Capsule - Programming, Linux, and Life...

OBJ Parser in PaperVision3D

2010-06-05T01:58:00.000-07:00

During my internship in Amrita University(Kollam), I had to bang my head in 3D Objects. We were given project related to 3D objects. The task was simple to load all type of 3D format files in an Adobe flex application. We searched through the libraries (Away3d, Sandy3d, Alternativa3d, Papervision3d) and found Away3d the best and started working on that. We were near the project completion and came to know that we would have to design our project using best engine. One of my friend found that Away3d is slow and PaperVision3D is the best. We found PaperVision3D is also simple to load files. We succeeded in loading DAE(Collada), 3DS, KMZ, MD2 files. The problem began with the OBJ files. I found a link in Knut Urdalen's Blog about OBJ parser and copied OBJ Parser in my project and tried it. But I found many difficulties as we had to give MTL file and this could not load the textures also.
So I thought to enhance this OBJ parser and come up with the following code. This can load MTL file and textures itself.

Here is the link to the pages.

Get OBJ Parser

Hope, you will like it.

Introduction of OpenSolaris to Colleagues

2010-02-06T11:56:00.000-08:00

Hi all,
Today, I introduced OpenSolaris to my colleagues and there was an installation-fest also. I provided OpenSolaris Live CDs to all the guests and told them the instructions to install OpenSolaris on their laptops. They successfully installed OpenSolaris on their laptops. After that, I introduced the Interface and File System of OpenSolaris. Here are some snapshots of the event.

Thanks to one and all.
(Aakash Johari)
(Rajiv Gandhi Institute of Information Technology, Amethi)

Shutdown Command Attributes

2009-01-31T20:00:00.000-08:00

Shutdown –s
It will shutdown your computer in 30 seconds and display a message

Shutdown –s –t 40
It will shutdown in 40 seconds but you can only go up to 86400 (24 hours) but if you make it 0(Zero) it will show no message and just shutdown.

Shutdown –s –c ”haha the computer is going to shutdown”
It will shutdown with a message in a box under the time.

Shutdown –l
It will just log you of the computer.

Shutdown -i
It will display the GUI shutdown window.

Shutdown –r
It will restart the computer

Shutdown –a
It will abort the shutdown

Shutdown –f
It will force all running applications to close.

Try to rename your Windows folder

2009-01-19T04:27:00.001-08:00

Hi Guys!

You will be thinking that why I am telling you to rename your any folder while it is very simple work to do. Simply Right Click on Folder and Choose Rename and Rename your folder. But you try to rename your folder with following names and answer me why is it?

Aux, con, nul, prn, com1, com2, com3,..... lpt1, lpt2,...... , clock$

This is because these are the names of ports. But why is it think?

Speed up firefox

2009-01-18T22:24:00.000-08:00

Now Speed up you Firefox browser by following simple steps :

Increse the speed of your Broad Band Connection

Firefox speed Up
Firefox speed Up
FireFox Load Time

1. Type "about:config" into the address bar and hit return. Scroll
down and look for the following entries:

network.http.pipelining
network.http.proxy.pipelining
network.http.pipelining.maxrequests

Normally the browser will make one request to a web page at a time.
When you enable pipelining it will make several at once, which really
speeds up page loading.

2. Alter the entries as follows:

Set "network.http.pipelining" to "true"

Set "network.http.proxy.pipelining" to "true"

Set "network.http.pipelining.maxrequests" to some number like 30. This
means it will make 30 requests at once.

3. Lastly right-click anywhere and select New-> Integer.
Name it "nglayout.initialpaint.delay" and set its value to "0".
This value is the amount of time the browser waits before it acts on information it recieves.

If you're using a brodband connection you'll load pages 2-3 times faster now.

What to do if Task Manager, Registry Editor disabled by Administrator

2009-01-18T22:07:00.000-08:00

Hello guys,
In some windows systems, you might have seen that when you starts Task Manager or Registry Editor then a message is displayed that " 'Service' is disabled by Administrator". Don't worry you can get rid of this problem by simply adding the following registry key values -

For Task Manager :
Click on Start Button then Run

Copy and Paste this line and press Enter Key :
REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Pol icies\System /v DisableTaskMgr /t REG_DWORD /d 0 /f

For Registry Editor :
Click on Start Button then Run

Copy and Paste this line and press Enter Key :

REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableRegistryTools /t REG_DWORD /d 0 /f

Running Linux inside Windows

2009-01-18T09:00:00.000-08:00

Yes, it is possible to run Linux inside Windows. For this, you only will have to do the following steps.

Step 1 - Install the Microsoft Virtual PC Software
http://www.microsoft.com/windows/products/winfamily/virtualpc/overview.mspx

Step 2 – Locate and download a Linux Distribution

After installing Virtual PC , you will have to download a ISO image file of any Linux distribution. Here ISO image is required because the Virtual PC Software mounts the ISO image and executes it.

Ubuntu : http://www.ubuntu.com/
Fedora : http://fedoraproject.org/
Mandriva : http://www.mandriva.com/

Proceed to the download section of whichever distribution you choose, and if you are given plenty of options of types to download then look for a 32bit i386 ISO file.

As you want to use Ubuntu Distribution :

http://mirror.ox.ac.uk/sites/releases.ubuntu.com/releases/hardy/ubuntu-8.04-desktop-i386.iso

Download it into your PC.

