How to get Augmented Reality: A Practical Guide examples working?
- by Glen
I recently bought the book: Augmented Reality: A Practical Guide (http://pragprog.com/titles/cfar/augmented-reality). It has example code that it says runs on Windows, MacOS and Linux.
But I can't get the binaries to run. Has anyone got this book and got the binaries to run on ubuntu?
I also can't figure out how to compile the examples in Ubuntu. How would I do this?
Here is what it says to do:
Compiling for Linux
Refreshingly, there are no changes required to get the programs in this
chapter to compile for Linux, but as with Windows, you’ll first have to
find your GL and GLUT files. This may mean you’ll have to download
the correct version of GLUT for your machine.
You need to link in the GL, GLU, and GLUT libraries and provide a path
to the GLUT header file and the files it includes. See whether there is
a glut.h file in the /usr/include/GL directory; otherwise, look elsewhere for it—you could use the command find / -name "glut.h" to search your entire
machine, or you could use the locate command (locate glut.h).
You may need to customize the paths, but here is an example of the
compile command:
gcc -o opengl_template opengl_template.cpp -I /usr/include/GL
-I /usr/include -lGL -lGLU -lglut
gcc is a C/C++ compiler that should be present on your Linux or Unix
machine. The -I /usr/include/GL command-line argument tells gcc to look
in /usr/include/GL for the include files. In this case, you’ll find glut.h and
what it includes. When linking in libraries with gcc, you use the -lX
switch—where X is the name of your library and there is a correspond-
ing libX.a file somewhere in your path. For this example, you want to
link in the library files libGL.a, libGLU.a, and libglut.a, so you will use the
gcc arguments -lGL -lGLU -lglut. These three files are found in the default
directory /usr/lib/, so you don’t need to specify their location as you did
with glut.h. If you did need to specify the library path, you would add -L
to the path.
To run your compiled program, type ./opengl_template or, if the current
directory is in your shell’s paths, just opengl_template.
When working in Linux, it’s important to know that you may need to
keep your texture files to a maximum of 256 by 256 pixels or find the
settings in your system to raise this limit. Often an OpenGL program
will work in Windows but produce a blank white texture in Linux until
the texture size is reduced.
The above instructions make no sense to me. Do I have to use gcc to compile or can I use eclipse?
If I use either eclipse or gcc what do I need to do to compile and run the program?
