lsysgengh.gh

import rhinoscriptsyntax as rs
import Rhino.Geometry as rg
import math
 
def generate(ptn,angle):
    objs = []
    stackVecList = []
    stackPosList = []
    stackRadList = []
    v = rg.Vector3d(0,1,0)
    p = rg.Point3d(0,0,0)
    for i in range(len(ptn)):
        if ptn[i] == 'X':
            pass#do nothing
        elif ptn[i] == 'F':
            #here we generate Rhino object
            line = rs.AddLine(p,p+v)     
            objs.append(line)
            p = p + v            
        elif ptn[i] == '+':
            rg.Vector3d.Rotate(v,math.radians(angle),rg.Vector3d(0,0,1))
        elif ptn[i] == '-':
            rg.Vector3d.Rotate(v,math.radians(-angle),rg.Vector3d(0,0,1))
        elif ptn[i] == '[':
            stackVecList.append(rg.Vector3d(v))#be careful! need stack the copy of vector
            stackPosList.append(p)
        elif ptn[i] == ']':
            v = stackVecList[-1]
            p = stackPosList[-1]
            stackVecList.pop()
            stackPosList.pop()
              
    return objs
#------------------------

a = generate(ptn,ang)