如何获取选择点映射到视图空间中？源码分享

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如何获取选择点映射到视图空间中？源码分享
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1. //------------------------------------------------------------------------------
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2. // Select Screen Position and map to Modeling View Plane
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3. //------------------------------------------------------------------------------
   
4. bool GtacPmi::SelectPmiPosition(NXOpen::Point3d &pos)
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5. {
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6.     NXOpen::View* myView = NULL;
   
7.     NXOpen::Point3d myCursor(0, 0, 0);
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8. 
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9.     NXOpen::Selection::DialogResponse myResponse = m_ui->SelectionManager()->SelectScreenPosition("Select Screen Origin", &myView, &myCursor);
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10.     if (myResponse == NXOpen::Selection::DialogResponsePick)
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11.     {
    
12.         // obtain the current default annotation plane where PMIs are placed on
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13.         NXOpen::Xform *xform1;
    
14.         xform1 = m_wpart->Annotations()->GetDefaultAnnotationPlane(NXOpen::Annotations::PmiDefaultPlaneModelView);
    
15.         NXOpen::Matrix3x3 vmxDefaultPlane = xform1->Orientation();
    
16.         NXOpen::Point3d ptDefaultPlane = xform1->Origin();
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17.         NXOpen::Vector3d vecDefaultPlane(vmxDefaultPlane.Zx, vmxDefaultPlane.Zy, vmxDefaultPlane.Zz);
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18. 
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19.         // create the ray 'into the screen' at the selected cursor position
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20.         NXOpen::Matrix3x3 vmx = myView->Matrix();
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21.         NXOpen::Point3d p1(myCursor.X - vmx.Zx * 1000, myCursor.Y - vmx.Zy * 1000, myCursor.Z - vmx.Zz * 1000);
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22.         NXOpen::Point3d p2(myCursor.X + vmx.Zx * 1000, myCursor.Y + vmx.Zy * 1000, myCursor.Z + vmx.Zz * 1000);
    
23.         NXOpen::Line *lineRay = m_wpart->Curves()->CreateLine(p1, p2);
    
24.         lineRay->SetName("Ray");
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25. 
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26.         // create the plane from the view to intersect with the ray
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27.         NXOpen::Plane *planeView = m_wpart->Planes()->CreatePlane(ptDefaultPlane, vecDefaultPlane, NXOpen::SmartObject::UpdateOptionWithinModeling);
    
28.         planeView->SetVisibility(NXOpen::SmartObject::VisibilityOptionVisible);
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29.         planeView->SetName("ViewPlane");
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30. 
    
31.         // now create the intersection point
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32.         NXOpen::Point *pntInterSect = m_wpart->Points()->CreatePoint(planeView, lineRay, NULL, NULL, NXOpen::SmartObject::UpdateOptionWithinModeling);
    
33.         pntInterSect->SetVisibility(NXOpen::SmartObject::VisibilityOptionVisible);
    
34.         pntInterSect->SeTColor(10);
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35.         pntInterSect->SetName("Intersection");
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36. 
    
37.         pos = pntInterSect->Coordinates();
    
38.         print("\nPMI Position:", pos);
    
39. 
    
40.         // clean up - comment to see intermediate objects
    
41.         NXOpen::Session::UndoMarkId markDel = m_session->SetUndoMark(NXOpen::Session::MarkVisibilityVisible, "Delete");
    
42.         int nErrs1 = m_session->UpdateManager()->AddToDeleteList(pntInterSect);
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43.         int nErrs2 = m_session->UpdateManager()->AddToDeleteList(planeView);
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44.         int nErrs3 = m_session->UpdateManager()->AddToDeleteList(lineRay);
    
45.         int nErrs4 = m_session->UpdateManager()->DoUpdate(markDel);
    
46.         m_session->DeleteUndoMark(markDel, NULL);
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47. 
    
48.         return true;
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49.     }
    
50. 
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51.     return false;
    
52. }

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