Website of Thomas Bonner Home Authored software: Sun calculation - calculatte sun rise and sunset times. view and import of srtm height data files. Graphics Viewer - displays graphics files like images and other 3D content. OphthaView - view and calculate ophthalmic lenses using raytraced wavefronts. Allows comparison to actual produced lenses by directly supporting the sdf/lds/lms file format standard from the VCA. Computed lenses may in theory be produced and used, but this software comes as is without any warranty. ApolFrac - three-dimensional appollonian spheres fractal using a specialized 3d engine (windows only) with a very low memory footprint. last change: may 2018 th dot bonner at gmail dot com [website]