narrowPolyViewer.py

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

glRenderer = OpenMayaRender.MHardwareRenderer.theRenderer()
glFT = glRenderer.glFunctionTable()

kPluginCmdName = "spNarrowPolyViewer"

kInitFlag = "-in"
kInitFlagLong = "-init"

kResultsFlag = "-r"
kResultsFlagLong = "-results"

kClearFlag = "-cl"
kClearFlagLong = "-clear"

kToleranceFlag = "-tol"
kToleranceFlagLong = "-tolerance"

class narrowPolyViewer(OpenMayaMPx.MPx3dModelView):
        def __init__(self):
                OpenMayaMPx.MPx3dModelView.__init__(self)

                self.fOldCamera = OpenMaya.MDagPath()
                self.fCameraList = OpenMaya.MDagPathArray()
                self.fCurrentPass = 0
                self.fDrawManips = True
                self.fOldDisplayStyle = OpenMayaUI.M3dView.kWireFrame
                self.fLightTest = False
                self.fListList = OpenMaya.MDagPathArray()
                self.tol = 10.0

                self.setMultipleDrawEnable(True)

        def multipleDrawPassCount(self):
                return self.fCameraList.length() + 1

        def setCameraList(self, cameraList):
                setMultipleDrawEnable(True)
                self.fCameraList.clear()
                
                for i in range(cameraList.length()):
                        self.fCameraList.append(cameraList[i])

                self.refresh()

        def removeAllCameras(self):
                self.fCameraList.clear()
                self.refresh()

        def getCameraHUDName(self):
                cameraPath = OpenMaya.MDagPath()
                self.getCamera(cameraPath)              

                cameraPath.pop()
                
                hudName = "spNarrowPolyViewer: " + cameraPath.partialPathName()
                return hudName

        def setIsolateSelect(self, list):
                self.setViewSelected(True)
                return self.setObjectsToView(list)

        def setIsolateSelectOff(self):
                return self.setViewSelected(False)

        def preMultipleDraw(self):
                self.fCurrentPass = 0
                self.fDrawManips = False

                dagPath = OpenMaya.MDagPath()

                try:
                        oldCamera = OpenMaya.MDagPath()
                        self.getCamera(oldCamera)

                        self.fOldCamera = oldCamera

                        displayHUD(False)

                        sList = OpenMaya.MSelectionList()
                        OpenMaya.MGlobal.getActiveSelectionList(sList)
                        
                        sList.getDagPath(0, dagPath)
                except:
                        # sys.stderr.write("ERROR: spNarrowPolyViewer.preMultipleDraw b\n")
                        pass

                try:
                        itMeshPolygon = OpenMaya.MItMeshPolygon(dagPath, OpenMaya.cvar.MObject_kNullObj)
                        
                        if None == itMeshPolygon:
                                return;
                        
                        self.beginGL()

                        while not itMeshPolygon.isDone():
                                points = OpenMaya.MPointArray()
                                itMeshPolygon.getPoints(points, OpenMaya.MSpace.kWorld)
                                length = points.length()
                                
                                if length == 3:
                                        for i in range(length):
                                                p = points[i]
                                                p1 = points[(i+1)%length]
                                                p2 = points[(i+2)%length]
                                                
                                                v1 = OpenMaya.MVector(p1 - p)
                                                v2 = OpenMaya.MVector(p2 - p)
                                                
                                                angle = v1.angle(v2) * 180.0 / math.pi
                                                
                                                if math.fabs(angle - self.tol) < 0.0001 or angle < self.tol:
                                                        glFT.glBegin( OpenMayaRender.MGL_POLYGON )
                                                        glFT.glVertex3f(points[0].x, points[0].y, points[0].z)
                                                        glFT.glVertex3f(points[1].x, points[1].y, points[1].z)
                                                        glFT.glVertex3f(points[2].x, points[2].y, points[2].z)
                                                        
                                                        glFT.glNormal3f(points[0].x, points[0].y, points[0].z)
                                                        glFT.glNormal3f(points[1].x, points[1].y, points[1].z)
                                                        glFT.glNormal3f(points[2].x, points[2].y, points[2].z)
                                                        
