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Odin1985

OpenGL Comparing opengl libraries like glut and others

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Well since i havent worked in some time in opengl or coding for any sort i was researching most stuff over again to get myself up to speed, so i was going to ask the community what are the common things now, i mean normaly i know most ppl use or used GLUT for easy opengl development but with all the lastest developments in hardware and such does GLUT has gone a bit outdated or is still good to use in big projects or complicated stuffs like new terrain rendering, images, effects and such? is there anything new to use beside the new shading language opengl got out, or still using the opengl library with part of the glsl and such is the best way to go?

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For the most part, people seem to have stopped using GLUT due to that fact that is outdated, no longer supported, and still hasn't been open-sourced by the developer.

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That very page you link to contains the notice that

Quote:

GLUT is not open source. Mark Kilgard maintains the the copyright. There are a number of newer and open source alternatives.


The source is available, but depending on what you define "open source" to be, this may or may not qualify. The source code itself prominently displays the notice:

Quote:

/* This program is freely distributable without licensing fees
and is provided without guarantee or warrantee expressed or
implied. This program is -not- in the public domain. */


A cursory glance over the source distribution did not reveal more specific licensing information (its not under the GPL or LGPL, for example). Not being a lawyer or particularly familiar with licensing issues, I can only assume this means that, while you can look at, and recompile, the GLUT library, you aren't really allowed to change it and redistribute it or call it your own.

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GLFW is an alternative to SDL that might be worth looking into. Drew Benton did a a comparison between the two which seems to be down now. Here is the google cache.

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ty for all the inputs they are really helpfull, but in this case what about not using a library at all, just using the opengl and thats all

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in that case you will have to come up with the window interface and input system yourself.

To be honest, unless you have a specific reason for wanting todo that and all the work it requires I'd not bother and stick with one of the ones named above <pimp>or even take a look at my own window framework, which I admit is only Win32 compatible right now due to a lack of a linux box...</pimp>

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I run on a Mac, so comparissons come out slightly different.

First off, GLUT is an imediate down, it is antique at this point, and requiring you to hand control of your program to a never-returning main loop is just plain nasty.

SDL is quite nice, but window initialisation is very verbose, and I never use most of the other features (2D graphics, audio, etc.). It also lets you poll for input, and has full keyboard support (including international keyboards, and other mappings).

GLFW is almost perfect as a windowing enviroment, except for one small flaw: it doesn't let you prevent the window from being resized by the user when in windowed mode (or even constrain the resize to a fixed aspect ratio). This is a real pain, as none of my projects let the user randomly mess with the aspect ratio).

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umm nice, i wanted to know if i use sdl or other, would it be simple to port for different things, like mac, linux and others, i use windows so i know it will be usable in win, but what about the others?

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I'll have to collect my thoughts before responding this thread (as well as think about why I haven't updated my article yet), but -

Quote:
Original post by swiftcoder
GLFW is almost perfect as a windowing enviroment, except for one small flaw: it doesn't let you prevent the window from being resized by the user when in windowed mode (or even constrain the resize to a fixed aspect ratio). This is a real pain, as none of my projects let the user randomly mess with the aspect ratio).


Luckily this little flaw can be easily fixed (Win32):

1. Line 773 of win32_window.c contains the line: dwstyle |= WS_OVERLAPPEDWINDOW;

2. All you need to do is change it to use a window style that does not allow resizing. I used: dwstyle |= (WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX);

If you want the new project, here it is. (The binary is in the _BIN folder, I used the 'nmake win32-msvc' command to build it, but there is also a VC7.1 project file if you need to compile it though VS and not via CL)

Here is a test project:

#include <stdlib.h>
#include "glfw.h"

#pragma comment ( lib, "Opengl32.lib" )
#pragma comment ( lib, "glu32.lib" )
#pragma comment ( lib, "GLFW.lib" )

int main(int argc, char* argv[])
{
if(glfwInit() != GL_TRUE)
{
return -1;
}

if(glfwOpenWindow(640, 480, 0, 0, 0, 0, 0, 0, GLFW_WINDOW) != GL_TRUE )
{
glfwTerminate();
return -1;
}

glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum(.5, -.5, -.5 * ((float)480.0f) / 640.0f, .5 * ((float)480.0f) / 640.0f, 1, 50);
glMatrixMode(GL_MODELVIEW);

while(glfwGetWindowParam(GLFW_OPENED) && !glfwGetKey(GLFW_KEY_ESC))
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
/****************************************/
glTranslatef(0, 0, -5);
glColor3f(0.5f, 0.5f, 1.0f);
glBegin(GL_QUADS);
glVertex3f(-1.0f, 1.0f, 0.0f);
glVertex3f( 1.0f, 1.0f, 0.0f);
glVertex3f( 1.0f,-1.0f, 0.0f);
glVertex3f(-1.0f,-1.0f, 0.0f);
glEnd();
/****************************************/
glfwSwapBuffers();
}
glfwTerminate();

return 0;
}



And a screenshot, which shows how there is no resize window style any more (or maximize either)

Free Image Hosting at www.ImageShack.us

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Quote:
Original post by Drew_Benton
Quote:
Original post by swiftcoder
GLFW is almost perfect as a windowing enviroment, except for one small flaw: it doesn't let you prevent the window from being resized by the user when in windowed mode (or even constrain the resize to a fixed aspect ratio). This is a real pain, as none of my projects let the user randomly mess with the aspect ratio).


Luckily this little flaw can be easily fixed (Win32):


Thanks for that, but I really don't wan't to mod someone elses source for each platform.

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Quote:
Original post by Odin1985
Well since i havent worked in some time in opengl or coding for any sort i was researching most stuff over again to get myself up to speed, so i was going to ask the community what are the common things now, i mean normaly i know most ppl use or used GLUT for easy opengl development but with all the lastest developments in hardware and such does GLUT has gone a bit outdated or is still good to use in big projects or complicated stuffs like new terrain rendering, images, effects and such? is there anything new to use beside the new shading language opengl got out, or still using the opengl library with part of the glsl and such is the best way to go?

I use SDL. GLUT is terribly outdated and a bit rubbish anyway. About the only thing it has over SDL is that it can display multiple windows. Its keyboard handling totally sucks, though, and renders it effectively useless for games, as far as I'm concerned. Freeglut is a little better in this regard, but still won't report the use of interesting keys like control or shift (there's glutGetModifiers, but that can only be used when you're pressing another key or mouse button -- you can't simply respond to the user tapping the control key).
Quote:
Original post by Kambiz
Quote:
Original post by swordfish
..., and still hasn't been open-sourced by the developer.

GLUT is open source, you can download the sorce code from here:http://www.opengl.org/resources/libraries/glut/

From that very page:
Quote:

GLUT is not open source. Mark Kilgard maintains the the copyright. There are a number of newer and open source alternatives.

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