Carving infinite spiral

[flcc]

Hi guys,
I try to carve an infinite golden Spiral. The final goal is to make an infinte zoom.
The spiral is build recursively in a for-loop.
Then I create some groups to carve each "iteration" successively.
This is where I get stuck. I can almost do it but I don't know how to keep the state of the shapes that have been already carved.
Don't know how to explain better. There is a file if some want to take a look.
I have tried different solutions including another forloop, but don't find the solution for now.
 

InfiniteSpiralCarve.hipnc

Edited June 20, 2021 by flcc

[Librarian]

hm If we can make somehow in the loop prim-length and measure together ..
 

void adjustPrimLength(const int geo, prim; const float currentlength, targetlength)
{
    float diff = targetlength - currentlength;
    int points[] = primpoints(geo, prim);
    if(diff > 0)
    {
        vector posA = point(geo, "P", points[-2]);
        vector posB = point(geo, "P", points[-1]);
        vector posC = diff * normalize(posB-posA) + posB;
        int ptnum = addpoint(geo, posC);
        addvertex(geo, prim, ptnum);
    }
    else if(diff < 0)
    {
        vector lastpos = 0;
        float length = 0;
        int cut = 0;
        foreach(int idx; int pt; points)
        {
            vector pos = point(geo, "P", pt);
            if(idx > 0 && !cut)
            {
                float seglength = distance(pos, lastpos);
                if(length+seglength > targetlength)
                {
                    float frac = (targetlength-length)/seglength;
                    vector newpos = lerp(lastpos, pos, frac);
                    int ptnum = addpoint(geo, newpos);
                    for(int i=idx; i<len(points); i++)
                        removepoint(geo, points[i]);
                    addvertex(geo, prim, ptnum);
                    break;
                }
                length += seglength;
            }
            lastpos = pos;
        }

#include <groom.h>
adjustPrimLength(0, @primnum, @perimeter, @perimeter*chf("dist"));

@Aizatulin when he Have Time   ...he have those vex-tricks and knowledge  in the Little Finger
@flcc I'm also interested in this ....

[Aizatulin]

Hi,

is this coming close to what you are trying to achieve?

InfiniteSpiralCarve_mod.hipnc

[flcc]

@Aizatulin
Thank you very much
Perfect, this is exactly what I was looking for.
I understand what you did but I don't think I could have done it by myself.
I'm not very comfortable with for loops.
I would have had a hard time doing it this way since, since I didn't even think of using my class attribute in the piece attribute field of the block end.
But now I got it ! Ahah

@Librarian
Thanks Tesan, it seems interesting, but I prefer a solution close to what I had already tried to implement.
But I'll take a look once I'm not in the rush anymore.

Edited June 20, 2021 by flcc