diff --git a/client/main.cc b/client/main.cc
index f46336b..174db3d 100644
--- a/client/main.cc
+++ b/client/main.cc
@@ -12,7 +12,9 @@ static void cleanup(int sig){
 
 int main(){
 	fishbone::Client* client;
-	std::unordered_map<std::string, std::vector<std::string>> param;
+	fishbone::StringArrayMap param;
+
+	param["basedir"] = {"./data", "../data"};
 
 	client = new fishbone::Client(param);
 
diff --git a/data/model.obj b/data/model.obj
new file mode 100644
index 0000000..18e8c39
--- /dev/null
+++ b/data/model.obj
@@ -0,0 +1,28 @@
+# Blender 5.0.1
+# www.blender.org
+v -0.500000 -0.500000 0.500000
+v -0.500000 0.500000 0.500000
+v -0.500000 -0.500000 -0.500000
+v -0.500000 0.500000 -0.500000
+v 0.500000 -0.500000 0.500000
+v 0.500000 0.500000 0.500000
+v 0.500000 -0.500000 -0.500000
+v 0.500000 0.500000 -0.500000
+vn -1.0000 -0.0000 -0.0000
+vn -0.0000 -0.0000 -1.0000
+vn 1.0000 -0.0000 -0.0000
+vn -0.0000 -0.0000 1.0000
+vn -0.0000 -1.0000 -0.0000
+vn -0.0000 1.0000 -0.0000
+vt 0.000000 0.000000
+vt 0.000000 1.000000
+vt 1.000000 1.000000
+vt 1.000000 0.000000
+s 0
+usemtl Material
+f 1/1/1 2/2/1 4/3/1 3/4/1
+f 3/1/2 4/2/2 8/3/2 7/4/2
+f 7/4/3 8/3/3 6/2/3 5/1/3
+f 5/4/4 6/3/4 2/2/4 1/1/4
+f 3/2/5 7/3/5 5/4/5 1/1/5
+f 8/3/6 4/2/6 2/1/6 6/4/6
diff --git a/data/model.png b/data/model.png
new file mode 100644
index 0000000..1ce3321
Binary files /dev/null and b/data/model.png differ
diff --git a/engine/CMakeLists.txt b/engine/CMakeLists.txt
index 4e7fbbd..acdc2e7 100644
--- a/engine/CMakeLists.txt
+++ b/engine/CMakeLists.txt
@@ -37,6 +37,7 @@ pkg_add(fishbone sdl2 REQUIRED)
 set(FISHBONE_SOUND_USE_SDL2 ON)
 set(FISHBONE_WINDOW_USE_SDL2 ON)
 set(FISHBONE_THREAD_USE_SDL2 ON)
+set(FISHBONE_DRAW_USE_OPENGL ON)
 
 configure_file(config.h.in fishbone/config.h)
 target_include_directories(fishbone PUBLIC ${CMAKE_CURRENT_BINARY_DIR})
diff --git a/engine/config.h.in b/engine/config.h.in
index b9e25db..c42dc21 100644
--- a/engine/config.h.in
+++ b/engine/config.h.in
@@ -4,5 +4,6 @@
 #cmakedefine FISHBONE_SOUND_USE_SDL2
 #cmakedefine FISHBONE_WINDOW_USE_SDL2
 #cmakedefine FISHBONE_THREAD_USE_SDL2
+#cmakedefine FISHBONE_DRAW_USE_OPENGL
 
 #endif
diff --git a/engine/include/fishbone/base.h b/engine/include/fishbone/base.h
new file mode 100644
index 0000000..11910c5
--- /dev/null
+++ b/engine/include/fishbone/base.h
@@ -0,0 +1,25 @@
+#ifndef __FISHBONE_BASE_H__
+#define __FISHBONE_BASE_H__
+
+#include <fishbone/pre.h>
+
+namespace fishbone {
+	class Base;
+};
+
+#include <fishbone/log.h>
+#include <fishbone/file.h>
+
+namespace fishbone {
+	class Base : public fishbone::Logger {
+		fishbone::StringArrayMap mountpoints;
+
+	    public:
+		Base(fishbone::StringArrayMap param);
+
+		void		mount(std::string name, std::string path);
+		fishbone::File* open(std::string path, std::string mode);
+	};
+}; // namespace fishbone
+
+#endif
diff --git a/engine/include/fishbone/client.h b/engine/include/fishbone/client.h
index e29a7cb..c420fb3 100644
--- a/engine/include/fishbone/client.h
+++ b/engine/include/fishbone/client.h
@@ -11,19 +11,20 @@ namespace fishbone {
 #include <fishbone/window.h>
 #include <fishbone/mixer.h>
 #include <fishbone/draw.h>
+#include <fishbone/base.h>
 
 namespace fishbone {
-	class Client {
+	class Client : public fishbone::Base {
 	    public:
-		Client(std::unordered_map<std::string, std::vector<std::string>> param);
+		Client(fishbone::StringArrayMap param);
 		~Client();
 
 		bool step();
-	
+
 		fishbone::Window*      window;
 		fishbone::SoundDriver* sounddrv;
-		fishbone::Mixer* mixer;
-		fishbone::Renderer* renderer;
+		fishbone::Mixer*       mixer;
+		fishbone::Renderer*    renderer;
 	};
 }; // namespace fishbone
 
diff --git a/engine/include/fishbone/draw.h b/engine/include/fishbone/draw.h
index a786e94..d01a57e 100644
--- a/engine/include/fishbone/draw.h
+++ b/engine/include/fishbone/draw.h
@@ -7,39 +7,89 @@ namespace fishbone {
 	class Texture;
 	class Mesh;
 	class Renderer;
-};
+}; // namespace fishbone
 
-/* no includes */
+#include <fishbone/window.h>
+#include <fishbone/meshldr.h>
+#include <fishbone/textureldr.h>
+#include <fishbone/math.h>
 
 namespace fishbone {
 	class Texture {
+		void init(fishbone::Renderer* renderer, unsigned char* rgba, int width, int height);
+
 		struct Impl;
 		Impl* impl;
 
