Aw: Re: [Nuke-python] getGeometry function error on pythonDevGuide example

Fri, 24 Apr 2015 09:40:28 -0700

geoNode = nuke.activeViewer().getGeometryNodes()

print geoNode

[<Cube1 at 0x3c78e10>]

how can i get from the cube object the geometryList


doing that gives me the list? but i don't go through the viewer which would be nice.

n = nuke.toNode("Cube1")
k = n['geo_select']
objs = k.getGeometry()
print objs

<_geo.GeometryList object at 0x654dcf0>

 

doing a FIX from that code http://docs.thefoundry.co.uk/nuke/90/pythondevguide/math.html?highlight=rotopaint works

import nuke
import nukescripts

def paintPoints():
    '''
    Rather experimental but kinda fun. This projects sleected 3D points through a camera ito screen space
    and draws a dot for each using a paint stroke.
    '''
    # GET THE GEO NODE FROM THE CURRENTLY ACTIVE VIEWER
    geoNode = nuke.activeViewer().getGeometryNodes()

    # WE EXPECT A CAMERA TO BE SELECTED
    camera = nuke.selectedNode()
    if not camera.Class() in ( 'Camera', 'Camera2' ):
        nuke.message( 'Please select a camera node first')
        return

    # COLLECT ALL OBJECTS IN THE CURRENT GEO KNOB. QUIT IFNONE WERE FOUND
    #geoKnob = geoNode['geo']
    #objs = geoKnob.getGeometry()
    
    #FIX
    n = nuke.toNode("Cube1")
    k = n['geo_select']
    objs = k.getGeometry()
    #FIX

    #objs = geoNode

    if not geoNode:
        nuke.message( 'No geometry found in %s' % geoNode.name() )

    pts = []
    for o in objs:
        # CYCLE THROUGH ALL OBJECTS
        objTransform = o.transform()
        for p in o.points():
            # CYCLE THROUGH ALL POINTS OF CURRENT OBJECT
            worldP = objTransform * nuke.math.Vector4(p.x, p.y, p.z, 1)
            pts.append( [worldP.x, worldP.y, worldP.z] )

    # CREATE THE NODE THAT WILL HOLD THE PAINT STROKES
    curvesKnob = nuke.createNode( 'RotoPaint' )['curves']
    # PREP THE TASK BAR
    task  = nuke.ProgressTask( 'painting points' )
    
    for i, pt in enumerate( pts ):
        if task.isCancelled():
            break
        task.setMessage( 'painting point %s' % i )
        # CREATE A NEW STROKE
        stroke = nuke.rotopaint.Stroke( curvesKnob )
        # PROJECT THE POINT TO SCREEN SPACE
        pos = nukescripts.snap3d.projectPoint( camera, pt )
        # CREATE ANE CONTROL POINT FOR
        ctrlPoint = nuke.rotopaint.AnimControlPoint( pos )
        # ASSIGN IT TO THE STROKE
        stroke.append( ctrlPoint )
        # ASSIGN TH E STROKE TO THE ROOT LAYER
        curvesKnob.rootLayer.append( stroke )
        # UPDARE PROGRESS BAR
        task.setProgress( int( float(i)/len(pts)*100 ) )

paintPoints()
 
Gesendet: Mittwoch, 22. April 2015 um 16:24 Uhr
Von: "Frank Harrison" <fr...@thefoundry.co.uk>
An: "Nuke Python discussion" <nuke-python@support.thefoundry.co.uk>
Betreff: Re: [Nuke-python] getGeometry function error on pythonDevGuide example
That's not good.
 
It looks like we deprecated that Knob some time ago, I'll talk to our resident Nuke 3D system specialist and try to get back to you. 
 
In the mean-time, have you tired using the getGeometryNodes() function on the Viewer Node?
 
F.
 
 
On 22 April 2015 at 20:48, Thorsten Wolf <thorsten.v.w...@web.de> wrote:
hi,
 
 
getting the following error.
 

objs = geoKnob.getGeometry()

AttributeError: 'Obsolete_Knob' object has no attribute 'getGeometry'

 
how can i get the getGeometry values ?
 
thanks 
thorsten

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--
Frank Harrison
Senior Nuke Software Engineer
The Foundry
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