How can I create a normal vector pointing to the nearest point...

[Masoud]

Hi guys,

As you can see in the image below, I have some scattered points on a grid and there are some points near a curve that are selected.

Now I need help on how to create a "Normal vector" on each scattered point, that is toward (pointed to) the nearest point to the point selection.

 

Thanks for helping.

 

VEX_temp_01.hip

Edited November 11, 2022 by Masoud

[Librarian]

maybe this can be of same Help otherwise try to search For Slope example or Just describe what you want to do with them Points .. you can Use Ray also ...PArticles with Groups ..I'm more for visual motion explaining Example ..Don't know

 

new.hipnc

[bunker]

you can do that with pointclouds, it's ideal for averaging out the normal directions
which is probably what you want.
 

// wrangle1
// change color by proximity to curve points
int handle = pcopen(1,"P",@P,chf("radius"),1);
if(pcnumfound(handle)>0){
    @Cd = {1,0,1};
}

// use blast nodes to separte in 2 geometries

// wrangle2
// create normals from average closest points
int handle = pcopen(1,"P",@P,chf("radius"),chi("maxpoints"));
if(pcnumfound(handle)>0){
    vector p = pcfilter(handle,"P");
    v@N = p-@P;
}

 

normal_to_points.hipnc

> using 1 point or 40 points for position lookup

Edited November 12, 2022 by bunker

[Masoud]

Hi, dear Tesan and Julien,

You are excellent. Thanks for helping!