It came to my mind that i had done this little project a few months back before starting to work with runescape so i thought maybe someone wants to play with it So it is a 2D simulation where you can build some structure with balls and attach springs to them so the springs will try to keep the distance between the balls that what it was originally.
Left click to place a green freely moving ball and space + left click to place a red ball that is static and will not move. To delete a ball, hold numpad 1 and left click it. To set a spring between 2 balls, right click one ball and then right click the other ball and you will see a blue line appear between them, that is the spring. By holding the mouse scroll down and moving the mouse you can move everything in the world so the area doesnt limit to the area you see. When you have built enough, press numpad 7 so the simulation starts running. You can also pause the simulation with numpad 7, make some changes and unpause it if you want and you can add balls and springs at runtime too. You cannot drag the balls, all you can do atm is to edit the gravity by up and down arrow keys.
An example structure i made to show how you can test it, just for example:
I uploaded it here because the file is too large to upload as an attachment: http://www.filefactory.com/file/3c6a...n/DXSpring_rar
Another download link: http://www.sendspace.com/file/elhr0k
F-Secure (and probably other antivirus programs too) say that the .exe is a virus, that is because i have included the graphics inside it, you can see them in files.h in the source code. If you dont trust me, you are free to check the source and recompile it yourself and see that it says the same thing.
The compiled .exe is at DXSpring/Release folder if you just want to test it. The graphics arent very fancy, just made them quick with SumoPaint. There is no save/load option so dont spend like 2 hours building a huge thing and then accidentally close the thing
EDIT: Oh and if it says that d3dx_43.dll is missing or something like that, you need the newest directx: Download here
And if it still doesnt run, you might not have the redistributable: x64 Download or x86 Download