).sin();
+		let (r, g, b) = match i {
+			i if i == coloured_points_per_frame || i < 13 => (0, 0, 0),
+			_ => (std::u16::MAX, std::u16::MAX, std::u16::MAX),
+		};
+		let x_min = std::i16::MIN;
+		let x_max = std::i8::MAX as i16;
+		let x = (x_min as f32 + fract * (x_max as f32 - x_min as f32)) as i16;
+		let y = (amp * x_max as f32) as i16;
+		let control = 0;
+		let (u1, u2) = (0, 0);
+		let p = ether_dream::protocol::DacPoint {
+			control,
+			x,
+			y,
+			i,
+			r,
+			g,
+			b,
+			u1,
+			u2,
+		};
+		self.point += 1;
+		Some(p)
+	}
+}

examples/populate_redis.rs

@@ -0,0 +1,34 @@
+use std::io::_print;
+/**
+
+# Populate Redis Example
+
+**This script simulates the redis content provided by the LJ Python / web tool**
+
+$ cargo run --example populate_redis
+ **/
+
+use redis::{
+	//RedisResult,
+	Client,
+	Commands,
+	Connection,
+};
+
+fn do_something() -> redis::RedisResult<()> {
+	let client = Client::open("redis://127.0.0.1/")?;
+	let mut con: Connection = client.get_connection()?;
+	let _ = con.set("/clientkey", "/pl/0/")?;
+	let _ = con.set("/EDH/0", "[[1.0, 0.0, 0.0],\n [ 0.0, 1.0, 0.0],\n [ 0.0, 0.0, 1.0]]")?;
+	let _ = con.set("/kpps/0", "5000")?;
+	let _ = con.set("/intensity/0", "255")?;
+	let _ = con.set("/pl/0/0", "[(1000, 2000, 0), (1000, 1000, 65535), (2000, 1000, 65535), (2000, 2000, 65535), (1000, 2000, 65535)]")?;
+	Ok(())
+}
+
+fn main() {
+	match do_something() {
+		Err(err)    => println!("Something wrong occured: {:?}", err),
+		Ok(..)                  => println!("Successfully inserted content in Redis")
+	}
+}

examples/test.rs

@@ -0,0 +1,46 @@
+///
+/// $ cargo run --example simple_client
+///
+
+use redis::{
+	//RedisResult,
+	Client,
+	Commands,
+	Connection,
+};
+
+use std::time::Instant;
+
+fn do_something() -> redis::RedisResult<()> {
+	let client = Client::open("redis://127.0.0.1/")?;
+	let mut con: Connection = client.get_connection()?;
+	let start = Instant::now();
+
+	loop {
+		let elapsed = start.elapsed();
+		let time = 60.0 * elapsed.as_millis() as f32 / 1000.0;
+
+		let mut v: Vec<(f32, f32, u32)> = vec![];
+
+		for i in 0..128 {
+			let a = (time + i as f32) / 128.0 * std::f32::consts::PI * 2.0;
+			let r = 1200.0 + (a * 5.0).cos() * (500.0 * (time / 5.0).cos());
+
+			let x = a.cos() * r;
+			let y = a.sin() * r;
+			let col = if i % 8 < 4 {
+				0x000000ff
+			} else {
+				0x00ff0000
+			};
+			v.push((x, y, col));
+		}
+		// println!("{:?}", v);
+		let _ = con.set("/pl/0/0", format!("{:?}", v))?;
+	}
+	// Ok(())
+}
+
+fn main() {
+	_ = do_something();
+}

src/conf.rs

@@ -1,6 +1,6 @@
 use config::Config;
 use serde::{Serialize, Deserialize};
-use crate::errors::LJResult;
+use crate::errors::{LJError, LJResult};
 use crate::transformer;
 
 #[derive(Serialize, Deserialize, Debug, Clone)]
@@ -10,7 +10,7 @@ pub struct Conf {
 	pub redis_url: String,
 	pub dac: DacFamily,
 	#[serde(default)]
-    pub transformers: Vec<TransformConf>
+	pub transformers: Vec<TransformConf>,
 }
 
 #[derive(Serialize, Deserialize, Debug, Clone)]
@@ -19,16 +19,18 @@ pub enum DacFamily {
 	Helios(HeliosConf),
 	#[serde(rename = "etherdream")]
 	Etherdream(EtherDreamConf),
+	#[serde(rename = "dummy")]
+	Dummy,
 }
 
 #[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct HeliosConf {
-    pub id: u8
+	pub id: u8,
 }
 
 #[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct EtherDreamConf {
-    pub url: String
+	pub ip: String,
 }
 
 #[derive(Serialize, Deserialize, Debug, Clone)]
@@ -36,7 +38,21 @@ pub enum TransformConf {
 	#[serde(rename = "translate")]
 	Translate(transformer::Translate),
 	#[serde(rename = "replicate")]
-    Replicate(transformer::Replicate)
+	Replicate(transformer::Replicate),
+	#[serde(rename = "rotate")]
+	Rotate(transformer::Rotate),
+	#[serde(rename = "flip_horizontal")]
+	FlipH(transformer::FlipHorizontal),
+	#[serde(rename = "flip_vertical")]
+	FlipV(transformer::FlipVertical),
+	#[serde(rename = "grid")]
+	Grid(transformer::Grid),
+	#[serde(rename = "homography")]
+	Homography(transformer::Homography),
+	#[serde(rename = "helios_to_etherdream")]
+	HeliosToEtherdream(transformer::HeliosToEtherdream),
+	#[serde(rename = "intensity")]
+	Intensity(transformer::Intensity),
 }
 
 
@@ -46,7 +62,7 @@ impl Conf {
 			.add_source(config::File::with_name(path))
 			.build()?;
 
-	let conf : Conf = settings.try_deserialize()?;
+		let conf: Conf = settings.try_deserialize().map_err(LJError::Config)?;
 		Ok(conf)
 	}
 
@@ -54,8 +70,15 @@ impl Conf {
 		let mut v = vec![];
 		for t in &self.transformers {
 			let t: Box<dyn transformer::Transformers> = match t {
+				TransformConf::FlipH(r) => Box::new(*r),
+				TransformConf::FlipV(r) => Box::new(*r),
+				TransformConf::Grid(r) => Box::new(*r),
+				TransformConf::HeliosToEtherdream(r) => Box::new(*r),
+				TransformConf::Homography(r) => Box::new(*r),
+				TransformConf::Intensity(r) => Box::new(*r),
+				TransformConf::Replicate(r) => Box::new(*r),
+				TransformConf::Rotate(r) => Box::new(*r),
 				TransformConf::Translate(t) => Box::new(*t),
-		TransformConf::Replicate(r) => Box::new(*r)
 			};
 			v.push(t);
 		}
@@ -64,14 +87,18 @@ impl Conf {
 
