Identify a class via its mesh

[EnvisMJ]

So I've been having a problem for a while, I need to identify a class object via the 3D mesh that represents it in the environment.

Example code:

import viz
import vizact

#Sample Environment
ground = viz.add('tut_ground.wrl')
ground.tag = "You missed clicking on a box."

class exampleObject(object): #Example class containing a mesh
def __init__(self,classTag,geometryTag,x,y,z,color):
self.tag = classTag
self.model = viz.add('box.wrl')
self.model.tag = geometryTag
self.model.setPosition(x,y,z)
self.model.color(color)
self.model.setScale(.333,.333,.333)

#Creating some objects
A = exampleObject("classA","geometryA",-.5,1.6,2,viz.RED)
B = exampleObject("classB","geometryB",0,1.6,2,viz.BLUE)
C = exampleObject("classC","geometryC",.5,1.6,2,viz.GREEN)

def clickPick(): #Pick an object
mesh = viz.pick()
classObject = mesh ###This line should be modified###
print classObject.tag

vizact.onmousedown(viz.MOUSEBUTTON_LEFT, clickPick) #Pick an object on Left-click

viz.go()


#The problem, how do I go from the mesh to the class object...

#As in what (function) do I need to apply to the [mesh] to return the [class object]
#Example:

def classPick(): #Pick an object, print it's class' tag
mesh = viz.pick()
classObject = mesh.(function)()
print classObject.tag

#Should print "classA" rather than "geometryA"
#Should print "classB" rather than "geometryB"
#Should print "classC" rather than "geometryC"

How do I get it to return the class object rather than the geometry?

[farshizzo]

If you have your exampleObject class inherit from the Vizard node class, then your class instance will be returned from the pick command. I modified your example to show this:import viz
import vizact

#Sample Environment
ground = viz.add('tut_ground.wrl')
ground.tag = "You missed clicking on a box."

class exampleObject(viz.VizNode): #Example class containing a mesh
def __init__(self,classTag,geometryTag,x,y,z,color):

model = viz.add('box.wrl')
viz.VizNode.__init__(self,model.id)

self.class_tag = classTag
self.geometry_tag = geometryTag
self.setPosition(x,y,z)
self.color(color)
self.setScale(.333,.333,.333)

def printTag(self):
print self.class_tag,self.geometry_tag

#Creating some objects
A = exampleObject("classA","geometryA",-.5,1.6,2,viz.RED)
B = exampleObject("classB","geometryB",0,1.6,2,viz.BLUE)
C = exampleObject("classC","geometryC",.5,1.6,2,viz.GREEN)

def clickPick(): #Pick an object
mesh = viz.pick()
if isinstance(mesh,exampleObject):
mesh.printTag()

vizact.onmousedown(viz.MOUSEBUTTON_LEFT, clickPick) #Pick an object on Left-click

viz.go()