[Maya-Python] Re: closestIntersection cannot consistently hit the target meshOBJ

[H]

Sometimes it hits, and sometimes it doesn't even hit when the mouse clicks 
on the mesh, please help me to check what went wrong, thank you first.

在2022年11月19日星期六 UTC+8 22:23:29<H> 写道：

> from PySide2 import QtGui, QtCore, QtWidgets
> import maya.cmds as cmds
> import maya.api.OpenMaya as om2
> import maya.api.OpenMayaUI as mui      
>
> class MyEventHandler(QtCore.QObject):
>     def eventFilter(self, target, event):
>         if event.type() == event.MouseButtonPress and str(event.button()) 
> =="PySide2.QtCore.Qt.MouseButton.LeftButton" :
>
>             pos = QtGui.QCursor.pos()
>             widget = QtWidgets.QApplication.widgetAt(pos)
>             relPos = widget.mapFromGlobal(pos)
>
>             QTx = int(relPos.x())
>             QTy = int(relPos.y())
>
>             ray_sourceInt = om2.MPoint()     
>             ray_directionInt = om2.MVector()  
>
>             active_view = mui.M3dView.active3dView()
>            # 3dview origin of maya  is on the lower left
>             mayaY = active_view.portHeight()-QTy
>
>             active_view.viewToWorld(QTx,mayaY , ray_sourceInt, 
> ray_directionInt)
>
>             ray_sourceFloat = om2.MFloatPoint(ray_sourceInt) #MPoint to 
> MFloatPoint
>             ray_directionFloat = om2.MFloatVector(ray_directionInt)
>
>             #get meshFn
>             selList = om2.MSelectionList()
>             selList = om2.MGlobal.getActiveSelectionList(0)
>             meshOBJ = selList.getDagPath(0).extendToShape()
>             meshFn = om2.MFnMesh(meshOBJ)
>
>             params = om2.MMeshIsectAccelParams ()    
>
>             faceList = [0,1,2,3,4,5,6,7]
>             triList = [0,1]
>             
>             result= 
> meshFn.closestIntersection(ray_sourceFloat,ray_directionFloat,4,9999,False,faceList,triList,False,params,0.1)
>             print(result)
>
>         return super(MyEventHandler, self).eventFilter(target, event)
>
> handler = MyEventHandler()
>
> app = QtWidgets.QApplication.instance()
> app.installEventFilter(handler)
> #app.removeEventFilter(handler)
>

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