Adjust instances to primitive size

[5hyuk1n]

Hi guys!

I'm fairly new to Houdini and would love for someone to point me in the right direction.
I'm copying objects on a quadtree plane and want to adjust the size of the instances in order to fit into each primitive. Unfortunately, I can't get the pscale value of the plane, since I'm loosing that in order to copy the objects to the center of the primitive.
I hope that makes sense and would really appreciate any tips.

Thanks,
Misha

 

recursive_subd_001.hiplc

[Atom]

Here is a basic setup. It uses a second loop to give each primitive a unique name. Inside the loop, the area for each primitive is stored as an attribute. After the loop, pscale is derived from the area.

Use the ramp and the multiplier to dial in the sizes.

ap_recursive_subd_001.hiplc

Edited July 10, 2020 by Atom

[konstantin magnus]

To fill quadratic polygons with copies just take the square root of the intrinsic primitive area as point scale:

int pt_add = addpoint(0, v@P);
float area = primintrinsic(0, 'measuredarea', i@primnum);
float scale = sqrt(area);
setpointattrib(0, 'pscale', pt_add, scale, 'set');
removeprim(0, i@primnum, 1);

 

KM_recursive_subd_001.hipnc

[5hyuk1n]

Thanks so much for the fast reply guys! all works perfectly!

[crispr_boi]

How could I animate the Y-scale of each instance randomly?

[unoccur]

In another pointwrangle:

v@scale = {1, 1, 1};
v@scale.y = rand(@ptnum);