# Difference between revisions of "OpenCL GPGPU Raytracing"

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Your project is to help us introduce a GPGPU pipeline into BRL-CAD using OpenCL. You're welcome to use a library that encapsulates OpenCL. We have a dozen primitives in BRL-CAD that need to be converted to OpenCL. One of them which is done is an ellipsoid, a [[wikipedia:Quadric|quadric]] primitive, so you have an example to follow. Your objective is to implement at least two more while evaluating how your conversion compares to the non-GPGPU implementation. | Your project is to help us introduce a GPGPU pipeline into BRL-CAD using OpenCL. You're welcome to use a library that encapsulates OpenCL. We have a dozen primitives in BRL-CAD that need to be converted to OpenCL. One of them which is done is an ellipsoid, a [[wikipedia:Quadric|quadric]] primitive, so you have an example to follow. Your objective is to implement at least two more while evaluating how your conversion compares to the non-GPGPU implementation. | ||

− | These quadric primitives still need to be converted: elliptical hyperboloid, superquadratic ellipsoid | + | These quadric primitives still need to be converted: elliptical hyperboloid, and superquadratic ellipsoid. |

These primitives should also be straightforward to convert: polyhedron with an arbitrary number of faces (similar to arbitrary polyhedron), and FASTGEN4 CLINE. | These primitives should also be straightforward to convert: polyhedron with an arbitrary number of faces (similar to arbitrary polyhedron), and FASTGEN4 CLINE. |

## Revision as of 12:04, 22 October 2017

Contact "brlcad" on irc.freenode.net

BRL-CAD has one of the oldest and fastest parallel ray tracing implementations around but we don't currently leverage the GPU. With implicit geometry and constructive solid geometry (CSG) Boolean operations, we also have a very different approach to ray tracing that has its own set of academic challenges.

Your project is to help us introduce a GPGPU pipeline into BRL-CAD using OpenCL. You're welcome to use a library that encapsulates OpenCL. We have a dozen primitives in BRL-CAD that need to be converted to OpenCL. One of them which is done is an ellipsoid, a quadric primitive, so you have an example to follow. Your objective is to implement at least two more while evaluating how your conversion compares to the non-GPGPU implementation.

These quadric primitives still need to be converted: elliptical hyperboloid, and superquadratic ellipsoid.

These primitives should also be straightforward to convert: polyhedron with an arbitrary number of faces (similar to arbitrary polyhedron), and FASTGEN4 CLINE.

Difficulty: Easy

Languages: C and OpenCL (or other GPGPU API)