alexmajewski
Say we start with an irregular 4-sided UV island, and our goal would be to pull its 4 points to desired new positions and straighten out the boundary edge.

What technique/concept could be used that would distribute their internal points proportionally to the deformations performed on the boundary edge? (assuming it's even a multi-step process)

Image Not Found

litote
I might ask a question about the foreach loop part once I try to follow the setup as it is a bit hard fro me to follow.

litote
I am unfamiliar with a couple of the nodes you used. Could you please run through what is happening in the For Each loop step by step?

Also, can you explain what the Connect Adjacent Pieces and the RBD Convert Constraints (both connected) are doing, precisely?

litote
I had expected you to use the RBD Constraint Properties node to use the RBD Cluster node's intracluster and clustertocluster groups in its Constraint Group field, as I have see them used with the SOP level RBD Bullet Solver). Is this not possible for use in a DOP Network set up? Is this why you have instead created your own cluster groups?

64669804
I want to remove the selected points in Figure 1 (these points have been defined in the group) but keep the lines. I hope it looks like picture 2 after removing. I tried 'remove inline points', but it didn't work as expected.

int pts[]=expandpointgroup(0,'group1');
int nb_pts2[];
string edges='',edge;

//
foreach(int pt;pts)
{
    int nb_pts[]=neighbours(0,pt);
    for(int i=0;i<len(nb_pts);i++)
    {
        int ingrp=inpointgroup(0,'group1',nb_pts[i]);
        if(!ingrp)
            {   
                pop(nb_pts,i);
            }
        else
            push(nb_pts2,nb_pts[i]);
    }
    //printf('%d\n',len(nb_pts));
    
    //
    int pt_nb0=nb_pts[0];
    int pt_nb1=nb_pts[1];
    vector pos0=point(0,'P',pt_nb0);
    vector pos1=point(0,'P',pt_nb1);
    vector cur_pos=point(0,'P',pt);
    vector dir0=normalize(pos0-cur_pos);
    vector dir1=normalize(pos1-cur_pos);
    
    float angle=degrees(acos(dot(dir0,dir1)));
    setpointattrib(0,'angle',pt,angle,'set');
    if(angle>175)
    {
        setpointgroup(0,'smooth_pts',pt,1,'set');
    }
    
}