1.5.6#- # ========================================================================== # 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instructions, statements, computer programs, and/or related # material (collectively the "Data") in these files contain unpublished # information proprietary to Autodesk, Inc. ("Autodesk") and/or its # licensors, which is protected by U.S. and Canadian federal copyright # law and by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. # # ========================================================================== #+ # # Description: # Demonstrates how to create your own custom image plane based on # Maya's internal image plane classes. This allows API users to # override the default Maya image plane behavior. This class works # like typical API nodes in that it can have a compute method and # can contain static attributes added by the API user. This # example class overrides the default image plane behavior and # allows users to add transparency to an image plane using the # transparency attribute on the node. Note, this code also # illustrates how to use MImage to control the floating point # depth buffer. When useDepthMap is set to true, depth is added # is added to the image such that half of the iamge is at the near # clip plane and the remaining half is at the far clip plane. # # Note, once the image plane node has been created it you must # attached it to the camera shape that is displaying the node. # Image planes are attached to cameras via the imagePlane message # attribute on the camera shape. To attach this example image # plane you should connect the image plane's message attribute to # the cameraShapes imagePlane attribute. Note, the imagePlane # attribute is a multi attribute and can hold references to # multiple image planes. # # Usage: # # Run the script: # # import maya # maya.cmds.loadPlugin("customImagePlane.py") # imageP = maya.cmds.createNode("spCustomImagePlane") # maya.cmds.connectAttr( imageP + ".message", "perspShape.imagePlane[0]", force = True ) # # Then assign an image to the customImagePlane node # import maya.OpenMaya as OpenMaya import maya.OpenMayaMPx as OpenMayaMPx import sys kPluginNodeTypeName = "spCustomImagePlane" kPluginNodeId = OpenMaya.MTypeId(0x87016) # Node definition class customImagePlane(OpenMayaMPx.MPxImagePlane): # class variables aTransparency = OpenMaya.MObject() # internal variables fTransparency = 0.0 def __init__(self): OpenMayaMPx.MPxImagePlane.__init__(self) def getInternalValueInContext( self, plug, handle, context ): if plug == self.aTransparency: handle.setDouble( self.fTransparency ) return True return OpenMayaMPx.MPxImagePlane.getInternalValueInContext( self, plug, handle, context ) def setInternalValueInContext( self, plug, handle, context ): if plug == self.aTransparency: self.fTransparency = handle.asDouble() self.setImageDirty() return True return OpenMayaMPx.MPxImagePlane.setInternalValueInContext( self, plug, handle, context ) def loadImageMap(self, fileName, frame, image): try: image.readFromFile(fileName) # get the width and height of the image an MScriptUtil is needed # to pass in a pointer to the MImage::getSize() method scriptUtil = OpenMaya.MScriptUtil() widthPtr = scriptUtil.asUintPtr() heightPtr = scriptUtil.asUintPtr() scriptUtil.setUint( widthPtr, 0 ) scriptUtil.setUint( heightPtr, 0 ) image.getSize( widthPtr, heightPtr ) width = scriptUtil.getUint(widthPtr) height = scriptUtil.getUint(heightPtr) size = width * height # Implement transparency charPixelPtr = image.pixels() for i in range( 0, size, 4 ): alphaIndex = (i*4)+3 alpha = OpenMayaScript.getCharArrayItem(charPixelPtr,alphaIndex) OpenMayaScript.setCharArray( alpha * (1.0 - self.fTransparency), alphaIndex ) # Implement use depth map thisNode = self.thisMObject() fnThisNode = OpenMaya.MFnDependencyNode(thisNode) useDepthMap = fnThisNode.attribute("useDepthMap") depthMap = OpenMaya.MPlug( thisNode, useDepthMap ) value = depthMap.asBool() if value: buffer = [] c = 0 for i in range( 0, height ): for j in range( 0, width ): if i > height/2.0: buffer.insert(c, -1.0) else: buffer.insert(c, 0.0) c+=1 depthMapArray = OpenMaya.MScriptUtil() depthMapArray.createFromList( buffer ) depthMapArrayFloatPtr = depthMapArray.asFloatPtr() image.setDepthMap( depthMapArrayFloatPtr, width, height ) except: pass # creator def nodeCreator(): return OpenMayaMPx.asMPxPtr( customImagePlane() ) # initializer def nodeInitializer(): nAttr = OpenMaya.MFnNumericAttribute() # Setup the input attributes customImagePlane.aTransparency = nAttr.create("transparency", "tp", OpenMaya.MFnNumericData.kDouble, 0.0) nAttr.setStorable(True) nAttr.setInternal(True) nAttr.setMin(0.0) nAttr.setMax(1.0) nAttr.setKeyable(True) customImagePlane.addAttribute(customImagePlane.aTransparency) # initialize the script plug-in def initializePlugin(mobject): mplugin = OpenMayaMPx.MFnPlugin(mobject, "Autodesk", "1.0", "Any") try: mplugin.registerNode( kPluginNodeTypeName, kPluginNodeId, nodeCreator, nodeInitializer, OpenMayaMPx.MPxNode.kImagePlaneNode ) except: sys.stderr.write( "Failed to register node: %s" % kPluginNodeTypeName ) raise # uninitialize the script plug-in def uninitializePlugin(mobject): mplugin = OpenMayaMPx.MFnPlugin(mobject) try: mplugin.deregisterNode( kPluginNodeId ) except: sys.stderr.write( "Failed to register node: %s" % kPluginNodeTypeName ) raise
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