diff --git a/.gitignore b/.gitignore
index 3569aab..f15149d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -375,3 +375,6 @@ FodyWeavers.xsd
 /x64/Debug/SQCSim2021.pdb
 /SQCSim-srv/cmake/*
 !/SQCSim-srv/cmake/CMakeLists.txt
+/SQCSim2021/cmake/*
+!/SQCSim2021/cmake/CMakeLists.txt
+/SQCSim2021/SQCSim-client
diff --git a/SQCSim-common/world.cpp b/SQCSim-common/world.cpp
index 4d7c292..1be12e7 100644
--- a/SQCSim-common/world.cpp
+++ b/SQCSim-common/world.cpp
@@ -130,7 +130,7 @@ void World::GetScope(unsigned int& x, unsigned int& y) {
 	y = m_center[1];
 }
 
-void World::Update(Bullet* bullets[MAX_BULLETS], Vector3f& player_pos, BlockInfo* blockinfo[BTYPE_LAST]) {
+void World::Update(Bullet* bullets[MAX_BULLETS], const Vector3f& player_pos, BlockInfo* blockinfo[BTYPE_LAST]) {
 	UpdateWorld(player_pos, blockinfo);
 	//TransposeWorld(player_pos, bullets);
 }
@@ -407,4 +407,4 @@ void World::UpdateWorld(const Vector3f& player, BlockInfo* blockinfo[BTYPE_LAST]
 	}*/
 }
 
-int World::GettbDeleted() const { return m_tbDeleted.size(); }
\ No newline at end of file
+int World::GettbDeleted() const { return m_tbDeleted.size(); }
diff --git a/SQCSim-common/world.h b/SQCSim-common/world.h
index d341ee8..0cc628d 100644
--- a/SQCSim-common/world.h
+++ b/SQCSim-common/world.h
@@ -30,7 +30,7 @@ public:
 	BlockType BlockAt(float x, float y, float z, BlockType defaultBlockType = BTYPE_AIR) const;
 	BlockType BlockAt(const Vector3f& pos, BlockType defaultBlockType = BTYPE_AIR) const;
 
-	void Update(Bullet* bullets[MAX_BULLETS], Vector3f& player_pos, BlockInfo* blockinfo[BTYPE_LAST]);
+	void Update(Bullet* bullets[MAX_BULLETS], const Vector3f& player_pos, BlockInfo* blockinfo[BTYPE_LAST]);
 
 	void GetScope(unsigned int& x, unsigned int& y);
 
diff --git a/SQCSim2021/audio.h b/SQCSim2021/audio.h
index b0ff044..d4625cf 100644
--- a/SQCSim2021/audio.h
+++ b/SQCSim2021/audio.h
@@ -1,8 +1,14 @@
 #ifndef AUDIO_H__
 #define AUDIO_H__
 
+#ifdef _WIN32
 #include <irrKlang.h>
 #include <ik_ISoundSource.h>
+#else
+#include "./external/irrKlang-64bit-1.6.0/include/irrKlang.h"
+#include "./external/irrKlang-64bit-1.6.0/include/ik_ISoundSource.h"
+#endif
+
 #include "../SQCSim-common/vector3.h"
 #include "define.h"
 
@@ -29,4 +35,4 @@ public:
 	void PauseEngine();
 };
 
-#endif // AUDIO_H__
\ No newline at end of file
+#endif // AUDIO_H__
diff --git a/SQCSim2021/cmake/CMakeLists.txt b/SQCSim2021/cmake/CMakeLists.txt
index 02c5332..fbe850f 100644
--- a/SQCSim2021/cmake/CMakeLists.txt
+++ b/SQCSim2021/cmake/CMakeLists.txt
@@ -6,9 +6,26 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_STANDARD_REQUIRED True)
 
 set(CMAKE_BUILD_DIRECTORY "./build")
-set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "../out")
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "../")
 
 set(SQCSIM_COMMON_DIR "../../SQCSim-common/")
+set(SQCSIM_EXTERN_DIR "../external/")
+
+find_package(SFML COMPONENTS system window graphics REQUIRED)
+find_package(DevIL REQUIRED)
+find_package(OpenGL REQUIRED)
+find_package(GLEW REQUIRED)
+
+find_library(IRRKLANG_LIBRARY
+	NAMES libIrrKlang.so
+	PATHS "${SQCSIM_EXTERN_DIR}/irrKlang-64bit-1.6.0/lib/linux-gcc-64/")
+
+include_directories(
+	${SQCSIM_EXTERN_DIR}/irrKlang-64bit-1.6.0/include/
+			${SFML_INCLUDE_DIRS}
+			${IL_INCLUDE_DIR}
+			)
+
 
 add_library(SQCSim-common
 			"${SQCSIM_COMMON_DIR}blockinfo.cpp"
@@ -21,7 +38,7 @@ add_library(SQCSim-common
 			"${SQCSIM_COMMON_DIR}world.cpp"
 )
 
-add_executable(SQCSim-server
+add_executable(SQCSim-client
 			"../audio.cpp"
 			"../connector.cpp"
 			"../engine.cpp"
@@ -30,10 +47,22 @@ add_executable(SQCSim-server
 			"../shader.cpp"
 			"../skybox.cpp"
 			"../texture.cpp"
+			"../textureatlas.cpp"
 			"../tool.cpp"
 			"../vertexbuffer.cpp"
 			"../worldrenderer.cpp"
 			"../main.cpp"
 			)
 
-target_link_libraries(SQCSim-server PUBLIC SQCSim-common)
+target_link_libraries(SQCSim-client PUBLIC SQCSim-common
+			${IRRKLANG_LIBRARY}
+			sfml-system
+			sfml-window
+			sfml-graphics
+			GL
+			GLU
+			GLEW
+			${IL_LIBRARIES}
+			${ILU_LIBRARIES}
+			)
+
diff --git a/SQCSim2021/define.h b/SQCSim2021/define.h
index 8d51188..02e5faf 100644
--- a/SQCSim2021/define.h
+++ b/SQCSim2021/define.h
@@ -4,14 +4,18 @@
 #include <iostream>
 #include <chrono>
 #include <iomanip>
+#include <GL/glew.h>
 #include <SFML/Window.hpp>
 #include <SFML/Graphics.hpp>
 #include "../SQCSim-common/define.h"
 
 #ifdef _WIN32
-#include <GL/glew.h>
 #include <gl/GL.h>
 #include <gl/GLU.h>
+#else
+#include <GL/gl.h>
+#include <GL/glu.h>
+#include <climits>
 #endif
 
 #define NETWORK_TEST false
diff --git a/SQCSim2021/media/shaders/shader01.frag b/SQCSim2021/media/shaders/shader01.frag
index 38588d0..8adf697 100644
--- a/SQCSim2021/media/shaders/shader01.frag
+++ b/SQCSim2021/media/shaders/shader01.frag
@@ -7,7 +7,7 @@ void main()
     texel = texture2D(tex,gl_TexCoord[0].st);
 
     texel *= light;
-   texel.a = 255;
+   texel.a = 255.;
     gl_FragColor = texel;
    
 }