workshop01G3:Codefarm

Group 3

Past Experiments

Present to Future

Code Farm

References

Python BranchingStructure_parametric

import rhinoscriptsyntax as rs
import random
import scriptcontext
# define a function called drawbranch
# the integer c in the function with a format drawbranch(a,b,c), actually, drawbranch(4,line,4)
# 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)
#make a list to store endPoints
endPoints=[]
#provide starting line for the future tree
line=rs.AddLine([0,0,0],[0,0,20])
#calling the function for the chosen values
drawbranch(4,line,3)
#icluding a random seed for variation
rndseed=random.seed(5)
#adding a layer endPoints
rs.AddLayer("endPoints")
#adding PolyLine between points in endPoints
for pt in endPoints:
    rs.ObjectLayer(pt,"endPoints")
rs.AddPolyline(endPoints, None)