How to Rotate a Vertex by a Quaternion in GLSL
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A Qt-based fractal flame editor which uses a C++ re-write of the flam3 algorithm named Ember and a GPU capable version named EmberCL which implements a portion of the cuburn algorithm in OpenCL. Fractorium and its associated command line tools can render fractal flames using the CPU, or OpenCL. In order to use OpenCL, you must have an nVidia card that has the Fermi architecture or later, or a recent AMD card. If you attempt to use an unsupported card, you will receive an error message and the CPU renderer will be used instead.