[vtkusers] vtkBooleanOperationPolyDataFilter, issue & question

[Bill Lorensen]

Rémi,

I have submitted a patch for gerrit review:
http://review.source.kitware.com/#/t/251/

Thanks for your report.

Bill

On Wed, Mar 14, 2012 at 2:51 PM, Bill Lorensen <bill.lorensen at gmail.com> wrote:
> Thanks for the report. I will change UNION to VTK_UNION, etc. In
> general we try to keep enums unique by adding the VTK_ prefix.
>
> Bill
>
> On Wed, Mar 14, 2012 at 5:49 AM, Rémi Blanc <rblanc33 at gmail.com> wrote:
>> Hi all,
>>
>> I have a small issue, and one question about
>> vtkBooleanOperationPolyDataFilter.
>>
>> Issue:
>>
>> I experienced compilation errors when including
>> vtkBooleanOperationPolyDataFilter.h within a project, under Windows and
>> using Visual Studio 2008 (Express)
>> It seems to be related to the enumeration definition (line 53)
>>  enum OperationType
>>  {
>>    UNION=0,
>>    INTERSECTION,
>>    DIFFERENCE
>>  };
>> Actually, the problem apparently comes from the fact that the name
>> DIFFERENCE is already used somewhere in windows standard includes (winuser.h
>>  there is a    #define DIFFERENCE 11)
>> I tried to #undef it before including vtkBooleanOperationPolyDataFilter.h
>> but it doesn't seem to change anything.
>> The only workaround I found yet is to replace DIFFERENCE by e.g.
>> SETDIFFERENCE in the filter.
>>
>> Would someone have a better solution? (besides changing the OS and
>> compiler...)
>>
>>
>>
>> Question:
>>
>> After doing so, I could successfully test the filter with various meshes.
>> It works perfectly well for meshes created from the various vtk___Sources
>> (which is already a great help for my project!)
>> However, I obtain spurious results when working on 'manually' generated
>> meshes, such as simple cubes defined with 8 points and 12 triangles (see
>> code below)
>> What are the requirements for the input meshes?
>> and how should I define my custom meshes so they are compatible with the
>> filter?
>>
>>
>> Thanks,
>>
>> Rémi Blanc
>>
>>
>>
>>    double W1 = 5, H1 = 4, D1 = 2;
>>    double W2 = 2, H2 = 5, D2 = 4;
>>    points1->InsertNextPoint(-W1,-H1,-D1); points1->InsertNextPoint(-W1,
>> H1,-D1); points1->InsertNextPoint( W1, H1,-D1); points1->InsertNextPoint(
>> W1,-H1,-D1);
>>    points1->InsertNextPoint(-W1,-H1, D1); points1->InsertNextPoint(-W1, H1,
>> D1); points1->InsertNextPoint( W1, H1, D1); points1->InsertNextPoint(
>> W1,-H1, D1);
>>    points2->InsertNextPoint(-W2,-H2,-D2); points2->InsertNextPoint(-W2,
>> H2,-D2); points2->InsertNextPoint( W2, H2,-D2); points2->InsertNextPoint(
>> W2,-H2,-D2);
>>    points2->InsertNextPoint(-W2,-H2, D2); points2->InsertNextPoint(-W2, H2,
>> D2); points2->InsertNextPoint( W2, H2, D2); points2->InsertNextPoint(
>> W2,-H2, D2);
>>
>>    vtkIdType tri[3];
>>    //'lower' faces
>>    tri[0] = 0; tri[1] = 1; tri[2] = 2;
>>  cells1->InsertNextCell(3, tri);
>>    tri[0] = 0; tri[1] = 2; tri[2] = 3;
>>  cells1->InsertNextCell(3, tri);
>>    //side faces
>>    tri[0] = 0; tri[1] = 1; tri[2] = 5;
>>  cells1->InsertNextCell(3, tri);
>>    tri[0] = 0; tri[1] = 5; tri[2] = 4;
>>  cells1->InsertNextCell(3, tri);
>>    tri[0] = 1; tri[1] = 2; tri[2] = 6;
>>  cells1->InsertNextCell(3, tri);
>>    tri[0] = 1; tri[1] = 6; tri[2] = 5;
>>  cells1->InsertNextCell(3, tri);
>>    tri[0] = 2; tri[1] = 3; tri[2] = 7;
>>  cells1->InsertNextCell(3, tri);
>>    tri[0] = 2; tri[1] = 7; tri[2] = 6;
>>  cells1->InsertNextCell(3, tri);
>>    tri[0] = 0; tri[1] = 7; tri[2] = 3;
>>  cells1->InsertNextCell(3, tri);
>>    tri[0] = 0; tri[1] = 4; tri[2] = 7;
>>  cells1->InsertNextCell(3, tri);
>>    //'upper' face
>>    tri[0] = 4; tri[1] = 5; tri[2] = 6;
>>  cells1->InsertNextCell(3, tri);
>>    tri[0] = 4; tri[1] = 7; tri[2] = 6;
>>  cells1->InsertNextCell(3, tri);
>>
>>    obj1->SetPoints(points1); obj2->SetPoints(points2);
>>    cells1->Squeeze();
>>    obj1->SetPolys(cells1);   obj2->SetPolys(cells1);
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>
>
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