diff --git a/src/graphics/camera.cpp b/src/graphics/camera.cpp
index 2c4f94d..93f8aec 100644
--- a/src/graphics/camera.cpp
+++ b/src/graphics/camera.cpp
@@ -4,7 +4,7 @@
 
 #include "camera.hpp"
 #include "input/keyboard.hpp"
-#include "../math.hpp"
+#include "../util/math.hpp"
 
 #include <cmath>
 #include <iostream>
@@ -75,7 +75,11 @@ void camera::update(const system& sys, double dt)
 		velocity.z += 3.5;
 	}
 
-	glm::vec<3, double> velocity2 = sys.scene.check_intersect(pos, velocity * dt) / dt;
+	glm::vec<3, double> normal_last(0);
+	glm::vec<3, double> velocity2;
+   
+	velocity2 = sys.scene.calc_intersect(pos, velocity * dt, normal_last);
+	velocity2 = sys.scene.calc_intersect(pos + glm::vec<3, double>(0, 0, -1.5), velocity2, normal_last) / dt;
 
 	pos += velocity2 * dt;
 	on_ground = ((velocity * dt / dt).z != velocity2.z);
diff --git a/src/graphics/mesh/font.cpp b/src/graphics/mesh/font.cpp
index 846e68d..0db843a 100644
--- a/src/graphics/mesh/font.cpp
+++ b/src/graphics/mesh/font.cpp
@@ -89,6 +89,8 @@ void font::init()
 
 		chars[i] = c;
 	}
+
+	FT_Done_FreeType(ft);
 }
 
 void mesh::load_text(const char* text, double size)
diff --git a/src/graphics/mesh/glmesh.cpp b/src/graphics/mesh/glmesh.cpp
index 9e9b47e..ea8e82a 100644
--- a/src/graphics/mesh/glmesh.cpp
+++ b/src/graphics/mesh/glmesh.cpp
@@ -73,6 +73,11 @@ void glmesh::set(const mesh& m, int mode)
 
 void glmesh::render()
 {
-	glDrawElements(GL_TRIANGLES, size, GL_UNSIGNED_INT, 0);
+	render(GL_TRIANGLES);
+}
+
+void glmesh::render(int type)
+{
+	glDrawElements(type, size, GL_UNSIGNED_INT, 0);
 }
 
diff --git a/src/graphics/mesh/glmesh.hpp b/src/graphics/mesh/glmesh.hpp
index ff04e6d..b8a2223 100644
--- a/src/graphics/mesh/glmesh.hpp
+++ b/src/graphics/mesh/glmesh.hpp
@@ -27,6 +27,7 @@ struct glmesh
 	void bind();
 	void uniform();
 	void set(const mesh& m, int mode);
+	void render(int type);
 	void render();
 };
 
diff --git a/src/graphics/mesh/mesh.cpp b/src/graphics/mesh/mesh.cpp
index 93a01ca..7f60a12 100644
--- a/src/graphics/mesh/mesh.cpp
+++ b/src/graphics/mesh/mesh.cpp
@@ -3,7 +3,7 @@
 #include "arrays.hpp"
 #include "../shader.hpp"
 #include "../camera.hpp"
-#include "../../math.hpp"
+#include "../../util/math.hpp"
 
 #include <iostream>
 
@@ -95,19 +95,18 @@ bool ray_intersects_triangle(vec3 ray_origin,
         return false;
 }
 
-vec3 mesh::check_intersect(vec3 pos, vec3 path) const
+bool mesh::check_intersect(vec3 pos, vec3 path) const
 {
 	double l = glm::length(path);
 
 	if(l == 0)
 	{
-		return path;
+		return false;
 	}
 
 	vec3 path_n = path / l;
-	bool intersects = false;
-
-	for(unsigned int i = 0; i < indices.size(); i += 3)
+	
+	for(unsigned int i = 0; i < indices.size(); i++)
 	{
 		vec3 v[3] = {
 			vec3(this->vertices[indices[i]].pos),
@@ -117,7 +116,7 @@ vec3 mesh::check_intersect(vec3 pos, vec3 path) const
 		
 		vec3 ipoint;
 		vec3 normal = glm::normalize(glm::cross(v[1] - v[0], v[2] - v[0]));
-		double d = glm::dot(normal, path);
+		double d = glm::dot(normal, path_n);
 
 		if(d >= 0)
 			continue;
@@ -126,12 +125,107 @@ vec3 mesh::check_intersect(vec3 pos, vec3 path) const
 		if(l < glm::length(ipoint - pos))
 			continue;
 