-	public:
-		Texture(fishbone::Renderer* renderer, unsigned char* rgba, int width, int height);
+	    public:
+		Texture(fishbone::Renderer* renderer, unsigned char* rgba, int width, int height) {
+			this->init(renderer, rgba, width, height);
+		}
+		Texture(fishbone::Renderer* renderer, fishbone::TextureData* data) {
+			this->init(renderer, data->rgba, data->width, data->height);
+		}
 		~Texture();
+
+		void begin();
+		void end();
 	};
 
 	class Mesh {
+		void init(fishbone::Renderer* renderer, std::vector<struct fishbone::Vector3> vertices, std::vector<struct fishbone::Vector2> texcoords, std::vector<struct fishbone::Vector3> normals);
+
 		struct Impl;
 		Impl* impl;
 
-	public:
-		Mesh(fishbone::Renderer* renderer, std::vector<struct fishbone::Vector3> vertices, std::vector<struct fishbone::Vector2> texcoords, std::vector<struct fishbone::Vector3> normals, std::vector<int> elements);
+	    public:
+		Mesh(fishbone::Renderer* renderer, std::vector<struct fishbone::Vector3> vertices, std::vector<struct fishbone::Vector2> texcoords, std::vector<struct fishbone::Vector3> normals) {
+			this->init(renderer, vertices, texcoords, normals);
+		}
+		Mesh(fishbone::Renderer* renderer, fishbone::MeshData* data) {
+			this->init(renderer, data->vertices, data->texcoords, data->normals);
+		}
 		~Mesh();
 
 		void draw();
+		void draw(struct fishbone::Vector3 pos);
+		void draw(struct fishbone::Vector3 pos, struct fishbone::Vector3 rot);
+
+		fishbone::Texture* texture;
 	};
 
 	class Renderer {
 		struct Impl;
 		Impl* impl;
 
-	public:
-		Renderer();
+	    public:
+		Renderer(fishbone::Window* window);
 		~Renderer();
+
+		void prepare();
+		void quad(std::vector<struct fishbone::Vector3> vertices, std::vector<struct fishbone::Vector2> texcoords, std::vector<struct fishbone::Vector3> normals) {
+			std::vector<struct fishbone::Vector3> v;
+			std::vector<struct fishbone::Vector2> t;
+			std::vector<struct fishbone::Vector3> n;
+
+			v = fishbone::quadToTriangle<struct fishbone::Vector3>(vertices);
+			t = fishbone::quadToTriangle<struct fishbone::Vector2>(texcoords);
+			n = fishbone::quadToTriangle<struct fishbone::Vector3>(normals);
+
+			this->triangle(v, t, n);
+		}
+		void triangle(std::vector<struct fishbone::Vector3> vertices, std::vector<struct fishbone::Vector2> texcoords, std::vector<struct fishbone::Vector3> normals);
+		void quad(std::vector<struct fishbone::Vector2> vertices, std::vector<struct fishbone::Vector2> texcoords) {
+			std::vector<struct fishbone::Vector2> v;
+			std::vector<struct fishbone::Vector2> t;
+
+			v = fishbone::quadToTriangle<struct fishbone::Vector2>(vertices);
+			t = fishbone::quadToTriangle<struct fishbone::Vector2>(texcoords);
+
+			this->triangle(v, t);
+		}
+		void triangle(std::vector<struct fishbone::Vector2> vertices, std::vector<struct fishbone::Vector2> texcoords);
 	};
-};
+
+	static float maxDistance = 64;
+}; // namespace fishbone
 
 #endif
diff --git a/engine/include/fishbone/file.h b/engine/include/fishbone/file.h
index 4dbf9ce..ff5e840 100644
--- a/engine/include/fishbone/file.h
+++ b/engine/include/fishbone/file.h
@@ -13,6 +13,7 @@ namespace fishbone {
 	class File {
 		std::ifstream ifs;
 		std::ofstream ofs;
+		bool	      opened;
 
 	    public:
 		File();
@@ -21,9 +22,9 @@ namespace fishbone {
 
 		virtual size_t read(void* buffer, size_t size);
 		virtual size_t write(const void* buffer, size_t size);
+		bool	       good();
 
 		size_t size;
-		bool   good;
 	};
 }; // namespace fishbone
 
diff --git a/engine/include/fishbone/filesystem.h b/engine/include/fishbone/filesystem.h
new file mode 100644
index 0000000..fa1ded1
--- /dev/null
+++ b/engine/include/fishbone/filesystem.h
@@ -0,0 +1,16 @@
+#ifndef __FISHBONE_FILESYSTEM_H__
+#define __FISHBONE_FILESYSTEM_H__
+
+#include <fishbone/pre.h>
+
+namespace fishbone {
+	bool exists(std::string path);
+};
+
+/* no includes */
+
+namespace fishbone {
+	bool exists(std::string path);
+};
+
+#endif
diff --git a/engine/include/fishbone/foundation.h b/engine/include/fishbone/foundation.h
index 85f859e..d2b7bcd 100644
--- a/engine/include/fishbone/foundation.h
+++ b/engine/include/fishbone/foundation.h
@@ -10,5 +10,11 @@
 #include <fishbone/resource.h>
 #include <fishbone/draw.h>
 #include <fishbone/time.h>
+#include <fishbone/base.h>
+#include <fishbone/meshldr.h>
+#include <fishbone/log.h>
+#include <fishbone/math.h>
+#include <fishbone/textureldr.h>
+#include <fishbone/filesystem.h>
 
 #endif
diff --git a/engine/include/fishbone/log.h b/engine/include/fishbone/log.h
new file mode 100644
index 0000000..83a0978
--- /dev/null
+++ b/engine/include/fishbone/log.h
@@ -0,0 +1,35 @@
+#ifndef __FISHBONE_LOG_H__
+#define __FISHBONE_LOG_H__
+
+#include <fishbone/pre.h>
+
+namespace fishbone {
+	class Logger;
+};
+
+/* no includes */
+
+namespace fishbone {
+	class Logger {
+		enum LoggerLevel {
+			Log = 0,
+			Info,
+			Warn,
+			Error
+		};
+
+		void init(std::string path);
+
+		std::ofstream ofs;
+
+	    public:
+		Logger();
+		Logger(std::string path);
+		~Logger();
+
+		void log(std::string arg);
+		void log(int level, std::string arg);
+	};
+}; // namespace fishbone
+
+#endif
diff --git a/engine/include/fishbone/machdep.h b/engine/include/fishbone/machdep.h
index 681fa77..91723e7 100644
--- a/engine/include/fishbone/machdep.h
+++ b/engine/include/fishbone/machdep.h
@@ -11,6 +11,7 @@
 #include <cstdio>
 #include <cstring>
 #include <cmath>
+#include <cstdlib>
 
