Pocket Physics

	Pocket Physics
	File:Pocketphysicds.png
General
Author(s)	0xtob
Type	Puzzle
Version	0.6
Licence	Mixed
Links
	[Media:Pocketphysicsds.zip Download]
	Website

Installiation

To run it, you need a DS and an adapter card for booting homebrew.If you want to save your creations, you need to patch Pocket Physics with a DLDI driver.

If DLDI is working, you will see save and load icons in the right bar in Pocket Physics.If you are experiencing problems saving on a SuperCard Lite, try the pocketphysics_nothumb version.

User Guide

Just draw on the screen!

The buttons on the upper right switch between solid and dynamic objects. Press play to start the simulation, and press stop to reset it.

Use the box and circle tools on the lower left to draw perfect boxes and circles. Using the pin tool, you can pin objects to the background or to each other.

You can delete things with the "X" tool next to the play button. If you want to start over, tap the destructor button next to the delete button.

Use arrow button left of the delete button to move objects.

Using the D-Pad or the ABXY buttons you can move the paper.

Alternatively hold L (or R) and hold the stylus on the screen.

Select toggles the visibility of the viewing window on the top screen.

Tips

You can even draw and delete things while the simulation is running.
If you have a DS Motion card, you can use it to control gravity. Just plug it in and start Pocket Physics. If you launch homebrew from Slot-1, swap your card for the DS Motion and press L+R.
If you place two pins next to each other, the pinned shape will act like it's attached to a spring.
With the drawing tool, you can draw open and closed shapes. Shapes will be closed if the end position is close to the start position.
When creating a pin, hold down the pen and move it around. You can move the pin around until you lift the pen.
During simulation, you can use the move tool to throw objects.

Changelog

v0.6

Massive speed optimizations!
Fixed the "explosion" bug
As a side effect of this fix, results are now 100% reproducible
Moved to Box2D 2.0 (Box2D now has official DS support!)
Deleting sketches in the loading dialog
Objects that fall out of the world are no longer simulated
.PP files now have a single root elemnt => XML compliance
An author tag is added to the .PP files
Pins now snap to the center of gravity of shapes
There's a separate version that doesn not save screenshots for people with saving problems with the SuperCard Lite

v0.5

Added the moving tool
Improved speed (different timing, inactive objects fall asleep)
Better repeatability
sketches are now stored in /data/pocketphysics/sketches by default

v0.4

Saving and loading! (introducing the XML-based .pp file format)
Smart pin placement: While the pen is on the screen, you can move the pin around. It's position is fixed when you lift the pin. While you drag the pin around, the objects that are about to be pined are highlighted.
Smart deleting: Deleting also works just smart pin placement. Also, pins can now be deleted.
Toggle viewing window visibility with select.

v0.3

larger paper (3x3 screens)
scrolling using either D-Pad, ABXY, or pen (hold L or R)
dual screen support (overview on top, zoomed view on bottom)
open shapes (drawn shapes are only closed if the end is close to the start)
Using the actual shape for picking => o more accidential deletions
updated to box2d 2.0 (svn r20)
using ds hw div/sqrt in box2d
if simulation is behind time, 2 steps are performed at once => subjectively faster
faster and better drawing code
pins are hidden during simulation

v0.2

Pins! Pin things to the background or pin two things together
Numerical fixes in Box2d => (Hopefully) better stability
Removed dynamic timestep adjustment => Subjectively slower, but more reproducible results
Standby mode

v0.1

initial release

Credits

Petri Purho, Erin Catto, Brunni, Robert Kavaler, Eric Jordan, The DS Motion guys, Dovoto, Joat and Wintermute, Felipe Skroski