create lines from point cloud to center point

[logix1390]

Hello

I have a bit of an interesting problem. I have a bunch of small point clouds and I want to create a line from each point to the center point. Each point cloud has its own id. The center point has a matching id . I thought using an addprim function would do the trick but its not working... I have something like this:
 

if(i@id==i@idt){
   int prm = addprim(0, "polyline", i@id, i@idt);
   int vtx = addvertex(0, prm, @ptnum);
   
}

I will attach my file for anyone that wants to take a look.

Thanks

create_line_point_cloud.hip

[vicvvsh]

Hi,

your id and idt attributes do nothing, you forgot to define them. But it can work even now if you do two things:

1. Change order of inputs on the merge6 node - from CENTER  first and from PT_CLOUD second.

2. Past into "create_lines_..." wrangle this code:

int count = findattribvalcount(0, "point", "sourcept", @ptnum);
if(count > 0) {
    int pts[] = findattribval(0, "point", "sourcept", @ptnum);
    foreach(int pt; pts) {
        int prm = addprim(0, "polyline", @ptnum, pt);
    }
}

After these changes it should work

[logix1390]

@vicvvshThis is great, thanks a lot. I broke down your code line by line and it makes complete sense now. appreciate the help