 #include <fishbone/config.h>
 
diff --git a/engine/include/fishbone/math.h b/engine/include/fishbone/math.h
new file mode 100644
index 0000000..838640f
--- /dev/null
+++ b/engine/include/fishbone/math.h
@@ -0,0 +1,41 @@
+#ifndef __FISHBONE_MATH_H__
+#define __FISHBONE_MATH_H__
+
+#include <fishbone/pre.h>
+
+namespace fishbone {
+	float cot(float x);
+	template <typename T>
+	std::vector<T> quadToTriangle(std::vector<T> v);
+}; // namespace fishbone
+
+/* no includes */
+
+namespace fishbone {
+	float cot(float x);
+	template <typename T>
+	std::vector<T> quadToTriangle(std::vector<T> v) {
+		std::vector<T> r;
+
+		/**
+		 * 1-4
+		 * |\|
+		 * 2-3
+		 */
+		for(int i = 0; i < v.size(); i += 4) {
+			r.push_back(v[i + 0]);
+			r.push_back(v[i + 1]);
+			r.push_back(v[i + 2]);
+
+			r.push_back(v[i + 2]);
+			r.push_back(v[i + 3]);
+			r.push_back(v[i + 0]);
+		}
+
+		return r;
+	}
+
+	static double pi = 3.14159265358979323846;
+}; // namespace fishbone
+
+#endif
diff --git a/engine/include/fishbone/meshldr.h b/engine/include/fishbone/meshldr.h
new file mode 100644
index 0000000..a32dc18
--- /dev/null
+++ b/engine/include/fishbone/meshldr.h
@@ -0,0 +1,25 @@
+#ifndef __FISHBONE_MESHLDR_H__
+#define __FISHBONE_MESHLDR_H__
+
+#include <fishbone/pre.h>
+
+namespace fishbone {
+	class MeshData;
+};
+
+#include <fishbone/file.h>
+
+namespace fishbone {
+	class MeshData {
+	    public:
+		MeshData(fishbone::File* file);
+
+		bool good();
+
+		std::vector<struct fishbone::Vector3> vertices;
+		std::vector<struct fishbone::Vector2> texcoords;
+		std::vector<struct fishbone::Vector3> normals;
+	};
+}; // namespace fishbone
+
+#endif
diff --git a/engine/include/fishbone/mixer.h b/engine/include/fishbone/mixer.h
index 23330af..87d4fb5 100644
--- a/engine/include/fishbone/mixer.h
+++ b/engine/include/fishbone/mixer.h
@@ -23,10 +23,10 @@ namespace fishbone {
 		void		 lock();
 		void		 unlock();
 
-		static const int		    rate = 44100;
 		std::vector<fishbone::SoundLoader*> loaders;
 		std::vector<fishbone::Sound*>	    sounds;
 		float				    position[3];
+		static const int		    rate = 44100;
 	};
 }; // namespace fishbone
 
diff --git a/engine/include/fishbone/resource.h b/engine/include/fishbone/resource.h
index a995f15..8efa342 100644
--- a/engine/include/fishbone/resource.h
+++ b/engine/include/fishbone/resource.h
@@ -12,10 +12,10 @@ namespace fishbone {
 namespace fishbone {
 	class Resource {
 	    public:
-		fishbone::File* open(std::string path);
-
 		Resource(std::string path);
 		~Resource();
+
+		fishbone::File* open(std::string path);
 	};
 }; // namespace fishbone
 
diff --git a/engine/include/fishbone/sound.h b/engine/include/fishbone/sound.h
index 1277ec5..4ee2f0d 100644
--- a/engine/include/fishbone/sound.h
+++ b/engine/include/fishbone/sound.h
@@ -55,12 +55,16 @@ namespace fishbone {
 
 	class SoundLoader {
 	    public:
-		SoundLoader(){};
-		~SoundLoader(){};
+		SoundLoader() {};
+		~SoundLoader() {};
 
-		virtual Sound* open(Mixer* mixer, void* buffer, size_t size){return nullptr;};
-		virtual int    read(Sound* sound, short* buffer, size_t frames){return 0;};
-		virtual void   seek(Sound* sound, size_t pos){};
+		virtual Sound* open(Mixer* mixer, void* buffer, size_t size) {
+			return nullptr;
+		};
+		virtual int read(Sound* sound, short* buffer, size_t frames) {
+			return 0;
+		};
+		virtual void seek(Sound* sound, size_t pos) {};
 	};
 
 	class Sound {
diff --git a/engine/include/fishbone/textureldr.h b/engine/include/fishbone/textureldr.h
new file mode 100644
index 0000000..694f806
--- /dev/null
+++ b/engine/include/fishbone/textureldr.h
@@ -0,0 +1,26 @@
+#ifndef __FISHBONE_TEXLDR_H__
+#define __FISHBONE_TEXLDR_H__
+
+#include <fishbone/pre.h>
+
+namespace fishbone {
+	class TextureData;
+};
+
+#include <fishbone/file.h>
+
+namespace fishbone {
+	class TextureData {
+	    public:
+		TextureData(fishbone::File* file);
+		~TextureData();
+
+		bool good();
+
+		unsigned char* rgba;
+		int	       width;
+		int	       height;
+	};
+}; // namespace fishbone
+
+#endif
diff --git a/engine/include/fishbone/time.h b/engine/include/fishbone/time.h
index cd7e6a9..34ed080 100644
--- a/engine/include/fishbone/time.h
+++ b/engine/include/fishbone/time.h
@@ -7,7 +7,7 @@ namespace fishbone {
 	using AccurateClock = std::chrono::time_point<std::chrono::high_resolution_clock, std::chrono::high_resolution_clock::duration>;
 
 	fishbone::AccurateClock accurateTime();
-};
+}; // namespace fishbone
 
 /* no includes */
 
diff --git a/engine/include/fishbone/types.h b/engine/include/fishbone/types.h
index 9d01009..30c15f6 100644
--- a/engine/include/fishbone/types.h
+++ b/engine/include/fishbone/types.h
@@ -5,15 +5,40 @@
 
 namespace fishbone {
 	struct Vector2 {
+		struct fishbone::Vector2 operator+(struct fishbone::Vector2 v) const;
+		struct fishbone::Vector2 operator-(struct fishbone::Vector2 v) const;
+
+		float			 length();
+		struct fishbone::Vector2 normalize();
+
 		float x;
 		float y;
 	};
 
 	struct Vector3 {
+		struct fishbone::Vector3 operator+(struct fishbone::Vector3 v) const;
+		struct fishbone::Vector3 operator-(struct fishbone::Vector3 v) const;
+		struct fishbone::Vector3 operator*(struct fishbone::Vector3 v) const;
+
+		float			 length();
+		struct fishbone::Vector3 normalize();
+
 		float x;
 		float y;
 		float z;
 	};
-};
+
+	struct Quaternion {
+		struct fishbone::Quaternion operator+(struct fishbone::Quaternion q) const;
+		struct fishbone::Quaternion operator-(struct fishbone::Quaternion q) const;
+
+		float w;
+		float x;
+		float y;
+		float z;
+	};
+
+	using StringArrayMap = std::unordered_map<std::string, std::vector<std::string>>;
+}; // namespace fishbone
 
