zoomCameraCmd.py

#-
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# import maya.cmds
# maya.cmds.loadPlugin("zoomCameraCmd.py")
# maya.cmds.spZoomCamera()

import sys
import maya.OpenMaya as OpenMaya
import maya.OpenMayaUI as OpenMayaUI
import maya.OpenMayaMPx as OpenMayaMPx

kPluginCmdName = "spZoomCamera"

print "zoomCameraCmd.py has been imported...."

# command
class scriptedCommand(OpenMayaMPx.MPxCommand):
        camera = OpenMaya.MDagPath()
        def __init__(self):
                OpenMayaMPx.MPxCommand.__init__(self)

        def redoIt(self):
                global camera
                fnCamera = OpenMaya.MFnCamera(camera)
                f1 = fnCamera.focalLength()
                fnCamera.setFocalLength(f1 * 2.0)

        def undoIt(self):
                global camera
                fnCamera = OpenMaya.MFnCamera(camera)
                f1 = fnCamera.focalLength()
                fnCamera.setFocalLength(f1 / 2.0)

        def doIt(self, args):
                global camera
                camera = OpenMaya.MDagPath()    
                try:
                        OpenMayaUI.M3dView.active3dView().getCamera(camera)
                except: 
                        sys.stderr.write( "ERROR: getting camera \n" )
                else:
                        self.redoIt()

        def isUndoable(self):
                return True

#Cmd Creator
def cmdCreator():
        return OpenMayaMPx.asMPxPtr( scriptedCommand() )
                
# Initialize the script plug-in 
def initializePlugin(obj):
        plugin = OpenMayaMPx.MFnPlugin(obj)
        try:
                plugin.registerCommand( kPluginCmdName, cmdCreator)
        except:
                sys.stderr.write( "Failed to register command: %s\n" % kPluginCmdName )

# Uninitialize the script plug-in       
def uninitializePlugin(obj):
        plugin = OpenMayaMPx.MFnPlugin(obj)
        try:
                plugin.deregisterCommand(kPluginCmdName)                
        except:
                sys.stderr.write( "Failed to unregister command: %s\n" % kPluginCmdName )

        

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