scaling object with python and break condition

by Calavritinos

Oct 23, 2017

Goodevening to everyone,

i am going to ask you all a very basic question but i am starting to code with python these days.

i should need to scale an object (uniform scale) till it reach a set volume value to stop, reading wich scaling factor has been used.

following what i've done so far:

mesh = x

center = rs.MeshVolumeCentroid(x)

scaling_factor = 0

target_volume = 400

while scaling_factor < 10000:

         LOOP = rs.scaleObject(x,center,scaling_factor)

         if rs.MeshVolume(LOOP) == target_volume:

                  break

         a = LOOP

Hope you can help me. I am trying to translate a grasshopper definition made with ANEMONE into python.

Thank you very much in advance

Nick

  • up

    Tom Svilans

    The volume will never (or extremely rarely) be exactly 400, so you have to check when it goes over (>= instead of ==). Then just output the scaling_factor and the temp object as well if you wish.

    You also have to choose how your scaling factor will grow... Will it grow linearly? Or exponentially?

    center = rs.MeshVolumeCentroid(x)

    scaling_factor = 1.0

    target_volume = 400.0

    temp = x

    while scaling_factor < 10000.0:

        temp = rs.scaleObject(temp, center, scaling_factor)

        if rs.MeshVolume(temp) >= target_volume:

            break

        scaling_factor = scaling_factor * 1.1

    a = scaling_factor

    Oct 24, 2017