Linux(Ubuntu 14.04) setting up OpenGL

 1 #include "GL/freeglut.h"
 2 #include "GL/gl.h"
 3 
 4 /* display function - code from:
 5      http://fly.cc.fer.hr/~unreal/theredbook/chapter01.html
 6 This is the actual usage of the OpenGL library. 
 7 The following code is the same for any platform */
 8 void renderFunction()
 9 {
10     glClearColor(0.0, 0.0, 0.0, 0.0);
11     glClear(GL_COLOR_BUFFER_BIT);
12     glColor3f(1.0, 1.0, 1.0);
13     glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
14     glBegin(GL_POLYGON);
15         glVertex2f(-0.5, -0.5);
16         glVertex2f(-0.5, 0.5);
17         glVertex2f(0.5, 0.5);
18         glVertex2f(0.5, -0.5);
19     glEnd();
20     glFlush();
21 }
22 
23 /* Main method - main entry point of application
24 the freeglut library does the window creation work for us, 
25 regardless of the platform. */
26 int main(int argc, char** argv)
27 {
28     glutInit(&argc, argv);
29     glutInitDisplayMode(GLUT_SINGLE);
30     glutInitWindowSize(500,500);
31     glutInitWindowPosition(100,100);
32     glutCreateWindow("OpenGL - First window demo");
33     glutDisplayFunc(renderFunction);
34     glutMainLoop();    
35     return 0;
36 }