Possibility to store all resources in a well defined absolute path

src/core/util.cpp

@@ -17,6 +17,22 @@
 #include "util.h"
 #include <SDL2/SDL.h>
 
+std::string s_ResourcePath = "./res/";
+
+void Util::Init( const char *app, const char *org )
+{
+  if ( SDL_strcmp( app, "" ) != 0 )
+  {
+    char *base_path = SDL_GetPrefPath( org, app );
+
+    if ( base_path ) {
+        s_ResourcePath = SDL_strdup( base_path );
+
+        SDL_free(base_path);
+    }
+  }
+}
+
 void Util::Sleep(int milliseconds)
 {
 	SDL_Delay(milliseconds);
@@ -47,3 +63,8 @@ std::vector<std::string> Util::Split(const std::string& s, char delim)
 
     return elems;
 }
+
+std::string Util::ResourcePath( void )
+{
+  return s_ResourcePath;
+}

src/core/util.h

@@ -49,8 +49,26 @@
 
 namespace Util
 {
+  /**
+   * Initializes a directory for central resource managment.
+   * Under Linux, the path will be /home/user/.local/share/{org}/{app}/
+   * Under Windows, the path will be SYSTEMDRIVE:\\Users\\user\\AppData\\Roaming\\{org}\\{app}\\
+   * Under Mac OS X, the path will be /Users/user/Library/Application Support/{app}/
+   *
+   * If you set app as an empty string "", than old folder structure will be used.
+   *
+   * More Information on https://wiki.libsdl.org/SDL_GetPrefPath
+   *
+   * \param app Defines the name of this application
+   * \param org Defines the organization name
+   */
+  void Init( const char *app, const char *org = "3DEngineCpp" );
 	void Sleep(int milliseconds);
 	std::vector<std::string> Split(const std::string &s, char delim);
+	/**
+	 * Returns the resource path.
+	 */
+	std::string ResourcePath( void );
 };
 
 #endif

src/rendering/mesh.cpp

@@ -16,6 +16,7 @@
 
 #include "mesh.h"
 
+#include "../core/util.h"
 #include "../core/profiling.h"
 
 #include <GL/glew.h>
@@ -256,7 +257,7 @@ Mesh::Mesh(const std::string& fileName) :
 	{
 		Assimp::Importer importer;
 
-		const aiScene* scene = importer.ReadFile(("./res/models/" + fileName).c_str(), 
+		const aiScene* scene = importer.ReadFile((Util::ResourcePath() + "models/" + fileName).c_str(),
 		                                         aiProcess_Triangulate |
 		                                         aiProcess_GenSmoothNormals | 
 		                                         aiProcess_FlipUVs |

src/rendering/shader.cpp

@@ -478,7 +478,7 @@ static void CheckShaderError(int shader, int flag, bool isProgram, const std::st
 static std::string LoadShader(const std::string& fileName)
 {
 	std::ifstream file;
-	file.open(("./res/shaders/" + fileName).c_str());
+	file.open((Util::ResourcePath() + "shaders/" + fileName).c_str());
 
 	std::string output;
 	std::string line;

src/rendering/texture.cpp

@@ -16,6 +16,7 @@
 
 #include "texture.h"
 
+#include "../core/util.h"
 #include "../core/math3d.h"
 #include "../core/profiling.h"
 
@@ -177,7 +178,7 @@ Texture::Texture(const std::string& fileName, GLenum textureTarget, GLfloat filt
 	else
 	{
 		int x, y, bytesPerPixel;
-		unsigned char* data = stbi_load(("./res/textures/" + fileName).c_str(), &x, &y, &bytesPerPixel, 4);
+		unsigned char* data = stbi_load((Util::ResourcePath() + "textures/" + fileName).c_str(), &x, &y, &bytesPerPixel, 4);
 
 		if(data == NULL)
 		{

src/rendering/window.cpp

@@ -16,6 +16,7 @@
 
 #include "window.h"
 #include "../core/profiling.h"
+#include "../core/util.h"
 #include <SDL2/SDL.h>
 #include <GL/glew.h>
 
@@ -57,6 +58,11 @@ Window::Window(int width, int height, const std::string& title) :
 	{
 		fprintf(stderr, "Error: '%s'\n", glewGetErrorString(res));
 	}
+
+  Util::Init( "" );
+// Uses the relatice ./res/ folder as resource directory.
+// Use the following line to use the absolute path in your users local directory.
+//  Util::Init( title.c_str() );
 }
 
 Window::~Window()