rhino python script move object

Question

i'm going to script a code to get 2 dimension and draw a rectangel then repeat that u-times by rotating and moving it.and present all rectangels.. i've wrote this:

 #start
import rhinoscriptsyntax as rs
#set the work plane
plane = rs.WorldXYPlane()
#draw a rectangel 
a=rs.AddRectangle( plane, x, y )

#set a module to repeat rectangels 
c=[]
for i in range(u):
    plane = rs.RotatePlane(plane, i+2.0, [0,0,1])
    c=c.append(rs.AddRectangle(plane, x, y ))
    d=rs.MoveObject(c[i],(0,0,1))

it declare this error:

Runtime error (TypeErrorException): 'NoneType' object is not subscriptable

Traceback:
  line 13, in script

how i can fix it?

`c.append` returns `None`. You don't need to reassign `c`, calling append should mutate the existing list — byxor, May 23 '23 at 15:41

urbancomputing207 · Accepted Answer · 2023-05-24T18:19:59.877

The error is from c=c.append(rs.AddRectangle(plane, x, y )) As @byxor commented, and should simply be c.append(rs.AddRectangle(plane, x, y ))

There are several other issues with the code that may cause side effects based on your stated goal.

a=rs.AddRectangle( plane, x, y ) is assigned but not used. If you are scripting in grasshopper and using a as the default output, you will only get a single rect as a result.
plane = rs.RotatePlane(plane, i+2.0, [0,0,1]) is re-using plane so you will get a double increment with i+2.0 (prior rotation plus new rotation). This is not necessarily wrong, but a bit less intuitive than i*2.
d=rs.MoveObject(c[i],(0,0,1)) moves your item, but d is not returned and is overwritten by the next iteration. Also, you are moving all items to the same location and if you want increasing movement, you need an incrementor like (0,0,1*i).

Bellow is an example that is a bit more clear, and assumes X,Y are float and U is a int with a the grasshopper script component output.

Working Example:

#Imports.
import rhinoscriptsyntax as rs

#Set the work plane.
plane = rs.WorldXYPlane()

#Create Output Array. 
c=[]

#Create rectangles.
for i in range(u):
    #Rotate by increasing increments
    newPlane = rs.RotatePlane(plane, i*2.0, [0,0,1])
    #Create rectangle.
    rect = rs.AddRectangle(newPlane, x, y )
    #Move rectange by increasing increments.
    rs.MoveObject(rect,(0,0,1*i))
    #Add final rectangle to output list.
    c.append(rect)

#Return final List.
a = c

hello dear @byxor .thank you for your complete attention. I wrote it on grasshopper and x,y,u had number sliders and (a) was the output. anyway I found the answer and in addition i rotate rectangels insted of their planes... — Zahra Ramezani, May 27 '23 at 06:44

rhino python script move object

1 Answers1

Working Example: