Point cloud density

Replies to This Discussion

Permalink Reply by Mateusz Zwierzycki on May 12, 2012 at 11:23am

like that ?

Permalink Reply by richie hawtin on May 12, 2012 at 12:07pm

Hi   Mateusz!

thanx alot for your reply!!!

Yes what you posted seems to do the job. I gues if i need a height field i should conect the square root to a parameter that affects a height...

 

the only problem i have now  is this : would you know why?

 

thanx alot man!!

Permalink Reply by richie hawtin on May 12, 2012 at 12:18pm

Actually i found it, i had to set the u  boolean true in the BBOX component!

Thanx again!!!

Permalink Reply by richie hawtin on May 12, 2012 at 12:42pm

hey one more thing,

 

The definition you posted works when the points are on the same plane. Is it possible to make this work if the point cloud is randomly placed in xyz, and not on the same plane?

and if yes would you know how i could translate that into a 3d mesh that will represent a height field linked to the density of the points?

 

thanx again!!!!!

Permalink Reply by Mateusz Zwierzycki on May 12, 2012 at 1:20pm

how do you see translating Z values of point cloud - is point cloud fully projected onto one plane, or plane is kind of cross-section ?

Permalink Reply by richie hawtin on May 12, 2012 at 1:30pm

well i gues i could project them on a plane, the only problem with that is if you have points that have the same x,y but different z there wont be possible to count them in. 

 Could you please sugest a way that i could recrete  a mesh  over the projected plane where the z coordinates of it would  be heigher  where the points are denser?

 

thanx again, you are very helpfull!!

Permalink Reply by Mateusz Zwierzycki on May 12, 2012 at 1:49pm

1. point with same x&y values will be counted, cause there would be 2 same point and closest points component will work with it and count them twice.

2. projecting is really simple - decompose points and create new without z value (point xyz component)

3. mesh heightfield is also simple to make now - take V output (vertices) from mComp component, move them by Z vector which lenght = values from gradient, multiply vectors by some value and plug it to last component (mesh)

Permalink Reply by richie hawtin on May 12, 2012 at 2:00pm

Did it and works perfectly!

Thanx so much!!!!