-		intersects = true;
-		path -= normal * d;
-		l = glm::length(path);
-		path_n = path / l;
+		return true;
 	}
 
+	return false;
+}
+
+vec3 mesh::calc_intersect(vec3 pos, vec3 path) const
+{
+	vec3 normal_last(0);
+	return calc_intersect(pos, path, normal_last);
+}
+
+static bool calc_intercept_vert(vec3 v[3], vec3 pos, vec3& path, vec3& path_n, vec3& normal_last, double& l)
+{
+	vec3 ipoint;
+	vec3 normal = glm::normalize(glm::cross(v[1] - v[0], v[2] - v[0]));
+	double d = glm::dot(normal, path);
+
+	if(d >= 0)
+		return false;
+	if(!ray_intersects_triangle(pos, path_n, v, ipoint))
+		return false;
+	if(l < glm::length(ipoint - pos))
+		return false;
+
+	if(normal_last != vec3(0))
+	{
+		vec3 n = glm::cross(normal_last, normal);
+
+		if(glm::length(n) > 0)
+		{
+			normal = glm::normalize(glm::cross(glm::cross(normal_last, normal), normal_last));
+			d = glm::dot(normal, path);
+		}
+	}
+	
+	path -= normal * d;
+	normal_last = normal;
+	l = glm::length(path);
+	path_n = path / l;
+
+	return true;
+}
+
+vec3 mesh::calc_intersect(vec3 pos, vec3 path, vec3& normal_last) const
+{
+	double l = glm::length(path);
+
+	if(l == 0)
+	{
+		return path;
+	}
+
+	vec3 path_n = path / l;
+	unsigned int i_found = 0;
+
+	for(unsigned int i = 0; i < indices.size(); i += 3)
+	{
+		vec3 v[3] = {
+			vec3(this->vertices[indices[i]].pos),
+			vec3(this->vertices[indices[i + 1]].pos),
+			vec3(this->vertices[indices[i + 2]].pos)
+		};
+		
+		if(calc_intercept_vert(v, pos, path, path_n, normal_last, l))
+		{
+			i_found = i;
+		}
+	}
+/*
+	for(unsigned int i = i_found - 1; i >= 0; i--)
+	{
+		vec3 v[3] = {
+			vec3(this->vertices[indices[i]].pos),
+			vec3(this->vertices[indices[i + 1]].pos),
+			vec3(this->vertices[indices[i + 2]].pos)
+		};
+		
+		calc_intercept_vert(v, pos, path, path_n, normal_last, l);
+	}
+*/
 	return path;
 }
 
+mesh mesh::to_lines() const
+{
+	mesh m;
+	m.vertices = vertices;
+
+	for(int i = 0; i < indices.size(); i += 3)
+	{
+		m.indices.push_back(indices[i]);
+		m.indices.push_back(indices[i + 1]);
+		m.indices.push_back(indices[i + 1]);
+		m.indices.push_back(indices[i + 2]);
+		m.indices.push_back(indices[i]);
+		m.indices.push_back(indices[i + 2]);
+	}
+
+	std::cout << "indices.size() = " << m.indices.size() << ", vertices.size() = " << m.vertices.size() << "\n";
+
+	return m;
+}
+
diff --git a/src/graphics/mesh/mesh.hpp b/src/graphics/mesh/mesh.hpp
index 115d23e..7c54f5b 100644
--- a/src/graphics/mesh/mesh.hpp
+++ b/src/graphics/mesh/mesh.hpp
@@ -27,7 +27,10 @@ struct mesh
 	void load_text(const char* text, double size);
 	void add(const mesh& o, glm::mat4 mat);
 
