OpenCL path tracer / ray tracing demo using the AMD OpenCL Beta SDK

Edison

http://davibu.interfree.it/opencl/smallptgpu/smallptGPU.html

SmallptCPU vs SmallptGPU

Written by David Bucciarelli

SmallptGPU is a small and simple demo written in OpenCL in order to test the performance of this new standard. It is based on Kevin Beason's Smallpt available at http://www.kevinbeason.com/smallpt/. SmallptGPU has been written using the ATI OpenCL SDK beta4 on Linux but it should work on any platform/implementation (i.e. NVIDIA). Some discussion about this little toy can be found at Luxrender's forum

A video of SmallptGPU is available here: http://vimeo.com/8013005 (the old low quality version is available here: http://vimeo.com/8013005)

Key bindings

• 'p' - save image.ppm

• ESC - exit

• Arrow keys - rotate camera left/right/up/down

• 'a' and 'd' - move camera left and right

• 'w' and 's' - move camera forward and backward

• 'r' and 'f' - move camera up and down

• PageUp and PageDown - move camera target up and down

• ' ' - refresh the window

• 'm' - starts to record a movie in binary format (it can be decoded with the decodemovie utility)

• 'l' - enable/disable indirect diffuse path (available only on CPU version because a bug of ATI's compiler)

• '+' and '-' - to select next/previous object

• '2', '3', '4', '5', '6', '8', '9' - to move selected object

下载： smallptgpu-v1.3.tgz (includes sources, Linux 64bit binaries and Windows 32bit binaries)

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