How to Rotate a Vertex by a Quaternion in GLSL
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K-3D is free-as-in-freedom 3D modeling and animation software. It features a plugin-oriented procedural engine for all of its content, making K-3D a very versatile and powerful package.K-3D excels at polygonal modeling, and includes basic tools for NURBS, patches, curves and animation. Give it a try! K-3D 0.8 Release Notes * Completely rewritten data storage for geometric meshes - good for rendering one million polygons at interactive rates. * Introductory support for the LuxRender render engine. * Experimental support for CSG operations. * Introductory support for NURBS. * Experimental material editor. * New / rewritten support for 3DS, Collada, OBJ, MD2, Ogre, PLY, STL, and SVG files. * Interactive Python Shell * New CMake-based cross-platform build system. * Over 300 regression tests run every night. * Nightly coverage testing. * New Mercurial-based version control. * New website. * New time-based release schedule - the next K-3D release will be October, 2010.