-	glm::vec<3, double> check_intersect(glm::vec<3, double> pos, glm::vec<3, double> path) const;
+	mesh to_lines() const;
+	bool check_intersect(glm::vec<3, double> pos, glm::vec<3, double> path) const;
+	glm::vec<3, double> calc_intersect(glm::vec<3, double> pos, glm::vec<3, double> path) const;
+	glm::vec<3, double> calc_intersect(glm::vec<3, double> pos, glm::vec<3, double> path, glm::vec<3, double>& normal_last) const;
 
 	template <class T>
 	void load_text(const char* header, T& item, double size)
diff --git a/src/graphics/window.cpp b/src/graphics/window.cpp
index b09996a..15f0cfc 100644
--- a/src/graphics/window.cpp
+++ b/src/graphics/window.cpp
@@ -28,7 +28,7 @@ using namespace sim::graphics;
 static GLFWwindow* win;
 static bool win_should_close = false;
 
-static glmesh MeshScene;
+static glmesh MeshScene, MeshCollisionScene;
 static monitor::vessel MonitorVessel;
 static monitor::core MonitorCore;
 
@@ -40,7 +40,7 @@ void GLAPIENTRY cb_debug_message(GLenum source, GLenum type, GLuint id, GLenum s
 	}
 }
 
-void window::create()
+void window::create(system& sys)
 {
 	glfwInit();
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
@@ -96,11 +96,14 @@ void window::create()
 	font::init();
 
 	shader::init_program();
-	mesh rmesh;
 
-	rmesh.load_model("../assets", "scene-baked.glb");
+	sys.scene.load_model("../assets", "scene-baked.glb");
 	MeshScene.bind();
-	MeshScene.set(rmesh, GL_STATIC_DRAW);
+	MeshScene.set(sys.scene, GL_STATIC_DRAW);
+
+	sys.scene.load_model("../assets/model", "scene_collisions.stl");
+	MeshCollisionScene.bind();
+	MeshCollisionScene.set(sys.scene.to_lines(), GL_STATIC_DRAW);
 
 	MonitorCore.init();
 	MonitorVessel.init();
@@ -123,6 +126,10 @@ void window::loop(sim::system& sys)
 	MeshScene.uniform();
 	MeshScene.render();
 
+	MeshCollisionScene.bind();
+	MeshCollisionScene.uniform();
+	MeshCollisionScene.render(GL_LINES);
+
 	MonitorCore.render(sys);
 	MonitorVessel.render();
 
diff --git a/src/graphics/window.hpp b/src/graphics/window.hpp
index 52e2368..f9222d8 100644
--- a/src/graphics/window.hpp
+++ b/src/graphics/window.hpp
@@ -8,8 +8,8 @@
 namespace sim::graphics::window
 {
 
-void create();
 bool should_close();
+void create(sim::system& sys);
 void loop(sim::system& sys);
 void destroy();
 void close();
diff --git a/src/main.cpp b/src/main.cpp
index 68f7277..d7f2a2d 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -28,8 +28,8 @@ unsigned long get_now()
 
 int main()
 {
-	graphics::window::create();
 	sim::system sys;
+	graphics::window::create(sys);
 
 	long clock = get_now();
 
diff --git a/src/reactor/builder.cpp b/src/reactor/builder.cpp
index 53495b4..87ad129 100644
--- a/src/reactor/builder.cpp
+++ b/src/reactor/builder.cpp
@@ -3,6 +3,7 @@
 
 #include <cmath>
 #include <vector>
+#include <cstdlib>
 
 using namespace sim::reactor;
 
@@ -14,31 +15,31 @@ sim::reactor::reactor sim::reactor::builder(const int W, const int H, const doub
 	for(int x = 0; x < W; x++)
 	{
 		char c = lines[y][x];
-		rod* r;
+		std::unique_ptr<rod> r;
 
 		switch(c)
 		{
 		case 'F':
-			r = new fuel::fuel_rod(fr);
+			r = fr.clone();
 			break;
 		case 'C':
-			r = new control::boron_rod(br);
+			r = br.clone();
 			break;
 		case 'G':
-			r = new control::graphite_rod();
+			r = std::make_unique<control::graphite_rod>();
 			break;
 		case 'H':
-			r = new coolant::heater();
+			r = std::make_unique<coolant::heater>();
 			break;
 		case 'P':
-			r = new coolant::pipe(v);
+			r = std::make_unique<coolant::pipe>(v);
 			break;
 		case ' ':
-			r = new rod();
+			r = std::make_unique<rod>();
 			break;
 		}
 
