Published on February 11, 2014
1 GPU Ray Tracing with CUDA BY TOM PITKIN Bill Clark, PhD Stu Steiner, MS, PhC
Objectives Develop a sequential CPU and parallel GPU ray tracer Illustrate the difference in rendering speed and design of a CPU and GPU ray tracer 2
Outline Introduction to Ray Tracing CUDA Parallelization with CUDA / Results Future Work Questions 3
What is Ray Tracing? Rendering technique used in computer graphics Simulates the behavior of light Can produce advanced optical effects 4
Light in the Physical World 5 Light Source Film Object with Red Reflectivity Pinhole
The Virtual Camera Model Eye Position – camera location in 3D space Reference Point – point in 3D space where the camera is pointing Orientation Vectors (u, v, n) – camera orientation in 3D space Image Plane – projected plane of the camera’s field of view Reference Point v (Up Vector) n u Eye Position 6
Ray Generation Map the physical screen to the image plane Divide the image plane into a uniform grid of pixel locations 7 Send a ray through the center of each pixel location
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