Polar array

Scripting
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1

Hey I’m new to rhinoscripting and I’m just wonder if there is a way to polar array something around a point in python? I’ve looked at the polar() command and it looks it is meant to do something else

2

Welcome,

Here’s an example on how to convert cartesian to polar coordinates and vis versa:


import Rhino.Geometry as rg
import math

def to_polar(x, y):
    """Returns a radius and angle in radians from xy-coordinates."""
    return (x**2 + y**2)**0.5, math.atan2(y, x)

def to_cartesian(r, delta):
    """Returns xy-coordinates from a radius and angle in radians."""
    return r * math.cos(delta), r * math.sin(delta)

angle = 0.0
step = 0.1
radius = 10.0

points = []

while angle < 2 * math.pi:
    x, y = to_cartesian(radius, angle)
    points.append(rg.Point3d(x, y, 0.0))
    angle += step

The generated points will be organized in a circular manner.

This all happens in the XY-plane. If you want to be able to change the plane, you can transform the points from the XY-plane to another plane.

1 Like
3

thanks for the help