The computational power available on emerging many-core architectures, such as the Intel Xeon Phi processors on TACC's Stampede machine, enable ray-tracing, a higher quality technique.
However, recent architectural changes on supercomputers create significant opportunities for alternate rendering techniques. Many visualization programs (VisIt, Ensight, VAPOR, ParaView, VTK) use OpenGL for rendering. The standard technique for rendering geometry is rasterization and the most commonly used library for performing this is OpenGL. Scientific visualization plays a large role in exploring the scientific simulations that run on supercomputers new discoveries are often made by studying renderings generated through visualization of simulation results.
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