Open Project: Voronoi

Volker Harun · October 25, 2007, 10:36:11 AM

Attached is a view of my workspace with the previews.

Most interesting is the preview of the Dot-Product (the black and white image on the left side).
This is what I love ,-)

Volker Harun · October 25, 2007, 11:14:49 AM

Here we go:
For the following picture I used the Dot Product of the 3D-A-Vector with itself (which produces a scalar). The Scale is ~300.
One displacement goes 200 positve, a transformed displacement goes 200 negative.

Again just a very rough and dirty quick render, that line in front is a luminous surface in a shadow (but the sky is nice) ,-)

Volker

Volker Harun · October 25, 2007, 11:22:19 AM

Something that I noticed before, the Transform Shader does not seem to have any effect ... can anybody confirm this?

Volker Harun · October 25, 2007, 11:42:23 AM

Multiplying the DotProduct with Pi and running a Cosine creates Blobs

rcallicotte · October 25, 2007, 01:00:54 PM

I haven't had time to build alongside of you, so I can't right now. I can always try a Transform Shader in what I'm working on if it helps.

Quote from: Volker Harun on October 25, 2007, 11:22:19 AM
Something that I noticed before, the Transform Shader does not seem to have any effect ... can anybody confirm this?

Oshyan · October 25, 2007, 01:41:45 PM

The Transform Shader does work, it just may not work in the way you need it to, or for what you're doing.

- Oshyan

old_blaggard · October 25, 2007, 02:26:33 PM

I have failed at getting the transform shader to work with functions, but I assumed that it was just me. This is some pretty awesome stuff, you guys! I'm wishing I wasn't so busy with classes so that I could help contribute

.

Volker Harun · October 25, 2007, 03:30:38 PM

Oshyan ... so you think that a 'Get Position in Texture' would be wiser? $:-\$

Oshyan · October 25, 2007, 03:38:51 PM

I'm honestly not sure if the Transform Shader works with Functions, so that may be the key.

- Oshyan

Volker Harun · October 25, 2007, 03:39:42 PM

Oshyan, oh it does and did ... The Position in Texture was the key ;-)

Oshyan · October 25, 2007, 03:48:57 PM

Ah yes - it needs to be provided the right info to function, yes?

- Oshyan

old_blaggard · October 25, 2007, 04:02:38 PM

Ah, good to know! Thanks for finding that.

Volker Harun · October 25, 2007, 04:05:12 PM

I think a get position would work when a displacement is made befor the function. Just a guess as it is the first time that I used the Position in Texture node.
Thanks for pushing me this way - even if it was not on purpose.

efflux · October 25, 2007, 04:09:12 PM

OK, I'm back.

I never tried the dot product in this set up. I will do so but what I want is an output from dot product providing a usable value of angle between light source and surface. I could not get that working.

These ray traced shadow problems are bad. I've seen a lot of renders ruined with those. For example, I've even seen it a Luc Bianco image that was otherwise a great image. I will be testing that problem out further.

I use multiply vector in a lot of these function cases where I need to transform.

Volker Harun · October 25, 2007, 04:57:25 PM

You mentioned this Dot-problem earlier ... this might be the next goal.
Here it works nice, it kills the steps and minimizes those shadows.

The multiply vector is of course something I ignored ,-)