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#
# these transformations permute medical image data to maintain proper orientation
# regardless of the acqusition order. After applying these transforms with
# vtkTransformFilter, a view up of 0,-1,0 will result in the body part
# facing the viewer.
# NOTE: some transformations have a -1 scale factor for one of the components.
# To ensure proper polygon orientation and normal direction, you must
# apply the vtkPolyDataNormals filter.
#
# Naming:
# si - superior to inferior (top to bottom)
# is - inferior to superior (bottom to top)
# ap - anterior to posterior (front to back)
# pa - posterior to anterior (back to front)
# lr - left to right
# rl - right to left
#
vtkTransform si
si SetMatrix 1 0 0 0 0 0 1 0 0 -1 0 0 0 0 0 1
vtkTransform is
is SetMatrix 1 0 0 0 0 0 -1 0 0 -1 0 0 0 0 0 1
vtkTransform ap
ap Scale 1 -1 1
vtkTransform pa
pa Scale 1 -1 -1
vtkTransform lr
lr SetMatrix 0 0 -1 0 0 -1 0 0 1 0 0 0 0 0 0 1
vtkTransform rl
rl SetMatrix 0 0 1 0 0 -1 0 0 1 0 0 0 0 0 0 1
#
# the previous transforms assume radiological views of the slices (viewed from the feet). other
# modalities such as physical sectioning may view from the head. these transforms modify the original
# with a 180 rotation about y
#
vtkTransform hf
hf SetMatrix -1 0 0 0 0 1 0 0 0 0 -1 0 0 0 0 1
vtkTransform hfsi
hfsi Concatenate [hf GetMatrix]
hfsi Concatenate [si GetMatrix]
vtkTransform hfis
hfis Concatenate [hf GetMatrix]
hfis Concatenate [is GetMatrix]
vtkTransform hfap
hfap Concatenate [hf GetMatrix]
hfap Concatenate [ap GetMatrix]
vtkTransform hfpa
hfpa Concatenate [hf GetMatrix]
hfpa Concatenate [pa GetMatrix]
vtkTransform hflr
hflr Concatenate [hf GetMatrix]
hflr Concatenate [lr GetMatrix]
vtkTransform hfrl
hfrl Concatenate [hf GetMatrix]
hfrl Concatenate [rl GetMatrix]
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