- double Xover = (x - mSlicers[slicer]->GetOverlay()->GetOrigin()[0])
- /mSlicers[slicer]->GetOverlay()->GetSpacing()[0];
- double Yover = (y - mSlicers[slicer]->GetOverlay()->GetOrigin()[1])
- /mSlicers[slicer]->GetOverlay()->GetSpacing()[1];
- double Zover = (z - mSlicers[slicer]->GetOverlay()->GetOrigin()[2])
- /mSlicers[slicer]->GetOverlay()->GetSpacing()[2];
- if (Xover >= mSlicers[slicer]->GetOverlayMapper()->GetInput()->GetWholeExtent()[0] &&
- Xover <= mSlicers[slicer]->GetOverlayMapper()->GetInput()->GetWholeExtent()[1] &&
- Yover >= mSlicers[slicer]->GetOverlayMapper()->GetInput()->GetWholeExtent()[2] &&
- Yover <= mSlicers[slicer]->GetOverlayMapper()->GetInput()->GetWholeExtent()[3] &&
- Zover >= mSlicers[slicer]->GetOverlayMapper()->GetInput()->GetWholeExtent()[4] &&
- Zover <= mSlicers[slicer]->GetOverlayMapper()->GetInput()->GetWholeExtent()[5]) {
- valueOver = static_cast<vtkImageData*>(mSlicers[slicer]->GetOverlayMapper()->GetInput())->
- GetScalarComponentAsDouble(
- (int)floor(Xover),
- (int)floor(Yover),
- (int)floor(Zover),0);
- }
+ vtkImageData *overlay = dynamic_cast<vtkImageData*>(mSlicers[slicer]->GetOverlayMapper()->GetInput());
+ double Xover = (x - overlay->GetOrigin()[0]) / overlay->GetSpacing()[0];
+ double Yover = (y - overlay->GetOrigin()[1]) / overlay->GetSpacing()[1];
+ double Zover = (z - overlay->GetOrigin()[2]) / overlay->GetSpacing()[2];
+ valueOver = this->GetScalarComponentAsDouble(overlay, Xover, Yover, Zover);