workshop01G3:Codefarm

Group 3

Objectives

Prototypes

Code Farm

References

import rhinoscriptsyntax as rs import random import scriptcontext

1. define a function called drawbranch
2. the integer c in the function with a format drawbranch(a,b,c), actually, drawbranch(4,line,4)
3. m is a parameter to avoid having to manually change

def drawbranch(x,line,m):

   #introduce possibility to use 'escape' key to avoid computer crash
   scriptcontext.escape_test()
   #define a condition to exit from funtion drawbranch, essentially increasing the i
   if x==0:
       return 
   else:
       for i in range (0,m):
           # get start and end points of a starting curve, first curve that will be drawn
           endpt=rs.CurveEndPoint(line)
           srtpt=rs.CurveStartPoint(line)
           #create a vector between the endpoint and the startpoint of the initial curve
           vect=rs.VectorCreate(endpt,srtpt)
           #get 3 random integer which will be used as a degree of rotation for the initial curve,these vectors will draw the branch
           rnd=random.randint(-35,35)
           rnd1=random.randint(-15,15)
           rnd2=random.randint(-5,15)
           #3D-rotate the vector with values got from random
           vect=rs.VectorRotate(vect,rnd,[rnd1,rnd2,1])
           #add a point at the end of the 3D vector
           ptadd=rs.PointAdd (endpt,vect)
           #add a line between the endPoint of the vector and the newly added point
           line=rs.AddLine (endpt,ptadd)
           #INSIDE THE FOR-LOOP, WRITE A CONDITION FOR ADDING POINTS, BUT ONLY AT THE END OF THE LAST BRANCH
           #IF YOU PROVIDE A LOW NUMBER OF ITERATIONS, IT WILL BECOME RECOGNISEABLE THAT THE CONDITION FOR DRAWING THE LAST BRANCH OF EVERY ITERATION 
           #IS WHEN X==1 AND I==THE END OF THE PROVIDED RANGE(m)-1
           if x==1 and i==m-1:
               #if condition is met, add points at the end of the branch
                   e=rs.AddPoint(ptadd)
                   endPoints.append(e)
                   #calling the function THIS IS WHEN THE ACTUAL BRANCH IS DRAWN
           drawbranch(x-1,line,m)

1. make a list to store endPoints

endPoints=[]

1. provide starting line for the future tree

line=rs.AddLine([0,0,0],[0,0,20])

1. calling the function for the chosen values

drawbranch(4,line,3)

1. icluding a random seed for variation

rndseed=random.seed(5)

1. adding a layer endPoints

rs.AddLayer("endPoints")

1. adding PolyLine between points in endPoints

for pt in endPoints:

   rs.ObjectLayer(pt,"endPoints")

rs.AddPolyline(endPoints, None)