 #endif
diff --git a/engine/include/fishbone/window.h b/engine/include/fishbone/window.h
index 0846a75..53cd0c0 100644
--- a/engine/include/fishbone/window.h
+++ b/engine/include/fishbone/window.h
@@ -17,6 +17,10 @@ namespace fishbone {
 		~Window();
 
 		void poll();
+		void swapBuffer();
+
+		int width;
+		int height;
 	};
 }; // namespace fishbone
 
diff --git a/engine/src/base.cc b/engine/src/base.cc
new file mode 100644
index 0000000..f657a79
--- /dev/null
+++ b/engine/src/base.cc
@@ -0,0 +1,52 @@
+#include <fishbone/foundation.h>
+
+fishbone::Base::Base(fishbone::StringArrayMap param) {
+	for(auto i = param.begin(); i != param.end(); i++) {
+		if(i->first == "basedir") {
+			for(int j = 0; j < i->second.size(); j++) {
+				this->mount("base", i->second[j]);
+			}
+		}
+	}
+}
+
+void fishbone::Base::mount(std::string name, std::string path) {
+	if(this->mountpoints.find(name) == this->mountpoints.end()) this->mountpoints[name] = {};
+
+	this->mountpoints[name].push_back(path);
+}
+
+fishbone::File* fishbone::Base::open(std::string path, std::string mode) {
+	fishbone::File* f = nullptr;
+
+	for(int i = 0; i < path.size() - 1; i++) {
+		if(path.substr(i, 2) == ":/") {
+			std::string p = path.substr(i + 1);
+			std::string k = path.substr(0, i);
+
+			if(this->mountpoints.find(k) != this->mountpoints.end()) {
+				for(int j = 0; j < this->mountpoints[k].size(); j++) {
+					f = new fishbone::File(this->mountpoints[k][j] + p, mode);
+
+					if(!f->good()) {
+						delete f;
+						f = nullptr;
+					}
+
+					if(f != nullptr && f->good()) break;
+				}
+			}
+
+			break;
+		}
+	}
+
+	if(f == nullptr) f = new fishbone::File(path, mode);
+
+	if(f != nullptr && !f->good()) {
+		delete f;
+		f = nullptr;
+	}
+
+	return f;
+}
diff --git a/engine/src/client.cc b/engine/src/client.cc
index bc17717..08f64a1 100644
--- a/engine/src/client.cc
+++ b/engine/src/client.cc
@@ -1,18 +1,48 @@
 #include <fishbone/foundation.h>
 
-fishbone::Client::Client(std::unordered_map<std::string, std::vector<std::string>> param){
-	this->window = new fishbone::Window("Fishbone", 800, 600);
+fishbone::File* f;
+fishbone::Mesh* m;
+
+fishbone::Client::Client(fishbone::StringArrayMap param)
+    : fishbone::Base::Base(param) {
+	this->window   = new fishbone::Window("Fishbone", 800, 600);
 	this->sounddrv = new fishbone::SoundDriver();
-	this->mixer = &this->sounddrv->mixer;
-	this->renderer = new fishbone::Renderer();
+	this->mixer    = &this->sounddrv->mixer;
+	this->renderer = new fishbone::Renderer(this->window);
+
+	fishbone::MeshData*    md;
+	fishbone::TextureData* td;
+
+	f  = this->open("base:/model.obj", "r");
+	md = new fishbone::MeshData(f);
+	delete f;
+
+	f  = this->open("base:/model.png", "r");
+	td = new fishbone::TextureData(f);
+	delete f;
+
+	m	   = new fishbone::Mesh(this->renderer, md);
+	m->texture = new fishbone::Texture(this->renderer, td);
+
+	delete md;
+	delete td;
 }
 
-fishbone::Client::~Client(){
+fishbone::Client::~Client() {
 	delete this->renderer;
 	delete this->sounddrv;
 	delete this->window;
 }
 
-bool fishbone::Client::step(){
+float r = 0;
+
+bool fishbone::Client::step() {
+	this->renderer->prepare();
+
+	m->draw((struct fishbone::Vector3){0, 0, 0}, (struct fishbone::Vector3){r, r, r});
+	r += 30.0 / 60;
+
+	this->window->swapBuffer();
+
 	return true;
 }
diff --git a/engine/src/draw/opengl.cc b/engine/src/draw/opengl.cc
index 0a0c187..9289620 100644
--- a/engine/src/draw/opengl.cc
+++ b/engine/src/draw/opengl.cc
@@ -1,12 +1,14 @@
+#include <fishbone/config.h>
+#ifdef FISHBONE_DRAW_USE_OPENGL
 #include <fishbone/foundation.h>
 
 struct fishbone::Texture::Impl {
 	GLuint texture;
 };
 
-fishbone::Texture::Texture(fishbone::Renderer* renderer, unsigned char* rgba, int width, int height){
+void fishbone::Texture::init(fishbone::Renderer* renderer, unsigned char* rgba, int width, int height) {
 	this->impl = new struct fishbone::Texture::Impl();
-	
+
 	glGenTextures(1, &this->impl->texture);
 	glBindTexture(GL_TEXTURE_2D, this->impl->texture);
 	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, rgba);
@@ -15,70 +17,88 @@ fishbone::Texture::Texture(fishbone::Renderer* renderer, unsigned char* rgba, in
 	glBindTexture(GL_TEXTURE_2D, 0);
 }
 