-		arr[y * W + x] = std::unique_ptr<rod>(std::move(r));
+		arr[y * W + x] = std::move(r);
 	}
 
 	return reactor(&arr[0], W, H, CW, CH);
diff --git a/src/reactor/control/boron_rod.hpp b/src/reactor/control/boron_rod.hpp
index a5b59bf..f7347c2 100644
--- a/src/reactor/control/boron_rod.hpp
+++ b/src/reactor/control/boron_rod.hpp
@@ -15,7 +15,6 @@ class boron_rod : public sim::reactor::coolant::pipe
 	
 	virtual void display(std::ostream& o) const;
 	virtual const char* get_name() const { return "Boron Control Rod"; }
-	virtual rod* clone() const { return new boron_rod(*this); }
 	virtual glm::vec4 get_colour() const;
 	virtual int get_id() const { return 5; }
 
@@ -30,6 +29,7 @@ public:
 	virtual bool should_display() const { return true; }
 	virtual bool should_select() const { return true; }
 	virtual void update_selected(double a);
+	virtual std::unique_ptr<rod> clone() const { return std::make_unique<boron_rod>(*this); }
 };
 
 }
diff --git a/src/reactor/control/graphite_rod.hpp b/src/reactor/control/graphite_rod.hpp
index a77b63e..f5b8316 100644
--- a/src/reactor/control/graphite_rod.hpp
+++ b/src/reactor/control/graphite_rod.hpp
@@ -12,7 +12,6 @@ class graphite_rod : public sim::reactor::rod
 	
 	virtual void display(std::ostream& o) const;
 	virtual const char* get_name() const { return "Graphite Rod"; }
-	virtual rod* clone() const { return new graphite_rod(*this); };
 	virtual double get_k(val_t type) const;
 	virtual glm::vec4 get_colour() const;
 	virtual int get_id() const { return 4; }
@@ -27,6 +26,7 @@ public:
 	virtual bool should_display() const { return true; }
 	virtual bool should_select() const { return true; }
 	virtual void update_selected(double a);
+	virtual std::unique_ptr<rod> clone() const { return std::make_unique<graphite_rod>(*this); }
 };
 
 }
diff --git a/src/reactor/coolant/heater.hpp b/src/reactor/coolant/heater.hpp
index c906335..75958f0 100644
--- a/src/reactor/coolant/heater.hpp
+++ b/src/reactor/coolant/heater.hpp
@@ -15,7 +15,6 @@ class heater : public sim::reactor::rod
 	virtual bool has_sensors(val_t t) const { return true; }
 	virtual const char* get_name() const { return "Heater"; }
 	virtual double get_k(val_t type) const { return 0.5; }
-	virtual rod* clone() const { return new heater(*this); };
 	virtual int get_id() const { return 3; }
 
 public:
@@ -24,6 +23,7 @@ public:
 	virtual bool should_display() const { return true; }
 	virtual bool should_select() const { return true; }
 	virtual void update_selected(double a);
+	virtual std::unique_ptr<rod> clone() const { return std::make_unique<heater>(*this); }
 };
 
 };
diff --git a/src/reactor/coolant/pipe.hpp b/src/reactor/coolant/pipe.hpp
index 46deb5f..71cd9c1 100644
--- a/src/reactor/coolant/pipe.hpp
+++ b/src/reactor/coolant/pipe.hpp
@@ -16,7 +16,6 @@ protected:
 	
 	virtual double get_k(sim::reactor::rod::val_t type) const;
 	virtual const char* get_name() const { return "Coolant"; }
-	virtual rod* clone() const { return new pipe(*this); };
 	virtual int get_id() const { return 2; }
 
 	void update_pipe(double secs);
@@ -25,6 +24,7 @@ public:
 
 	pipe(coolant::vessel& v);
 
