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diff --git a/simul/assets/inputs_moving.csv b/simul/assets/inputs_moving.csv
deleted file mode 100644
index f02d05c..0000000
--- a/simul/assets/inputs_moving.csv
+++ /dev/null
@@ -1,202 +0,0 @@
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diff --git a/simul/assets/inputs_still.csv b/simul/assets/inputs_still.csv
deleted file mode 100644
index 3df6c09..0000000
--- a/simul/assets/inputs_still.csv
+++ /dev/null
@@ -1,202 +0,0 @@
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diff --git a/simul/assets/probe.mtl b/simul/assets/probe.mtl
deleted file mode 100644
index 31c5ac7..0000000
--- a/simul/assets/probe.mtl
+++ /dev/null
@@ -1,12 +0,0 @@
-# Blender 5.1.0 MTL File: 'None'
-# www.blender.org
-
-newmtl Material
-Ns 250.000000
-Ka 1.000000 1.000000 1.000000
-Kd 0.800000 0.800000 0.800000
-Ks 0.500000 0.500000 0.500000
-Ke 0.000000 0.000000 0.000000
-Ni 1.500000
-d 1.000000
-illum 2
diff --git a/simul/assets/probe.obj b/simul/assets/probe.obj
deleted file mode 100644
index 46a6202..0000000
--- a/simul/assets/probe.obj
+++ /dev/null
@@ -1,400 +0,0 @@
-# Blender 5.1.0
-# www.blender.org
-mtllib probe.mtl
-o Cube
-v 1.000000 0.101130 -1.527883
-v 1.000000 -0.101130 -1.527883
-v 1.000000 0.101130 1.527883
-v 1.000000 -0.101130 1.527883
-v -1.000000 0.101130 -1.527883
-v -1.000000 -0.101130 -1.527883
-v -1.000000 0.101130 1.527883
-v -1.000000 -0.101130 1.527883
-v 0.008186 -0.628219 0.059172
-v 0.539580 -0.256799 0.412578
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diff --git a/simul/src/m3x3.rs b/simul/src/m3x3.rs
deleted file mode 100644
index d6150d3..0000000
--- a/simul/src/m3x3.rs
+++ /dev/null
@@ -1,86 +0,0 @@
-use std::ops::{Mul, MulAssign};
-
-use crate::v3::V3;
-
-#[derive(Clone, Copy, Debug)]
-pub struct M3x3([[f64; 3]; 3]);
-
-impl M3x3 {
-    pub fn init(v: f64) -> Self {
-        Self([[v; 3]; 3])
-    }
-    pub fn identity() -> Self {
-        Self([[1.0, 0.0, 0.0], [0.0, 1.0, 0.0], [0.0, 0.0, 1.0]])
-    }
-
-    pub fn new(v: [[f64; 3]; 3]) -> Self {
-        Self(v)
-    }
-
-    pub fn from_v3_rot(rot: V3) -> Self {
-        M3x3::new_rotate_x(rot.0) * M3x3::new_rotate_y(rot.1) * M3x3::new_rotate_z(rot.2)
-    }
-
-    #[rustfmt::skip]
-    pub fn new_rotate_x(angle: f64) -> Self {
-        Self([
-            [1.0,             0.0,              0.0],
-            [0.0, f64::cos(angle), -f64::sin(angle)],
-            [0.0, f64::sin(angle),  f64::cos(angle)],
-        ])
-    }
-
-    #[rustfmt::skip]
-    pub fn new_rotate_y(angle: f64) -> Self {
-        Self([
-            [ f64::cos(angle), 0.0, f64::sin(angle)],
-            [             0.0, 1.0,             0.0],
-            [-f64::sin(angle), 0.0, f64::cos(angle)],
-        ])
-    }
-
-    #[rustfmt::skip]
-    pub fn new_rotate_z(angle: f64) -> Self {
-        Self([
-            [f64::cos(angle), -f64::sin(angle), 0.0],
-            [f64::sin(angle),  f64::cos(angle), 0.0],
-            [            0.0,              0.0, 1.0],
-        ])
-    }
-}
-
-impl Mul for M3x3 {
-    type Output = M3x3;
-
-    fn mul(self, rhs: M3x3) -> Self::Output {
-        let mut output = M3x3([[0.0; 3]; 3]);
-        for i in 0..3 {
-            for j in 0..3 {
-                let v = &mut output.0[i][j];
-                for k in 0..3 {
-                    *v += self.0[i][k] * rhs.0[k][j];
-                }
-            }
-        }
-        output
-    }
-}
-
-impl Mul<V3> for M3x3 {
-    type Output = V3;
-
-    fn mul(self, rhs: V3) -> Self::Output {
-        let V3(x, y, z) = rhs;
-        let [[xx, xy, xz], [yx, yy, yz], [zx, zy, zz]] = self.0;
-        V3(
-            x * xx + y * xy + z * xz,
-            x * yx + y * yy + z * yz,
-            x * zx + y * zy + z * zz,
-        )
-    }
-}
-impl MulAssign for M3x3 {
-    fn mul_assign(&mut self, rhs: Self) {
-        *self = *self * rhs;
-    }
-}
diff --git a/simul/src/main.rs b/simul/src/main.rs
deleted file mode 100644
index 70e2cc7..0000000
--- a/simul/src/main.rs
