Create Point cloud from geometry.

General TouchDesigner Discussion
1

I want to make a 3d point cloud from 3d SOP.
like upload.wikimedia.org/wikipedia/c … _torus.gif
I saw many questions about create mesh from point cloud but it`s very hard to find about this topic.

I have no idea where to begin. Do I need polygon or mesh data or something?
Are there were any algorithm for this let me help.
thanks.

2

Your best bet to create something like the example you linked is to use Houdini and the scatter SOP to create a set of points based on a surface. Everything you need for this is available in the free version of Houdini.

Steve delineates this techniques here:
[url]evil space flame - Gallery - TouchDesigner forum

There is no functionality quite like this as a built in SOP in TouchDesigner.

3

Ive just added a method to our Prim class:

Prim.eval(u,v)->Position

This will return the position on the primitive given u,v coordinates.

This will work for all primitive types, though the v is unused in the case of curves, polygons.
(See attached screenshot and toe file, for a Script SOP example).

This will be available in the next official + experimental releases.

Cheers,
Rob.
z_scatter.4.toe (4.05 KB)

scatter.jpg
scatter.jpg1368×994 211 KB

4

Wow. Thank you Rob.
That’s a really good news.
I can hardly wait for new version to use that function. :slight_smile:

5

FATASTIQUE !
GREAT ROB

6

i wonder, if there is a way to scatter points inside a geo?
something like in this tutorial [url]https://vimeo.com/231315378[/url]

is something like this possible in td with sops and scripts or do i need to go the glsl way?

7

To scatter points inside a geo you need a volume.