diff --git a/src/bin/render_lines_gui.rs b/src/bin/render_lines_gui.rs
index 8464df0..abdcaed 100644
--- a/src/bin/render_lines_gui.rs
+++ b/src/bin/render_lines_gui.rs
@@ -33,7 +33,7 @@ struct Model {
     egui: Egui,
     // socket for receiving points
     zmq: Socket,
-    current_points: LaserPoints, // a copy for the drawing renderer
+    current_lines: RenderableLines, // a copy for the drawing renderer
     last_update: Instant,
     // dimming_factor: f32,
 }
@@ -128,14 +128,14 @@ fn zmq_receive(model: &mut Model) {
     
     for laser_stream in (&model.laser_streams).into_iter() {
         // let lines = get_laser_lines(version);
-        let points: LaserPoints = (&lines).into();
+        let lines: RenderableLines = lines.clone();
         laser_stream.send(|laser|  {
-            let laser_points: LaserPoints = points;
-            laser.current_points = laser_points; 
+            let laser_lines: RenderableLines = lines;
+            laser.current_lines = laser_lines; 
         }).unwrap();
     }
 
-    model.current_points = (&lines).into();
+    model.current_lines = lines;
     model.last_update = Instant::now();
     
 }
@@ -217,7 +217,7 @@ fn model(app: &App) -> Model {
     // egui.ctx().set_fonts(fonts());
     egui.ctx().set_style(style());
 
-    let current_points = Vec::new();
+    let current_lines = RenderableLines::new(); //Vec::new();
 
     Model {
         laser_api,
@@ -227,7 +227,7 @@ fn model(app: &App) -> Model {
         dac_rx,
         egui,
         zmq,
-        current_points,
+        current_lines: current_lines,
         last_update: Instant::now(),
         // dimming_factor: 1.,
     }
@@ -252,7 +252,7 @@ const LASER_H: Mat3 = python_cv_h_into_mat3(TMP_PYTHON_LASER_H);
 
 fn laser_frame_producer(model: &mut LaserModel, frame: &mut laser::Frame){
     
-    let points = model.current_points.clone();
+    let points: LaserPoints = (&model.current_lines).into();
     let pointno = points.len();
 
     let mut new_points = Vec::new();
@@ -374,7 +374,7 @@ fn update(_app: &App, model: &mut Model, update: Update) {
 
         ui.separator();
 
-        ui.add(egui::Label::new(format!("Laser {}", model.current_points.len())));
+        ui.add(egui::Label::new(format!("Lines {}", model.current_lines.lines.len())));
 
         ui.heading("Laser Settings");
 
@@ -513,7 +513,10 @@ fn view_line_canvas(app: &App, model: &Model, frame: Frame) {
     let thickness = 2.0;
     // let hz = ((app.mouse.x + win.right()) / win.w()).powi(4) * 1000.0;
 
-    let vertices = model.current_points.iter().map(|p| {
+    // TODO draw distinct lines, using euclid for scale
+    let points: LaserPoints = (&model.current_lines).into();
+
+    let vertices = points.iter().map(|p| {
         let color = srgba(p.color[0], p.color[1], p.color[2], 1.0);
         
         let pos = [p.position[0] * scale, p.position[1] * -scale];
diff --git a/src/bin/render_tracks.rs b/src/bin/render_tracks.rs
index 72eb70c..598e334 100644
--- a/src/bin/render_tracks.rs
+++ b/src/bin/render_tracks.rs
@@ -133,7 +133,7 @@ fn laser_frame_producer(model: &mut LaserModel, frame: &mut laser::Frame){
     //     false => trap::shapes::ARE_YOU_SURE,
     // };
     
-    let points = model.current_points.clone();
+    let points = model.current_lines.clone();
 
     let mut new_points = Vec::new();
     for point in points.into_iter() {
diff --git a/src/trap/laser.rs b/src/trap/laser.rs
index 7cd2eb6..f851308 100644
--- a/src/trap/laser.rs
+++ b/src/trap/laser.rs
@@ -2,7 +2,7 @@ use bevy::prelude::*;
 use nannou_laser as laser;
 use std::time::Instant;
 
-use super::tracks::LaserPoints;
+use super::tracks::{LaserPoints, RenderableLines};
 
 pub const TMP_PYTHON_LASER_H: [[f32;3];3] = [[ 2.47442963e+02, -7.01714050e+01, -9.71749119e+01],
 [ 1.02328119e+01,  1.47185254e+02,  1.96295638e+02],
@@ -32,7 +32,7 @@ pub fn apply_homography_matrix(h: Mat3, p: &[f32; 2]) -> [f32; 2]{
 #[derive(Resource, Clone)]
 pub struct LaserModel{
     pub t: Instant, // register start time, so that animations can be moving
-    pub current_points: LaserPoints,
+    pub current_lines: RenderableLines,
     pub dimming: f32,
 }
 
@@ -40,7 +40,7 @@ impl LaserModel{
     pub fn new() -> Self{
         Self{
             t: Instant::now(),
-            current_points: Vec::new(),
+            current_lines: RenderableLines::new(),
             dimming: 0.3
         }
     }
diff --git a/src/trap/tracks.rs b/src/trap/tracks.rs
index b209424..58215cc 100644
--- a/src/trap/tracks.rs
+++ b/src/trap/tracks.rs
@@ -40,6 +40,7 @@ pub struct Track {
 }
 
 // coordinates in world space. To be converted to laser::Point or a drawable point
+// TODO migrate to euclid::Point2D<f32, WorldSpace>
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct RenderablePoint{
     pub position: Vec2,
@@ -97,6 +98,7 @@ impl From<&Track> for RenderableLines{
     }
 }
 
+// TODO migrate to euclid::Point2D<f32, LaserSpace>
 pub type LaserPoints = Vec<laser::Point>;
 
 impl From<&RenderableLines> for LaserPoints {
diff --git a/src/trap/zmqplugin.rs b/src/trap/zmqplugin.rs
index ab3a88c..adfa4b1 100644
--- a/src/trap/zmqplugin.rs
+++ b/src/trap/zmqplugin.rs
@@ -77,10 +77,10 @@ fn receive_zmq_lines(
         for (laser_api, mut laser_timer) in lasers.iter_mut() {
             laser_timer.timer.tick(time.delta());
             // let lines = get_laser_lines(version);
-            let points: LaserPoints = (&lines).into();
+            let lines: RenderableLines = lines.clone();
             laser_api.laser_stream.send(|laser|  {
-                let laser_points: LaserPoints = points;
-                laser.current_points = laser_points; 
+                let laser_lines: RenderableLines = lines;
+                laser.current_lines = laser_lines; 
             }).unwrap();
         }
     }