ompf2.com

Thanks a ton, that was exactly the nudge I needed. For example, here's a 4-ray vs. sphere: static v4sf intersect(const ray4_t *ray) { /* Compute discriminant. */ const v4sf b = -dot(&(ray->origin), &(ray->direction)), d = b * b - sq(&(ray->origin)) + V4SF_ONE, t = b - __builtin_ia32_sqrtps(d); /* Wh...

I'm finally getting with the program and working on learning SSE, but I'm having trouble trying to build a 4 ray vs. 1 sphere intersection function. While it's trivial in single-ray land, when working with SIMD instructions I'm getting pretty confused about how one goes about handling branching. Doe...

Beautiful demo!

The author's writeup about making it is available here: http://directtovideo.wordpress.com/2013 ... y-tracing/

Dade wrote:It seems to run with only 2 threads on my Linux+Firefox+i7 3930K, is that expected ?

It's supposed to use up to four threads, but I honestly don't know how browsers go about scheduling them!

https://raw.github.com/ironwallaby/jellyjelly/master/nessie.png Nothing especially fancy, just a simple little path tracer and a cute little dinosaur, hacked together in a couple evenings and about 400 lines of JavaScript. The path tracer itself is pretty crude (I really need to read up more on the...

Thank you for the link, it is an interesting read.

I am! (Was!)

I too have noticed a lack of outgoing notification emails (in addition to my signup emails), so I can confirm the issue.

I havn't touched ray tracing in a while, but recently stumbled across the article Ray tracing with the BSP tree , which piqued my interest in it again since it seems far more elegant to my mind to raytrace a single data structure (voxels in hierarchical grids or a SVO, polytopes in a BSP-tree, etc.)...