+++ /dev/null
@@ -1,237 +0,0 @@
-#![allow(unused)]
-
-use obj::{Obj, load_obj};
-use serde::Deserialize;
-use std::{collections::HashMap, f64::consts::PI, fs::File, io::BufReader};
-
-use crate::{
-    m3x3::M3x3,
-    quats::RadianQuat,
-    scene::{Model, Scene},
-    tri2::Tri2,
-    tri3::Tri3,
-    v2::V2,
-    v3::V3,
-    window::{Color, Event, Keycode, Renderer, Window},
-};
-
-mod m3x3;
-mod quats;
-mod scene;
-mod tri2;
-mod tri3;
-mod v2;
-mod v3;
-mod window;
-
-struct AssetStore {
-    assets: HashMap<String, Obj>,
-}
-
-impl AssetStore {
-    fn new() -> Self {
-        Self {
-            assets: HashMap::new(),
-        }
-    }
-
-    fn load<S: Into<String>>(&mut self, path: S) -> Obj {
-        let path = path.into();
-        if self.assets.contains_key(&path) {
-            return self.assets.get(&path).unwrap().clone();
-        }
-        let asset: Obj = load_obj(BufReader::new(File::open(&path).unwrap())).unwrap();
-        self.assets.insert(path, asset.clone());
-        asset
-    }
-
-    fn get<S: Into<String>>(&self, path: S) -> Option<Obj> {
-        let path = path.into();
-        self.assets.get(&path).cloned()
-    }
-}
-
-pub struct App {
-    assets: AssetStore,
-    rot: V3,
-    motion_dev: MotionDevice,
-    dev_rot_rot: M3x3,
-    dev_accel_rot: M3x3,
-}
-
-impl App {
-    pub fn new(motion_dev: MotionDevice) -> Self {
-        Self {
-            assets: AssetStore::new(),
-            rot: V3::init(0.0),
-            motion_dev,
-            dev_rot_rot: M3x3::identity(),
-            dev_accel_rot: M3x3::identity(),
-        }
-    }
-}
-
-fn calculate_accel_axis_angle(axis: f64, tangent0: f64, tangent1: f64) -> f64 {
-    (axis / (tangent0 * tangent0 + tangent1 * tangent1).sqrt()).atan()
-}
-
-impl<R: Renderer> window::App<R> for App {
-    fn update(&mut self, delta_time: std::time::Duration) {
-        self.rot.0 += PI * 2.0 * delta_time.as_secs_f64() * 0.05;
-        // self.rot.2 += PI * 2.0 * delta_time.as_secs_f64() * 0.2;
-
-        self.motion_dev
-            .update(delta_time.as_micros() as i64, |m, dt| {
-                self.dev_rot_rot *= M3x3::new_rotate_x(m.rotation().0 * dt);
-                self.dev_rot_rot *= M3x3::new_rotate_y(m.rotation().1 * dt);
-                self.dev_rot_rot *= M3x3::new_rotate_z(m.rotation().2 * dt);
-
-                self.dev_accel_rot = M3x3::new_rotate_x(calculate_accel_axis_angle(
-                    m.accel().0,
-                    m.accel().1,
-                    m.accel().2,
-                ));
-                self.dev_accel_rot *= M3x3::new_rotate_y(calculate_accel_axis_angle(
-                    m.accel().1,
-                    m.accel().0,
-                    m.accel().2,
-                ));
-            });
-    }
-
-    fn render(&self, r: &mut R) {
-        let mut scene = Scene::new();
-
-        let mut cube = Model::new();
-        let cube_obj = self.assets.get("assets/cube.obj").unwrap();
-        cube.add_obj(&cube_obj, Color::RGB(165, 125, 165))
-            .rotate_by_m3x3(self.dev_rot_rot)
-            .scale(V3(0.4, 0.4, 0.4))
-            .translate(V3(0.0, 0.0, 1.0));
-        scene.draw_model(cube);
-
-        let probe_obj = self.assets.get("assets/probe.obj").unwrap();
-
-        let mut probe_rot = Model::new();
-        probe_rot
-            .add_obj(&probe_obj, Color::RGB(100, 160, 100))
-            .rotate_by_m3x3(M3x3::new_rotate_x(PI * 1.5))
-            .rotate_by_m3x3(M3x3::new_rotate_y(PI))
-            .rotate_by_m3x3(self.dev_rot_rot)
-            .scale(V3(0.15, 0.15, 0.15))
-            .translate(V3(1.5, -0.8, 1.0));
-        scene.draw_model(probe_rot);
-        let mut probe_accel = Model::new();
-        probe_accel
-            .add_obj(&probe_obj, Color::RGB(160, 100, 100))
-            .rotate_by_m3x3(M3x3::new_rotate_x(PI * 1.5))
-            .rotate_by_m3x3(M3x3::new_rotate_y(PI))
-            .rotate_by_m3x3(self.dev_accel_rot)
-            .scale(V3(0.15, 0.15, 0.15))
-            .translate(V3(1.0, -0.8, 1.0));