 	#[allow(dead_code)]
 	pub fn dump() {
-	let conf = Conf { laser_id: 0,
+		let conf = Conf {
+			laser_id: 0,
 			debug: true,
 			redis_url: "redis://127.0.0.1:6379/".to_string(),
 			dac: DacFamily::Helios(HeliosConf { id: 0 }),
 			transformers: vec![
-			      TransformConf::Translate(transformer::Translate::new(2000.0,2000.0)),
-			      TransformConf::Replicate(transformer::Replicate::Until(48))
-			  ]
+				TransformConf::Translate(transformer::Translate {
+					x: 2000.0,
+					y: 2000.0,
+				}),
+				TransformConf::Replicate(transformer::Replicate::Until(48)),
+			],
 		};
 		let s = toml::to_string(&conf).unwrap();
 		println!("{}", s);

src/device.rs

@@ -1,10 +1,15 @@
-use crate::point::Point;
-
 mod helios;
+mod dummy;
+mod etherdream;
 
-use crate::conf::{Conf, DacFamily, /*EtherDreamConf, HeliosConf*/};
+use std::fmt;
+use crate::conf::{Conf, DacFamily /*EtherDreamConf, HeliosConf*/};
 use crate::device::helios::HeliosDevice;
+use crate::device::dummy::DummyDevice;
 use crate::errors::LJResult;
+use crate::point::Point;
+use serde::Serialize;
+use crate::device::etherdream::EtherdreamDevice;
 
 /*
 self.protocol_version,
@@ -18,28 +23,49 @@ self.fullness,
 self.point_rate,
 self.point_count
 */
-
-
-pub struct Status {
-    pub active: bool,
-    pub last_traced_at: String,
-    pub properties: Vec<String>
+#[repr(u8)]
+#[derive(Debug, PartialEq, Serialize, Copy, Clone)]
+pub enum PlaybackState {
+	IDLE = 0,
+	PREPARE = 1,
+	PLAYING = 2
 }
 
+impl fmt::Display for PlaybackState {
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		write!(f, "{:?}", self)
+	}
+}
+
+#[derive(Debug)]
+pub struct Status {
+	pub last_traced_at: String,
+	pub properties: Vec<String>,
+	pub playback_state: PlaybackState,
+	pub capacity: usize,
+	pub lack: String,
+}
+
+// /lstt/lasernumber       etherdream last_status.playback_state  (0: idle   1: prepare   2: playing)
+// /cap/lasernumber        number of empty points sent to fill etherdream buffer (up to 1799)
+// /lack/lasernumber       "a": ACK   "F": Full  "I": invalid. 64 or 35 for no connection.
+
 pub trait Device {
-    fn status( &self ) -> Status;
+	fn status(&mut self) -> Status;
 	fn draw(
 		&mut self,
 		frame: Vec<Point>,
 		speed: u32,
 	) -> LJResult<()>;
 	fn stop(&mut self) -> LJResult<()>;
+	fn grid(&mut self) -> Vec<Point>;
 }
 
 pub fn device_factory(config: &Conf) -> LJResult<Box<dyn Device>> {
-	let device = match &config.dac {
+	let device: Box<dyn Device> = match &config.dac {
 		DacFamily::Helios(conf) => Box::new(HeliosDevice::new(conf)?),
-		DacFamily::Etherdream(_conf) => todo!(),
+		DacFamily::Etherdream( conf) => Box::new( EtherdreamDevice::new(conf)?),
+		DacFamily::Dummy => Box::new(DummyDevice::new()?)
 	};
 	Ok(device)
 }

src/device/common.rs

@@ -1,31 +0,0 @@
-
-/*
-self.protocol_version,
-self.le_state,
-self.playback_state,
-self.source,
-self.le_flags,
-self.playback_flags,
-self.source_flags,
-self.fullness,
-self.point_rate,
-self.point_count
-*/
-
-pub struct Status {
-    pub active: bool,
-    pub last_traced_at: String,
-    pub properties: Vec<String>
-}
-
-pub trait Device {
-    /**
-    fn intersect(&self, orig : &Vec3, dir : &Vec3) -> Option<Float>;
-    fn get_surface(&self, v : &Vec3) -> Vec3;
-    fn get_normal(&self, v : &Vec3) -> Vec3;
-    fn get_material(&self) -> &dyn Material;
-    **/
-
-    fn status( &self ) -> Status;
-
-}

src/device/dummy.rs

@@ -0,0 +1,43 @@
+use crate::device::{Device, Status, PlaybackState};
+use crate::errors::LJResult;
+use crate::point::{Color, Point};
+use log::debug;
+
+pub struct DummyDevice {
+    state: PlaybackState
+}
+
+impl DummyDevice {
+	pub fn new() -> LJResult<Self> {
+	    Ok(Self { state: PlaybackState::IDLE })
+	}
+}
+
+impl Device for DummyDevice {
+	fn status(&mut self) -> Status {
+		Status {
+			last_traced_at: "never".to_string(),
+			properties: vec!["foo".to_string()],
+			playback_state: self.state,
+			capacity: 0,
+			lack: "lack".to_string()
+		}
+	}
+
+	fn draw(&mut self,
+	        line: Vec<Point>,
+	        speed: u32,
+	) -> LJResult<()> {
+	    debug!("Draw Line at speed {speed} : {:?}", line);
+	    Ok(())
+	}
+
+	fn stop(&mut self) -> LJResult<()> {
+		Ok(())
+	}
+	fn grid(&mut self) -> Vec<Point> {
+		vec!(
+			Point{ x: 0 as f32, y: 0 as f32, color:Color{ r: 0, g: 0, b: 0 }}
+		)
+	}
+}

