Learning OpenGL in Ubuntu [closed]

Answer 1

a little update for the makefile because I found this old answers from @Millthorn and it didn't worked: you dont need to definde the include path since it's in standard lib https://stackoverflow.com/a/2459788/1059828

a minimal makefile to compile open GL could look like this:

LDFLAGS=-lglut -lGL -lGLU -lGLEW -lm
all: your_app

http://surflab.cise.ufl.edu/wiki/Getting_Started_with_OpenGL_in_Ubuntu

Answer 2

The first thing to do is install the OpenGL libraries. I recommend:

freeglut3
freeglut3-dev
libglew1.5
libglew1.5-dev
libglu1-mesa
libglu1-mesa-dev
libgl1-mesa-glx
libgl1-mesa-dev

Once you have them installed, link to them when you compile:

g++ -lglut -lGL -lGLU -lGLEW example.cpp -o example

In example.cpp, include the OpenGL libraries like so:

#include <GL/glew.h>
#include <GL/glut.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glext.h>

Then, to enable the more advanced opengl options like shaders, place this after your glutCreateWindow Call:

GLenum err = glewInit();
if (GLEW_OK != err)
{
    fprintf(stderr, "Error %s\n", glewGetErrorString(err));
    exit(1);
}
fprintf(stdout, "Status: Using GLEW %s\n", glewGetString(GLEW_VERSION));

if (GLEW_ARB_vertex_program)
    fprintf(stdout, "Status: ARB vertex programs available.\n");

if (glewGetExtension("GL_ARB_fragment_program"))
    fprintf(stdout, "Status: ARB fragment programs available.\n");

if (glewIsSupported("GL_VERSION_1_4  GL_ARB_point_sprite"))
    fprintf(stdout, "Status: ARB point sprites available.\n");

That should enable all OpenGL functionality, and if it doesn't, then it should tell you the problems.

Answer 3

Maybe you would like to use Qt to draw the windows and widgets.

Here's a tutorial based on the Nehe guides to show you how to create OpenGL images with Qt.

To learn OpenGL, the OpenGL Red Book is a must read. There's an online version. It has very good explanations and examples.

Answer 4

I'll guess that it is the compilation process that is the biggest difference initially. Here is a useful Makefile for compiling simple OpenGL apps on Ubuntu.

INCLUDE = -I/usr/X11R6/include/
LIBDIR  = -L/usr/X11R6/lib

FLAGS = -Wall
CC = g++                                  # change to gcc if using C
CFLAGS = $(FLAGS) $(INCLUDE)
LIBS =  -lglut -lGL -lGLU -lGLEW -lm

All: your_app                             # change your_app.

your_app: your_app.o
    $(CC) $(CFLAGS) -o $@ $(LIBDIR) $< $(LIBS) # The initial white space is a tab

Save this to a file called Makefile that should be in the same directory. Compile by writing make from terminal or :make from Vim.

Good luck