diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..03aad69
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,80 @@
+# Created by .ignore support plugin (hsz.mobi)
+### C template
+# Prerequisites
+*.d
+
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Linker output
+*.ilk
+*.map
+*.exp
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
+*.su
+*.idb
+*.pdb
+
+# Kernel Module Compile Results
+*.mod*
+*.cmd
+.tmp_versions/
+modules.order
+Module.symvers
+Mkfile.old
+dkms.conf
+
+### CMake template
+CMakeLists.txt.user
+CMakeCache.txt
+CMakeFiles
+CMakeScripts
+Testing
+Makefile
+cmake_install.cmake
+install_manifest.txt
+compile_commands.json
+CTestTestfile.cmake
+_deps
+
+### C++ template
+
+# Compiled Object files
+*.slo
+
+# Fortran module files
+*.mod
+*.smod
+
+# Compiled Static libraries
+*.lai
+
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..2c76762
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,12 @@
+[submodule "external/googletest"]
+	path = external/googletest
+	url = https://github.com/google/googletest.git
+[submodule "external/nanogui"]
+	path = external/nanogui
+	url = https://github.com/Godzil/nanogui.git
+[submodule "external/glfw"]
+	path = external/glfw
+	url = https://github.com/glfw/glfw.git
+[submodule "external/lodepng"]
+	path = external/lodepng
+	url = https://github.com/lvandeve/lodepng
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..e69de29
diff --git a/external/cmake/GetGitRevisionDescription.cmake b/external/cmake/GetGitRevisionDescription.cmake
new file mode 100644
index 0000000..0a6cb5f
--- /dev/null
+++ b/external/cmake/GetGitRevisionDescription.cmake
@@ -0,0 +1,168 @@
+# - Returns a version string from Git
+#
+# These functions force a re-configure on each git commit so that you can
+# trust the values of the variables in your build system.
+#
+#  get_git_head_revision(<refspecvar> <hashvar> [<additional arguments to git describe> ...])
+#
+# Returns the refspec and sha hash of the current head revision
+#
+#  git_describe(<var> [<additional arguments to git describe> ...])
+#
+# Returns the results of git describe on the source tree, and adjusting
+# the output so that it tests false if an error occurs.
+#
+#  git_get_exact_tag(<var> [<additional arguments to git describe> ...])
+#
+# Returns the results of git describe --exact-match on the source tree,
+# and adjusting the output so that it tests false if there was no exact
+# matching tag.
+#
+#  git_local_changes(<var>)
+#
+# Returns either "CLEAN" or "DIRTY" with respect to uncommitted changes.
+# Uses the return code of "git diff-index --quiet HEAD --".
+# Does not regard untracked files.
+#
+# Requires CMake 2.6 or newer (uses the 'function' command)
+#
+# Original Author:
+# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
+# http://academic.cleardefinition.com
+# Iowa State University HCI Graduate Program/VRAC
+#
+# Copyright Iowa State University 2009-2010.