Step 3 – Start Setup of Virtual PC

Start Microsoft Virtual PC and begin the wizard to create a new virtual machine, the following images illustrate this process using recommended settings. Click Next to begin the setup process:

Select “Create a new virtual machine”:

Call this virtual machine whatever you like, for example “Linux” or “Ubuntu”:

Select “Other” from the OS dropdown menu to customize the virtual PC:

Choose how much system RAM you wish to allocate to the virtual PC, if you can spare it, 512MB would be recommended. It does appear to allocate the whole amount of memory to the software, even if you are only using a small portion of it within the Virtual PC. 512MB should be fine for users with 2GB+ of Ram, but those with 1GB may struggle to run much else in the background.

Select create “A new virtual hard disk”:

Choose a location to save this virtual drive and assign a size (dependant on how much disk space you have left). You can make up to 3 virtual hard drives, but if you wanted more drives you can always partition them to as many drive letters as required.

Click finish to create the Virtual PC:

Here this completed. Enjoy using Linux in Windows!!!

About X-LockMore (Linux)

2009-01-18T08:45:00.000-08:00

Hello guys,

Now I am telling you about X-Lock. X-Lock locks the screen (X Server) till the user enters the password, all new server connections are refused. The screen saver is disabled. The mouse cursor is turned off. The screen is blanked and a changing pattern is put on the screen. If a key or a mouse button is pressed then the user is prompted for the password of the user who started xlock.

If the correct password is typed, then the screen is unlocked and the X server is restored. When typing the password Control-U and Control-H are active as kill and erase respectively. To return to the locked screen, click in the small icon version of the changing pattern.

In the lower part of the password screen a text is displayed. This message is taken from the first file of the following that exists: $HOME/.xlocktext, $HOME/.plan, or $HOME/.signature.

Download X-LockMore : http://ftp.debian.org/debian/pool/main/x/xlockmore/xlockmore_5.22.orig.tar.gz

Square Root without any built-in function (C++ Program)

2009-01-18T03:30:00.001-08:00

Now, I am going to represent a program which requires no built-in function to find the square root of a given number.
But for it you should know a little bit about the mathematics (Calculus). I am implementing epsilon-delta theorem here to find the square root of user given number.
Using the same concept, you can make a program to find the cube root of any number without any built-in function.
So here it is...

#include "iostream.h"

float absolute(float a) {
return ( a < 0 ? -a : a );
}

int main()
{
float guess = 1.0;
float epsilon = 0.0001;
float x;

cin >> x;

while ( absolute ( guess * guess - x ) >= epsilon ) {
guess = (x / guess + guess) / 2.0;
}

cout << "Square Root = " << guess << endl;

return 0;
}

Now A Small Story...

2009-01-17T11:47:00.000-08:00

Once a boy went to a shop with his mother.

The shop keeper looked at the small cute child and showed him a bottle with sweets and said 'Dear Child..u can take the sweets... but the child didnt take. The shop keeper was surprised.. such a small child he is and why is he not taking the sweets from the bottle. Again he said take the sweets.... now mother also heard that and said.. beta take the sweets.. yet he didnt take...
The shopkeeper seeing the child not taking the sweets... he himself took the sweets and gave to the child...... the child was happy to get two hands full of sweets ....
When returned to home Mother asked child...
Why didnt you take the sweets... when shop keeper told you to take...

Can you guess the response:

Child replies... Mom! my hands are very small and if i take the sweets i can only take few.. but now you see when uncle gave with his big hands.... how many more sweets i got!

Moral:
When we take we may get little but when God gives... He gives us more beyond our expectations.... more than what we can hold......................

Why linux better than Windows?

2009-01-17T10:02:00.000-08:00

Linux is being used everywhere. Especially where the main objective is to do programming. What are the reasons of its popularity?

Forget About Viruses : Linux hardly has any viruses. And that's not like "Oh well, not very often, you know". That's like "If you've ever heard of a real Linux virus, please tell me". Of course, a Linux virus is not impossible to get. However, Linux makes it very hard for this to happen. Reason is simple that most people use Microsoft Windows, and pirates want to do as much damage as possible. Linux uses 'Smart Authorization Management'. In Windows you (and any program you install) usually have the right to do pretty much anything to the system.
Drivers are not needed.
Linux protects our system. Windows let trojans, adwares, spywares and viruses enter easily.
Linux is free. It is an "Open Source Software" and the most common is the GPL (General Public License). This license states that anyone is allowed to copy the software, see the source code, modify it, and redistribute it as long as it remains licensed with the GPL.

SSH for graphical remote desktop

2009-01-17T06:58:00.002-08:00

You can also use ssh for graphical remote desktop in Linux. For this you simply will have to use the following command -
# ssh -X 172.16.1.125
password:

Now you can use the resources of the remote logged system in graphic interface.
As If you want to change the settings for VNC Viewer then simply type -
#vino-preferences

and now you can change settings for VNC viewer for that system.

Remote Shutting Down of Windows Computer by Linux Console

2009-01-17T06:35:00.000-08:00

Remote Desktop by Linux Console is another very interesting task to do. I have find it out to shut down a remote windows system by Linux console.
Hey.... Don't think that I am telling you to about hacking, this requires authentication. If you know the password and user name by which the computer has been logged on then you can do this.

To do this, you will have to type the following Linux command -

# net rpc -C "The comment you want to show before the computer shuts down..." -r -f -I 172.16.1.121 -U username%passwd