-        scene.draw_model(probe_accel);
-
-        scene.render(
-            r,
-            V3(0.0, 0.0, -1.0),
-            M3x3::from_v3_rot(V3(0.0, 0.0, 0.0)),
-            V3(0.0, 0.0, 0.0),
-        );
-
-        let mut draw_v3 = |name: &str, v: V3, pos: V2| {
-            r.draw_text(
-                format!("{}: [{: >7.2}, {: >7.2}, {: >7.2}]", name, v.0, v.1, v.2).as_str(),
-                pos + V2(0.002, -0.002),
-                Color::BLACK,
-            );
-            r.draw_text(
-                format!("{}: [{: >7.2}, {: >7.2}, {: >7.2}]", name, v.0, v.1, v.2).as_str(),
-                pos,
-                Color::WHITE,
-            );
-        };
-
-        let m = self.motion_dev.current();
-        draw_v3("acceleration", m.accel(), V2(-0.99, -0.5));
-        draw_v3("    rotation", m.rotation(), V2(-0.99, -0.53));
-    }
-
-    fn event(&mut self, event: Event) {}
-}
-
-#[derive(Debug, Deserialize)]
-pub struct Measurement {
-    time_delta_us: i64,
-    accel_x: f64,
-    accel_y: f64,
-    accel_z: f64,
-    rotation_x: f64,
-    rotation_y: f64,
-    rotation_z: f64,
-}
-
-impl Measurement {
-    pub fn accel(&self) -> V3 {
-        V3(self.accel_x, self.accel_y, self.accel_z)
-    }
-
-    pub fn rotation(&self) -> V3 {
-        V3(self.rotation_x, self.rotation_y, self.rotation_z)
-    }
-}
-
-pub struct MotionDevice {
-    measurements: Vec<Measurement>,
-    idx: usize,
-    timer_us: i64,
-}
-
-impl MotionDevice {
-    pub fn new(measurements: Vec<Measurement>) -> Self {
-        Self {
-            measurements,
-            idx: 0,
-            timer_us: 0,
-        }
-    }
-
-    pub fn update<F: FnMut(&Measurement, f64) -> ()>(&mut self, delta_time_us: i64, mut func: F) {
-        self.timer_us += delta_time_us;
-        while self.timer_us >= self.measurements[self.idx].time_delta_us {
-            func(
-                &self.measurements[self.idx],
-                self.measurements[self.idx].time_delta_us as f64 / 1_000_000.0,
-            );
-            self.timer_us -= self.measurements[self.idx].time_delta_us;
-            self.step();
-        }
-    }
-
-    fn step(&mut self) {
-        self.idx += 1;
-        if self.idx >= self.measurements.len() {
-            self.idx = 0;
-        }
-    }
-
-    pub fn current(&self) -> &Measurement {
-        &self.measurements[self.idx]
-    }
-}
-
-fn main() {
-    let mut reader = csv::Reader::from_path("assets/inputs_still.csv").unwrap();
-    let mut measurements = Vec::<Measurement>::new();
-    for entry in reader.deserialize::<Measurement>() {
-        let entry: Measurement = entry.unwrap();
-        measurements.push(entry);
-    }
-    let motion_dev = MotionDevice::new(measurements);
-
-    let mut window = Window::new();
-    let mut app = App::new(motion_dev);
-    app.assets.load("assets/cube.obj");
-    app.assets.load("assets/probe.obj");
-
-    window.run(&mut app);
-}
diff --git a/simul/src/quats.rs b/simul/src/quats.rs
deleted file mode 100644
index 4ddf968..0000000
--- a/simul/src/quats.rs
+++ /dev/null
@@ -1,54 +0,0 @@
-use crate::v3::V3;
-
-const I: V3 = V3(1.0, 0.0, 0.0);
-const J: V3 = V3(0.0, 1.0, 0.0);
-const K: V3 = V3(0.0, 0.0, 1.0);
-
-#[derive(Copy, Clone)]
-pub struct RadianQuat {
-    pub rad: f64,
-    pub u: V3,
-}
-
-#[derive(Copy, Clone)]
-pub struct Quat {
-    pub a: f64,
-    pub u: V3,
-}
-
-impl Quat {
-    fn len(&self) -> f64 {
-        (self.a.powi(2) + self.u.0.powi(2) + self.u.1.powi(2) + self.u.2.powi(2)).sqrt()
-    }
-    fn as_unit(&self) -> Quat {
-        let len = self.len();
-        Quat {
-            a: self.a / len,
-            u: self.u.map(|x| x / len),
-        }
-    }
-}
-
-impl RadianQuat {
-    pub fn as_quat(&self) -> Quat {
-        let RadianQuat { rad, u } = self.as_unit();
-        Quat {
-            a: rad.cos(),
-            u: u.map(|x| x * rad.sin()),
-        }
-    }
-    fn as_unit(&self) -> Self {
-        let len = self.u.0 + self.u.1 + self.u.2;
-        let u = self.u.map(|x| x / len);