src/device/etherdream.rs

@@ -0,0 +1,308 @@
+#[warn(unused_imports)]
+use log::{ debug, info, warn};
+
+use std::net::SocketAddr;
+use std::thread::sleep;
+use ether_dream::dac::stream::{CommunicationError, connect};
+use ether_dream::dac::{Playback, Stream};
+use chrono::{DateTime, Utc};
+use std::time;
+use std::time::{Duration, SystemTime};
+
+use crate::conf::EtherDreamConf;
+use crate::device::{Device, Status, PlaybackState};
+use crate::errors::{LJError, LJResult};
+use crate::point::{Color, Point};
+use ether_dream::protocol::{DacBroadcast, DacResponse};
+
+
+#[warn(dead_code)]
+pub struct EtherdreamDevice {
+	pub conf: EtherDreamConf,
+	dac: DacBroadcast,
+	stream: Stream,
+
+	// "a": ACK   "F": Full  "I": invalid. 64 or 35 for no connection.
+	//     /// The previous command was accepted.
+	//     pub const ACK: u8 = 0x61;
+	//     /// The write command could not be performed because there was not enough buffer space when it
+	//     /// was received.
+	//     pub const NAK_FULL: u8 = 0x46;
+	//     /// The command contained an invalid `command` byte or parameters.
+	//     pub const NAK_INVALID: u8 = 0x49;
+	//     /// An emergency-stop condition still exists.
+	//     pub const NAK_STOP_CONDITION: u8 = 0x21;
+	// }
+	dac_response: u8,
+}
+
+impl EtherdreamDevice {
+	pub fn new(conf: &EtherDreamConf) -> LJResult<Self> {
+		let (dac, _source_address, stream) = EtherdreamDevice::connect(conf)?;
+		Ok(Self {
+			conf: (*conf).clone(),
+			dac,
+			stream,
+			dac_response: DacResponse::ACK,
+		})
+	}
+	fn connect(conf: &EtherDreamConf) -> LJResult<(DacBroadcast, SocketAddr, Stream)> {
+		let ip = &conf.ip;
+		let dac_broadcast = ether_dream::recv_dac_broadcasts()?;
+		dac_broadcast.set_timeout(Some(time::Duration::new(10, 0)))?;
+		info!("Attempting to get DAC broadcast...");
+		let broadcast = dac_broadcast
+			.take(3)
+			.filter_map(|result| {
+				match result {
+					Err(err) => {
+						warn!( "Failed to find a valid DAC via broadcast. Error: {:?}", err);
+						info!( "Retrying...");
+						None
+					}
+					Ok((dac, source_addr)) => {
+						info!("Valid broadcast, source_addr: {}", source_addr);
+						if source_addr.is_ipv6() {
+							warn!("Broadcast ignored: ipv6 address.");
+							return None;
+					        }
+						let src_ip = source_addr.ip().to_string();
+						if &src_ip != ip {
+							warn!("Broadcast ignored: expected {ip}, got: {src_ip} ");
+							return None;
+						}
+						Some(Ok((dac, source_addr)))
+					}
+				}
+			})
+			.next()
+			.expect("Failed to receive broadcast.");
+		match broadcast {
+			Err(err) => {
+				Err(Box::new(LJError::EtherdreamConnectError(err)))
+			}
+			Ok((dac, source_addr)) => {
+				info!("Trying to open TCP stream...");
+				let stream = EtherdreamDevice::get_tcp_stream(&dac, &source_addr)?;
+				info!("Finished configuring DAC and TCP stream.");
+				Ok((dac, source_addr, stream))
+			}
+		}
+	}
+
+	fn get_tcp_stream(dac: &DacBroadcast, source_address: &SocketAddr) -> LJResult<Stream> {
+		let mut stream = connect(dac, source_address.ip())?;
+		match stream
+			.queue_commands()
+			.prepare_stream()
+			.submit() {
+			Err(err) => warn!("err occurred when submitting PREPARE_STREAM command and listening for response: {}",err),
+			Ok(_) => info!("Prepared Stream.")
+		}
+		// If we want to create an animation (in our case a moving sine wave) we need a frame rate.
+		let frames_per_second = 60.0;
+		// Lets use the DAC at an eighth the maximum scan rate.
+		let points_per_second = stream.dac().max_point_rate / 32;
+		// Determine the number of points per frame given our target frame and point rates.
+		let points_per_frame = (points_per_second as f32 / frames_per_second) as u16;
+
+		let mut sine_wave = SineWave {
+			point: 0,
+			points_per_frame,
+			frames_per_second,
+		};
+
+		match stream
+			.queue_commands()
+			.data(sine_wave.by_ref().take(400))
+			// .data(begin_list.into_iter().take(400 as usize))
+			.begin(0, points_per_second)
+			.submit() {
+			Err(err) => warn!("err occurred when submitting first data: {}",err),
+			Ok(_) => info!("Sent first data to Etherdream.")
+		}
+
+		Ok(stream)
+	}
+
+	fn points_capacity(&self) -> usize {
+		/***
+		Determine the number of points needed to fill the DAC.
+		 ***/
+		// Fixme thread 'main' panicked at 'attempt to subtract with overflow', src/device/etherdream.rs:144:24
+		let n_points = self.dac.buffer_capacity as usize - self.stream.dac().dac.status.buffer_fullness as usize - 1;
+		n_points
+	}
+
+	fn ping(&mut self) -> LJResult<()> {
+
+		Ok(self.stream.queue_commands().ping().submit()?)
+
+	}
+}
+
+impl Device for EtherdreamDevice {
+	fn status(&mut self) -> Status {
+		let playback_state = match self.stream.dac().dac.status.playback {
+			Playback::Idle => PlaybackState::IDLE,
+			Playback::Prepared => PlaybackState::PREPARE,
+			Playback::Playing => PlaybackState::PLAYING,
+		};
+		let now = SystemTime::now();
+		let now: DateTime<Utc> = now.into();
+		let now = now.to_rfc3339();
+
+		Status {
+			last_traced_at: now,
+			properties: vec!["foo".to_string()],
+			playback_state,
+			capacity: self.points_capacity(),
+			lack: self.dac_response.to_string(),
+		}
+		// debug!("Dac Status: {:?} ", status );
+		// debug!("Etherdream Dac {:?} ", self.dac );
+		// debug!("Stream dac{:?}", self.stream.dac());
+		// status
+	}
+
+	fn draw(&mut self,
+	        line: Vec<Point>,
+	        _speed: u32,
+	) -> LJResult<()> {
+		let chunk_size = 64;
+		let points_iter = line.into_iter();
+		for chunk in  points_iter.as_slice().chunks(chunk_size){
+			debug!("New chunk length: {:?}", chunk.len());
+			loop {
+				let capacity = self.points_capacity();
+				if chunk.len() > capacity {
+					debug!("Sleep, capacity : {:?}", capacity);
+					// Sleep for 1/100th of a sec
+					sleep(Duration::new( 0,     10000000));
+					self.ping()?;
+				} else {
+					break;
+				}
+			}
+			debug!("drawing");
+			match self.stream
+				.queue_commands()
+				.data(
+					chunk.iter()
+						.map(|point| (*point).into())
+						.take(chunk_size)
+				)
+				.submit() {
+				Err(err) => {
+					// We should account for
+					// 'Broken pipe (os error 32)'
+					// Connection reset by peer (os error 104)
+					self.dac_response = match err {
+						CommunicationError::Io(err) => {
+							warn!("IO ERROR while drawing: '{}'",err);
+							DacResponse::ACK
+						}
+						CommunicationError::Protocol(err) => {
+							warn!("Protocol ERROR while drawing: '{}'",err);
+							DacResponse::ACK
+						}
+						CommunicationError::Response(err) => {
+							warn!("Response ERROR while drawing: '{}'",err);
+							err.response.response
+						}
+					};
+				}
+				Ok(_) => {
+					self.dac_response = DacResponse::ACK;
+					// debug!("Draw is ok");
+				}
+			};
+		}
+		Ok(())
+	}
+
+	fn stop(&mut self) -> LJResult<()> {
+		info!("Stopping Etherdream device...");
+		match self.stream
+			.queue_commands()
+			.stop()
+			.submit()
+		{
+			Err(err) => {
+				warn!("Failed to stop EtherDream device with error {:?}", err);
+				Err(Box::new(err))
+			}
+			Ok(_) => {
+				info!("Sucessfully closed EtherDream device.");
+				Ok(())
+			}
+		}
+	}
+
+	fn grid(&mut self) -> Vec<Point> {
+		let dim_mid = 16000.0;
+		let dim_max = 32000.0;
+		let col_min = Color { r: 0, g: 0, b: 0 };
+		let col_max = Color { r: 255, g: 255, b: 255 };
+
+		vec![
+			Point { x: -dim_max, y: dim_max, color: col_min },
+			Point { x: -dim_max, y: dim_max, color: col_max },
+			Point { x: dim_max, y: dim_max, color: col_max },
+			Point { x: dim_max, y: -dim_max, color: col_max },
+			Point { x: -dim_max, y: -dim_max, color: col_max },
+			Point { x: -dim_max, y: -dim_mid, color: col_min },
+			Point { x: -dim_mid, y: dim_mid, color: col_min },
+			Point { x: -dim_mid, y: dim_mid, color: col_max },
+			Point { x: dim_mid, y: dim_mid, color: col_max },
+			Point { x: dim_mid, y: -dim_mid, color: col_max },
+			Point { x: -dim_mid, y: -dim_mid, color: col_max },
+			Point { x: -dim_mid, y: -dim_mid, color: col_min },
+		]
+	}
+}
+
+// An iterator that endlessly generates a sine wave of DAC points.
+//
+// The sine wave oscillates at a rate of once per second.
+struct SineWave {
+	point: u32,
+	points_per_frame: u16,
+	frames_per_second: f32,
+}
+
+impl Iterator for SineWave {
+	type Item = ether_dream::protocol::DacPoint;
+	fn next(&mut self) -> Option<Self::Item> {
+		let coloured_points_per_frame = self.points_per_frame - 1;
+		let i = (self.point % self.points_per_frame as u32) as u16;
+		let hz = 1.0;
+		let fract = i as f32 / coloured_points_per_frame as f32;
+		let phase = (self.point as f32 / coloured_points_per_frame as f32) / self.frames_per_second;
+		let amp = (hz * (fract + phase) * 2.0 * std::f32::consts::PI).sin();
+		let (r, g, b) = match i {
+			i if i == coloured_points_per_frame || i < 13 => (0, 0, 0),
+			_ => (u16::MAX, u16::MAX, u16::MAX),
+		};
+		let x_min = i16::MIN;
+		let x_max = i16::MAX;
+		let x = (x_min as f32 + fract * (x_max as f32 - x_min as f32)) as i16;
+		let y = (amp * x_max as f32) as i16;
+		let control = 0;
+		let (u1, u2) = (0, 0);
+		let p = ether_dream::protocol::DacPoint {
+			control,
+			x,
+			y,
+			i,
+			r,
+			g,
+			b,
+			u1,
+			u2,
+		};
+		// debug!("{:?}",p);
+		self.point += 1;
+		Some(p)
+	}
+}

