Script for slicing voxelized objects

slicer.py

#!BPY

"""
Name: 'Slicer 1.0'
Blender: 243
Group: 'Misc'
Tooltip: 'Slice voxelized object'
"""

import Blender, BPyMessages, BPyMesh
import copy
from Blender import *
from Blender.Scene import Render
from Blender.Mathutils import \
	Matrix, Vector, ProjectVecs, AngleBetweenVecs, TranslationMatrix
 
 
def trimToLayer(selected,layerNumber):
        toDelete= []
        toAdd = []

        source = getChildren(selected)
        bbox = source[0].getBoundBox()
        blockHeight = bbox[1][2] - bbox[0][2]

        offset = selected.getBoundBox()[0][2] - blockHeight/2

        mesh = selected.getData(mesh=1)
        
        tmesh = NMesh.GetRawFromObject(selected.name)
        tmesh.transform(selected.matrix)
        #Delete verticies above the current layer
        for v in tmesh.verts:
            if v.co[2] > blockHeight*layer + offset:
                toDelete.append(v.index)
        if layerNumber > 1:
                #Delete verticies below the current layer
                for v in tmesh.verts:
                    if v.co[2] < blockHeight*layer-1 + offset:
                        toDelete.append(v.index)

        #hack to filter uniques
        toDelete = list(set(toDelete))
        omesh = NMesh.GetRawFromObject(selected.name)
        for v in omesh.verts:
           if v.index in toDelete:
             toAdd.append(v.co)
               
        mesh.verts.delete(toDelete)
        snapshot(layerNumber)
        mesh.verts.extend(toAdd)
        Window.Redraw()
 

def snapshot(layer):
    scn = Scene.GetCurrent()
    context = scn.getRenderingContext()
    context.extensions = True
    context.renderPath = "C:/"
    context.imageType = Render.JPEG
    context.render()
    context.saveRenderedImage(str(layer)+".jpg")

def getChildren(obj):
   children = []
   for ob in Blender.Object.Get():
      if ob.getParent() == obj:
         children.append(ob)
   if len(children) != 0: return children
   else: return None 
 
##################3
if __name__ == "__main__":
    selection = Object.GetSelected();
    layers = Draw.PupIntInput("LayersS",1,0,100)
    Blender.SaveUndoState('Kill Everything')  
    print "\nTrimming First Layer"
    for s in selection:
      for layer in range(1,layers):
        trimToLayer(s,layer)