python script for blender: select every nth vertex of a mesh

i learnt python today. love it.  much like blender in quirkiness factor.  wrote this simple script to do just what it say it do:

#!BPY
“”"
Name: ‘Select Every Nth Vert’
Blender: 244
Group: ‘Mesh’
Tooltip: ‘Selects every nth vertex of active mesh’
“”"
#12/21/07 dustractor@gmail.com

import Blender

from Blender.BGL import *
from Blender.Draw import *
from Blender.Window import *
from Blender.Mesh import *
import BPyMessages
import bpy

# Events
EVENT_NOEVENT = 1
EVENT_DRAW = 2
EVENT_EXIT = 3
global ator
global initator
initator=2
######################################################
# GUI drawing
######################################################
def draw():
global ator, initator

global EVENT_NOEVENT,EVENT_DRAW,EVENT_EXIT

########## Titles
glClear(GL_COLOR_BUFFER_BIT)
glRasterPos2d(8, 103)
Text(“selection iterator”)

######### Parameters GUI Buttons
glRasterPos2d(8, 83)
Text(“Parameters:”)
ator = Number(“ator: “, EVENT_NOEVENT, 10, 55, 210, 18,
initator, 2, 99, “Number to iterate by “);

######### Draw and Exit Buttons
Button(“Draw”,EVENT_DRAW , 10, 10, 80, 18)
Button(“Exit”,EVENT_EXIT , 140, 10, 80, 18)
def event(evt, val):
if (evt == QKEY and not val):
Exit()

def bevent(evt):
global ator,initator
global EVENT_NOEVENT,EVENT_DRAW,EVENT_EXIT
######### Manages GUI events
if (evt == EVENT_EXIT):
Exit()
elif (evt== EVENT_DRAW):
initator=ator.val
theIteration()

Register(draw, event, bevent)

######################################################
# Main Body
######################################################
def theIteration():
global ator
iter=0
t = Blender.sys.time()
sce = bpy.data.scenes.active
ob_act = sce.objects.active
if not ob_act or ob_act.type != ‘Mesh’:
BPyMessages.Error_NoMeshActive()
return
is_editmode = Blender.Window.EditMode()
if is_editmode:
Blender.Window.EditMode(0)
Blender.Window.WaitCursor(1)
theMesh = ob_act.getData(mesh=1)
for v in theMesh.verts:
iterator=iter%ator.val
iter+=1
if iterator==1:
v.sel=1
if iterator==0:
v.sel=0

if is_editmode:
Blender.Window.EditMode(1)
print ‘My Script finished in %.2f seconds’ % (Blender.sys.time()-t)
Blender.Window.WaitCursor(0)
Redraw()

~ by distroid on December 22, 2007.