Nove repo opengl-learning

lessons/1. Getting started/2. Hello window/Makefile

@@ -0,0 +1,33 @@
+NAME := main
+CXX=g++
+DEBUG := 
+CXX_FLAGS := $(DEBUG) -std=c++14
+LIBS := -lGL -lGLU -lglfw3 -lX11 -lXxf86vm -lXrandr -pthread -lXi -ldl -lm
+INCLUDE := ../../../include/
+BIN := bin
+SRC := src
+INPUT = src/main.cpp ../../../glad.c
+
+all: $(BIN)/$(NAME)
+
+run:
+	./$(BIN)/$(NAME)
+
+$(BIN)/$(NAME): $(SRC)/main.o $(SRC)/glad.o
+	$(CXX) $(CXX_FLAGS) -I$(INCLUDE) $^ -o $@ $(LIBS)
+
+.cpp.o:
+	$(CXX) $(CXX_FLAGS) -I$(INCLUDE) -c $< -o $@
+
+.c.o:
+	$(CXX) $(CXX_FLAGS) -I$(INCLUDE) -c $< -o $@
+
+$(SRC)/glad.o: ../../../glad.c
+	$(CXX) $(CXX_FLAGS) -I$(INCLUDE) -c $< -o $@
+
+# dependencies
+$(SRC)/main.o: $(SRC)/main.cpp
+
+clean:
+	rm -rf $(SRC)/*.o	
+	touch $(SRC)/*

lessons/1. Getting started/2. Hello window/src/main.cpp

@@ -0,0 +1,75 @@
+#include <glad/glad.h>
+#include <GLFW/glfw3.h>
+#include <iostream>
+
+using namespace std;
+
+// Global Constants
+const int WINDOW_WIDTH = 800;
+const int WINDOW_HEIGHT = 600;
+// Globals
+GLFWwindow* window;
+
+uint8_t init(void);
+void framebuffersize_callback(GLFWwindow* window, int width, int height);
+void freeAll(void);
+void proccessInput(GLFWwindow* window);
+
+int main(int argc, char** argv)
+{
+	if (init() != 0)
+		return -1;
+
+	// MAIN loop
+	while (!glfwWindowShouldClose(window)) {
+		// input ...
+		proccessInput(window);
+
+		// rendering commands here ...
+		glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+		glClear(GL_COLOR_BUFFER_BIT);
+
+		// check and calls events and swap the buffers
+		glfwSwapBuffers(window);
+		glfwPollEvents();
+	}
+
+	freeAll();
+	return 0;
+}
+
+uint8_t init(void) {
+	// init of glfw window
+	glfwInit();
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+	window = glfwCreateWindow(WINDOW_WIDTH, WINDOW_HEIGHT, "Hello Window!", NULL, NULL);
+	if (window == NULL) {
+		cerr << "Failed to create glfw window" << endl;
+		glfwTerminate();
+		return 1;
+	}
+	glfwMakeContextCurrent(window);
+
+	// init of GLAD
+	if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
+		cerr << "Failed to initialize GLAD" << endl;
+	}
+
+	glfwSetFramebufferSizeCallback(window, framebuffersize_callback);
+	return 0;
+}
+void framebuffersize_callback(GLFWwindow* window, int width, int height)
+{
+	glViewport(0, 0, width, height);
+}
+void freeAll(void)
+{
+	glfwTerminate();
+}
+void proccessInput(GLFWwindow* window)
+{
+	if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
+		glfwSetWindowShouldClose(window, true);
+}