Andreas Böhm found a bug in my polygon convexity source code which classified a concave polygon as convex. Below is a screenshot with the wrong behaviour and the fixed version:
I have corrected the pseudocode in my article about polygon
convexity and also updated the applet source about polygon filling.
Thanks for the hint and also for providing me with the
So, finally I release now my first applet written in JavaFX
ever. It allows to calculate resistor/electronic color codes to
resistance values and the other way round. In fact it took me quite
long to dive into JavaFX and to write the user interface - that's
why the 'GUI' is written in JavaFX, but the calculation logic is
coded as normal Java classes. I think the result is quite nice so
check out the applet including source here in the Java
For personal needs and interest, I delved into the structure of
bootsectors of hard and USB drives. As I was also motivated to code
something in C again, the result is a simple tool providing the
most important information of a FAT/FAT32/NTFS bootsector and also
allowing the dump the bootsector to file for further investigation
with a hexeditor. Maybe it's a good starting point for some
disk-info utility. Check it out here.
I added a little commandline tool that allows you to change to
display settings by giving commandline arguments. That allows you
for example to change the display mode from a .bat file. It is kept
quite simple as it was coded solely for my personal needs, but
maybe someone else needs it - or wants to extend it. It can be
I 'hacked' this tiny app very quickly for personal needs. I
wanted my music files sorted after file creation / modification
date and none of the media players I use provided this
functionality. This tool just parses a directory (with/without
subdirectories) for music files and writes them to a *.m3u file
(ready to be loaded with e.g. Winamp) sorted after modification
date (from oldest to newest). That's it - maybe you are searching
for exactly this tool. If not, as the source is easy, feel free to
take it as a starting point to generate your own playlists by
implementing your own sorting criterias. <Look here>
Added a new part to my polygon algorithm serie - the implementation of Kong's Algorithm for polygon triangulation. Again, you find there a short explanation of this algorithm, the applet for playing around and of course the corresponding source code. Check it out here!
Thanks go to Mr.reCoder for correcting a bug in my Self-deleting Excecutable in
MASM. Now it works also with long pathnames including spaces by
using the GetShortPathName function
which was unknown to me till now :-)
Finally I release the complete source of my Online
Calculator as a little present... Merry Christmas to all of
you! I hope you find the source interesting, especially the
recursive parsing process and my autocomplete feature. If you like
it, use it or parts of it, please give my some credits and link to
Released my 'AviToYuv'
tool which converts avi files to planar 4:2:0 YUV files using the
Video for Windows API. I coded it during my diploma thesis for
having more videos to test my modified H.264 encoder - the standard
sequences were too boring...
I fixed two small parsing bugs in my Online
Calculator - I hope it works now always correct
Moreover, I added additionally an autocomplete feature I coded some time ago just for fun.
As you can see, I changed my site layout a bit - I hope
everything is now clearly arranged but I'm still not completely
happy. More modifications to come, I have also coded already two
useful tools concerning .yuv files which need just a some comments
and bug-fixing before releasing - but time is valuable resource for
the time being because my diploma thesis has of course priority.
But stay tuned!
I finished coding my online calculator - finally :-) If you also have never a hand calculator at your fingertips when you need one and are tired using the standard Win/Linux calculators for evaluating mathematical expressions then be sure to check it out:
Finally, the study thesis paper about my
HyperTransport-Monitoring-Core is available for download in the
Long time I did not solve any crackme - no time & no
interest. But while looking around on crackmes.de I found a
special, 'different' crackme. No .exe but a .gadget file - a
crackme in form of a Windows Vista Sidebar Gadget. Find out more
about it <here>.
While looking around my site, I found a bug in my Cohen-Sutherland-Applet which resulted in an endless loop. Fixed it - there was just missing a simple 'else'.
I came across Welzl's algorithm for calculating a smallest
enclosing disk in expected linear execution time while I learned
for my oral exam and found it quite interesting. Although it's
quite simple, I was fascinated why this really works and so I did
my own implementation of it which was harder than expected.
So a little site update...
* The coding section has now a table of contents.
* Updates on my study page concerning my study thesis.
* Removed dead links in the links section.
A few days ago I started learning for my last oral exam - this
time about computer graphics. Again I have to deal with B?zier
curves and so I came across the de Casteljau Algorithm again which
uses the recursive relation of Bernstein polynomials which in fact
bases on Pascal's rule. None of my books contains the proof of this
formula so I did it myself and decided to publish it here on my
site. It's really short and simple but perhaps somebody is
-> Articles -> Math & Theory or directly <here>
I did not code for month - damn I have no time! Too much to do for my studies and real life has priority in my spare time. But somewhen in future this hopefully will change and there'll be more updates :-)
Ok, so after my Cohen-Sutherland-Algorithm applet, it was not that big step to come across the Sutherland-Hodgman-Algorithm for clipping a polygon against a rectange. So here now some notes, my implementation as an applet and its source. If it should be useful for you, take it as a Christmas present :-). Check it out here!
