Add CMake/powershell scripts to compile on windows

.gitignore

@@ -7,3 +7,5 @@ blends/**
 *3d-game-shaders-for-beginners*
 !blends/*
 !blends/mill-scene/mill-scene-low-poly-backup.blend
+demonstration/build/*
+*.exe

demonstration/CMakeLists.txt

@@ -0,0 +1,22 @@
+cmake_minimum_required(VERSION 3.10)
+project(3DGameShadersForBeginners LANGUAGES C CXX)
+
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED true)
+
+add_executable(3d-game-shaders src/main.cxx)
+find_package(Python3 REQUIRED)
+set(PandaPath "C:\\Panda3D-1.10.15-x64" CACHE STRING "Path to the root of panda sdk")
+list(APPEND LIBRARIES
+    libp3framework
+    libpanda
+    libpandafx
+    libpandaexpress
+    libpandaphysics
+    libp3dtoolconfig
+    libp3dtool
+)
+target_link_directories(3d-game-shaders PRIVATE "${PandaPath}/lib")
+target_include_directories(3d-game-shaders PRIVATE "${PandaPath}/include")
+target_link_libraries(3d-game-shaders PRIVATE ${LIBRARIES})
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})

demonstration/build-for-windows.ps1

@@ -0,0 +1,65 @@
+function BuildExe() {
+    # Configure CMake
+    cmake . -B build
+    # Build the file in release mode
+    $result = (cmake --build build --config Release )
+    Write-Output $result
+    if($result -eq 0) {
+        Write-Error "An error occurred when building the project file! Check logs for more details."
+    }
+    return $result
+}
+
+function CopyExe() {
+    # Copies the exe file to the workspace root
+    Copy-Item "./build/Release/3d-game-shaders.exe" "./"
+}
+
+$changeCache = (Test-Path "build/cache.json") ? (Get-Content "build/cache.json" | ConvertFrom-Json -AsHashTable) : @{}
+
+function GetFileHash {
+    param(
+        $file
+    )
+    return (Get-FileHash "$file" -Algorithm SHA256).Hash
+}
+
+function SetFileHash {
+    param (
+        $file
+    )
+    $changeCache["$file"] = GetFileHash($file)
+}
+
+function CheckDiff {
+    param ($file)
+    return ((GetFileHash($file)) -eq ($changeCache["$file"]))
+}
+
+function MakeCache {
+    if(Test-Path "build/cache.json") {
+        Clear-Content "build/cache.json"
+    }
+    SetFileHash("CMakeLists.txt")
+    SetFileHash("src/main.cxx")
+    Set-Content -Path "build/cache.json" -Value ($changeCache | ConvertTo-Json)
+}
+
+$firstTime = 0
+
+# Create a build directory
+if(-not(Test-Path ./build)) {
+    mkdir ./build > $null
+    $firstTime = 1
+}
+
+# If CMakeLists.txt or main.cxx is changed, rebuild the executable and copy it to the root directory
+if($firstTime -or -not(CheckDiff("src/main.cxx") -and CheckDiff("CMakeLists.txt"))) {
+    Write-Output "Building exe file..."
+    if(buildExe -eq 0) {
+        Write-Output "Copying exe file..."
+        copyExe
+        MakeCache
+    }
+    Write-Output "Build script finished executing!"
+}

demonstration/src/main.cxx

@@ -4,7 +4,6 @@
 */
 
 #include <thread>
-#include <unistd.h>
 #include <random>
 #include <string>
 #include <chrono>