How to Rotate a Vertex by a Quaternion in GLSL
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This program is a viewer for fractals like the mandelbrot set, newton sets, julia sets or nova fractals. It has several features, most notably a fast interpreter for custom functions.The most important features are:* Interpreter for your own formulas* * Includes macros for newton and nova-fractals* Edit color palette* * HSV-Editing* * L*a*b-colors* * Cubic-spline-interpolation* Intuitive multitouch support* * Moving some finger on the screen moves the pixel below it accordingly.* * Support for up to 3 fingers* Save images of arbitrary size (PNG)* * Images are added to the gallery automatically* * Images can be shared or set as wall paper.* Bookmarks: Save your favorite spots and fractals* Caching of values* * Changing color palette does not require to recalculate the whole image.* * Range of values can be normalized or set to some custom range.* Multithreading* Instant previews* Free, no advertisementFind a manual online:https://docs.google.com/document/d/1fZo4g8YZFOT6O-wNKAZsmOTqzo56FsDfQGgd0qnmfdA/pubThe source code is available under GPLv3:http://code.google.com/p/fractview/