Ex03B_NurbsSphere_Deborah&Claudia

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## Ex03B_Move Cvs of a Nurbs according to Locator direction
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import maya.cmds as cmds
import math

#define distance between cvs and locator
def magnitude (v):
    #v is a list of x,y,z values
    x= v[0]
    y= v[1]
    z= v[2]
    m= math.sqrt ( (x*x) + (y*y) + (z*z) )
    return m
    
def distance (posPoint, posLoc):
    #subtract both vectores
    x1= posPoint[0]
    y1= posPoint[1]
    z1= posPoint[2]
    x2= posLoc[0]
    y2= posLoc[1]
    z2= posLoc[2]
    x= x1 - x2
    y= y1 - y2
    z= z1 - z2
    m= magnitude ([x,y,z])
    return m

#define moveToLocator function
def moveToLocator():
    # A) get all the cvsNames of a NurbsPlane
    NurbsCvs = cmds.ls("nurbsSphere1.cv[:]", fl=1)
    
    #create an empty list to store the points
    MyCvs=[]
        
    #get selected Locator
    selLoc= cmds.filterExpand(sm=22)
    
    #loop through cvs
    for i in NurbsCvs:
        posPoint= cmds.pointPosition(i)
        posLoc= cmds.pointPosition (selLoc)
        d= distance(posPoint, posLoc)
        print d
        cmds.move (d,d,d,i,r=True)
        
        #store the cvs in a list
        MyCvs.append(NurbsCvs)

#call the function
moveToLocator()