src/device/helios.rs

@@ -1,3 +1,4 @@
+use std::time::SystemTime;
 ///
 /// Configure udev:
 /// https://github.com/Grix/helios_dac/blob/master/docs/udev_rules_for_linux.md
@@ -11,13 +12,18 @@ use helios_dac::{
 	// Point as HeliosPoint,
 };
 use crate::conf::HeliosConf;
-use crate::device::{Device, Status};
+use crate::device::{Device, Status, PlaybackState};
 use crate::errors::{LJError, LJResult};
-use crate::point::Point;
+use crate::point::{Color, Point};
+use chrono::{DateTime, Utc};
 
 pub struct HeliosDevice {
 	pub conf: HeliosConf,
 	dac: NativeHeliosDac,
+	sent_points: u16,
+	state: PlaybackState,
+	lack: String,
+	last_traced_at: String,
 }
 
 impl HeliosDevice {
@@ -29,16 +35,30 @@ impl HeliosDevice {
 			return Err(Box::new(LJError::HeliosDeviceMissing));
 		};
 		let dac = device.open()?;
-		Ok(Self { conf: (*conf).clone(), dac })
+		let now = SystemTime::now();
+		let now: DateTime<Utc> = now.into();
+		let last_traced_at = now.to_rfc3339();
+
+		Ok(Self {
+			conf: (*conf).clone(),
+			dac,
+			sent_points: 0,
+			state: PlaybackState::PREPARE,
+			lack: "".to_string(),
+			last_traced_at,
+		})
 	}
 }
 
 impl Device for HeliosDevice {
-	fn status(&self) -> Status {
+	fn status(&mut self) -> Status {
+		let lack = self.lack.clone();
 		Status {
-			active: true,
-			last_traced_at: "now".to_string(),
+			last_traced_at: self.last_traced_at.clone(),
 			properties: vec!["foo".to_string()],
+			playback_state: self.state,
+			capacity: self.sent_points as usize,
+			lack,
 		}
 	}
 
@@ -46,12 +66,15 @@ impl Device for HeliosDevice {
 	        line: Vec<Point>,
 	        speed: u32,
 	) -> LJResult<()> {
-		while let Ok(DeviceStatus::NotReady) = self.dac.status() {
-		}
+		self.state = PlaybackState::IDLE;
+		while let Ok(DeviceStatus::NotReady) = self.dac.status() {}
+		self.state = PlaybackState::PLAYING;
 
 		let points: Vec<helios_dac::Point> = line.into_iter().map(|p| p.into()).collect();
-		let frame = Frame::new(speed, points);
+		let frame = Frame::new(speed, points.clone());
 		self.dac.write_frame(frame.clone())?;
+		self.sent_points = points.len() as u16;
+		self.last_traced_at = Utc::now().to_rfc3339();
 		Ok(())
 	}
 
@@ -59,4 +82,27 @@ impl Device for HeliosDevice {
 		self.dac.stop()?;
 		Ok(())
 	}
+
+	fn grid(&mut self) -> Vec<Point> {
+		let dim_min = 0 as f32;
+		let dim_mid = 2047.0;
+		let dim_max = 4095.0;
+		let col_min = Color { r: 0, g: 0, b: 0 };
+		let col_max = Color { r: 255, g: 255, b: 255 };
+
+		vec![
+			Point { x: dim_min, y: dim_max, color: col_min },
+			Point { x: dim_min, y: dim_max, color: col_max },
+			Point { x: dim_max, y: dim_max, color: col_max },
+			Point { x: dim_max, y: dim_min, color: col_max },
+			Point { x: dim_min, y: dim_min, color: col_max },
+			Point { x: dim_min, y: dim_min, color: col_min },
+			Point { x: dim_min, y: dim_mid, color: col_min },
+			Point { x: dim_min, y: dim_mid, color: col_max },
+			Point { x: dim_mid, y: dim_mid, color: col_max },
+			Point { x: dim_mid, y: dim_min, color: col_max },
+			Point { x: dim_min, y: dim_min, color: col_max },
+			Point { x: dim_min, y: dim_min, color: col_min },
+		]
+	}
 }

src/errors.rs

@@ -1,13 +1,17 @@
 use std::error::Error;
-use std::fmt;
+use std::{fmt, io};
 use redis::RedisError;
+use config::ConfigError;
 
 pub type LJResult<T> = Result<T, Box<dyn std::error::Error>>;
 
