[BUG] vtkExtractVOI sometime work normally

[wuzhuobin]

As the old days, this is a trick bug.
the extracto voi will lead the canvas source behaves strangely.
When extract around extent[2i] - extent[2i +1], the painting of canvas source won't be render.
However, if extract voi happens without changing cursor's bounding, this will work well.
Now the temporary fixation is that "Dont update the cursor boundary."

[wuzhuobin]

void MyImageViewer::InitializeCursorBoundary()
{
// uncomment the following code will lead the cursor boundary updated normally
// but it will lead to the canvas source behaviour very strange.

//this->GetInputAlgorithm()->Update();
const double* spacing = GetInput()->GetSpacing();
const double* origin = GetInput()->GetOrigin();
const int* extent = GetInput()->GetExtent();
double bound[6];
bound[0] = origin[0] + extent[0] * spacing[0];
bound[1] = origin[0] + extent[1] * spacing[0];
bound[2] = origin[1] + extent[2] * spacing[1];
bound[3] = origin[1] + extent[3] * spacing[1];
bound[4] = origin[2] + extent[4] * spacing[2];
bound[5] = origin[2] + extent[5] * spacing[2];

Cursor3D->SetModelBounds(bound);
Cursor3D->Update();

}

[wuzhuobin]

somehow, cursor3d will affect the behaviour of canvas source's behaviour
now it is a temporary fixation for canvas source.
now it is suggested to use the internal method of MyImageViewer to extractVOI

[alabamagan]

Nice so it is solved?

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On Wed, Nov 2, 2016 at 11:22 AM +0800, "wuzhuobin" [email protected] wrote:

somehow, cursor3d will affect the behaviour of canvas source's behaviour

now it is a temporary fixation for canvas source.

now it is suggested to use the internal method of MyImageViewer to extractVOI

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[wuzhuobin]

just force not updating cursor bound