amplitude in python

what would the equivalent command be to amplitude for adding length to a vector? Thanks

Replies to This Discussion

Permalink Reply by Ethan on June 5, 2015 at 12:17am

a better question would be how do I factor a vector, so take a vector and multiply by itself a number of times. I tried vec=vector**4 but get

Runtime error (TypeErrorException): unsupported operand type(s) for **: 'Vector3d' and 'int'

Permalink Reply by Anders Holden Deleuran on June 5, 2015 at 9:02am

The correct syntax is using just one *. Like so:

import Rhino as rc

myVec = rc.Geometry.Vector3d(0,0,1)
myVec = myVec * 2

print myVec.Length

Or:

import Rhino as rc

myVec = rc.Geometry.Vector3d(0,0,1)
myVec *= 2

print myVec.Length

You also can add, subtract etc. using mathematical operators (+,- etc.). You can read more about this in the RhinoCommon SDK.

Permalink Reply by Ethan on June 6, 2015 at 9:24am

thanks!

Permalink Reply by 筑梦NARUTO on June 5, 2015 at 1:19am

Hi Ethan

You can use rs. VectorScale () function,Check the attached file

Attachments:

vector.gh, 6 KB

Permalink Reply by Ethan on June 5, 2015 at 1:37am

Thanks naruto that is really helpful. I will study it! I worked around the issue by using a for loop. I am trying to dig deeper in to looping and working with python. After scaling the vector i am trying to say, iterate through this vector by increasing scale until the distance is greater than a number... then choose the one just below that... I have it almost working but not sure how to nest an if in a for loop to say if this is condition is met stop the loop... Thanks!

import rhinoscriptsyntax as rs
list = []
for num in range (number):

m = rs.MoveObject(x,y)
pt2 = rs.CurveStartPoint(x)
dist = rs.Distance(pt,pt2)
list.append(m)
if dist < 30:
return
a = lis

Permalink Reply by 筑梦NARUTO on June 5, 2015 at 1:45am

Can you upload your file?

Permalink Reply by Ethan on June 5, 2015 at 1:49am

thanks for your help. I'm also curious why this list num slider doesn't seem to affect the output. i thought it worked like list item where i could choose which item in the list i want...? Thanks so much

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