+	virtual std::unique_ptr<rod> clone() const { return std::make_unique<pipe>(*this); }
 	virtual bool should_display() const { return true; }
 	virtual void update(double secs);
 
diff --git a/src/reactor/fuel/fuel_rod.hpp b/src/reactor/fuel/fuel_rod.hpp
index 1e1b12d..e2eebb1 100644
--- a/src/reactor/fuel/fuel_rod.hpp
+++ b/src/reactor/fuel/fuel_rod.hpp
@@ -16,7 +16,6 @@ class fuel_rod : public sim::reactor::rod
 	
 	virtual bool has_sensors(val_t t) const { return true; }
 	virtual const char* get_name() const { return "Fuel"; }
-	virtual rod* clone() const { return new fuel_rod(*this); };
 	virtual int get_id() const { return 1; }
 	virtual glm::vec4 get_colour() const;
 	
@@ -24,6 +23,7 @@ public:
 
 	fuel_rod(double fuel);
 	
+	virtual std::unique_ptr<rod> clone() const { return std::make_unique<fuel_rod>(*this); }
 	virtual bool should_display() const { return true; }
 	virtual void update(double secs);
 };
diff --git a/src/reactor/reactor.cpp b/src/reactor/reactor.cpp
index 73b2a22..71c0a39 100644
--- a/src/reactor/reactor.cpp
+++ b/src/reactor/reactor.cpp
@@ -8,7 +8,7 @@ using namespace sim::reactor;
 
 reactor::reactor(std::unique_ptr<rod>* rods, int w, int h, double cw, double ch) : cell_width(cw), cell_height(ch), width(w), height(h), size(w * h)
 {
-	this->rods = new std::unique_ptr<rod>[width * height];
+	this->rods = std::make_unique<std::unique_ptr<rod>[]>(width * height);
 
 	for(int i = 0; i < size; i++)
 	{
@@ -19,14 +19,13 @@ reactor::reactor(std::unique_ptr<rod>* rods, int w, int h, double cw, double ch)
 
 reactor::reactor(reactor&& o) : cell_width(o.cell_width), cell_height(o.cell_height), width(o.width), height(o.height), size(o.size)
 {
-	rods = o.rods;
+	rods = std::move(o.rods);
 	cursor = o.cursor;
-	o.rods = nullptr;
 }
 
 reactor::reactor(const reactor& o) : cell_width(o.cell_width), cell_height(o.cell_height), width(o.width), height(o.height), size(o.size)
 {
-	rods = new std::unique_ptr<rod>[width * height];
+	this->rods = std::make_unique<std::unique_ptr<rod>[]>(width * height);
 
 	for(int i = 0; i < size; i++)
 	{
@@ -34,14 +33,6 @@ reactor::reactor(const reactor& o) : cell_width(o.cell_width), cell_height(o.cel
 	}
 }
 
-reactor::~reactor()
-{
-	if(rods != nullptr)
-	{
-		delete[] rods;
-	}
-}
-
 void reactor::update(double secs)
 {
 	int rods_lookup[size];
diff --git a/src/reactor/reactor.hpp b/src/reactor/reactor.hpp
index 55e7e38..7fed016 100644
--- a/src/reactor/reactor.hpp
+++ b/src/reactor/reactor.hpp
@@ -18,13 +18,12 @@ struct reactor
 	const int height;
 	const int size;
 
-	std::unique_ptr<rod>* rods;
+	std::unique_ptr<std::unique_ptr<rod>[]> rods;
 	int cursor = 0;
 
 	reactor(std::unique_ptr<rod>* rods, int width, int height, double cell_width, double cell_height);
 	reactor(const reactor& r);
 	reactor(reactor&& r);
-	~reactor();
 	
 	void update(double secs);
 	void update_selected(int v);
diff --git a/src/reactor/rod.hpp b/src/reactor/rod.hpp
index 755e896..284da37 100644
--- a/src/reactor/rod.hpp
+++ b/src/reactor/rod.hpp
@@ -3,6 +3,7 @@
 