 #[derive(Debug)]
 pub enum LJError {
+	Config(ConfigError),
 	RedisConnect(RedisError),
-    HeliosDeviceMissing
+	HeliosDeviceMissing,
+	BadEDH,
+	EtherdreamConnectError(io::Error),
 }
 
 impl fmt::Display for LJError {
@@ -15,12 +19,21 @@ impl fmt::Display for LJError {
 		use LJError::*;
 
 		match self {
+			Config(err) => {
+				write!(f, "unable to load config file: {err}")
+			}
 			RedisConnect(err) => {
 				write!(f, "unable to connect to redis server: {err}")
-	    },
+			}
 			HeliosDeviceMissing => {
 				write!(f, "helios device not found")
 			}
+			BadEDH => {
+				write!(f, "EDH matrix is not a 3x3 matrix")
+			}
+			EtherdreamConnectError(err) => {
+				write!(f, "Failed to retrieve Etherdream device: {err}")
+			}
 		}
 	}
 }

src/framerate.rs

@@ -0,0 +1,39 @@
+use log::{debug, warn};
+use std::time::{Duration, Instant};
+use crate::errors::LJResult;
+use std::{thread};
+
+/// Converts helios Geometry to Helios
+#[derive(Debug, Clone, Copy)]
+pub struct Framerate {
+	prev_trace_time: Instant,
+	fps: u8,
+}
+
+impl Framerate {
+	pub fn new() -> LJResult<Self> {
+		Ok(Framerate {
+			prev_trace_time: Instant::now(),
+			fps: 20,
+		})
+	}
+	pub fn handle_time(&mut self) -> LJResult<()> {
+		let frame_time = 1000000000 / self.fps as u128;
+		let now = Instant::now();
+		// How long since last loop ?
+		let nanotime_spent = self.prev_trace_time.elapsed().as_nanos();
+		// Diw it go too fast? If so : sleep a bit
+		if frame_time > nanotime_spent {
+			let nanotime_towait = frame_time - nanotime_spent;
+			let dur = Duration::new(0, (nanotime_towait as f32 * 0.9) as u32);
+			// debug!("{:?} - {:?} : {:?}", nanotime_towait, self.prev_trace_time, now );
+			thread::sleep(dur);
+			debug!("Framerate OK");
+		} else {
+			warn!("Frame longer than expected {:?} > {:?}", nanotime_spent, frame_time, );
+		}
+
+		self.prev_trace_time = now;
+		Ok(())
+	}
+}

src/lib.rs

@@ -4,3 +4,5 @@ pub mod errors;
 pub mod device;
 pub mod point;
 pub mod transformer;
+pub mod worldstate;
+pub mod framerate;

src/main.rs

@@ -8,6 +8,8 @@ mod errors;
 mod point;
 mod transformer;
 mod device;
+mod worldstate;
+mod framerate;
 
 use device::device_factory;
 use std::sync::atomic::{AtomicBool, Ordering};
@@ -15,10 +17,12 @@ use std::sync::Arc;
 use redis_ctrl::{RedisCtrl, Order};
 use conf::Conf;
 use errors::LJResult;
-use point::Point;
+use point::{Point, Color};
 use transformer::Transformers;
 use log::{LevelFilter, info, /* warn, */ error};
 use env_logger::Builder;
+use worldstate::WorldState;
+use framerate::Framerate;
 
 const DEFAULT_CONF_FILE: &str = "settings.toml";
 
@@ -31,7 +35,15 @@ pub fn main() {
 	}
 }
 
+
 fn run_all() -> LJResult<()> {
+	// Setup handler for interrupt Signals
+	let running = Arc::new(AtomicBool::new(true));
+	let r = running.clone();
+	ctrlc::set_handler(move || {
+		r.store(false, Ordering::SeqCst);
+	})?;
+
 	// Setup configuration file and set up logs
 	let filename = std::env::args().nth(1).unwrap_or_else(|| {
 		DEFAULT_CONF_FILE.to_string()
@@ -45,35 +57,71 @@ fn run_all() -> LJResult<()> {
 	info!("{:?}", config);
 
 	// Setup Redis Service
-	let mut rs = RedisCtrl::new(&config.redis_url)?;
+	let mut rs = RedisCtrl::new(&config.redis_url, &config.laser_id)?;
+
+	let mut world_state = rs.init_world_state().unwrap();
+	info!("WorldState: {:?}", world_state);
 
-	// Setup handler for interrupt Signals
-	let running = Arc::new(AtomicBool::new(true));
-	let r = running.clone();
-	ctrlc::set_handler(move || {
-		r.store(false, Ordering::SeqCst);
-	})?;
 
 	// Setup Laser Device based on conf
 	let mut tracer = device_factory(&config)?;
-
-	// can't work, but we can add + Debug to Device to make it work...
-	//dbg!(tracer);
+	world_state.grid = tracer.grid();
 
 	// Setup geometry transformers on points lists
 	let transformers = config.get_transformers();
 
+	// Setup framerate limiter
+	let mut framerate_handler = Framerate::new()?;
+
 	// Dispatch based on redis requests
 	while running.load(Ordering::SeqCst) {
+		rs.set_status(tracer.status())?;
+		framerate_handler.handle_time()?;
 		let order = rs.get_order(config.laser_id)?;
-		if order != Order::Draw {
+		match order {
+			Order::Draw | Order::Black | Order::Grid => {
+				// 0 : Draw Normal point list
+				// 2 : Draw BLACK point list
+				// 3 : Draw GRID point list
+				world_state.draw_black = order == Order::Black;
+				world_state.draw_grid = order == Order::Grid;
+				let frame = get_next_frame(
+					&config,
+					&transformers,
+					&mut rs,
+					&world_state,
+				)?;
+				// For now, draw all the time
+				tracer.draw(frame, world_state.kpps)?;
+			}
+			Order::Intensity => {
+				// 6 : Max Intensity Change     = reread redis key /intensity
+				world_state.intensity = rs.get_int("intensity")?
+					.try_into()?;
+			}
+			Order::Edh => {
+				// 1 : Get the new EDH          = reread redis key /EDH/lasernumber
+				world_state.edh = rs.get_edh()?;
+			}
+			Order::Kpps => {
+				// 7 : kpps change              = reread redis key /kpps
+				world_state.kpps = rs.get_int("kpps")?;
+			}
+			Order::ClientKey => {
+				world_state.client_key = rs.get_client_key()?;
+			}
+			Order::ColorBalance => {
+				let (r, g, b) = rs.get_color_balance()?;
+				world_state.color_balance = Color { r, g, b };
+			}
+			Order::Resampler => {
+				world_state.resampler = rs.get_resampler()?;
+			}
+			_ => {
+				// 9 : poweroff LJ
 				info!("Order: {:?}", order);
 			}
-
-		let frame = get_next_frame(&config, &transformers,
-		                           &mut rs, order == Order::Black)?;
-		// For now, draw all the time
-		tracer.draw(frame, 10_000)?;
+		}
 	}
 
 	info!("Exiting, stoping device.");
@@ -83,15 +131,18 @@ fn run_all() -> LJResult<()> {
 
 fn init_logging(config: &LJResult<Conf>) {
 	if let Ok(ref config) = config {
-		if config.debug {
+		let level = if config.debug {
+			LevelFilter::Debug
+		} else {
+			LevelFilter::Info
+		};
 		let mut builder = Builder::from_default_env();
 		builder
-				.filter(None, LevelFilter::Info)
+			.filter(None, level)
 			.init();
 		info!("Debug mode enabled from configuration file");
 		return;
 	}
-	}
 	info!("Logging level inherited from env");
 	env_logger::init();
 }
@@ -100,14 +151,50 @@ fn get_next_frame(
 	config: &Conf,
 	transformers: &[Box<dyn Transformers>],
 	rs: &mut RedisCtrl,
-	_black: bool,
+	world_state: &WorldState,
 ) -> LJResult<Vec<Point>> {
-	let line = rs.get(&format!("/pl/{}/0", config.laser_id))?;
-	let mut line: Vec<Point> = line.into_iter().map(|tpl| tpl.into()).collect();
+	let format_key = format!("{}{}",
+	                         world_state.client_key,
+	                         config.laser_id);
+
+	// Handle the grid case
+
+	let mut line: Vec<Point> = if world_state.draw_grid {
+		world_state.grid.clone()
+	} else {
+		let redis_line = rs.get_line(&format_key)?;
+		redis_line.into_iter()
+			.map(|tpl| tpl.into())
+			.collect()
+	};
+
 	for transformer in transformers {
-		line = transformer.apply(&line);
+		line = transformer.apply(&line, world_state);
 	}
 