-
-        RadianQuat { rad: self.rad, u }
-    }
-    pub fn as_inverse_quat(&self) -> Quat {
-        let RadianQuat { rad, u } = self.as_unit();
-        let u = u.map(|x| x * -1.0 * rad.sin());
-        Quat { a: -rad.cos(), u }
-    }
-    pub fn vector_quat(&self) -> V3 {
-        self.u
-    }
-}
diff --git a/simul/src/scene.rs b/simul/src/scene.rs
deleted file mode 100644
index 65dfa3c..0000000
--- a/simul/src/scene.rs
+++ /dev/null
@@ -1,171 +0,0 @@
-use std::f64::consts::PI;
-
-use obj::Obj;
-
-use crate::{
-    m3x3::M3x3,
-    quats::RadianQuat,
-    tri2::Tri2,
-    tri3::Tri3,
-    v3::V3,
-    window::{Color, Renderer},
-};
-
-pub struct Scene {
-    tris: Vec<(Tri3, V3, Color)>,
-}
-
-impl Scene {
-    pub fn new() -> Self {
-        Self { tris: Vec::new() }
-    }
-
-    pub fn render(
-        &self,
-        r: &mut impl Renderer,
-        camera_pos: V3,
-        camera_rot: M3x3,
-        screen_rel_pos: V3,
-    ) {
-        let mut indices_with_scores = self
-            .tris
-            .iter()
-            .enumerate()
-            .map(|(i, (tri, ..))| {
-                let mut score = (camera_pos - tri.middle()).len();
-                (i, score)
-            })
-            .rev()
-            .collect::<Vec<_>>();
-
-        indices_with_scores.sort_by(|a, b| b.1.total_cmp(&a.1));
-
-        for (i, _) in indices_with_scores {
-            let (tri3, normal, color) = &self.tris[i];
-
-            // if !(tri3.0.2 >= -1.0 && tri3.1.2 >= -1.0 && tri3.2.2 >= -1.0) {
-            //     continue;
-            // }
-
-            if normal.dot(camera_pos - tri3.0) < 0.0 {
-                continue;
-            }
-
-            let light = V3(1.0, 1.0, -1.0);
-
-            let exposure = 1.5 - normal.angle(light) / PI;
-
-            let (red, green, blue) = color.rgb();
-
-            let color = Color::RGB(
-                (red as f64 * exposure).clamp(0.0, 255.0) as _,
-                (green as f64 * exposure).clamp(0.0, 255.0) as _,
-                (blue as f64 * exposure).clamp(0.0, 255.0) as _,
-            );
-
-            let tri2 = tri3.project_2d(camera_pos, camera_rot, screen_rel_pos);
-
-            r.draw_triangles(&[tri2], color);
-            // r.draw_line(tri2.0, tri2.1, Color::BLACK);
-            // r.draw_line(tri2.1, tri2.2, Color::BLACK);
-            // r.draw_line(tri2.2, tri2.0, Color::BLACK);
-        }
-    }
-
-    pub fn draw_model(&mut self, model: Model) {
-        self.tris.extend(model.tris());
-    }
-
-    pub fn draw_triangle(&mut self, tri: Tri3, color: Color) {
-        self.tris.push((tri, tri.normal(), color));
-    }
-}
-
-pub struct Model {
-    tris: Vec<(Tri3, V3, Color)>,
-}
-
-impl Model {
-    pub fn new() -> Self {
-        Self { tris: Vec::new() }
-    }
-
-    pub fn tris(&self) -> impl Iterator<Item = (Tri3, V3, Color)> {
-        self.tris.iter().copied()
-    }
-
-    pub fn translate(&mut self, offset: V3) -> &mut Self {
-        for tri in &mut self.tris {
-            tri.0 = tri.0.translate(offset);
-        }
-        self
-    }
-
-    pub fn rotate_by_m3x3(&mut self, rot: M3x3) -> &mut Self {
-        for tri in &mut self.tris {
-            tri.0 = tri.0.rotate_by_m3x3(rot);
-            tri.1 = tri.1.rotate_by_m3x3(rot);
-        }
-        self
-    }
-
-    pub fn rotate_by_quat(&mut self, rot: RadianQuat) -> &mut Self {
-        for tri in &mut self.tris {
-            tri.0 = tri.0.rotate_by_quat(rot);
-            tri.1 = tri.1.rotate_by_quat(rot);
-        }
-        self
-    }
-
-    pub fn scale(&mut self, scale: V3) -> &mut Self {
-        for tri in &mut self.tris {
-            tri.0 = tri.0.scale(scale);
-        }
-        self
-    }
-
-    pub fn add_tri(&mut self, tri: Tri3, color: Color) -> &mut Self {
-        self.tris.push((tri, tri.normal(), color));
-        self
-    }
-
-    pub fn add_obj(&mut self, obj: &Obj, color: Color) -> &mut Self {
-        // if our triangle definition convention is [0, 1, 2]
-        // obj's is [2, 1, 0].
