fltk2opengl.txt

fltk 2.0 source code

/**
 * This is just small FLTK 2.0, OpenGL application
 * Now you can imediately compile&run it in Dev-C++
 * 
 * The code below is based on simple OpenGL example 
 * written by Michael L Gleicher, 10/16/99
 * 
 * I've converted it to FLTK 2.0 and made this template
 * so it can be used out-of-box by people who learn FLTK+OpenGL.
 *
 * Enjoy FLTK!
 * Dejan Lekic, [e-mail], http://dejan.lekic.org
 */

#include <fltk/GlWindow.h>
#include <windows.h>
#include <GL/gl.h>
#include <fltk/run.h>

using namespace fltk;

// New MyGlWindow type... pretty simple
class MyGlWindow : public GlWindow {
public:
  MyGlWindow(int x, int y, int w, int h) :
    GlWindow(x,y,w,h,"FLTK OpenGL Window")
    {
    }
private:
  void draw() {              // the draw method must be private
    glClearColor(0,0,0,0);   // clear the window to black
    glClear(GL_COLOR_BUFFER_BIT); // clear the window
   
    glColor3f(1,1,0);             // draw in yellow
    glRectf(-.5,-.5,.5,.5);       // draw a filled rectangle
  };
};

// the main routine makes the window, and then runs an even loop
// until the window is closed
int main(int argc, char **argv) {
  int result = 0;
  
  MyGlWindow* gl = new MyGlWindow(100,100,500,500);
  gl->show();  // this actually opens the window   
  result = run();
  delete gl;
  return result;
}