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+if(__get_git_revision_description)
+    return()
+endif()
+set(__get_git_revision_description YES)
+
+# We must run the following at "include" time, not at function call time,
+# to find the path to this module rather than the path to a calling list file
+get_filename_component(_gitdescmoddir ${CMAKE_CURRENT_LIST_FILE} PATH)
+
+function(get_git_head_revision _refspecvar _hashvar)
+    set(GIT_PARENT_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
+    set(GIT_DIR "${GIT_PARENT_DIR}/.git")
+    while(NOT EXISTS "${GIT_DIR}")	# .git dir not found, search parent directories
+        set(GIT_PREVIOUS_PARENT "${GIT_PARENT_DIR}")
+        get_filename_component(GIT_PARENT_DIR ${GIT_PARENT_DIR} PATH)
+        if(GIT_PARENT_DIR STREQUAL GIT_PREVIOUS_PARENT)
+            # We have reached the root directory, we are not in git
+            set(${_refspecvar} "GITDIR-NOTFOUND" PARENT_SCOPE)
+            set(${_hashvar} "GITDIR-NOTFOUND" PARENT_SCOPE)
+            return()
+        endif()
+        set(GIT_DIR "${GIT_PARENT_DIR}/.git")
+    endwhile()
+    # check if this is a submodule
+    if(NOT IS_DIRECTORY ${GIT_DIR})
+        file(READ ${GIT_DIR} submodule)
+        string(REGEX REPLACE "gitdir: (.*)\n$" "\\1" GIT_DIR_RELATIVE ${submodule})
+        get_filename_component(SUBMODULE_DIR ${GIT_DIR} PATH)
+        get_filename_component(GIT_DIR ${SUBMODULE_DIR}/${GIT_DIR_RELATIVE} ABSOLUTE)
+    endif()
+    set(GIT_DATA "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/git-data")
+    if(NOT EXISTS "${GIT_DATA}")
+        file(MAKE_DIRECTORY "${GIT_DATA}")
+    endif()
+
+    if(NOT EXISTS "${GIT_DIR}/HEAD")
+        return()
+    endif()
+    set(HEAD_FILE "${GIT_DATA}/HEAD")
+    configure_file("${GIT_DIR}/HEAD" "${HEAD_FILE}" COPYONLY)
+
+    configure_file("${_gitdescmoddir}/GetGitRevisionDescription.cmake.in"
+            "${GIT_DATA}/grabRef.cmake"
+            @ONLY)
+    include("${GIT_DATA}/grabRef.cmake")
+
+    set(${_refspecvar} "${HEAD_REF}" PARENT_SCOPE)
+    set(${_hashvar} "${HEAD_HASH}" PARENT_SCOPE)
+endfunction()
+
+function(git_describe _var)
+    if(NOT GIT_FOUND)
+        find_package(Git QUIET)
+    endif()
+    get_git_head_revision(refspec hash)
+    if(NOT GIT_FOUND)
+        set(${_var} "GIT-NOTFOUND" PARENT_SCOPE)
+        return()
+    endif()
+    if(NOT hash)
+        set(${_var} "HEAD-HASH-NOTFOUND" PARENT_SCOPE)
+        return()
+    endif()
+
+    # TODO sanitize
+    #if((${ARGN}" MATCHES "&&") OR
+    #	(ARGN MATCHES "||") OR
+    #	(ARGN MATCHES "\\;"))
+    #	message("Please report the following error to the project!")
+    #	message(FATAL_ERROR "Looks like someone's doing something nefarious with git_describe! Passed arguments ${ARGN}")
+    #endif()
+
+    #message(STATUS "Arguments to execute_process: ${ARGN}")
+
+    execute_process(COMMAND
+            "${GIT_EXECUTABLE}"
+            describe
+            #${hash}
+            ${ARGN}
+            WORKING_DIRECTORY
+            "${CMAKE_CURRENT_SOURCE_DIR}"
+            RESULT_VARIABLE
+            res
+            OUTPUT_VARIABLE
+            out
+            ERROR_QUIET
+            OUTPUT_STRIP_TRAILING_WHITESPACE)
+    if(NOT res EQUAL 0)
+        set(out "${out}-${res}-NOTFOUND")
+    endif()