-        //
-        // likewise, if our coordinate system is [x, y, z],
-        // obj's is [x, z, y].
-
-        let count = obj.indices.len() / 3;
-        for i in 0..count {
-            let v2 = obj.vertices[obj.indices[i * 3] as usize];
-            let v1 = obj.vertices[obj.indices[i * 3 + 1] as usize];
-            let v0 = obj.vertices[obj.indices[i * 3 + 2] as usize];
-
-            let tri = Tri3(
-                V3(
-                    v0.position[0] as _,
-                    v0.position[2] as _,
-                    v0.position[1] as _,
-                ),
-                V3(
-                    v1.position[0] as _,
-                    v1.position[2] as _,
-                    v1.position[1] as _,
-                ),
-                V3(
-                    v2.position[0] as _,
-                    v2.position[2] as _,
-                    v2.position[1] as _,
-                ),
-            );
-
-            let normal = V3(v0.normal[0] as _, v0.normal[2] as _, v0.normal[1] as _)
-                + V3(v1.normal[0] as _, v1.normal[2] as _, v1.normal[1] as _)
-                + V3(v2.normal[0] as _, v2.normal[2] as _, v2.normal[1] as _);
-
-            self.tris.push((tri, normal, color));
-        }
-        self
-    }
-}
diff --git a/simul/src/tri2.rs b/simul/src/tri2.rs
deleted file mode 100644
index 2ae4925..0000000
--- a/simul/src/tri2.rs
+++ /dev/null
@@ -1,4 +0,0 @@
-use crate::v2::V2;
-
-#[derive(Clone, Copy, Debug)]
-pub struct Tri2(pub V2, pub V2, pub V2);
diff --git a/simul/src/tri3.rs b/simul/src/tri3.rs
deleted file mode 100644
index 0a88cf8..0000000
--- a/simul/src/tri3.rs
+++ /dev/null
@@ -1,60 +0,0 @@
-use crate::{m3x3::M3x3, quats::RadianQuat, tri2::Tri2, v3::V3};
-
-#[derive(Clone, Copy, Debug)]
-pub struct Tri3(pub V3, pub V3, pub V3);
-
-impl Tri3 {
-    pub fn init(v: V3) -> Self {
-        Self(v, v, v)
-    }
-
-    pub fn map<F: Fn(V3) -> V3>(&self, func: F) -> Self {
-        Self(func(self.0), func(self.1), func(self.2))
-    }
-
-    pub fn zip<F: Fn(V3, V3) -> V3>(&self, rhs: Tri3, func: F) -> Self {
-        Self(
-            func(self.0, rhs.0),
-            func(self.1, rhs.1),
-            func(self.2, rhs.2),
-        )
-    }
-
-    pub fn rotate_by_v3(&self, rot: V3) -> Self {
-        self.map(|v| v.rotate_by_v3(rot))
-    }
-    pub fn rotate_by_m3x3(&self, rot: M3x3) -> Self {
-        self.map(|v| v.rotate_by_m3x3(rot))
-    }
-    pub fn rotate_by_quat(&self, rot: RadianQuat) -> Self {
-        self.map(|v| v.rotate_by_quat(rot))
-    }
-
-    pub fn project_2d(&self, camera_pos: V3, camera_rot: M3x3, screen_rel_pos: V3) -> Tri2 {
-        Tri2(
-            self.0.project_2d(camera_pos, camera_rot, screen_rel_pos),
-            self.1.project_2d(camera_pos, camera_rot, screen_rel_pos),
-            self.2.project_2d(camera_pos, camera_rot, screen_rel_pos),
-        )
-    }
-
-    pub fn translate(&self, offset: V3) -> Self {
-        self.map(|v| v.translate(offset))
-    }
-
-    pub fn scale(&self, scale: V3) -> Self {
-        self.map(|v| v.scale(scale))
-    }
-
-    pub fn points(&self) -> [V3; 3] {
-        [self.0, self.1, self.2]
-    }
-
-    pub fn normal(&self) -> V3 {
-        (self.1 - self.0).cross(self.2 - self.1)
-    }
-
-    pub fn middle(&self) -> V3 {
-        (self.0 + self.1 + self.2).map(|v| v / 3.0)
-    }
-}
diff --git a/simul/src/v2.rs b/simul/src/v2.rs
deleted file mode 100644
index 916d0d8..0000000
--- a/simul/src/v2.rs
+++ /dev/null
@@ -1,84 +0,0 @@
-use std::ops::{Add, Div, Mul, Neg, Sub};
-
-#[derive(Clone, Copy, Debug)]
-pub struct V2(pub f64, pub f64);
-
-impl V2 {