-fishbone::Texture::~Texture(){
+fishbone::Texture::~Texture() {
 	glDeleteTextures(1, &this->impl->texture);
 
 	delete this->impl;
 }
 
+void fishbone::Texture::begin() {
+	glEnable(GL_TEXTURE_2D);
+	glBindTexture(GL_TEXTURE_2D, this->impl->texture);
+}
+
+void fishbone::Texture::end() {
+	glBindTexture(GL_TEXTURE_2D, 0);
+	glDisable(GL_TEXTURE_2D);
+}
+
 struct fishbone::Mesh::Impl {
 	GLuint v_vbo;
 	GLuint t_vbo;
 	GLuint n_vbo;
-	GLuint e_vbo;
 
-	float* vertices;
-	float* texcoords;
-	float* normals;
-	int* elements;
+	GLfloat* vertices;
+	GLfloat* texcoords;
+	GLfloat* normals;
 
 	int count;
 };
 
-fishbone::Mesh::Mesh(fishbone::Renderer* renderer, std::vector<struct fishbone::Vector3> vertices, std::vector<struct fishbone::Vector2> texcoords, std::vector<struct fishbone::Vector3> normals, std::vector<int> elements){
-	this->impl = new struct fishbone::Mesh::Impl();
-	this->impl->vertices = new float[vertices.size() * 3];
-	this->impl->texcoords = new float[texcoords.size() * 2];
-	this->impl->normals = new float[normals.size() * 3];
-	this->impl->elements = new int[elements.size()];
-	this->impl->count = elements.size();
+void fishbone::Mesh::init(fishbone::Renderer* renderer, std::vector<struct fishbone::Vector3> vertices, std::vector<struct fishbone::Vector2> texcoords, std::vector<struct fishbone::Vector3> normals) {
+	this->texture = nullptr;
+
+	this->impl	      = new struct fishbone::Mesh::Impl();
+	this->impl->vertices  = new GLfloat[vertices.size() * 3];
+	this->impl->texcoords = new GLfloat[texcoords.size() * 2];
+	this->impl->normals   = new GLfloat[normals.size() * 3];
+	this->impl->count     = vertices.size();
 
 	glGenBuffers(1, &this->impl->v_vbo);
 	glGenBuffers(1, &this->impl->t_vbo);
 	glGenBuffers(1, &this->impl->n_vbo);
-	glGenBuffers(1, &this->impl->e_vbo);
+
+	for(int i = 0; i < vertices.size(); i++) {
+		this->impl->vertices[i * 3 + 0] = vertices[i].x;
+		this->impl->vertices[i * 3 + 1] = vertices[i].y;
+		this->impl->vertices[i * 3 + 2] = vertices[i].z;
+	}
+
+	for(int i = 0; i < texcoords.size(); i++) {
+		this->impl->texcoords[i * 2 + 0] = texcoords[i].x;
+		this->impl->texcoords[i * 2 + 1] = texcoords[i].y;
+	}
+
+	for(int i = 0; i < normals.size(); i++) {
+		this->impl->normals[i * 3 + 0] = normals[i].x;
+		this->impl->normals[i * 3 + 1] = normals[i].y;
+		this->impl->normals[i * 3 + 2] = normals[i].z;
+	}
 
 	glBindBuffer(GL_ARRAY_BUFFER, this->impl->v_vbo);
 	glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(float) * 3, this->impl->vertices, GL_STATIC_DRAW);
 
 	glBindBuffer(GL_ARRAY_BUFFER, this->impl->t_vbo);
-	glBufferData(GL_ARRAY_BUFFER, texcoords.size() * sizeof(float) * 3, this->impl->texcoords, GL_STATIC_DRAW);
+	glBufferData(GL_ARRAY_BUFFER, texcoords.size() * sizeof(float) * 2, this->impl->texcoords, GL_STATIC_DRAW);
 
 	glBindBuffer(GL_ARRAY_BUFFER, this->impl->n_vbo);
 	glBufferData(GL_ARRAY_BUFFER, normals.size() * sizeof(float) * 3, this->impl->normals, GL_STATIC_DRAW);
 
 	glBindBuffer(GL_ARRAY_BUFFER, 0);
-
-	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, this->impl->e_vbo);
-	glBufferData(GL_ELEMENT_ARRAY_BUFFER, elements.size() * sizeof(int), this->impl->elements, GL_STATIC_DRAW);
-
-	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
 }
 
-fishbone::Mesh::~Mesh(){
-	glDeleteBuffers(1, &this->impl->e_vbo);
+fishbone::Mesh::~Mesh() {
 	glDeleteBuffers(1, &this->impl->n_vbo);
 	glDeleteBuffers(1, &this->impl->t_vbo);
 	glDeleteBuffers(1, &this->impl->v_vbo);
 
-	delete[] this->impl->elements;
 	delete[] this->impl->normals;
 	delete[] this->impl->texcoords;
 	delete[] this->impl->vertices;
 	delete this->impl;
 }
 
-void fishbone::Mesh::draw(){
+void fishbone::Mesh::draw() {
 	glEnableClientState(GL_VERTEX_ARRAY);
 	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 	glEnableClientState(GL_NORMAL_ARRAY);
@@ -92,18 +112,197 @@ void fishbone::Mesh::draw(){
 	glBindBuffer(GL_ARRAY_BUFFER, this->impl->n_vbo);
 	glNormalPointer(GL_FLOAT, 0, nullptr);
 
-	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, this->impl->e_vbo);
-	glEnable(GL_TEXTURE_2D);
-	glDrawElements(GL_TRIANGLES, this->impl->count, GL_UNSIGNED_INT, nullptr);
-	glDisable(GL_TEXTURE_2D);
+	glColor3f(1, 1, 1);
+	if(this->texture != nullptr) this->texture->begin();
+	glDrawArrays(GL_TRIANGLES, 0, this->impl->count);
+	if(this->texture != nullptr) this->texture->end();
+
+	glBindBuffer(GL_ARRAY_BUFFER, 0);
 
 	glDisableClientState(GL_NORMAL_ARRAY);
 	glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 	glDisableClientState(GL_VERTEX_ARRAY);
 }
 
-fishbone::Renderer::Renderer(){
+void fishbone::Mesh::draw(struct fishbone::Vector3 pos) {
+	this->draw(pos, {0, 0, 0});
 }
 
