Add the OpenGL example CMake

.gitignore

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+build

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.9)
+
+project(OpengGL_Example)
+
+set(CMAKE_CXX_STANDARD 17)     
+set(CMAKE_VERBOSE_MAKEFILE ON)
+
+add_executable(opengl_example main.cpp)
+
+# Set executable dependency libraries
+# Equivalent to pass flags -lGL, -lGLU and -lglut 
+target_link_libraries(opengl_example GL GLU glut)
+
+# Add target to run executable 
+add_custom_target(run-ex1
+    COMMAND opengl_example
+    DEPENDS opengl_example 
+    WORKING_DIRECTORY ${CMAKE_PROJECT_DIR}
+)

compile.sh

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+#!/bin/bash
+
+#gcc -o opengl_example main.cpp -lGL -lGLU -lglut -lm 
+
+rm -rf build
+mkdir -p build
+cd build
+cmake ..
+make -j4

main.cpp

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+// http://www.codebind.com/linux-tutorials/install-opengl-ubuntu-linux/
+#include <GL/glew.h>
+#include <GL/glut.h>
+ 
+void displayMe(void)
+{
+    glClear(GL_COLOR_BUFFER_BIT);
+    glBegin(GL_POLYGON);
+        glVertex3f(0.5, 0.0, 0.5);
+        glVertex3f(0.5, 0.0, 0.0);
+        glVertex3f(0.0, 0.5, 0.0);
+        glVertex3f(0.0, 0.0, 0.5);
+    glEnd();
+    glFlush();
+}
+ 
+int main(int argc, char** argv)
+{
+    glutInit(&argc, argv);
+    glutInitDisplayMode(GLUT_SINGLE);
+    glutInitWindowSize(1920, 1080);
+    glutInitWindowPosition(0, 0);
+    glutCreateWindow("Hello world!");
+    glutFullScreen();
+    glutDisplayFunc(displayMe);
+    glutMainLoop();
+    return 0;
+}