So Merry Christmas and a happy new year 2008!
C u next year again!
Accidentally I found a little bug in my 'convexity helper
applet' belonging to my article about polygon convexity - in some
cases the paiting did not match the calculation. Nevertheless it's
fixed and updated.
Furthermore after having much to do and less time, I felt like coding again something... The result is my own implementation of the Cohen-Sutherland-Algorithm for clipping lines against a rectangle - of course with some notes, the applet and its source. Have fun and check it our here.
Also I just realized that many urls on my link-site are down (again) so that's definitely something I have to fix soon...
My own try of coding a messagebox api hook - crashes or doesn't
work in most cases :-( But perhaps you find it interesting
nervertheless - it's completely written in C. Check it here.
Just some very little changes on Links, Personal and Study
pages. Nothing really worth to mention.
While rummaging in my harddisks and old CDs, I found a backup
directory with lots of my old sites. Just for fun I made some
screenshots and put them in my misc-section :-) Perhaps some of you
visited my site in those days and they possibly recognize some
layout... anyway, have fun and have a look.
Released my fancy Skyscraper quest solver - a quite slow but
fine working backtracking approach to automatically solve the
quests. You find it on the same page as the applet, that means
Coded a nice little applet about a game I called Skyscrapers.
It's similar to sudoku just with other rules. It's really worth to
check it out. Of course Java sources are available as always. Have
fun, stay cool & check
Added two articles in the java section with a nice applet: the
first one on how to check if a polygon is convex, the other one on
how to fill a polygon with a scanline algorithm. Check it out!
Added my own proof that a Bernstein Polynomial has just one maximum, at t = i/n. You find it here in my new section 'Math & Theory Articles'.
Due to some requests I publish the old dirty C source of this
little library. Some functions can still be useful for people who
code PE tools in C.
But note that this source is from the beginning of 2003 and really badly coded. I found this source after long searching on an old CD and I'm not sure if this is not outdated - the source is almost uncommented and looks like garbage. Get it from the PEStuff Library Page.
Updated my notes on B?zier Curves: added applets about the
Bernstein Form of a B?zier Curve, the De Casteljau Algorithm and
about Degree Elevation of a curve. Go here to check it out!
The first two applets in my 'Understanding Bezier curves' -
Approach published. Find them in the Java section.
A stupid bug in the 'Hexen hexen' applet fixed which caused
sometimes that cards could not be moved to the grid and so you were
not be able to solve the game. Should work now....
I found a small card game from my childhood called 'Hexen hexen'
and made an applet out of it. Because it's not that easy to solve
and I wanted all possible solutions I also coded a nice solver
using backtracking. So check it out! Now!
< Go here >
Made a slightly improvement in my huffman compression, so
sometimes the compressed file is now a few bytes smaller. Available
as Version 1.1 in the C section.
I also coded a lame gui wrapper in C# cause a commandline tool is not that user-friendly ;-) Therefore a put the whole huffman algorithm in a dll file which the gui simply calls. You find it in the .Net section.
I coded a micro tool for myself but perhaps somebody else will
find it useful too. It adds an item to the popup menu in windows
explorer (when you rightclick a folder for example) to allow a you
to open a console (dosbox) in the current directory. That's pretty
useful for me! In fact this feature just needs 3 registry keys to
be enabled, but cause I forget these keys always when I need them
after formatting my harddrive, here is the little lame tool... Look
in the C section.
Also made some minor changes in the link section, especially a lot of the RCE links were corrupted and added some new ones.
Finally my implementation of the huffman compression algorithm
works and can be found in the C
section :-). That the console version... I don't know if I'll
code a GUI version for it. Let' see...
Solution for bOne's KeyMe#1 added. See Articles section.
Made two minor changes in Brainfuck Studio. But I noticed that I
don't feel like improving it no longer so this little project is
frozen for some time. Therefor I decided to release the source of
the new version as it is. Perhaps someone finds it useful.
Also found out that my bigfm tool has more bugs than I thought; actually it doesn't work for me anymore. So don't regard it as a real tool but more than a code example how to download a website and parse it in C.
Don't know what I'll do next, but something will come into my mind for sure....
