diff --git a/src/boid.cc b/src/boid.cc
deleted file mode 100644
index 9eeea41..0000000
--- a/src/boid.cc
+++ /dev/null
@@ -1,108 +0,0 @@
-#include "main_window.hh"
-
-#include <QVector3D>
-#include <QRandomGenerator>
-
-
-struct Fish {
-	QVector3D pos;
-	QVector3D vel;
-	float size;
-	float dist = 10;
-	float sqdist;
-
-	OpenGLMesh mesh;
-
-	Fish(QVector3D pos, OpenGLMesh mesh)
-		:pos(pos),
-		 sqdist(dist * dist),
-		 mesh(mesh) {}
-
-	void step() {
-		pos += vel;
-		mesh.mat.setToIdentity();
-		QMatrix4x4 rot;
-		rot.lookAt(pos, vel, {0, 1, 0});
-		mesh.mat.translate(pos);
-		// mesh.mat = rot * mesh.mat;
-	}
-
-	bool in_neighborhood(const QVector3D &p) const {
-		return (p - pos).lengthSquared() < sqdist;
-	}
-};
-
-
-struct Banc {
-	QVector<Fish> fishes;
-
-	Banc() {}
-
-	Banc(size_t nfishes) {
-		OpenGLMesh fish_mesh = OpenGLMesh({
-				0, .1, 0,
-				-.0866, -.05, 0,
-				.0866, -.05, 0,
-			});
-		QRandomGenerator *rng = QRandomGenerator::global();
-		for (size_t i = 0; i < nfishes; i++) {
-			Fish fish({
-					(float) (rng->generateDouble() * 3 - 1.5),
-					(float) (rng->generateDouble() * 3 - 1.5),
-					(float) (rng->generateDouble() * 3 - 1.5)
-				}, fish_mesh);
-			fishes.append(fish);
-		}
-	}
-
-	void step() {
-		QVector<Fish> neighbors;
-		for (Fish &fish : fishes) {
-			QVector3D neighbors_cog;
-			QVector3D neighbors_vel;
-			size_t nneighbors = 0;
-			for (Fish &fish_b : fishes) {
-				if (fish_b.in_neighborhood(fish.pos)) {
-					nneighbors++;
-					neighbors_cog += fish_b.pos;
-					neighbors_vel += fish_b.vel;
-				}
-			}
-			neighbors_cog /= nneighbors;
-			neighbors_vel /= nneighbors;
-			QVector3D v1 = -(fish.pos - neighbors_cog);
-			QVector3D v2 = fish.vel - neighbors_vel;
-			QVector3D v3 = neighbors_cog - fish.pos;
-			QVector3D v = 1.5 * v1 + v2 + v3;
-			float L = .001;
-			fish.vel = (1-L) * fish.vel + L * v;
-			fish.step();
-		}
-	}
-};
-
-
-Banc banc;
-
-void MainWindow::init() {
-	banc = Banc(10);
-	for (Fish &fish : banc.fishes) {
-		glw.meshes.append(&fish.mesh);
-	}
-}
-
-
-void MainWindow::step() {
-	banc.step();
-	OpenGLWidget::instance->update();
-}
-
-
-void OpenGLWidget::paintGL() {
-	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-	for (const Fish &fish : banc.fishes) {
-		glUniformMatrix4fv(model_attr, 1, GL_FALSE, fish.mesh.mat.data());
-		glBindVertexArray(fish.mesh.vao);
-		glDrawArrays(GL_TRIANGLES, 0, fish.mesh.nverts);
-	}
-}