                                                        glFT.glTexCoord3f(points[0].x, points[0].y, points[0].z)
                                                        glFT.glTexCoord3f(points[1].x, points[1].y, points[1].z)
                                                        glFT.glTexCoord3f(points[2].x, points[2].y, points[2].z)
                                                        glFT.glEnd()

                                itMeshPolygon.next()

                        self.endGL()
                except:
                        # sys.stderr.write("ERROR: spNarrowPolyViewer.preMultipleDraw c\n")
                        pass

        def postMultipleDraw(self):
                try:
                        self.setCamera(self.fOldCamera)
                        self.fDrawManips = True
                        self.updateViewingParameters()
                except:
                        sys.stderr.write("ERROR: spNarrowPolyViewer.postMultipleDraw\n")
                        raise

        def preMultipleDrawPass(self, index):
                self.fCurrentPass = index

                try:
                        self.setDisplayAxis(False)
                        self.setDisplayAxisAtOrigin(False)
                        self.setDisplayCameraAnnotation(False)

                        dagPath = OpenMaya.MDagPath()
                
                        if self.fCurrentPass == 0:
                                self.getCamera(dagPath)
                        else:
                                nCameras = self.fCameraList.length()
                                if self.fCurrentPass <= nCameras:
                                        dagPath = self.fCameraList[self.fCurrentPass-1]
                                else:
                                        sys.stderr.write("ERROR: ...too many passes specified\n")
                                        return
                
                        self.setCameraInDraw(dagPath)

                        self.setObjectDisplay(OpenMayaUI.M3dView.kDisplayEverything, True)
                        
                        if dagPath == self.fOldCamera:
                                self.fDrawManips = True
                                self.setObjectDisplay(OpenMayaUI.M3dView.kDisplayGrid, True)

                                self.setFogEnabled(True)
                                
                                self.setBackgroundFogEnabled(False)
                                
                                self.setObjectDisplay(OpenMayaUI.M3dView.kDisplayLights, True)
                                self.setObjectDisplay(OpenMayaUI.M3dView.kDisplayCameras, True)
                                self.setObjectDisplay(OpenMayaUI.M3dView.kDisplayIkHandles, True)
                                self.setObjectDisplay(OpenMayaUI.M3dView.kDisplayDimensions, True)
                                self.setObjectDisplay(OpenMayaUI.M3dView.kDisplaySelectHandles, True)
                                
                                textPos = OpenMaya.MPoint(0.0, 0.0, 0.0)
                                str = "Main View"
                                self.drawText(str, textPos, OpenMayaUI.M3dView.kLeft)
                        else:
                                self.fDrawManips = False
                                self.setObjectDisplay(OpenMayaUI.M3dView.kDisplayGrid, False)

                                self.setFogEnabled(True)
                                
                                self.setObjectDisplay(OpenMayaUI.M3dView.kDisplayLights, False)
                                self.setObjectDisplay(OpenMayaUI.M3dView.kDisplayCameras, False)
                                self.setObjectDisplay(OpenMayaUI.M3dView.kDisplayIkHandles, False)
                                self.setObjectDisplay(OpenMayaUI.M3dView.kDisplayDimensions, False)
                                self.setObjectDisplay(OpenMayaUI.M3dView.kDisplaySelectHandles, False)
                except:
                        sys.stderr.write("ERROR: spNarrowPolyViewer.preMultipleDrawPass\n")
                        raise
                