Released the first version of Sunshine's Brainfuck Studio; a
simple development environment for Brainfuck written in C#.
Check it out here!
Solution for Devoney's Crackme 2.0 added. See Articles section.
Just some minor site changes in several sections and added the .NET section.
So Merry Christmas and a happy new year 2007!
C u next year again!
Solution for geeko's nagoya crackme added. See Articles section.
Ok here is my other sudoku solver which uses a backtracking
algorithm. It's a bit slower than the dancing links approach but
easier to understand. Again, it can just solve sudokus and does not
generate new puzzles, but it should be easy to change the solver to
a generator... but I'm too lazy to do it! => go to Java section
Finally I got it working ..... My sudoku
solver! I really spent some time, but I finally suceeded to code
it. It uses Algorithm X with Dancing Links by Knuth. Don't understand anything? In the Java section where you find the solver are also some links
to information. This algorithm is really not easy to understand nor
easy to implement but once you get running, it works like hell!
Knuth must be one of the most intelligent computer scientists in
the whole world. So have fun with the source.
Hm, seems the summer has left Germany... so there was some time
for coding: I made a small utility which changes the text color and
the text background color of the symbols on the desktop. Cause in
WinXP there is soemthing shit: either you choose a background color
for the symbols or make the background transparent but then there
is an ugly shadow under the smbol text. My so-called "Desktop
Symbol Utility" can make a nice normal transparent background.
Btw, you find on its site also some notes I made while coding it...
> go here < .... Cya
Well, I pimped my personal site a bit. First the is more
information about my study... unfortunately only in German till now
cause I'm too lazy to translate all the subjects into English.
There is also another new site in the personal section, the so-called events site. This is more for my friends, cause the are some pics from holidays and stuff like this... Not so much stuff till now, but more too come.
Also I started to code a little app which shows informations about your harddisks. Again with plain Windows API... and the gui stuff is killing me. So it will take some time till I can release it....
Due to some boredom I coded a little applet which estimates you
blood alcohol concentration. Quite funny :-) Well I also wanted to
deal with with java a bit more, so this applet uses swing and xml.
Source as always free for download.
Added a little article about simple 1D/2D collision of two
balls. Also coded two little applets to simulate colliding balls.
You can find it in the Java section. Have fun!
Just a few updates in the link section and I got my own blog now
So, finally some news :-)
One night I was so bored that I played Minesweeper (yes you read right... this little simple that comes with Windows...) But just playing it was even more boring so I took a look at it and wrote a little tool showing me the positions of all mines. You can find this loader with source including a tutorial explaining some stuff in the Articles section. Have fun!
Well as you can see my site is still not often updated. At the
time I'm coding a screensaver and I hope I can finish it after my
exams in March... Stay tuned.
Version 1.1 of my RegionCreator is online. Well not
much really new, mainly bugfixing, more error handling and some
changes in layout.
Well I must admit that I don't like this lil tool as much as it should be... I was thinking of much faster and more powerful tool when I was coding it. It makes using regions in applications easier but it still sucks a bit. That's why I am going to stop improving it. Feel free to do with it what you want.
So my good intention for next year (beside others of course :-) is to plan my little software projects better before coding, to comment the source cleaner and in more detail and to finish them to 100%. I hope I will achieve these goals cause my coding style sucks damn to often!
Perhaps I will dive into Java3D. My first look woke up my interest; it really different from Opengl and DirectX. But I have to read much more to understand it... Well let's see....
I wish all my visitors Merry Christmas and a Happy New
Yes, finally a little update! As always I'm busy with my studies and
I don't code that much in my spare time. So I really have not so
many new things to put on my site, but better less and nothing. But
overall I feel fine and life is good!
Added an applet demonstrating the eight queens
problem. You can play around the find a solution yourself or
let calculate all possible solutions. Unfortunately it's quite slow
and the source is overbloated due to the gui und thread stuff, but
I hope you like it nevertheless!
I've coded a tiny tool for my personal use, cause after formatting my harddrive I always forget how to do it... And why not share it with you?
It's very handy to be able to open a dosbox window (console) from windows explorer by right-clicking a folder. Perhaps others find this feature also useful and are too lazy to manually edit the registry, so I have putted the executable with source online. You can download it ::here::!
I have written a new tool called Region Creator which
scans an image for a chosen transparent color and save this region
to file. So you can easily give your applications nice forms. Check
out my example code to see how to use region files in your own
Furthermore, I put a download section on my site. Now it's easier to separate between real applications I coded and code-snippets/examples/and so on.
Got a new little guestbook. So drop some
lines if you like my site...
