workshop01G3:Codefarm
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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)