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magic donut

By Applied Thaumaturgics

This app is only available on the App Store for iOS devices.


one of the most impressive 3D apps out, Magic Donut really shows off how much computing power is available in your iPhone.

3,500 vertices are recalculated every frame at 30 frames per second (3GS), to form a dynamic, constantly changing torus (donut) complete with shading and touch-interaction. you can also change the coloring, shading style, and parameters defining the toroid's shape.

for the technically-minded,
this is using the fixed-function pipeline, no shaders. it's also not using GL lights, but rather calculating the shading itself in native Objective C. to obtain the shape, a base torus is stored and each frame a distorted one is generated off of it through the magic of sines and cosines. all shading and coloring is just vertex colors; there are no textures involved. vertex normals are calculated twice per iteration, once to help with the distortion, and again for shading.


What's New in Version 1.2

minor UI changes.

iPhone Screenshots

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Customer Reviews

Amazing Graphics

Amazing graphics, and not just for an iPhone. I've never seen anything quite like it. It's great to trip out on.

Suggested setting: Press the color button 5 times (to the color after blue) and and third button 3 times (all the way down).


A great 3d app for just playing around.

magic donut
View in iTunes
  • Free
  • Category: Entertainment
  • Updated:
  • Version: 1.2
  • Size: 1.6 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 3.1 or later. Compatible with iPhone, iPad, and iPod touch.

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