-    pub fn init(v: f64) -> Self {
-        Self(v, v)
-    }
-
-    pub fn map<F: Fn(f64) -> f64>(&self, func: F) -> Self {
-        Self(func(self.0), func(self.1))
-    }
-
-    pub fn zip<F: Fn(f64, f64) -> f64>(&self, rhs: Self, func: F) -> Self {
-        Self(func(self.0, rhs.0), func(self.1, rhs.1))
-    }
-
-    pub fn iter(&self) -> impl Iterator<Item = f64> {
-        [self.0, self.1].into_iter()
-    }
-
-    pub fn reduce<F: Fn(f64, f64) -> f64>(&self, initial: f64, func: F) -> f64 {
-        let acc = initial;
-        let acc = func(acc, self.0);
-        func(acc, self.1)
-    }
-
-    pub fn normal(&self) -> V2 {
-        V2(-self.1, self.0)
-    }
-
-    pub fn translate(&self, trans: V2) -> V2 {
-        *self + trans
-    }
-
-    pub fn len(&self) -> f64 {
-        self.map(|v| v.powi(2)).reduce(0.0, |acc, v| acc + v)
-    }
-
-    pub fn unit(&self) -> V2 {
-        *self / self.len()
-    }
-}
-
-impl Add for V2 {
-    type Output = V2;
-
-    fn add(self, rhs: V2) -> Self::Output {
-        self.zip(rhs, |a, b| a + b)
-    }
-}
-
-impl Sub for V2 {
-    type Output = V2;
-
-    fn sub(self, rhs: V2) -> Self::Output {
-        self.zip(rhs, |a, b| a - b)
-    }
-}
-
-impl Mul<f64> for V2 {
-    type Output = V2;
-
-    fn mul(self, rhs: f64) -> Self::Output {
-        self.map(|v| v * rhs)
-    }
-}
-
-impl Div<f64> for V2 {
-    type Output = V2;
-
-    fn div(self, rhs: f64) -> Self::Output {
-        self.map(|v| v / rhs)
-    }
-}
-
-impl Neg for V2 {
-    type Output = V2;
-
-    fn neg(self) -> Self::Output {
-        V2::init(0.0) - self
-    }
-}
diff --git a/simul/src/v3.rs b/simul/src/v3.rs
deleted file mode 100644
index 4a93da7..0000000
--- a/simul/src/v3.rs
+++ /dev/null
@@ -1,141 +0,0 @@
-use crate::{
-    m3x3::M3x3,
-    quats::{Quat, RadianQuat},
-    v2::V2,
-};
-use std::ops::{Add, Div, Mul, Neg, Sub};
-
-#[derive(Clone, Copy, Debug)]
-pub struct V3(pub f64, pub f64, pub f64);
-
-impl V3 {
-    pub fn init(v: f64) -> Self {
-        Self(v, v, v)
-    }
-
-    pub fn map<F: Fn(f64) -> f64>(&self, func: F) -> Self {
-        Self(func(self.0), func(self.1), func(self.2))
-    }
-
-    pub fn zip<F: Fn(f64, f64) -> f64>(&self, rhs: V3, func: F) -> Self {
-        Self(
-            func(self.0, rhs.0),
-            func(self.1, rhs.1),
-            func(self.2, rhs.2),
-        )
-    }
-
-    pub fn iter(&self) -> impl Iterator<Item = f64> {
-        [self.0, self.1, self.2].into_iter()
-    }
-
-    pub fn reduce<F: Fn(f64, f64) -> f64>(&self, initial: f64, func: F) -> f64 {
-        let mut acc = initial;
-        for v in self.iter() {
-            acc = func(acc, v);
-        }
-        acc
-    }
-
-    pub fn cross(&self, rhs: V3) -> Self {
-        let V3(ax, ay, az) = self;
-        let V3(bx, by, bz) = rhs;
-        V3(ay * bz - az * by, az * bx - ax * bz, ax * by - ay * bx)
-    }
-
-    pub fn rotate_by_v3(&self, rot: V3) -> Self {
-        M3x3::new_rotate_z(rot.2)
-            * (M3x3::new_rotate_y(rot.1) * (M3x3::new_rotate_x(rot.0) * *self))
-    }
-
-    pub fn rotate_by_quat(&self, rot: RadianQuat) -> Self {
-        let u = rot.vector_quat();
-        let theta = rot.rad;
-        let q_real = theta.cos();
-        let q_vector = u * theta.sin();
-        let p = *self;
-
-        let r = p
-            + (u.cross(p)) * 2.0 * theta.cos() * theta.sin()
-            + (u * 2.0 * theta.sin().powi(2)).cross(u.cross(p));
-        r
-    }
-
-    pub fn rotate_by_m3x3(&self, rot: M3x3) -> Self {
-        rot * *self
-    }
-
-    /// See https://en.wikipedia.org/wiki/3D_projection#Mathematical_formula
-    /// for details on the implementation.