+	// info!("Draw Black -> {}", world_state.draw_black);
+	// info!("Draw Grid -> {}", world_state.draw_grid);
+
+	// LIMITER and BLACK
+	line = line.into_iter()
+		.map(|p| {
+			let color = if world_state.draw_black {
+				Color { r: 0, g: 0, b: 0 }
+			} else {
+				Color {
+					r: p.color.r.min(world_state.intensity),
+					g: p.color.g.min(world_state.intensity),
+					b: p.color.b.min(world_state.intensity),
+				}
+			};
+			Point {
+				color,
+				..p
+			}
+		})
+		.collect();
+
 	//info!("Line: {:?}", line);
 	Ok(line)
 }
+

src/point.rs

@@ -1,15 +1,39 @@
-#[derive(Debug,Clone,Copy)]
+use ether_dream::protocol::DacPoint;
+use std::ops::Mul;
+
+
+#[derive(Debug, Clone, Copy, Default, PartialEq)]
 pub struct Point {
 	pub x: f32,
 	pub y: f32,
-    pub color: Color
+	pub color: Color,
 }
 
-#[derive(Debug,Clone,Copy)]
+#[derive(Debug, Clone, Copy, Default, PartialEq)]
 pub struct Color {
-    r: u8,
-    g: u8,
-    b: u8
+	pub r: u8,
+	pub g: u8,
+	pub b: u8,
+}
+impl Mul<u8> for Color {
+    type Output = Self;
+
+    fn mul(self, rhs: u8) -> Self {
+	    Self{
+		    r: (255 * self.r as u16 / rhs as u16) as u8,
+		    g: (255 * self.g as u16 / rhs as u16) as u8,
+		    b: (255 * self.b as u16 / rhs as u16) as u8,
+	    }
+    }
+}
+
+impl From<Color> for u32 {
+	fn from(value: Color) -> Self {
+		let r = value.r as u32;
+		let g = value.g as u32;
+		let b = (value.b) as u32;
+		(r << 16) + (g << 8) + b
+	}
 }
 
 impl From<(f32, f32, u32)> for Point {
@@ -28,7 +52,30 @@ impl From<Point> for helios_dac::Point {
 		helios_dac::Point {
 			coordinate: (x, y).into(),
 			color: helios_dac::Color::new(pt.color.r, pt.color.g, pt.color.b),
-	    intensity: 0xFF
+			intensity: 0xFF,
 		}
 	}
 }
+
+impl From<Point> for DacPoint {
+	fn from(pt: Point) -> DacPoint {
+		let control = 0;
+		let (u1, u2) = (0, 0);
+		let i = 0;
+		let x = pt.x.clamp(-32000.0, 32000.0);
+		let y = pt.y.clamp(-32000.0, 32000.0);
+		let pt = DacPoint {
+			control,
+			x: x as i16,
+			y: y as i16,
+			i,
+			r: (pt.color.r as u16) * 255,
+			g: (pt.color.g as u16) * 255,
+			b: (pt.color.b as u16) * 255,
+			u1,
+			u2,
+		};
+		// debug!("point {:?}", pt);
+		pt
+	}
+}

src/redis_ctrl.rs

@@ -1,12 +1,15 @@
 use redis::{Client, Commands, Connection};
 use ron::de::from_str;
+use crate::device::Status;
 use crate::errors::{LJError, LJResult};
+use crate::worldstate::{WorldState, EDH};
+// use log::info;
 
 #[repr(u8)]
 #[derive(Debug, PartialEq)]
 pub enum Order {
 	Draw = 0,
-    Edh, //homography
+	Edh,
 	Black,
 	Grid,
 	Resampler,
@@ -14,6 +17,7 @@ pub enum Order {
 	Intensity,
 	Kpps,
 	ColorBalance,
+	PowerOff
 }
 
 impl TryFrom<u8> for Order {
@@ -36,33 +40,41 @@ impl TryFrom<u8> for Order {
 			6 => Intensity,
 			7 => Kpps,
 			8 => ColorBalance,
+			9 => PowerOff,
 			_ => unreachable!()
 		})
 	}
 }
 
 pub type Line = Vec<(f32, f32, u32)>;
+pub type Resampler = Vec<Vec<(f32,f32)>>;
 
 pub struct RedisCtrl {
 	pub client: Client,
 	pub connection: Connection,
+	laser_id: u8,
 }
 
 impl RedisCtrl {
-    pub fn new(url: &str) -> LJResult<Self> {
+	pub fn new(url: &str, laser_id: &u8) -> LJResult<Self> {
 		let client = Client::open(url)
 			.map_err(LJError::RedisConnect)?;
 		let connection = client.get_connection()
 			.map_err(LJError::RedisConnect)?;
-        Ok(RedisCtrl { client, connection })
+		Ok(RedisCtrl { client, connection, laser_id: *laser_id })
 	}
 
-    pub fn get(&mut self, key: &str) -> LJResult<Line> {
+	pub fn get_line(&mut self, key: &str) -> LJResult<Line> {
 		let val: String = self.connection.get(key)?;
 		let line: Line = from_str(&val)?;
 		Ok(line)
 	}
 
+	pub fn set(&mut self, key: String, value: String) -> LJResult<()> {
+		self.connection.set(key, value)?;
+		Ok(())
+	}
+
 	pub fn get_order(&mut self, id: u8) -> LJResult<Order> {
 		let path = format!("/order/{id}");
 		let val: u8 = self.connection.get(path.clone())?;
@@ -73,4 +85,59 @@ impl RedisCtrl {
 
 		Ok(val.try_into()?)
 	}
+
+	pub fn set_status(&mut self, status: Status) -> LJResult<()> {
+		let lstt_key = format!("/lstt/{}", self.laser_id);
+		let cap_key = format!("/cap/{}", self.laser_id);
+		let lack_key = format!("/lack/{}", self.laser_id);
+		self.set(lstt_key, status.playback_state.to_string())?;
+		self.set(cap_key, status.capacity.to_string())?;
+		self.set(lack_key, status.lack.to_string())?;
+		Ok(())
+	}
+
+	pub fn init_world_state(&mut self) -> LJResult<WorldState> {
+		Ok(WorldState {
+			client_key: self.get_client_key()?,
+			edh: self.get_edh()?,
+			kpps: self.get_int("kpps")?.try_into()?,
+			intensity: self.get_int("intensity")?.try_into()?,
+			..WorldState::default()
+		})
+	}
+
+	pub fn get_edh(&mut self) -> LJResult<EDH> {
+		// Get new EDH
+		let edh_key = format!("/EDH/{}", self.laser_id);
+		let edh: String = self.connection.get(edh_key)?;
+		let edh: Vec<Vec<f32>> = from_str(&edh)?;
+		let edh = EDH::new(edh)?;
+		Ok(edh)
+	}
+
+	pub fn get_client_key(&mut self) -> LJResult<String> {
+		let key: String = self.connection.get("/clientkey")?;
+		Ok(key)
+	}
+
+	pub fn get_color_balance(&mut self) -> LJResult<(u8, u8, u8)> {
+		Ok((
+			self.connection.get("/red")?,
+			self.connection.get("/green")?,
+			self.connection.get("/blue")?,
+		))
+	}
+
+	pub fn get_resampler(&mut self ) -> LJResult<Resampler> {
+		let val: String = self.connection.get(format!("/resampler/{}", self.laser_id))?;
+		let resampler : Resampler = from_str(&val)?;
+		Ok(resampler)
+	}
+
+	pub fn get_int(&mut self, key: &str) -> LJResult<u32> {
+		// Get new Int
+		let fmt = format!("/{key}/{}", self.laser_id);
+		let val: u32 = self.connection.get(fmt)?;
+		Ok(val)
+	}
 }