-fishbone::Renderer::~Renderer(){
+void fishbone::Mesh::draw(struct fishbone::Vector3 pos, struct fishbone::Vector3 rot) {
+	glPushMatrix();
+	glTranslatef(pos.x, pos.y, pos.z);
+	glRotatef(rot.x, 1, 0, 0);
+	glRotatef(rot.y, 0, 1, 0);
+	glRotatef(rot.z, 0, 0, 1);
+
+	this->draw();
+
+	glPopMatrix();
 }
+
+struct fishbone::Renderer::Impl {
+	fishbone::Window* window;
+};
+
+static void cameraPerspective(float width, float height) {
+	float	 aspect;
+	float	 f;
+	GLdouble matrix[16];
+	float	 fovy  = 60.0;
+	float	 znear = 0.01;
+	float	 zfar  = fishbone::maxDistance;
+
+	aspect = width / height;
+	f      = fishbone::cot(fovy / 180 * fishbone::pi / 2);
+
+	for(int i = 0; i < 16; i++) matrix[i] = 0;
+	matrix[4 * 0 + 0] = f / aspect;
+	matrix[4 * 1 + 1] = f;
+	matrix[4 * 2 + 2] = (zfar + znear) / (znear - zfar);
+	matrix[4 * 3 + 2] = ((GLdouble)2 * zfar * znear) / (znear - zfar);
+	matrix[4 * 2 + 3] = -1;
+
+	glMultMatrixd(matrix);
+}
+
+static void lookAt(fishbone::Vector3 camera, fishbone::Vector3 look_at) {
+	GLdouble	  matrix[16];
+	fishbone::Vector3 f;
+	fishbone::Vector3 up;
+	fishbone::Vector3 s;
+	fishbone::Vector3 u;
+
+	f = (look_at - camera).normalize();
+
+	up.x = 0;
+	up.y = 1;
+	up.z = 0;
+	up   = up.normalize();
+
+	s = (f * up).normalize();
+
+	u = s * f;
+
+	for(int i = 0; i < 16; i++) matrix[i] = 0;
+	matrix[4 * 0 + 0] = s.x;
+	matrix[4 * 1 + 0] = s.y;
+	matrix[4 * 2 + 0] = s.z;
+	matrix[4 * 0 + 1] = u.x;
+	matrix[4 * 1 + 1] = u.y;
+	matrix[4 * 2 + 1] = u.z;
+	matrix[4 * 0 + 2] = -f.x;
+	matrix[4 * 1 + 2] = -f.y;
+	matrix[4 * 2 + 2] = -f.z;
+	matrix[4 * 3 + 3] = 1;
+
+	glMultMatrixd(matrix);
+	glTranslated(-camera.x, -camera.y, -camera.z);
+}
+
+fishbone::Renderer::Renderer(fishbone::Window* window) {
+	glEnable(GL_DEPTH_TEST);
+	glEnable(GL_NORMALIZE);
+	glEnable(GL_BLEND);
+	glEnable(GL_COLOR_MATERIAL);
+	glEnable(GL_CULL_FACE);
+	glEnable(GL_LIGHTING);
+	glEnable(GL_LIGHT0);
+
+	glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
+
+	glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
+
+	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+	glLightfv(GL_LIGHT0, GL_POSITION, (GLfloat[]){0, -1, 0, 1});
+
+	this->impl	   = new struct fishbone::Renderer::Impl();
+	this->impl->window = window;
+}
+
+fishbone::Renderer::~Renderer() {
+	delete this->impl;
+}
+
+void fishbone::Renderer::prepare() {
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	cameraPerspective(this->impl->window->width, this->impl->window->height);
+
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+	lookAt({4, 4, 4}, {0, 0, 0});
+}
+
+void fishbone::Renderer::triangle(std::vector<struct fishbone::Vector3> vertices, std::vector<struct fishbone::Vector2> texcoords, std::vector<struct fishbone::Vector3> normals) {
+	GLfloat* v = new GLfloat[vertices.size() * 3];
+	GLfloat* t = new GLfloat[texcoords.size() * 2];
+	GLfloat* n = new GLfloat[normals.size() * 3];
+
+	for(int i = 0; i < vertices.size(); i++) {
+		v[i * 3 + 0] = vertices[i].x;
+		v[i * 3 + 1] = vertices[i].y;
+		v[i * 3 + 2] = vertices[i].z;
+	}
+
+	for(int i = 0; i < texcoords.size(); i++) {
+		t[i * 2 + 0] = texcoords[i].x;
+		t[i * 2 + 1] = texcoords[i].y;
+	}
+
+	for(int i = 0; i < normals.size(); i++) {
+		n[i * 3 + 0] = normals[i].x;
+		n[i * 3 + 1] = normals[i].y;
+		n[i * 3 + 2] = normals[i].z;
+	}
+
+	glEnableClientState(GL_VERTEX_ARRAY);
+	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+	glEnableClientState(GL_NORMAL_ARRAY);
+
+	glVertexPointer(3, GL_FLOAT, 0, v);
+	glTexCoordPointer(2, GL_FLOAT, 0, t);
+	glNormalPointer(GL_FLOAT, 0, n);
+
+	glDrawArrays(GL_TRIANGLES, 0, vertices.size());
+
+	glDisableClientState(GL_NORMAL_ARRAY);
+	glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+	glDisableClientState(GL_VERTEX_ARRAY);
+
+	delete[] n;
+	delete[] t;
+	delete[] v;
+}
+
+void fishbone::Renderer::triangle(std::vector<struct fishbone::Vector2> vertices, std::vector<struct fishbone::Vector2> texcoords) {
+	GLfloat* v = new GLfloat[vertices.size() * 2];
+	GLfloat* t = new GLfloat[texcoords.size() * 2];
+
+	for(int i = 0; i < vertices.size(); i++) {
+		v[i * 2 + 0] = vertices[i].x;
+		v[i * 2 + 1] = vertices[i].y;
+	}
+
+	for(int i = 0; i < texcoords.size(); i++) {
+		t[i * 2 + 0] = texcoords[i].x;
+		t[i * 2 + 1] = texcoords[i].y;
+	}
+
+	glEnableClientState(GL_VERTEX_ARRAY);
+	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+
+	glVertexPointer(2, GL_FLOAT, 0, v);
+	glTexCoordPointer(2, GL_FLOAT, 0, t);
+
+	glDrawArrays(GL_TRIANGLES, 0, vertices.size());
+
+	glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+	glDisableClientState(GL_VERTEX_ARRAY);
+
+	delete[] t;
+	delete[] v;
+}
+#endif
diff --git a/engine/src/file.cc b/engine/src/file.cc
index fce8a35..2c7f35c 100644
--- a/engine/src/file.cc
+++ b/engine/src/file.cc
@@ -1,13 +1,12 @@
 #include <fishbone/file.h>
 
