Moved shaders to standalone source file

source/app/src/App.cpp

@@ -47,16 +47,7 @@ App::App():
     if(glewInit() != GLEW_OK) {
         error_callback_s(GLFW_NO_ERROR, "glewInit() failed");
     }
-}
 
-
-App::~App() {
-    glfwTerminate();
-    glfwSetErrorCallback(NULL);
-}
-
-
-void App::game_loop() {
     float vertices[] = {
         .0f, .5f, 1.f, 0.f, 0.f,
         .5f, -.5f, 0.f, 1.f, 0.f,
@@ -67,25 +58,10 @@ void App::game_loop() {
     glGenBuffers(1, &vbo);
     glBindBuffer(GL_ARRAY_BUFFER, vbo);
     glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
-    
-    auto vertexSource = R"glsl(
-        #version 150 core
-        in vec2 position;
-        in vec3 color;
-        out vec3 _color;
-        void main() { _color = color; gl_Position = vec4(position, 0.0, 1.0); }
-    )glsl";
-
-    auto fragmentSource = R"glsl(
-        #version 150 core
-        in vec3 _color;
-        out vec4 color;
-        void main() { color = vec4(_color, 1.0); }
-    )glsl";
 
     GLuint shaderProgram = ugly::ShaderProgramBuilder{}
-        .attachFromMemory(GL_VERTEX_SHADER, vertexSource)
-        .attachFromMemory(GL_FRAGMENT_SHADER, fragmentSource)
+        .attachFromFile(GL_VERTEX_SHADER, "assets/shaders/shader.vert")
+        .attachFromFile(GL_FRAGMENT_SHADER, "assets/shaders/shader.frag")
         .link();
     glUseProgram(shaderProgram);
 
@@ -96,7 +72,16 @@ void App::game_loop() {
     glEnableVertexAttribArray(0);
     glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 5*sizeof(float), (void*)(2*sizeof(float)));
     glEnableVertexAttribArray(1);
+}
 
+
+App::~App() {
+    glfwTerminate();
+    glfwSetErrorCallback(NULL);
+}
+
+
+void App::game_loop() {
     while(!glfwWindowShouldClose(mpWindow)) {
         glfwPollEvents();