- There is a little puzzle called 'Who owns the fish?' I like
really much. So I thought why not writing a little programm in C
which solves it? I haven't seen a programm in a higher language
solving a logical quest, so I tried my best to do it myself... In
fact the result is a little bruteforce, but it works... Check it out here!
- Finally, I've managed to put online the first source for a mobile game written by me: a little tetris clone called 'SunTris'. It's coded for MIDP 1.0; you should be able to run it in an emulator, e.g. J2ME Wireless Toolkit or Netbeans + mobile plugins. Go here!
- There is now a private intern section: if you are a friend of
me, contact me to get access!!!
- Site layout of my articles improved. Now they look all the same.
- Leave a message on the contact page if you wanna...
Yes! I'M ONLINE AGAIN
Well, again I have been offline for nearly half a year, but now everything is better: I have my own webspace and now I'm the owner of the domain sunshine2k. So it seems there won't be problems any more :-)
I'm feeling fine, study and job don't make too many problems and the summer arrives....
I've made some little changes in site design, and some pages like the personal section are new. During the next 2 weeks there will be some updates, so stay tuned!
Sorry, have been offline for months now. Got this server from a friend, so hopefully my site will stay online :-) I'm sorry that there are no new updates, but have really no time for coding and haven't "reversed" since last year. But hey, as soon as I have some spare time, I will start some new projects... Thanks for still visiting this out-of-date site.
no this site is not dead :-) But university & real-life are more important
and both need a lot of time as you know... Ok here some new stuff:
- FindFiles added (a little file searcher tool in C)
- outstanding PEStuff Example for MASM released
- released source for SecMakerV2 (no comments sorry, but clean written). Btw I fixed this micro-bug :-)
Tut "Inserting a splash screen into an exe through a dll" added
Tut "Manually adding imports" added
- Api constant listing added... (RE -> Tools/Misc)
PEStuff library released (Coding -> C)
- Some new pics and wallpapers
I just want to say thank you to all the people who wrote me e-mails/into my guestbook. You motivate me to keep this little lousy site alive! Thanx!!!
Btw I hope there will be some new nice essays in near future. I just have not enough time to make my ideas real. And on Monday my university study starts...
SecMaker V2 released
- some little changes in site design
ProcessView 1.0 released
- Simple Hex/Dec/Bin Calculator released, written in C
- Tut "Reversing dihux's ReverseMe #1" added
after having been on Gran Canaria for one week, I decided to upgrade my
Win98 to WinXP... just to find out that many of my self-coded progs don't
work anymore. Bah! So some of them I fixed, the others will follow. Really
new if just ProcessView, the name says it all...
- ProcessView 0.9 released
- SectionMaker 1.01 released - fixed a mini-bug
- "Sunshine's Umrechner" removed - was old and badly coded and doesn't run under Win NT/XP
- Micro update in WallpaperInvert to make it XP compatible
Asm corner added
- Tut for ParaBytes Nag Crackme addede
Iczelion's PE Tut 7 (Export Table) for Delphi
another new design... and the last one! The old one wasn't really good.
Please bookmark my new URL : www.sunshine.2kx.de.
www.kickme.to/sun2k and www.welcome.to/sunshine don't work anymore.
- Iczelion's PE Tut 6 (Import Table) for Delphi
- New version of Iczelion's PE Tut 5 (Section Table) for Delphi (now nonvcl)
Complete new site design... well hope everyone out there like it
- Sizer 1.0 (Coding->Other Stuff)
- XEyes "Southpark" (Coding->Other Stuff)
- New tut (crackme 2.0 by ozzman)
Passwordflag Remover Tool added; removes the asteriks in a password box
and shows the password (Coding-> System related)
- My 7 favorite wallpapers added
Tut "Code Injection for beginner: Inserting a MessageBox at program start"
- 1 Tool (needed for my new tut) added : Opgen
- Why does nobody write in my guestbook???
After a long time, site relaunched on new server with a new design. Hope you like it! It's now only in English available, German site removed. Sorry for you guys, too much work to translate everything. Intro removed, it was not really good...
-site CLOSED due to server problem
RVA Calculator 1.0
- Tuts "PE
File Format Offset" and "Manually adding a section" added
- Section Maker 1.0 + Source
Tut "Writing a loadee
Matrix Screen Saver 0.8 added
Very Simple Patch Generator 1.0 added
Flash & Mp3 Example added
- Link Section updated
Sunshine's Umrechner, Dll Example and Infest added
- Intro added
- "About" section added
- now my site is also in Englisch available!
- Site started
This site is part of Sunshine's Homepage