-fishbone::File::File(){
-	this->good = true;
+fishbone::File::File() {
 	this->size = 0;
 }
 
 fishbone::File::File(std::string path, std::string type) {
-	this->good = false;
-	this->size = 0;
+	this->size   = 0;
+	this->opened = false;
 
 	if(type == "r") {
 		this->ifs = std::ifstream(path, std::ios::binary);
@@ -25,7 +24,7 @@ fishbone::File::File(std::string path, std::string type) {
 		return;
 	}
 
-	this->good = true;
+	this->opened = true;
 }
 
 fishbone::File::~File() {
@@ -48,3 +47,8 @@ size_t fishbone::File::write(const void* buffer, size_t size) {
 
 	return size;
 }
+
+bool fishbone::File::good() {
+	if(this->opened) return true;
+	return false;
+}
diff --git a/engine/src/filesystem.cc b/engine/src/filesystem.cc
new file mode 100644
index 0000000..dbdd7d9
--- /dev/null
+++ b/engine/src/filesystem.cc
@@ -0,0 +1,11 @@
+#include <fishbone/foundation.h>
+
+#include <sys/stat.h>
+
+bool fishbone::exists(std::string path) {
+	struct stat s;
+
+	if(stat(path.c_str(), &s) == 0) return true;
+
+	return false;
+}
diff --git a/engine/src/log.cc b/engine/src/log.cc
new file mode 100644
index 0000000..433e1ad
--- /dev/null
+++ b/engine/src/log.cc
@@ -0,0 +1,25 @@
+#include <fishbone/foundation.h>
+
+void fishbone::Logger::init(std::string path) {
+	this->ofs = std::ofstream(path, std::ios_base::app);
+}
+
+fishbone::Logger::Logger() {
+	this->init("log.txt");
+}
+
+fishbone::Logger::Logger(std::string path) {
+	this->init(path);
+}
+
+fishbone::Logger::~Logger() {
+	this->ofs.close();
+}
+
+void fishbone::Logger::log(std::string arg) {
+	this->log(fishbone::Logger::Info, arg);
+}
+
+void fishbone::Logger::log(int level, std::string arg) {
+	this->ofs << "" + arg << std::endl;
+}
diff --git a/engine/src/math.cc b/engine/src/math.cc
new file mode 100644
index 0000000..c341b23
--- /dev/null
+++ b/engine/src/math.cc
@@ -0,0 +1,5 @@
+#include <fishbone/foundation.h>
+
+float fishbone::cot(float x) {
+	return 1.0 / tan(x);
+}
diff --git a/engine/src/meshldr.cc b/engine/src/meshldr.cc
new file mode 100644
index 0000000..750699f
--- /dev/null
+++ b/engine/src/meshldr.cc
@@ -0,0 +1,128 @@
+#include <fishbone/foundation.h>
+
+static std::vector<int> parseFace(std::string s) {
+	std::vector<int> v;
+	std::string	 n = "";
+
+	for(int i = 0; i < s.size(); i++) {
+		if(s[i] == '/') {
+			v.push_back(std::stoi(n));
+			n = "";
+		} else {
+			n += s[i];
+		}
+	}
+	if(n.size() > 0) v.push_back(std::stoi(n));
+
+	return v;
+}
+
+fishbone::MeshData::MeshData(fishbone::File* f) {
+	char				      c;
+	std::string			      l = "";
+	std::vector<struct fishbone::Vector3> v;
+	std::vector<struct fishbone::Vector2> vt;
+	std::vector<struct fishbone::Vector3> vn;
+	fishbone::Vector2		      e2 = {0, 0};
+	fishbone::Vector3		      e3 = {0, 0, 0};
+	float				      lm = 0; /* leftmost */
+	float				      rm = 0; /* rightmost */
+	float				      um = 0; /* upmost */
+	float				      dm = 0; /* downmost */
+	float				      fm = 0; /* frontmost */
+	float				      bm = 0; /* backmost */
+
+	while(f->read(&c, 1) == 1) {
+		if(c == '\n') {
+			if(l.size() == 0) {
+			} else if(l[0] == '#') {
+			} else {
+				std::vector<std::string> vs;
+				std::string		 n = "";
+
+				for(int i = 0; i < l.size(); i++) {
+					if(l[i] == ' ') {
+						vs.push_back(n);
+						n = "";
+					} else {
+						n += l[i];
+					}
+				}
+				if(n.size() > 0) vs.push_back(n);
+
+				if(vs[0] == "v") {
+					fishbone::Vector3 nv = {std::stof(vs[1]), std::stof(vs[2]), std::stof(vs[3])};
+
+					if(lm > nv.x) lm = nv.x;
+					if(rm < nv.x) rm = nv.x;
+
+					if(dm > nv.y) dm = nv.y;
+					if(um < nv.y) um = nv.y;
+
+					if(fm > nv.z) fm = nv.z;
+					if(bm < nv.z) bm = nv.z;
+
+					v.push_back(nv);
+				} else if(vs[0] == "vt") {
+					fishbone::Vector2 nv = {std::stof(vs[1]), 1 - std::stof(vs[2])};
+
+					vt.push_back(nv);
+				} else if(vs[0] == "vn") {
+					fishbone::Vector3 nv = {std::stof(vs[1]), std::stof(vs[2]), std::stof(vs[3])};
+
+					vn.push_back(nv);
+				} else if(vs[0] == "f") {
+					float			 sc = 0;
+					float			 lr = fabs(lm - rm);
+					float			 ud = fabs(um - dm);
+					float			 bf = fabs(fm - bm);
+					std::vector<int>	 ind;
+					struct fishbone::Vector3 v3;
+
+					if(sc < lr) sc = lr;
+					if(sc < ud) sc = ud;
+					if(sc < bf) sc = bf;
+
+					sc /= 2;
+
+#define PUSH(i) \
+	ind = parseFace(vs[i]); \
+	v3  = v[ind[0] - 1]; \
+\
+	v3.x /= sc; \
+	v3.y /= sc; \
+	v3.z /= sc; \
+\
+	this->vertices.push_back(v3); \
+	this->texcoords.push_back(ind.size() >= 2 ? vt[ind[1] - 1] : e2); \
+	this->normals.push_back(ind.size() >= 3 ? vn[ind[2] - 1] : e3);
+
+					for(int i = 1; i < 4; i++) {
+						PUSH(i);
+					}
+
+					/* If it's quad...
+					 * 1-4
+					 * |\|
+					 * 2-3
+					 */
+					if(vs.size() == 5) {
+						PUSH(3);
+						PUSH(4);
+						PUSH(1);
+					}
+				}
+			}
+			l = "";
+		} else if(c != '\r') {
+			l += c;
+		}
+	}
+}
+
+bool fishbone::MeshData::good() {
+	if(this->vertices.size() == 0) return false;
+	if(this->texcoords.size() == 0) return false;
+	if(this->normals.size() == 0) return false;
+	return true;
+}
diff --git a/engine/src/mixer.cc b/engine/src/mixer.cc
index 9b58af1..7a78019 100644
--- a/engine/src/mixer.cc
+++ b/engine/src/mixer.cc
@@ -106,7 +106,7 @@ fishbone::Sound* fishbone::Mixer::open(const char* path) {
 	unsigned char*	 buffer;
 	fishbone::Sound* snd;
 
