Edit Infobox 3DS Homebrews: 3DS Physics Sandbox

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3DS Physics Sandbox is a homebrew that allows you to play around in an environment with simple physics. ==Features== * Manipulate multiple different sized squares with the stylus. * Objects will bounce off of each other. * The squares are affected by gravity, with walls and friction. * Modifiable gravity, collision elasticity, and friction values. * Collisions calculation uses momentum of squares. * Take a screenshot. * Control gravity by tilting 3DS (accelerometer). * Move camera with circle pad. * Walls that squares will bounce off of. * Different squares and walls can be made using on screen UI. ==Installation== ===Installing=== Available in 3DSX and CIA formats. * CIA - Install the .cia with the CIA manager of your choice. * 3DSX - Use the .3dsx provided with the Homebrew Launcher. ===Building=== This requires sf2dlib and expects the libsf2d directory to be in the same directory as 3dsphysicssandbox. Just run the makefile to build. ==Controls== Tap and Drag square - Move square X - Reset entire world B - bring selected square back to center of world D-Pad Left/Right - Change modifiable value D-Pad Up/Down - Increment current modifiable value L/R - Change increment (multiply and divide by 10) Circle Pad - move camera Y - toggle gyroscope as gravity Select - Save screenshot Start - Exit ==Media== '''3DS Physics Sandbox v0.3''' ([https://www.youtube.com/watch?v=R13nyHYJnTQ PieFace]) <br> <youtube>R13nyHYJnTQ</youtube> ==Known issues== If squares are traveling fast enough, they can clip through walls (more apparent in smaller squares). Sometimes squares get crushed against vertical walls because of x gravity. ==Changelog== '''v0.3''' *Added support for up to 32 squares. *Added walls, immobile objects(lines) that objects bounce off of (up to 32). *Removed square bouncing on edges of screen (by default replaced by walls in the same locations). *Added camera, use circle pad to move view around. *Updated UI: **Now contains two columns of information, global variables and object specific variables. **Change the mod_val scope to switch between these two. **All data of squares and walls can be modified (position, size, etc). **Use obj_type to change between squares and walls. **Use curr_view to change which object you are looking at. **Use coord to change the objects position. **Use vel.x/y to change the square's velocity. **Use direction to change wall's direction. **Use length to change the objects size. **NOTE: the program stops searching through the array when it finds the first inactive object. Add new objects in order. *Press X to reset the entire world to default. *Press B to bring the currently selected square to the center of the world. *Started modularization of code. *Collision now takes momentum into account (more realistic collisions). '''v0.2''' * Press Y to toggle using gyroscope as gravity , or allow the square to follow tilt of 3DS. * Press select to take a screenshot (needs optimization). * Friction now takes into account appropriate gravity, resulting in mostly increased friction at the default value. * Fixed precision bug with increment. '''v0.1''' * Bugs fixed, banner added, v0.1 finalized. ==Credits== * Smealum - creator of ctrulib and the homebrew menu. * xerpi - creator of sf2dlib. ==External links== * GitHub - https://github.com/pieface-/3dsphysicssandbox * GBAtemp - https://gbatemp.net/threads/wip-3ds-physics-sandbox.435936

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