-    pub fn project_2d(&self, camera_pos: V3, camera_rot: M3x3, screen_rel_pos: V3) -> V2 {
-        let a = *self;
-        let c = camera_pos;
-        let d = (a - c).rotate_by_m3x3(camera_rot);
-        let e = screen_rel_pos - c;
-        V2(e.2 / d.2 * d.0 + e.0, e.2 / d.2 * d.1 + e.1)
-    }
-
-    pub fn angle(&self, rhs: Self) -> f64 {
-        (self.dot(rhs) / (self.len() * rhs.len())).acos()
-    }
-
-    pub fn dot(&self, rhs: Self) -> f64 {
-        self.zip(rhs, |a, b| a * b).reduce(0.0, |acc, v| acc + v)
-    }
-
-    pub fn translate(&self, offset: Self) -> Self {
-        *self + offset
-    }
-
-    pub fn scale(&self, scale: Self) -> Self {
-        self.zip(scale, |a, b| a * b)
-    }
-
-    pub fn len(&self) -> f64 {
-        self.map(|v| v.powi(2)).reduce(0.0, |acc, v| acc + v).sqrt()
-    }
-
-    pub fn unit(&self) -> V3 {
-        *self / self.len()
-    }
-}
-
-impl Add for V3 {
-    type Output = V3;
-
-    fn add(self, rhs: V3) -> Self::Output {
-        self.zip(rhs, |a, b| a + b)
-    }
-}
-
-impl Sub for V3 {
-    type Output = V3;
-
-    fn sub(self, rhs: V3) -> Self::Output {
-        self.zip(rhs, |a, b| a - b)
-    }
-}
-
-impl Mul<f64> for V3 {
-    type Output = V3;
-
-    fn mul(self, rhs: f64) -> Self::Output {
-        self.map(|v| v * rhs)
-    }
-}
-
-impl Div<f64> for V3 {
-    type Output = V3;
-
-    fn div(self, rhs: f64) -> Self::Output {
-        self.map(|v| v / rhs)
-    }
-}
-
-impl Neg for V3 {
-    type Output = V3;
-
-    fn neg(self) -> Self::Output {
-        V3::init(0.0) - self
-    }
-}
diff --git a/simul/src/window.rs b/simul/src/window.rs
deleted file mode 100644
index b4c17e1..0000000
--- a/simul/src/window.rs
+++ /dev/null
@@ -1,196 +0,0 @@
-use std::time::{Duration, Instant};
-
-use sdl3::{
-    Sdl,
-    event::Event as SdlEvent,
-    render::{Canvas, FPoint, FRect, TextureQuery, Vertex, VertexIndices},
-    ttf::Font,
-    video::Window as SdlWindow,
-};
-
-pub use sdl3::{keyboard::Keycode, pixels::Color};
-
-use crate::{tri2::Tri2, v2::V2};
-
-pub static WIDTH: f64 = 1920.0;
-pub static HEIGHT: f64 = 1080.0;
-
-pub trait App<R: Renderer> {
-    fn update(&mut self, delta_time: Duration);
-    fn render(&self, r: &mut R);
-    fn event(&mut self, event: Event);
-}
-
-pub trait Renderer {
-    fn draw_rect(&mut self, pos: V2, size: V2, color: Color);
-    fn draw_line(&mut self, from: V2, to: V2, color: Color);
-    fn draw_triangles(&mut self, tris: &[Tri2], color: Color);
-    fn draw_text(&mut self, text: &str, pos: V2, color: Color);
-}
-
-pub enum Event {
-    KeyDown(Keycode),
-    KeyUp(Keycode),
-}
-
-pub struct Window {
-    sdl_cx: Sdl,
-    canvas: Canvas<SdlWindow>,
-    font: Box<Font<'static>>,
-}
-
-impl Window {
-    pub fn new() -> Self {
-        let sdl_cx = sdl3::init().unwrap();
-        let ttf_cx = sdl3::ttf::init().unwrap();
-
-        let video_subsystem = sdl_cx.video().unwrap();
-        let window = video_subsystem
-            .window("Game", WIDTH as u32, HEIGHT as u32)
-            .position_centered()
-            .build()
-            .unwrap();
-        let mut canvas = window.into_canvas();
-
-        let font = Box::new(
-            ttf_cx
-                .load_font("/usr/share/fonts/TTF/FiraCode-Medium.ttf", 20.0)
-                .unwrap(),
-        );
-
-        canvas.set_draw_color(Color::BLACK);
-        canvas.clear();
-        canvas.present();
-
-        Self {
-            sdl_cx,
-            canvas,
-            font,
-        }
-    }
-
-    pub fn run(&mut self, app: &mut impl App<Self>) {
-        let mut event_pump = self.sdl_cx.event_pump().unwrap();
-
-        let mut time_before = Instant::now();
-        let time_per_frame = Duration::from_secs_f64(1.0 / 60.0);
-        let mut print_fps_timer = Instant::now();
-        let mut fps_count = 0;
-
-        'running: loop {
-            for event in event_pump.poll_iter() {
-                match event {
-                    SdlEvent::Quit { .. }
-                    | SdlEvent::KeyDown {
-                        keycode: Some(Keycode::Escape),
-                        ..