 #include <ostream>
 #include <glm/vec4.hpp>
+#include <memory>
 
 namespace sim::reactor
 {
@@ -21,12 +22,13 @@ public:
 		N_FAST = 2
 	};
 
+	virtual ~rod() {};
 	virtual void interact(rod* o, double secs);
 	virtual void update(double secs) { }
 	virtual void add(val_t type, double v);
 	virtual double extract(val_t type, double s, double k, double o);
 	virtual double get(val_t type) const;
-	virtual rod* clone() const { return new rod(*this); }
+	virtual std::unique_ptr<rod> clone() const { return std::make_unique<rod>(*this); }
 	virtual glm::vec4 get_colour() const { return {0, 0, 0, 0}; }
 	virtual int get_id() const { return 0; }
 
diff --git a/src/system.cpp b/src/system.cpp
index 7785f24..64b5797 100644
--- a/src/system.cpp
+++ b/src/system.cpp
@@ -33,37 +33,22 @@ system::system()
 		"      C C C C      "
 	};
 	
-	vessel = new reactor::coolant::vessel(8, 10, 300, sim::coolant::WATER);
-	reactor = new sim::reactor::reactor(sim::reactor::builder(19, 19, 0.25, 8,
+	vessel = std::make_unique<reactor::coolant::vessel>(8, 10, 300, sim::coolant::WATER);
+	reactor = std::make_unique<sim::reactor::reactor>(sim::reactor::builder(19, 19, 0.25, 8,
 		reactor::fuel::fuel_rod(0.5),
-		reactor::control::boron_rod(*vessel, 1),
-		*vessel, layout));
+		reactor::control::boron_rod(*vessel.get(), 1),
+		*vessel.get(), layout));
 	
-	valve = new coolant::valve<reactor::coolant::vessel>(*vessel, 1, 500);
-	pump = new coolant::pump<reactor::coolant::vessel>(*vessel, 1e4, 15);
-
-	scene.load_model("../assets/model", "scene_collisions.stl");
+	valve = std::make_unique<coolant::valve<reactor::coolant::vessel>>(*vessel.get(), 1, 500);
+	pump = std::make_unique<coolant::pump<reactor::coolant::vessel>>(*vessel.get(), 1e4, 15);
 }
 
 system::system(system&& o)
 {
-	vessel = o.vessel;
-	reactor = o.reactor;
-	valve = o.valve;
-	pump = o.pump;
-
-	o.vessel = nullptr;
-	o.reactor = nullptr;
-	o.valve = nullptr;
-	o.pump = nullptr;
-}
-
-system::~system()
-{
-	if(vessel != nullptr) delete vessel;
-	if(reactor != nullptr) delete reactor;
-	if(valve != nullptr) delete valve;
-	if(pump != nullptr) delete pump;
+	vessel = std::move(o.vessel);
+	reactor = std::move(o.reactor);
+	valve = std::move(o.valve);
+	pump = std::move(o.pump);
 }
 
 void system::update(double dt)
diff --git a/src/system.hpp b/src/system.hpp
index 36b0f4a..148ea54 100644
--- a/src/system.hpp
+++ b/src/system.hpp
@@ -14,16 +14,15 @@ namespace sim
 
 struct system
 {
-	sim::reactor::reactor* reactor;
-	sim::reactor::coolant::vessel* vessel;
-	sim::coolant::valve<sim::reactor::coolant::vessel>* valve;
-	sim::coolant::pump<sim::reactor::coolant::vessel>* pump;
+	std::unique_ptr<sim::reactor::reactor> reactor;
+	std::unique_ptr<sim::reactor::coolant::vessel> vessel;
+	std::unique_ptr<sim::coolant::valve<sim::reactor::coolant::vessel>> valve;
+	std::unique_ptr<sim::coolant::pump<sim::reactor::coolant::vessel>> pump;
 	sim::graphics::mesh scene;
 
 	system();
 	system(system&& o);
 	system(const system& o) = delete;
-	~system();
 
 	void update(double dt);
 };
diff --git a/src/math.hpp b/src/util/math.hpp
similarity index 100%
rename from src/math.hpp
rename to src/util/math.hpp