diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..468d90c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*build*/
diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/.name b/.idea/.name
new file mode 100644
index 0000000..e2e962e
--- /dev/null
+++ b/.idea/.name
@@ -0,0 +1 @@
+vector
\ No newline at end of file
diff --git a/.idea/Vector.iml b/.idea/Vector.iml
new file mode 100644
index 0000000..f08604b
--- /dev/null
+++ b/.idea/Vector.iml
@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module classpath="CMake" type="CPP_MODULE" version="4" />
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..0b76fe5
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CMakePythonSetting">
+    <option name="pythonIntegrationState" value="YES" />
+  </component>
+  <component name="CMakeWorkspace" PROJECT_DIR="$PROJECT_DIR$" />
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..e689a51
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/Vector.iml" filepath="$PROJECT_DIR$/.idea/Vector.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.kdev4/Vector.kdev4 b/.kdev4/Vector.kdev4
new file mode 100644
index 0000000..e022c60
--- /dev/null
+++ b/.kdev4/Vector.kdev4
@@ -0,0 +1,19 @@
+[Buildset]
+BuildItems=@Variant(\x00\x00\x00\t\x00\x00\x00\x00\x01\x00\x00\x00\x0b\x00\x00\x00\x00\x01\x00\x00\x00\x0c\x00V\x00e\x00c\x00t\x00o\x00r)
+
+[CMake]
+Build Directory Count=1
+Current Build Directory Index-Host-System=0
+
+[CMake][CMake Build Directory 0]
+Build Directory Path=/home/nb/projects/Vector/build
+Build Type=Debug
+CMake Binary=/usr/bin/cmake
+CMake Executable=/usr/bin/cmake
+Environment Profile=
+Extra Arguments=
+Install Directory=/usr/local
+Runtime=Host-System
+
+[Project]
+VersionControlSupport=kdevgit
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ad0d5bf..036e57d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,34 @@
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.15..3.30)
 
-project(vector)
+project(vector
+    VERSION 0.1
+    LANGUAGES CXX)
 
-add_executable(vector main.cpp)
+if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
+    set_property(GLOBAL PROPERTY USE_FOLDERDS ON)
+    find_package(Doxygen)
+    if(Doxygen_FOUND)
+        #add_subdirectory(docs)
+    else()
+        message(STATUS "Doxygen not found, not building docs")
+    endif()
 
