3D Texture Mapping in the Foundry Nuke

Here's a Nuke's Python script for creating a camera’s projection matrix and using paint strokes as a texture map. The idea behind it, is to project 3D texture of all objects in the Viewer to screen space through the currently selected camera using paint strokes.

Method .getGeometry() isn't working.

How to fix it?

Here's a code:

import nuke
import nukescripts

def paintPoints():

    geoNode = nuke.activeViewer().node()       
    camera = nuke.selectedNode()

    if not camera.Class() in ('Camera', 'Camera2'):
        nuke.message('Por favor, seleccione un nodo de la cámara primera')
        return

    geoKnob = geoNode['geo']
    objects = geoKnob.getGeometry()

    if not objects:
        nuke.message('No se han encontrado geometría en %s' % geoNode.name())

    pts = []

    for o in objects:    
        objTransform = o.transform()

        for p in o.points():    
            worldP = objTransform * nuke.math.Vector4(p.x, p.y, p.z, 1)
            pts.append([worldP.x, worldP.y, worldP.z])

    curvesKnob = nuke.createNode('RotoPaint')['curves']
    task  = nuke.ProgressTask('painting points')

    for i, pt in enumerate(pts):
        if task.isCancelled():
            break

        task.setMessage('painting point %s' % i)
        stroke = nuke.rotopaint.Stroke(curvesKnob)
        pos = nukescripts.snap3d.projectPoint(camera, pt)
        ctrlPoint = nuke.rotopaint.AnimControlPoint(pos)
        stroke.append(ctrlPoint)
        curvesKnob.rootLayer.append(stroke)
        task.setProgress(int(float(i)/len(pts)*100))

paintPoints()