mm->vox integers per FSL fslview cursor widget

gistfile1.txt

FSL fslview cursor widget
------------------------------------------------
Appears to use explicit casting to convert float mmm coordinates to integer
voxel coordinates, truncating in the process:

line 266 from fslview's cursorwidget.cpp:

	232 void CursorWidget::mmBoxChanged()
	233 {
	...
	261       float xMm = m_xMmBox->text().toFloat();
	262       float yMm = m_yMmBox->text().toFloat();
	263       float zMm = m_zMmBox->text().toFloat();
	264 
	265       short xCur(0), yCur(0), zCur(0);
	266       image->getInfo()->mmToVoxCoord(xMm ,yMm, zMm , xCur, yCur, zCur);
	267 
	268       m_xVoxBox->setValue(xCur);
	269       m_yVoxBox->setValue(yCur);
	270       m_zVoxBox->setValue(zCur);
	...

...which converts floats to integers via  calls to short() in imageinfo.cpp:

	231 void ImageInfo::mmToVoxCoord(float xmm, float ymm, float zmm, short& x, short& y, short& z) const
	232 {
	233   float xf, yf, zf;
	234   if(m_sformcode != NIFTI_XFORM_UNKNOWN)
	235     FslGetVoxCoord(inqStdMat(), xmm, ymm, zmm, &xf, &yf, &zf);
	236   else
	237     FslGetVoxCoord(inqRigidMat(), xmm, ymm, zmm, &xf, &yf, &zf);
	238   x = short(xf);
	239   y = short(yf);
	240   z = short(zf);
	241 }