zoomCameraCmd.py

#-
# ==========================================================================
# Copyright (C) 1995 - 2006 Autodesk, Inc. and/or its licensors.  All 
# rights reserved.
#
# The coded instructions, statements, computer programs, and/or related 
# material (collectively the "Data") in these files contain unpublished 
# information proprietary to Autodesk, Inc. ("Autodesk") and/or its 
# licensors, which is protected by U.S. and Canadian federal copyright 
# law and by international treaties.
#
# The Data is provided for use exclusively by You. You have the right 
# to use, modify, and incorporate this Data into other products for 
# purposes authorized by the Autodesk software license agreement, 
# without fee.
#
# The copyright notices in the Software and this entire statement, 
# including the above license grant, this restriction and the 
# following disclaimer, must be included in all copies of the 
# Software, in whole or in part, and all derivative works of 
# the Software, unless such copies or derivative works are solely 
# in the form of machine-executable object code generated by a 
# source language processor.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND. 
# AUTODESK DOES NOT MAKE AND HEREBY DISCLAIMS ANY EXPRESS OR IMPLIED 
# WARRANTIES INCLUDING, BUT NOT LIMITED TO, THE WARRANTIES OF 
# NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR 
# PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE, OR 
# TRADE PRACTICE. IN NO EVENT WILL AUTODESK AND/OR ITS LICENSORS 
# BE LIABLE FOR ANY LOST REVENUES, DATA, OR PROFITS, OR SPECIAL, 
# DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES, EVEN IF AUTODESK 
# AND/OR ITS LICENSORS HAS BEEN ADVISED OF THE POSSIBILITY 
# OR PROBABILITY OF SUCH DAMAGES.
#
# ==========================================================================
#+


# 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 )