src/transformer.rs

@@ -1,13 +1,31 @@
-//pub mod common;
-mod translate;
+mod flip_horizontal;
+mod flip_vertical;
+mod grid;
+mod helios_to_etherdream;
+mod homography;
+mod intensity;
 mod replicate;
+mod rotate;
+mod translate;
 
 use crate::point::Point;
+use crate::worldstate::WorldState;
 
 // re-export transformers to be abe to use it directly from transformer::
 pub use translate::Translate;
 pub use replicate::Replicate;
+pub use rotate::Rotate;
+pub use flip_horizontal::FlipHorizontal;
+pub use flip_vertical::FlipVertical;
+pub use grid::Grid;
+pub use self::homography::Homography;
+pub use helios_to_etherdream::HeliosToEtherdream;
+pub use intensity::Intensity;
 
 pub trait Transformers {
-    fn apply(&self, point_list: &[Point]) -> Vec<Point>;
+    fn apply(
+	&self,
+	point_list: &[Point],
+	world_state: &WorldState
+    ) -> Vec<Point>;
 }

src/transformer/flip_horizontal.rs

@@ -0,0 +1,24 @@
+use crate::transformer::Transformers;
+use crate::point::Point;
+use crate::worldstate::WorldState;
+
+use serde::{Serialize,Deserialize};
+
+/// Flip Horizontal
+
+#[derive(Serialize,Deserialize,Debug,Clone,Copy)]
+pub struct FlipHorizontal {
+    x: f32,
+}
+
+impl Transformers for FlipHorizontal {
+    fn apply(&self, point_list: &[Point], _ws: &WorldState) -> Vec<Point> {
+    point_list.iter()
+        .map(| pt | {
+            let dx = pt.x - self.x;
+            Point { x: dx - 2. * dx,
+                ..*pt
+            }
+        }).collect()
+    }
+}

src/transformer/flip_vertical.rs

@@ -0,0 +1,24 @@
+use crate::transformer::Transformers;
+use crate::point::Point;
+use crate::worldstate::WorldState;
+
+use serde::{Serialize,Deserialize};
+
+/// Flip Vertical
+
+#[derive(Serialize,Deserialize,Debug,Clone,Copy)]
+pub struct FlipVertical {
+    y: f32,
+}
+
+impl Transformers for FlipVertical {
+    fn apply(&self, point_list: &[Point], _ws: &WorldState) -> Vec<Point> {
+    point_list.iter()
+        .map(| pt | {
+            let dy = pt.y - self.y;
+            Point { y: dy - 2. * dy,
+                ..*pt
+            }
+        }).collect()
+    }
+}

src/transformer/grid.rs

@@ -0,0 +1,58 @@
+use crate::transformer::Transformers;
+use crate::point::Point;
+use crate::worldstate::WorldState;
+
+use serde::{Serialize,Deserialize};
+
+/// Translate
+
+#[derive(Serialize,Deserialize,Debug,Clone,Copy)]
+pub struct Grid {
+    width: f32,
+    height: f32
+}
+
+fn square_box(size: f32, color: u32) -> Vec<(f32, f32, u32)> {
+    vec![
+	(-size, -size, 0),
+	(-size, -size, color),
+
+	(0.0, -size, color),
+	(0.0, -size, color),
+	
+	(size, -size, color),
+	(size, -size, color),
+
+	(size, 0.0, color),
+	(size, 0.0, color),
+
+	(size, size,  color),
+	(size, size,  color),
+
+	(0.0, size,  color),
+	(0.0, size,  color),
+
+	(-size, size,  color),
+	(-size, size,  color),
+
+	(-size, 0.0,  color),
+	(-size, 0.0,  color),	
+
+	(-size, -size,  color),
+	(-size, -size,  color),
+
+	(-size, -size, 0)
+    ]
+}
+
+impl Transformers for Grid {
+    fn apply(&self, _point_list: &[Point], _ws: &WorldState) -> Vec<Point> {
+	let mut sq1 = square_box(1000.0, 255 << 8);
+	let mut line = square_box(2000.0, 255);
+	line.append(&mut sq1);
+
+	let line: Vec<Point> = line.into_iter()
+	    .map(|tpl| tpl.into()).collect();
+	line
+    }
+}

src/transformer/helios_to_etherdream.rs

@@ -0,0 +1,27 @@
+use crate::transformer::Transformers;
+use crate::point::Point;
+use crate::worldstate::WorldState;
+
+use serde::{Serialize, Deserialize};
+
+/// Converts helios Geometry to Helios
+#[allow(dead_code)]
+#[derive(Serialize, Deserialize, Debug, Clone, Copy)]
+pub struct HeliosToEtherdream {
+}
+
+impl Transformers for HeliosToEtherdream {
+	fn apply(&self, point_list: &[Point], _ws: &WorldState) -> Vec<Point> {
+		// debug!("list helios {:?}", point_list);
+		let out = point_list.iter().map(|pt| {
+			Point {
+				x: 8.0 * (pt.x - 2047.0),
+				y: 8.0 * (pt.y - 2047.0),
+				..*pt
+			}
+		}).collect();
+		// debug!("list etherdream {:?}", out);
+		out
+	}
+}
+