-	if(!f.good) return nullptr;
+	if(!f.good()) return nullptr;
 
 	buffer = new unsigned char[f.size];
 
diff --git a/engine/src/physics.cc b/engine/src/physics.cc
new file mode 100644
index 0000000..10e9255
--- /dev/null
+++ b/engine/src/physics.cc
@@ -0,0 +1 @@
+#include <fishbone/foundation.h>
diff --git a/engine/src/textureldr.cc b/engine/src/textureldr.cc
new file mode 100644
index 0000000..068bce6
--- /dev/null
+++ b/engine/src/textureldr.cc
@@ -0,0 +1,23 @@
+#include <fishbone/foundation.h>
+
+#include <iostream>
+
+fishbone::TextureData::TextureData(fishbone::File* f) {
+	unsigned char* buf = new unsigned char[f->size];
+	int	       ch;
+
+	f->read(buf, f->size);
+
+	this->rgba = stbi_load_from_memory(buf, f->size, &this->width, &this->height, &ch, 4);
+
+	delete[] buf;
+}
+
+fishbone::TextureData::~TextureData() {
+	if(this->rgba != nullptr) free(this->rgba);
+}
+
+bool fishbone::TextureData::good() {
+	if(this->rgba == nullptr) return false;
+	return true;
+}
diff --git a/engine/src/time.cc b/engine/src/time.cc
index fdf52c4..1046608 100644
--- a/engine/src/time.cc
+++ b/engine/src/time.cc
@@ -1,5 +1,5 @@
 #include <fishbone/foundation.h>
 
-fishbone::AccurateClock fishbone::accurateTime(){
+fishbone::AccurateClock fishbone::accurateTime() {
 	return std::chrono::high_resolution_clock::now();
 }
diff --git a/engine/src/types.cc b/engine/src/types.cc
new file mode 100644
index 0000000..b445192
--- /dev/null
+++ b/engine/src/types.cc
@@ -0,0 +1,64 @@
+#include <fishbone/foundation.h>
+
+struct fishbone::Vector2 fishbone::Vector2::operator+(struct fishbone::Vector2 v) const {
+	return {this->x + v.x, this->y + v.y};
+}
+
+struct fishbone::Vector2 fishbone::Vector2::operator-(struct fishbone::Vector2 v) const {
+	return {this->x - v.x, this->y - v.y};
+}
+
+float fishbone::Vector2::length() {
+	return sqrt(this->x * this->x + this->y * this->y);
+}
+
+struct fishbone::Vector2 fishbone::Vector2::normalize() {
+	float l = this->length();
+
+	if(l > 0) {
+		l = 1 / l;
+	} else {
+		l = 0;
+	}
+
+	return {this->x * l, this->y * l};
+}
+
+struct fishbone::Vector3 fishbone::Vector3::operator+(struct fishbone::Vector3 v) const {
+	return {this->x + v.x, this->y + v.y, this->z + v.z};
+}
+
+struct fishbone::Vector3 fishbone::Vector3::operator-(struct fishbone::Vector3 v) const {
+	return {this->x - v.x, this->y - v.y, this->z - v.z};
+}
+
+struct fishbone::Vector3 fishbone::Vector3::operator*(struct fishbone::Vector3 v) const {
+	return {
+	    this->y * v.z - this->z * v.y,
+	    this->z * v.x - this->x * v.z,
+	    this->x * v.y - this->y * v.x};
+}
+
+float fishbone::Vector3::length() {
+	return sqrt(this->x * this->x + this->y * this->y + this->z * this->z);
+}
+
+struct fishbone::Vector3 fishbone::Vector3::normalize() {
+	float l = this->length();
+
+	if(l > 0) {
+		l = 1 / l;
+	} else {
+		l = 0;
+	}
+
+	return {this->x * l, this->y * l, this->z * l};
+}
+
+struct fishbone::Quaternion fishbone::Quaternion::operator+(struct fishbone::Quaternion q) const {
+	return {this->w + q.w, this->x + q.x, this->y + q.y, this->z + q.z};
+}
+
+struct fishbone::Quaternion fishbone::Quaternion::operator-(struct fishbone::Quaternion q) const {
+	return {this->w - q.w, this->x - q.x, this->y - q.y, this->z - q.z};
+}
diff --git a/engine/src/window/sdl2.cc b/engine/src/window/sdl2.cc
index 9264184..927216b 100644
--- a/engine/src/window/sdl2.cc
+++ b/engine/src/window/sdl2.cc
@@ -20,6 +20,9 @@ fishbone::Window::Window(std::string title, int width, int height) {
 	this->impl->ctx	   = SDL_GL_CreateContext(this->impl->window);
 
 	gladLoadGL();
+
+	this->width  = width;
+	this->height = height;
 }
 
 fishbone::Window::~Window() {
@@ -28,10 +31,14 @@ fishbone::Window::~Window() {
 	delete this->impl;
 }
 
-void fishbone::Window::poll(){
+void fishbone::Window::poll() {
 	SDL_Event ev;
 
-	while(SDL_PollEvent(&ev)){
+	while(SDL_PollEvent(&ev)) {
 	}
 }
+
+void fishbone::Window::swapBuffer() {
+	SDL_GL_SwapWindow(this->impl->window);
+}
 #endif