                # note do not have light test in here
                
                # self.setLightingMode(OpenMayaUI.kLightDefault)
                
                if ((self.fCurrentPass % 2) == 0):
                        self.setObjectDisplay(OpenMayaUI.M3dView.kDisplayNurbsSurfaces, True );
                        self.setObjectDisplay(OpenMayaUI.M3dView.kDisplayNurbsCurves, True );
                        
                self.updateViewingParameters()

        def postMultipleDrawPass(self, index):
                self.setObjectDisplay(OpenMayaUI.M3dView.kDisplayEverything, True)

        def okForMultipleDraw(self, dagPath):
                if not self.fDrawManips and dagPath.hasFn(OpenMaya.MFn.kManipulator3D):
                        return False
                return True

        def multipleDrawPassCount(self):
                return self.fCameraList.length() + 1
                
        def viewType(self):
                return "spNarrowPolyViewer";




class narrowPolyViewerCmd(OpenMayaMPx.MPxModelEditorCommand):
        def __init__(self):
                OpenMayaMPx.MPxModelEditorCommand.__init__(self)
                self.fCameraList = OpenMaya.MDagPathArray()

        def appendSyntax(self):
                try:
                        theSyntax = self._syntax()
                        theSyntax.addFlag(kInitFlag, kInitFlagLong)
                        theSyntax.addFlag(kResultsFlag, kResultsFlagLong)
                        theSyntax.addFlag(kClearFlag, kClearFlagLong)
                        theSyntax.addFlag(kToleranceFlag, kToleranceFlagLong, OpenMaya.MSyntax.kDouble)

                except:
                        sys.stderr.write( "ERROR: creating syntax for model editor command: %s" % kPluginCmdName )

        def doEditFlags(self):
                try:
                        user3dModelView = self.modelView()

                        if user3dModelView.viewType() == kPluginCmdName:
                                argData = self._parser()
        
                                if argData.isFlagSet(kInitFlag):
                                        self.initTests(user3dModelView)
                                elif argData.isFlagSet(kResultsFlag):
                                        self.testResults(user3dModelView)
                                elif argData.isFlagSet(kClearFlag):
                                        self.clearResults(user3dModelView)
                                elif argData.isFlagSet(kToleranceFlag):
                                        tol = argData.flagArgumentDouble(kToleranceFlag, 0)
                                        user3dModelView.tol = tol
                                        user3dModelView.refresh(True, True)
                                else:
                                        return OpenMaya.kUnknownParameter
                except:
                        sys.stderr.write( "ERROR: in doEditFlags for model editor command: %s" % kPluginCmdName )

        def initTests(self, view):
                clearResults(self, view)
                
                # Add every camera into the scene.  Don't change the main camera,
                # it is OK that it gets reused.
                #
                cameraPath = OpenMaya.MDagPath()
                dagIterator = OpenMaya.MItDag(OpenMaya.MItDag.kDepthFirst, OpenMaya.MFn.kCamera)

                while not dagIterator.isDone():
                        try:
                                dagIterator.getPath(cameraPath)
                                camera = OpenMaya.MFnCamera(cameraPath)
                        except:
                                continue

                        OpenMaya.MGlobal.displayInfo(camera.fullPathName())
                        self.fCameraList.append(cameraPath)

                        dagIterator.next()

                try:
                        view.setCameraList(self.fCameraList)
                except:
                        OpenMaya.MGlobal.displayError("Could not set list of cameras\n")
                        raise

                view.refresh()

        def testResults(self, view):
                print "fCameraLIst.length() = %d " % (self.fCameraList.length(), )
                length = self.fCameraList.length()

        def clearResults(self, view):
                view.removeAllCameras()
                self.fCameraList.clear()



def cmdCreator():
        return OpenMayaMPx.asMPxPtr( narrowPolyViewerCmd() )

def viewerCreator():
        return OpenMayaMPx.asMPxPtr( narrowPolyViewer() )

# initialize the script plug-in
def initializePlugin(mobject):
        mplugin = OpenMayaMPx.MFnPlugin(mobject)
        try:
                mplugin.registerModelEditorCommand( kPluginCmdName, cmdCreator, viewerCreator)
        except:
                sys.stderr.write( "Failed to register model editor command: %s" % kPluginCmdName )
                raise

# uninitialize the script plug-in
def uninitializePlugin(mobject):
        mplugin = OpenMayaMPx.MFnPlugin(mobject)
        try:
                mplugin.deregisterModelEditorCommand( kPluginCmdName )
        except:
                sys.stderr.write( "Failed to deregister model editor command: %s" % kPluginCmdName )
                raise