I find out the problem in Method1. I should use
v= omui.M3dView().active3dView()
rather than
v= omui.M3dView()
I confirmed that it is a viewport position, not the screen position.
On Thursday, June 14, 2018 at 10:45:13 AM UTC+8, yaoys wrote:
>
> Hi, all
>
> Motivation:
> I'm trying to do the automation test for my maya plugin by manipulating
> mouse to select a vertex.
>
> System information:
> Maya2016
>
> Methods which failed:
> 1.
> import maya.api.OpenMaya as om2
> import maya.api.OpenMayaUI as omui2
> point2 = cmds.pointPosition('pPlane1.vtx[0]', world=True)
> v2 = omui2.M3dView()
> worldPt2 = om2.Mpoint(point2[0], point2[1], point2[2])
> #print worldPt2
> print v2.worldToView(worldPt2) # It complains an error here: Error:
> RuntimeError: file <maya console> line 7: (kFailure): Object does not exist
> #
>
> 2.
> import maya.OpenMaya as om
> import maya.OpenMayaUI as omui
> point2 = cmds.pointPosition('pPlane1.vtx[0]', world=True)
> #print point
> v= omui.M3dView()
> worldPt = om.Mpoint(point[0], point[1], point[2])
> #print worldPt
>
> xutil = om.MScriptUtil()
> yutil = om.MScriptUtil()
> xutil.createFromInt(0)
> yutil.createFromInt(0)
> xptr = xutil.asShortPtr()
> yptr = yutil.asShortPtr()
> print v.worldToView(worldPt, xptr, yptr) # It complains an error here:
> Error: RuntimeError: file
> S:\Maya_2016_DI\build\Release\runTime\Python\Lib\site-packages\maya\OpenMayaUI.py
>
> line 244:: (kFailure): Object does not exist #
> x = xutil.getShort(xptr)
> y = yutil.getShort(yptr)
>
> BTW,
> S:\Maya_2016_DI\build\Release\runTime\Python\Lib\site-packages\maya\OpenMayaUI.py
>
> does not exist on my machine.
>
>
> 3.
> I tried to compute viewport position manually by using this code:
> https://forum.highend3d.com/t/3d-point-to-2d-screen-position/48599/2
> import maya.OpenMaya as om def pointWorldToCam(cameraName, point, res):
> sel = om.MSelectionList() dag = om.MDagPath() sel.add(cameraName)
> sel.getDagPath(0,dag) cam = om.MFnCamera(dag) floatMat =
> cam.projectionMatrix() projMat = om.MMatrix(floatMat.matrix) floatMat =
> cam.postProjectionMatrix() postProjMat = om.MMatrix(floatMat.matrix)
> transMat = dag.inclusiveMatrix() #long form ensures compatibility with
> MPoint and any iterable point = om.MPoint(point[0],point[1],point[2])
> fullMat = transMat.inverse() * projMat * postProjMat nuPoint = point *
> fullMat return [(nuPoint[0]/nuPoint[3]/2+0.5)*res[0], (1-(nuPoint[1
> ]/nuPoint[3]/2+0.5))*res[1]]
>
> #test
> point2 = cmds.pointPosition('pPlane1.vtx[0]', world=True)
> height = cmds.control('modePanel4', q=True, height=True)
> width= cmds.control('modePanel4', q=True, width=True)
> *viewport_position = *pointWorldToCam('persp', (point2[0], point2[1],
> point2[2]), (width, height))
>
>
> And I capture the real mouse position (screen_position) by using this code
> #include <iostream> #include<windows.h> int main()
> { while(1){ POINT p; GetCursorPos(&p); std::cout << "screen_position: x:"
> << p.x << ", y:" << p.y << ". " << std::endl; } return 0; }
>
> It shows that *viewport_position does not equal with *screen_position
>
>
> My questions:
> 1. What's wrong in Method1 and Method2?
> 2. Even Method1 and Method2 could output the result, I'm afraid that
> their results are viewport positions which cannot be used to manipulate the
> mouse to click the specified vertex.
> So, how to get the screen position from viewport position? is it possible
> in Maya?
>
> Cheers
> Yao
>
>
>
>
>
>
--
You received this message because you are subscribed to the Google Groups
"Python Programming for Autodesk Maya" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/python_inside_maya/aab2e131-f384-4d34-85c8-dbe5a0a371f1%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
