#fantastic stairs
import rhinoscriptsyntax as rs
import random as ran

#delete everything and start from scratch
rs.DeleteObjects(rs.AllObjects())

#create a box
def make_box(insertion=[0,0,0], xsize=10,ysize=10,zsize=10):
    corners = [[0,0,0],[xsize,0,0],[xsize,ysize,0],[0,ysize,0],[0,0,zsize],[xsize,0,zsize],[xsize,ysize,zsize],[0,ysize,zsize]]
    box=rs.AddBox(corners)
    rs.MoveObject(box, (-xsize/2,-ysize/2,0))
    rs.MoveObject(box, insertion)
    return(box)

p_num = 20
#crv = rs.AddLine([0,0,0], [100,0,50])
#crv = rs.AddPolyline([[0,0,0], [50,0,50], [70,40,20],[100,0,0]])
crv = rs.AddCurve([[0,0,0], [50,0,50], [70,40,20],[100,0,0]],3)
#rs.RebuildCurve(crv, 3, p_num)
c_len = rs.CurveLength(crv)
seg_len = c_len/p_num
print seg_len
pts=rs.DivideCurveEquidistant(crv, seg_len, create_points=True, return_points=True)


print c_len
#pts = rs.CurvePoints(crv)

for p in pts:
    rs.AddCircle(p, seg_len)
    param = rs.CurveClosestPoint(crv, p)
    normal = rs.CurveTangent(crv, param)
    t_angle = rs.Angle([0,0,0], normal)[0]
    box=make_box(p, xsize=seg_len,ysize=4*seg_len,zsize=seg_len/4)
    rs.RotateObject(box, p,t_angle, [0,0,1])