src/transformer/homography.rs

@@ -0,0 +1,64 @@
+use crate::transformer::Transformers;
+use crate::point::Point;
+use crate::worldstate::{WorldState,EDH};
+use serde::{Serialize,Deserialize};
+
+/// Homography
+
+#[derive(Serialize,Deserialize,Debug,Clone,Copy)]
+pub struct Homography {}
+
+impl Transformers for Homography {
+    fn apply(&self, point_list: &[Point], ws: &WorldState) -> Vec<Point> {	
+	let edh : &EDH = &ws.edh;
+
+	point_list.iter()
+	    .map(| point | edh.apply(point))
+	    .collect()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn identity_matrix_let_point_unchanged() {
+	let p0 = Point { x: -1500.0, y: 1500.0, ..Point::default() };
+
+	let edh = EDH::new(vec![
+	    vec![ 1.0, 0.0, 0.0 ],
+	    vec![ 0.0, 1.0, 0.0 ],
+	    vec![ 0.0, 0.0, 1.0 ]
+	]).unwrap();
+
+	let ws = WorldState { edh : edh, ..WorldState::default() };
+	
+	let homography = Homography{};
+	let result = homography.apply(&[p0], &ws);
+	
+	assert_eq!(result, vec![Point { x: -1500.0,
+					y: 1500.0,
+					..Point::default() }]);
+    }
+
+    #[test]
+    fn rotation_matrix_rotate_the_point() {
+	let p0 = Point { x: -1500.0, y: 1500.0, ..Point::default() };
+
+	let edh = EDH::new(vec![
+	    vec![ 1.24107321e-03, 1.00500127e-03, 7.15439347e-01],
+	    vec![-9.93223912e-04, 1.22652939e-03,-6.98671238e-01],
+	    vec![ 1.06017142e-17,-4.69459541e-17, 3.32700590e-05]
+	]).unwrap();
+
+	let ws = WorldState { edh : edh, ..WorldState::default() };
+	
+	let homography = Homography{};
+	let result = homography.apply(&[p0], &ws);
+	
+	assert_eq!(result, vec![Point { x: 10860.557,
+					y: 79078.87,
+					..Point::default() }]);
+    }
+}

src/transformer/intensity.rs

@@ -0,0 +1,28 @@
+use log::debug;
+use crate::transformer::Transformers;
+use crate::point::Point;
+use crate::worldstate::WorldState;
+
+use serde::{Serialize, Deserialize};
+
+/// Converts helios Geometry to Helios
+#[allow(dead_code)]
+#[derive(Serialize, Deserialize, Debug, Clone, Copy)]
+pub struct Intensity {
+}
+
+impl Transformers for Intensity {
+	fn apply(&self, point_list: &[Point], ws: &WorldState) -> Vec<Point> {
+		// debug!("list helios {:?}", point_list);
+		let out = point_list.iter().map(|pt| {
+			Point {
+				x: pt.x,
+				y: pt.y,
+				color: pt.color * ws.intensity
+			}
+		}).collect();
+		debug!("list intensity {:?}", out);
+		out
+	}
+}
+

src/transformer/replicate.rs

@@ -1,5 +1,7 @@
 use crate::transformer::Transformers;
 use crate::point::Point;
+use crate::worldstate::WorldState;
+
 use serde::{Serialize,Deserialize};
 
 /// Replicate
@@ -12,7 +14,7 @@ pub enum Replicate {
 }
 
 impl Transformers for Replicate {
-    fn apply(&self, point_list: &[Point]) -> Vec<Point> {
+    fn apply(&self, point_list: &[Point], _ws: &WorldState) -> Vec<Point> {
 	let mut point_list2 = vec![];
 	match self {
 	    Replicate::Until(n) => {

src/transformer/rotate.rs

@@ -0,0 +1,35 @@
+use crate::transformer::Transformers;
+use crate::point::Point;
+use crate::worldstate::WorldState;
+
+use serde::{Serialize,Deserialize};
+//use std::f32::consts::PI;
+
+/// Rotate
+
+#[derive(Serialize,Deserialize,Debug,Clone,Copy)]
+pub struct Rotate {
+    cx: f32,
+    cy: f32,
+    angle: f32,
+
+}
+
+impl Transformers for Rotate {
+    fn apply(&self, point_list: &[Point], _ws: &WorldState) -> Vec<Point> {
+    point_list.iter()
+        .map(| pt | {
+            let dx = pt.x - self.cx;
+            let dy = pt.y - self.cy;
+            let cos = self.angle.cos();
+            let sin = self.angle.sin();
+            let x = (dx * cos - dy * sin) + self.cx; 
+            let y = (dx * sin + dy * cos) + self.cy; 
+            Point { x,
+                y,
+                ..*pt
+            }
+        }).collect()
+    }
+}
+

src/transformer/translate.rs

@@ -1,23 +1,18 @@
 use crate::transformer::Transformers;
 use crate::point::Point;
+use crate::worldstate::WorldState;
 use serde::{Serialize,Deserialize};
 
 /// Translate
 
 #[derive(Serialize,Deserialize,Debug,Clone,Copy)]
 pub struct Translate {
-    x: f32,
-    y: f32
-}
-
-impl Translate {
-    pub fn new(x: f32, y: f32) -> Self {
-	Self { x, y }
-    }
+    pub x: f32,
+    pub y: f32
 }
 
 impl Transformers for Translate {
-    fn apply(&self, point_list: &[Point]) -> Vec<Point> {
+    fn apply(&self, point_list: &[Point], _ws: &WorldState) -> Vec<Point> {	
 	point_list.iter()
 	    .map(| pt | {
 		Point { x: pt.x + self.x,

src/worldstate.rs

@@ -0,0 +1,54 @@
+use crate::point::{Point, Color};
+use nalgebra::base::{Matrix3, Matrix1x3};
+use crate::errors::{LJError, LJResult};
+use log::debug;
+use crate::redis_ctrl::Resampler;
+
+#[derive(Debug, Default)]
+pub struct EDH {
+	pub matrix: Matrix3<f32>,
+}
+
+impl EDH {
+	pub fn new(vec: Vec<Vec<f32>>) -> LJResult<EDH> {
+		if vec.len() != 3 ||
+			vec[0].len() != 3 ||
+			vec[1].len() != 3 ||
+			vec[2].len() != 3 {
+			return Err(Box::new(LJError::BadEDH));
+		}
+
+		// this is the matrix already transposed.
+		let matrix = Matrix3::new(vec[0][0], vec[1][0], vec[2][0],
+		                          vec[0][1], vec[1][1], vec[2][1],
+		                          vec[0][2], vec[1][2], vec[2][2]);
+
+		Ok(EDH { matrix })
+	}
+
+	pub fn apply(&self, point: &Point) -> Point {
+		let p = Matrix1x3::new(point.x, point.y, 1.0);
+		let p = p * self.matrix;
+		let new_p = Point { x: p[0] / p[2], y: p[1] / p[2], ..*point };
+
+		debug!("{:?} => {:?}", point, new_p);
+
+		new_p
+	}
+}
+
+#[derive(Debug, Default)]
+pub struct WorldState {
+	pub edh: EDH,
+	pub resampler: Resampler,
+	pub client_key: String,
+	pub intensity: u8,
+	pub kpps: u32,
+	pub color: Color,
+	pub draw_black: bool,
+	pub draw_grid: bool,
+	pub grid: Vec<Point>,
+	pub color_balance: Color,
+}
+
+impl WorldState {}

tests/settings/valid_etherdream.toml

@@ -12,4 +12,4 @@ redis_url = "redis://127.0.0.1:6379/"
 
 # For Etherdream. IP of the DAC
 [dac.etherdream]
-url = "192.168.1.68"
+ip = "192.168.1.68"

tests/test_conf.rs

@@ -28,7 +28,7 @@ fn it_finds_struct_fields() {
 fn it_finds_etherdream_fields() {
     let config = Conf::new("tests/settings/valid_etherdream").unwrap();
     assert!(match config.dac {
-        DacFamily::Etherdream(EtherDreamConf { url }) if url == "192.168.1.68" => true,
+        DacFamily::Etherdream(EtherDreamConf { ip }) if ip == "192.168.1.68" => true,
         _ => false,
     });
 }