On 10/9/25 22:08, Bald Eagle wrote:
> And here is a much simplified diagram showing only 3 rays, with all extraneous
> lines removed.
> 
> Only the rays and the perpendicular distances are shown, color coded for
> bounding intersection test state.
> 

I'm loosely following your sor updates - good work. I'll try and carve 
out some time to code up your suggested changes in my working yuqk code 
& do some testing.

Bill P.

Post a reply to this message

William F Pokorny <ano### [at] anonymousorg> wrote:

> I'm loosely following your sor updates - good work. I'll try and carve
> out some time to code up your suggested changes in my working yuqk code
> & do some testing.

Thank you, Sir.
I'm hoping that at least a little bit of improvement will come of all of this.

Interested in your thoughts about the possibility of breaking the sor {} up into
individual spline segments for rendering to optimize the cylindrical bounding.

- BW

Post a reply to this message

2025 paper, if someone can access the full article.

https://www.researchgate.net/publication/3904359_Ray_tracing_surfaces_of_revolution_An_old_problem_with_a_new_perspecti
ve

Ray tracing surfaces of revolution: An old problem with a new perspective
February 2001Proceedings of Computer Graphics International Conference, CGI

Abstract
We present a new subdivision scheme that is shown to improve the performance of
ray tracing surfaces of revolution over Kajiya's (1983) classical work. This is
based on a monotonic interval partitioning of a generatrix of a surface of
revolution. The algorithm has a search complexity upper bound of O(log(m n)) for
m monotonic intervals and n subdivisions for each interval and runs up to three
times faster on large scenes. This method also suggests a novel hybrid bounding
volume scheme that reduces this number of intersection tests between a ray and
the actual object surface

Post a reply to this message

"Bald Eagle" <cre### [at] netscapenet> wrote:
> 2025 paper, if someone can access the full article.
>
>
https://www.researchgate.net/publication/3904359_Ray_tracing_surfaces_of_revolution_An_old_problem_with_a_new_perspec
ti
> ve

looks interesting. do you need it or do you already have it? I can mail it.

ingo

Post a reply to this message