Divide curve by ratio in Python Rhinoscript

Scripting
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1

Hi, can someone please help me in writing python code to divide a curve length by ratio? I want to divide a line and have points at 10%, 25%, 25%, 30%, and 10% of the total length.

2

Hello - here is a quick test - is that what you need?

import Rhino
import rhinoscriptsyntax as rs
import scriptcontext as sc

def test():
    
    while True:
        pct = 10
        if sc.sticky.has_key('DIV_PCT'):
            pct = sc.sticky['DIV_PCT']
        go = Rhino.Input.Custom.GetObject()
        go.GeometryFilter = Rhino.DocObjects.ObjectType.Curve
        go.SubObjectSelect=True
        opPct = Rhino.Input.Custom.OptionDouble(pct,.01, 100)
        go.AddOptionDouble('Percent',opPct)
        go.AcceptNumber(True, False)
        
        rc = go.GetMultiple(1,0)
        
        if go.CommandResult()!=Rhino.Commands.Result.Success:
            return go.CommandResult()
            
        if rc==Rhino.Input.GetResult.Object:
            ids = [go.Object(i).ObjectId for i in range(go.ObjectCount)]
            objs = [go.Object(i)  for i in range(go.ObjectCount)]
            crvs = [obj.Curve() for obj in objs] 
            break
            
        elif rc==Rhino.Input.GetResult.Option:
            pct = opPct.CurrentValue
            sc.sticky['DIV_PCT'] = pct
            continue
        elif rc==Rhino.Input.GetResult.Number:
            pct = go.Number()
            if pct > 100:
                print 'Enter a number less than 100'
                continue
            sc.sticky['DIV_PCT'] = pct
            continue
            
            
    div = pct/100
    for crv in crvs:
        length = crv.GetLength()
        pars = crv.DivideByLength(length*div, False)
        pts = [crv.PointAt(par) for par in pars]
        rs.AddPoints(pts)

test()

-Pascal

3

Thanks Pascal, for your quick response. Your code generated something that looks like image 1, I want to be able to generate something that looks like image 2.

Can you please help me with that?

1
1774×864 103 KB

2
2965×1073 37.2 KB

Thanks,
Maryam

4

Here is a quick sample, Try this:

import Rhino
import rhinoscriptsyntax as rs
import scriptcontext as sc

crvid = rs.GetObjects("Select Curve", rs.filter.curve, False, False, None, False)
crv = rs.coercecurve(crvid, -1, False)
length = crv.GetLength()
pct = 0
while pct < 1:
    input = rs.GetInteger("Enter Percentage Number", None, 0, 100)
    div = input/100 + pct
    divide = crv.DivideByLength(length*div, False)
    pt = crv.PointAtLength(divide[0])
    rs.AddPoint(pt)
    pct = div

Select Curve and then enter percentage u need (10, 25, 25, 30), it will add the points!