incomplete basic variant of the GLApp class

CMakeLists.txt

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.2)
 project(glTest)
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -DGLEW_STATIC -O0 -g")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -O3 -g")
 set(CMAKE_BUILD_TYPE DEBUG)
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/bin)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/Modules/")
@@ -11,14 +11,7 @@ if(APPLE)
 	set(OPENGL_LIBRARIES ${OPENGL_FRAMEWORK})
 else()
 	find_package(OpenGL REQUIRED)
-	find_library(x11 NAMES X11)
+	set(OPENGL_LIBRARIES ${OPENGL_LIBRARIES})
-	find_library(xrandr NAMES Xrandr)
-	find_library(xi NAMES Xi)
-	find_library(xxf86vm NAMES Xxf86vm)
-	find_library(pthread NAMES pthread)
-	find_library(Xinerama NAMES Xinerama)
-	find_library(Xcursor NAMES Xcursor)
-	set(OPENGL_LIBRARIES rt asound ${OPENGL_LIBRARIES} ${x11} ${xrandr} ${xi} ${xxf86vm} ${Xinerama} ${Xcursor} ${pthread})
 endif()
 
 find_package(PkgConfig REQUIRED)

src/Camera.cpp

@@ -12,7 +12,7 @@ Camera *Camera::instance() {
     return &camera;
 }
 
-void Camera::storeUniformVars() {
+void Camera::storeUniformVars() const {
 //    GLint view = glGetUniformLocation(program, "mView");
 //    glUniformMatrix4fv(view, 1, GL_FALSE, glm::value_ptr(mView));
 //    GLint projection = glGetUniformLocation(program, "mProjection");

src/Camera.h

@@ -11,9 +11,9 @@ private:
 
 private:
     Camera();
-    Camera(Camera&) = delete;
+    Camera(const Camera&) = delete;
-    void operator=(Camera&) = delete;
+    void operator=(const Camera&) = delete;
-    void storeUniformVars();
+    void storeUniformVars() const;
 
 public:
     static Camera* instance();

src/GLApp.cpp

@@ -0,0 +1,58 @@
+#include "GLApp.h"
+#include <GL/glew.h>
+
+#include <iostream>
+
+bool wired = false;
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
+{
+	if (key == GLFW_KEY_M && action == GLFW_PRESS) {
+		glPolygonMode(GL_FRONT_AND_BACK, wired ? GL_FILL : GL_LINE);
+		wired = !wired;
+	}
+}
+
+GLApp::GLApp() {
+
+}
+
+GLApp *GLApp::instance() {
+	static GLApp app;
+	return &app;
+}
+
+void GLApp::updateFpsCounter() const {
+	static double previous_seconds = glfwGetTime ();
+	static int frame_count;
+	double current_seconds = glfwGetTime ();
+	double elapsed_seconds = current_seconds - previous_seconds;
+	if (elapsed_seconds > 0.25) {
+		previous_seconds = current_seconds;
+		double fps = (double)frame_count / elapsed_seconds;
+		char tmp[128];
+		sprintf (tmp, "opengl @ fps: %.2f", fps);
+		glfwSetWindowTitle (_window, tmp);
+		frame_count = 0;
+	}
+	frame_count++;
+}
+
+void GLApp::init() {
+	glfwInit();
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
+	glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
+	glfwWindowHint (GLFW_SAMPLES, 4);
+
+	_window = glfwCreateWindow(1024, 1024, "OpenGL", nullptr, nullptr); // Windowed
+	glfwMakeContextCurrent(_window);
+	glfwSetKeyCallback(_window, key_callback);
+
+	glewExperimental = GL_TRUE;
+	GLenum err = glewInit();
+	if(err != GLEW_OK) {
+		std::cout << "GLEW error: " << err << ": " << glewGetErrorString(err) << std::endl;
+	}
+}

src/GLApp.h

@@ -0,0 +1,22 @@
+#ifndef GLTEST_GLAPP_H
+#define GLTEST_GLAPP_H
+
+#include <GLFW/glfw3.h>
+
+class GLApp {
+private:
+	GLFWwindow* _window;
+
+private:
+	GLApp();
+	GLApp(const GLApp&) = delete;
+	void operator=(const GLApp&) = delete;
+	void updateFpsCounter() const;
+
+public:
+	static GLApp* instance();
+	void init();
+};
+
+
+#endif //GLTEST_GLAPP_H

src/main.cpp

@@ -13,7 +13,7 @@
 
 glm::vec3 eye(0.0f, 0.0f, 4.0f), at(0.0f, 0.0f, 0.0f), up(0.0f, 1.0f, 0.0f);
 glm::mat4 mView = glm::lookAt(eye, at, up);
-glm::mat4 mProjection = glm::perspective(45.0f, 1.0f, 2.0f, -2.0f);
+glm::mat4 mProjection = glm::perspective(45.0f, 1.0f, -2.0f, 2.0f); //glm::perspective(45.0f, 1.0f, 2.0f, -2.0f);
 bool wired = false;
 
 void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
@@ -77,7 +77,7 @@ int main() {
 	glDepthFunc(GL_LEQUAL);
 	glEnable(GL_DEPTH_TEST);
 
-	AudioPlayer player("/Users/selim/Dropbox/euphoria.wav");
+	AudioPlayer player("/home/selim/dl/euphoria.wav");
 	player.setStreamListener([&mesh](void* data, std::size_t framesCount){
 		mesh.addLine((float*)data);
 	});