CODEWITHSUNDEEP
eventsopengl
b.allain732
b.allain732

Reputation: 9

How to use the openGL events handler ? [64 BITS]

I'm learning how to use the openGL but I only find tutorials using SDL functions for manage windows and events.

This the code I made with this tutorial:

#include <GL/gl.h>
#include <GL/glu.h>
#include <SDL/SDL.h>
#include <GL/gl.h>
#include <GL/glu.h>

int main(int argc, char **argv)
{

  SDL_Init(SDL_INIT_VIDEO);
  SDL_WM_SetCaption("Mon premier programme OpenGL !",NULL);
  SDL_SetVideoMode(640, 480, 32, SDL_OPENGL);

  bool continuer = true;
  SDL_Event event;

  while (continuer)
    {
      SDL_WaitEvent(&event);
      switch(event.type)
    {
        case SDL_QUIT:
          continuer = false;
    }
      glClear(GL_COLOR_BUFFER_BIT);
      glBegin(GL_TRIANGLES);
      glColor3ub(255,0,0);    glVertex2d(-0.75,-0.75);
      glColor3ub(0,255,0);    glVertex2d(0,0.75);
      glColor3ub(0,0,255);    glVertex2d(0.75,-0.75);
      glEnd();
      glFlush();
      SDL_GL_SwapBuffers();
    }
  SDL_Quit();
  return 0;

}

I'm ok tu use the SDL functions to manage windoxs but I would use the openGL events handler.

Does someone know how to replace and how to use it ?

Thanks

Upvotes: 1

Views: 1644

Answers (2)

datenwolf
datenwolf

Reputation: 162164

Does someone know how to replace and how to use it?

No. Because it doesn't exist.

OpenGL is focused on one thing: Drawing stuff to some framebuffer. In the case of a window framebuffer OpenGL has no capabilities in creating or managing it, and depends entirely on the operating system functions for this. SDL, GLUT, GLFW, Qt, … shrink-wrap the process of interacting with the OS in easy to use way, portable libraries with a cross-platform API.

Upvotes: 1

Colonel Thirty Two
Colonel Thirty Two

Reputation: 26559

OpenGL does not have an event handler. It focuses on drawing, not input.

To handle window events and input, you need to either use the OS facilities, or use a library like GLFW, GLUT, or SDL that helps/abstracts them.

Upvotes: 4

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