-install(TARGETS vector RUNTIME DESTINATION bin)
+    add_subdirectory(apps/)
+
+endif()
+
+include(FetchContent)
+
+# Formatting library, adds fmt::fmt Always use the full git hash, not the tag,
+# safer and faster to recompile
+#FetchContent_Declare(
+#  fmtlib
+#  GIT_REPOSITORY https://github.com/fmtlib/fmt.git
+#  GIT_TAG 8.0.1)
+#FetchContent_MakeAvailable(fmtlib)
+
+add_subdirectory(${PROJECT_SOURCE_DIR}/src)
+
+#add_executable(vector main.cpp)
+
+#install(TARGETS vector RUNTIME DESTINATION bin)
diff --git a/apps/CMakeLists.txt b/apps/CMakeLists.txt
new file mode 100644
index 0000000..5945e25
--- /dev/null
+++ b/apps/CMakeLists.txt
@@ -0,0 +1,3 @@
+add_executable(app main.cpp)
+
+target_link_libraries(app PRIVATE vector)
diff --git a/apps/main.cpp b/apps/main.cpp
new file mode 100644
index 0000000..4512149
--- /dev/null
+++ b/apps/main.cpp
@@ -0,0 +1,25 @@
+#include <iostream>
+#include "Vector/vector3.h"
+
+int main(int argc, char **argv) {
+    std::cout << "Hello, world!" << std::endl;
+    Vector::Vector3 vec(1,2,3);
+    Vector::Vector3 vec2(2,1,3);
+    std::cout<<vec<<std::endl;
+    std::cout<<vec.len()<<std::endl;
+    vec*=2;
+    std::cout<<vec<<std::endl;
+    std::cout<<vec.len()<<std::endl;
+    vec/=2;
+    std::cout<<vec<<std::endl;
+    std::cout<<vec.len()<<std::endl;
+    std::cout<<vec.dot(vec)<<std::endl;
+    std::cout<<vec.cross(vec2)<<std::endl;
+    vec.norm();
+    std::cout<<vec<<std::endl;
+    std::cout<<vec.len()<<std::endl;
+    vec-=vec;
+    std::cout<<vec<<std::endl;
+    std::cout<<vec.len()<<std::endl;
+    return 0;
+}
diff --git a/include/Vector/vector3.h b/include/Vector/vector3.h
new file mode 100644
index 0000000..4484d62
--- /dev/null
+++ b/include/Vector/vector3.h
@@ -0,0 +1,65 @@
+//
+// Created by nb on 07.07.24.
+//
+
+#ifndef VECTOR_VECTOR3_H
+#define VECTOR_VECTOR3_H
+
+#include "iostream"
+#include <cmath>
+
+namespace Vector{
+    class Vector3{
+    public:
+        Vector3(double x,double y, double z):x(x),y(y),z(z){};
+        Vector3(): Vector3(0,0,0){};
+
+        virtual ~Vector3() = default;
+
+        Vector3 operator+(const Vector3& v) const;
+
+        Vector3 operator-(const Vector3& v) const{
+            Vector3 tmp=v*-1;
+            return *this+tmp;
+        };
+
+        Vector3 operator*(double s) const;
+
+        Vector3 operator/(double s) const{
+            return *this*(1/s);
+        };
+
+        Vector3& operator*=(double s);
+
+        Vector3& operator/=(double s){
+            return *this*=(1/s);
+        };
+
+        Vector3& operator+=(const Vector3& v);
+
+        Vector3& operator-=(const Vector3& v);
+
+        Vector3& operator=(const Vector3& v);
+
+
+
+        Vector3& norm();
+
+        double dot(const Vector3& v) const;
+
+        double len() const;
+
+        Vector3 cross(const Vector3& v) const;
+
+        friend std::ostream& operator<<(std::ostream& os, const Vector3& v){
+            os<<"{"<<v.x<<", "<<v.y<<", "<<v.z<<"}";
+            return os;
+        }
+
+    private:
+        double x,y,z;
+    };
+
+}
+
+#endif //VECTOR_VECTOR3_H
diff --git a/main.cpp b/main.cpp
deleted file mode 100644
index 8bb47f1..0000000
--- a/main.cpp
+++ /dev/null
@@ -1,6 +0,0 @@
-#include <iostream>
-
-int main(int argc, char **argv) {
-    std::cout << "Hello, world!" << std::endl;
-    return 0;
-}
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
new file mode 100644
index 0000000..b70a2f6
--- /dev/null
+++ b/src/CMakeLists.txt
@@ -0,0 +1,10 @@
+file(GLOB HEADER_LIST CONFIGURE_DEPENDS "${ModernCMakeExample_SOURCE_DIR}/include/Vector/*.hpp")
+
+add_library(vector vector3.cpp ${HEADER_LIST})
+
+target_include_directories(vector PUBLIC "../include")
+
+source_group(
+    TREE "${PROJECT_SOURCE_DIR}/include"
+    PREFIX "Header files"
+    FILES ${HEADER_LIST})
diff --git a/src/vector3.cpp b/src/vector3.cpp
new file mode 100644
index 0000000..7b7b7b1
--- /dev/null
+++ b/src/vector3.cpp
@@ -0,0 +1,45 @@
+#include "Vector/vector3.h"
+
+namespace Vector{
+    Vector3 Vector3::operator+(const Vector::Vector3 &v) const {
+        return {x+v.x,y+v.y,z+v.z};
+    }
+
+    Vector3& Vector3::operator=(const Vector::Vector3 &v) = default;
+
+    Vector3& Vector3::operator+=(const Vector::Vector3 &v) {
+        *this=*this+v;
+        return *this;
+    }
+
+    double Vector3::dot(const Vector::Vector3 &v) const {
+        return x*v.x+y*v.y+z*v.z;
+    }
+
+    Vector3 Vector3::cross(const Vector::Vector3& v) const {
+        return {y*v.z-v.y*z,z*v.x-v.z*x,x*v.y-v.x*y};
+    }
+
+    double Vector3::len() const {
+        return std::sqrt(x*x+y*y+z*z);
+    }
+
+    Vector3 Vector3::operator*(double s) const {
+        return {x*s, y*s, z*s};
+    }
+
+    Vector3& Vector3::operator*=(double s) {
+        *this=*this*s;
+        return *this;
+    }
+
+    Vector3 &Vector3::operator-=(const Vector::Vector3 &v) {
+        *this=*this-v;
+        return *this;
+    }
+
+    Vector3 &Vector3::norm() {
+        *this=*this/=this->len();
+        return *this;
+    }
+}
\ No newline at end of file