-                    } => break 'running,
-                    SdlEvent::KeyDown {
-                        keycode: Some(key), ..
-                    } => app.event(Event::KeyDown(key)),
-                    SdlEvent::KeyUp {
-                        keycode: Some(key), ..
-                    } => app.event(Event::KeyUp(key)),
-                    _ => {}
-                }
-            }
-
-            let time_now = Instant::now();
-            let delta_time = time_now - time_before;
-            time_before = time_now;
-            app.update(delta_time);
-
-            self.canvas.set_draw_color(Color::RGB(30, 30, 30));
-            self.canvas.clear();
-            app.render(self);
-            self.canvas.present();
-
-            fps_count += 1;
-            if (time_now - print_fps_timer).as_secs_f64() > 1.0 {
-                println!("fps: {fps_count}");
-                fps_count = 0;
-                print_fps_timer = time_now;
-            }
-            if delta_time < time_per_frame {
-                std::thread::sleep(time_per_frame - delta_time);
-            }
-        }
-    }
-
-    fn scale_w2s(&self, v: V2) -> V2 {
-        let factor = WIDTH / 2.0;
-        V2(v.0 * factor, v.1 * factor)
-    }
-    fn translate_w2s(&self, v: V2) -> V2 {
-        let aspect_ratio_h2w = HEIGHT / WIDTH;
-        let middle = V2(1.0, 1.0 * aspect_ratio_h2w);
-        V2(v.0 + middle.0, middle.1 - v.1)
-    }
-    fn point_w2s(&self, v: V2) -> V2 {
-        self.scale_w2s(self.translate_w2s(v))
-    }
-}
-
-impl Renderer for Window {
-    fn draw_rect(&mut self, pos: V2, size: V2, color: Color) {
-        let size = self.scale_w2s(size);
-        let pos = self.point_w2s(pos).translate(V2(0.0, -size.0));
-        self.canvas.set_draw_color(color);
-        self.canvas
-            .fill_rect(FRect::new(pos.0 as _, pos.1 as _, size.0 as _, size.1 as _))
-            .unwrap();
-    }
-    fn draw_line(&mut self, from: V2, to: V2, color: Color) {
-        self.canvas.set_draw_color(color);
-        self.canvas
-            .draw_line(self.point_w2s(from), self.point_w2s(to))
-            .unwrap();
-    }
-
-    fn draw_triangles(&mut self, tris: &[Tri2], color: Color) {
-        let vertices = tris
-            .iter()
-            .flat_map(|t| [t.0, t.1, t.2])
-            .map(|p| self.point_w2s(p))
-            .map(|p| Vertex {
-                position: p.into(),
-                color: color.into(),
-                tex_coord: FPoint::new(0.0, 0.0),
-            })
-            .collect::<Vec<_>>();
-
-        self.canvas
-            .render_geometry(&vertices, None, VertexIndices::Sequential)
-            .unwrap();
-    }
-
-    fn draw_text(&mut self, text: &str, pos: V2, color: Color) {
-        let texture_creator = self.canvas.texture_creator();
-
-        let surface = self.font.render(text).blended(color).unwrap();
-        let texture = texture_creator
-            .create_texture_from_surface(&surface)
-            .unwrap();
-
-        let TextureQuery { width, height, .. } = texture.query();
-
-        let pos = self.point_w2s(pos);
-
-        self.canvas.copy(
-            &texture,
-            None,
-            FRect {
-                x: pos.0 as _,
-                y: pos.1 as _,
-                w: width as _,
-                h: height as _,
-            },
-        );
-    }
-}
-
-impl From<V2> for FPoint {
-    fn from(value: V2) -> Self {
-        FPoint::new(value.0 as _, value.1 as _)
-    }
-}