GPU Pro 5

2. Object-Order Ray Tracing for Fully Dynamic Scenes 429

Tested once with

And twice with

Ray grid with queued rays

3

4

12

57

6

9

θ

θ:

θθθ θ θ

θ

θ1

1

111

1: 2: 3: 4: 5: 6: 7: 8: 9:

Ray links

Figure 2.8. Intersection testing with one triangle using the ray grid. Ray grid cells

are marked in the colors of the rays enqueued. Voxelization of the light-blue triangle

generates the blue-framed voxel fragments. A lookup in the array of ray links returns

both rays in one cell and only the yellow ray in another cell.

2.4.3 Precise Intersection Testing

After the ray grid has been constructed, we have direct access to all rays in-

tersecting a particular cell just by indexing