Sandbox
License
The supplied files may be copied as long as
no fee is charged, provided no changes are made to any files. The source code may not be
used or modified without permission from the author.
Overview
Sandbox is a toy real-time mass and spring
simulator where you can build objects and play with them to see how they react. The
simulator models gravitational pull, dampened spring forces, kinetic friction, static
friction and viscous damping.
System requirements
This application runs on the Win32 platform and has been tested
on Microsoft Windows 95, Microsoft Windows 98, Microsoft
Windows NT and Microsoft Windows XP. The application is written such that
the same simulator event taking place on computers running at different speed will take
the same amount of real-time to perform. However, the faster your computer, the better the
frame rate.
Instructions
Simply run the sandbox.exe file to
start the application. You will be presented with a empty window with a menu bar.
On the menu bar, there is an item called Mode
which you can use to set the current manipulation mode:
In this mode you build objects out of masses
and springs:
Left click in an empty space to create a
new mass. This will become the selected mass, which can be seen by the spring that is
attached from it to your cursor.
If you create another mass, or left click
on a mass whilst another is selected, a spring is automatically attached between them.
Left click on the selected mass to deselect
it.
Right click on a spring or a mass to delete
it.
Left click and hold anywhere inside the
window to grab the closest mass.
Drag to move it and release the button to
let go.
If you let go whilst dragging, you will
throw the mass.
In this mode you can stick down masses to
stop them moving:
Also on the menu bar, there is an item called Options
which you can use to toggle different options on and off:
When this is on, every mass will be attracted
towards the ground.
When this is on, masses will experience
friction when they are in contact with the edge of the window.
Finally, using the File item on the menu bar, you can reset the
application, save what you have made or restore something that was made before.
Files
The directory this file is in should contain:
sandbox.exe file.
Application executable file.
ball.san, boxes.san, freefall.san,
man.san, mesh.san, rope.san and tube.san files.
Example application files.
msvc++ folder.
Contains Microsoft Visual C++ 6.0
workspace for compiling the application.
source folder.
Contains complete application source code for
Win32 platform.
Contact
You can visit the author's homepage or send e-mail regarding questions, comments,
suggestions or bug reports.
Disclaimer
This material is provided "as is",
with absolutely no warranty expressed or implied. In no event shall the author be
held liable for any damages whatsoever, including without limitation, damages for loss of
business profits, business interruption, loss of business information, or any other loss
arising from the use or inability to use the software. Any
use is at your own risk.
Copyright © 2002 Sean Wilson. All Rights Reserved.
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