admin

born 1976, Falticeni , Suceava , Romania
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Although most of us prefer the python version 2.6, today I tried to install the latest version of Django and Python 2.3.2. Make a new folder, named test-dj.

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$mkdir test-dj
$cd test-dj/

On the official site, I got the two archives:

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django-django-1.4-919-ge57338f.zip
Python-3.2.3.tar.bz2

I will start with the installation of python. We unzip the… Continue Reading Python 3.2 and Django 1.4 – installation.

This can be done with the next command:

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$ ffmpeg -r 50 -s 1280x720 -f x11grab -i :0.0 -vcodec msmpeg4v2 -qscale 1 output_filename.avi

Explanation of this command is shown below.

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$ ffmpeg -r 50

The frame rate in which you want to record, in this example 50 frames per seconds is used.

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-s 1280×720

The screen resolution that you want to record. Do not try to use a… Continue Reading Record your desktop screen with ffmpeg.

You can execute copies a large block of data to and from disk. This will minimize disk caching. Next is one example if our test system has 1GB of RAM. It is easy ( 1GB = 250,000 blocks ).

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$ time sh -c "dd if=/dev/zero of=bigfile bs=8k count=250000 && sync"
250000+0 records in
250000+0 records out
2048000000 bytes (2.0 GB) copied, 37.0113 s, 55.3 MB/s
 
real 0m40.910s
user 0m0.172s
sys 0m12.641s

It’s very hard to argue with this dd test.

This is a first part tutorial about Linux game using C++ and OpenGL libs. Writing a C++ game can be difficult. You will need to focus on program structure and then to know how to create the necessary classes. Let’s see the files I used:

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display.cpp
display.hpp
game.cpp
game.hpp
main.cpp

The main.cpp file is… Continue Reading Writing a basic game with C++ and OpenGL libs – part 001.

How to create a series of directories using a standard format.

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printf "image%01d\n" $(seq 0 3) | xargs -I{} mkdir {}

Let’s see the result :

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$ ls image*
image0/ image1/ image2/ image3/

Delete all this folder is easy, just use this command:

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printf "image%01d\n" $(seq 0 3) | xargs -I{} rm {} -f -r

How to create a series of text files using a standard format.

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printf "text%01d\n" $(seq 0 3) | xargs -I{} touch {}.txt

Let’s see the result :

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$ ls text*.txt
text0.txt  text1.txt  text2.txt  text3.txt
 

How to… Continue Reading Simple bash script to create folders, files and images .

We use a simple hello program. Type the following program into your favorite editor.

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#include
int main()
{
printf("Hello world\n");
return 0;
}

We don’t want to debug our intro. We compile it using size-optimization and no frame-pointers.

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$ gcc -Os -fomit-frame-pointer test001.c -o test001

Let’s see how big it executable.

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$ ls -l test001
... 9043 2012-05-19 17:39 test001

We have about 9043 bytes. We’ll strip the executable and remove useless… Continue Reading Using size-optimization with gcc .

Blender is an open source 3D content creation suite. Ogre 3D is a 3D library for multiple desktop and mobile platforms. But is a problem between this tow way. The last Blender 3D did not have yet a script to export the mesh to last Ogre 3D. What we can… Continue Reading Old tips and tricks with Ogre and Blender.

Use this command to show all the processors:

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$ls  /proc/acpi/processor/

Show the number of all processors

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$ls  /proc/acpi/processor/ | wc -l

Go to the :

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$cd proc/acpi/
/proc/acpi $ ls -l | awk '{print $8};'
ac_adapter
battery
button
dsdt
embedded_controller
event
fadt
fan
info
power_resource
processor
sleep
thermal_zone
wakeup

All of these folders and file have info about your processors, but you need to use ACPI.