+
+    set(${_var} "${out}" PARENT_SCOPE)
+endfunction()
+
+function(git_get_exact_tag _var)
+    git_describe(out --exact-match ${ARGN})
+    set(${_var} "${out}" PARENT_SCOPE)
+endfunction()
+
+function(git_local_changes _var)
+    if(NOT GIT_FOUND)
+        find_package(Git QUIET)
+    endif()
+    get_git_head_revision(refspec hash)
+    if(NOT GIT_FOUND)
+        set(${_var} "GIT-NOTFOUND" PARENT_SCOPE)
+        return()
+    endif()
+    if(NOT hash)
+        set(${_var} "HEAD-HASH-NOTFOUND" PARENT_SCOPE)
+        return()
+    endif()
+
+    execute_process(COMMAND
+            "${GIT_EXECUTABLE}"
+            diff-index --quiet HEAD --
+            WORKING_DIRECTORY
+            "${CMAKE_CURRENT_SOURCE_DIR}"
+            RESULT_VARIABLE
+            res
+            OUTPUT_VARIABLE
+            out
+            ERROR_QUIET
+            OUTPUT_STRIP_TRAILING_WHITESPACE)
+    if(res EQUAL 0)
+        set(${_var} "CLEAN" PARENT_SCOPE)
+    else()
+        set(${_var} "DIRTY" PARENT_SCOPE)
+    endif()
+endfunction()
diff --git a/external/cmake/GetGitRevisionDescription.cmake.in b/external/cmake/GetGitRevisionDescription.cmake.in
new file mode 100644
index 0000000..6d8b708
--- /dev/null
+++ b/external/cmake/GetGitRevisionDescription.cmake.in
@@ -0,0 +1,41 @@
+#
+# Internal file for GetGitRevisionDescription.cmake
+#
+# Requires CMake 2.6 or newer (uses the 'function' command)
+#
+# Original Author:
+# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
+# http://academic.cleardefinition.com
+# Iowa State University HCI Graduate Program/VRAC
+#
+# Copyright Iowa State University 2009-2010.
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+set(HEAD_HASH)
+
+file(READ "@HEAD_FILE@" HEAD_CONTENTS LIMIT 1024)
+
+string(STRIP "${HEAD_CONTENTS}" HEAD_CONTENTS)
+if(HEAD_CONTENTS MATCHES "ref")
+	# named branch
+	string(REPLACE "ref: " "" HEAD_REF "${HEAD_CONTENTS}")
+	if(EXISTS "@GIT_DIR@/${HEAD_REF}")
+		configure_file("@GIT_DIR@/${HEAD_REF}" "@GIT_DATA@/head-ref" COPYONLY)
+	else()
+		configure_file("@GIT_DIR@/packed-refs" "@GIT_DATA@/packed-refs" COPYONLY)
+		file(READ "@GIT_DATA@/packed-refs" PACKED_REFS)
+		if(${PACKED_REFS} MATCHES "([0-9a-z]*) ${HEAD_REF}")
+			set(HEAD_HASH "${CMAKE_MATCH_1}")
+		endif()
+	endif()
+else()
+	# detached HEAD
+	configure_file("@GIT_DIR@/HEAD" "@GIT_DATA@/head-ref" COPYONLY)
+endif()
+
+if(NOT HEAD_HASH)
+	file(READ "@GIT_DATA@/head-ref" HEAD_HASH LIMIT 1024)
+	string(STRIP "${HEAD_HASH}" HEAD_HASH)
+endif()
diff --git a/external/glfw b/external/glfw
new file mode 160000
index 0000000..76406c7
--- /dev/null
+++ b/external/glfw
@@ -0,0 +1 @@
+Subproject commit 76406c7894912125afae59e6e5be00222ba10b48
diff --git a/external/googletest b/external/googletest
new file mode 160000
index 0000000..41b5f14
--- /dev/null
+++ b/external/googletest
@@ -0,0 +1 @@
+Subproject commit 41b5f149ab306e96b5b2faf523505d75acffd98a
diff --git a/external/lodepng b/external/lodepng
new file mode 160000
index 0000000..5a0dba1
--- /dev/null
+++ b/external/lodepng
@@ -0,0 +1 @@
+Subproject commit 5a0dba103893e6b8084be13945a826663917d00a
diff --git a/external/nanogui b/external/nanogui
new file mode 160000
index 0000000..16bc6b1
--- /dev/null
+++ b/external/nanogui
@@ -0,0 +1 @@
+Subproject commit 16bc6b1d3ac565f9d96889040c8fd9e6ad4a1a16