# 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. 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. Your objective is to implement at least two more while evaluating how your conversion compares to the non-GPGPU implementation. | ||

− | One which is done is an ellipsoid, a [[wikipedia:Quadric|quadric]] | + | One primitive which is done is an ellipsoid, a [[wikipedia:Quadric|quadric]], so you have an example to follow. These quadrics still need to be converted: elliptical hyperboloid, and superquadratic ellipsoid. |

Another primitive which is done is an arbitrary polyhedron, so you have another example to follow. These primitives still need to be converted: polyhedron with an arbitrary number, and FASTGEN4 CLINE. | Another primitive which is done is an arbitrary polyhedron, so you have another example to follow. These primitives still need to be converted: polyhedron with an arbitrary number, and FASTGEN4 CLINE. |

## Revision as of 12:07, 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. Your objective is to implement at least two more while evaluating how your conversion compares to the non-GPGPU implementation.

One primitive which is done is an ellipsoid, a quadric, so you have an example to follow. These quadrics still need to be converted: elliptical hyperboloid, and superquadratic ellipsoid.

Another primitive which is done is an arbitrary polyhedron, so you have another example to follow. These primitives still need to be converted: polyhedron with an arbitrary number, and FASTGEN4 CLINE.

Difficulty: Easy

Languages: C and OpenCL (or other GPGPU API)