fsbrain (version 0.1.0)

rotate3D: Rotate a 3D array in 90 degree steps.

Description

Rotate a 3D array in 90 degree steps along an axis. This leads to an array with different dimensions.

Usage

rotate3D(volume, axis = 1L, degrees = 90L)

Arguments

volume

a 3D image volume

axis

positive integer in range 1L..3L or an axis name, the axis to use.

degrees

integer, must be a (positive or negative) multiple of 90L.

Value

a 3D image volume, rotated around the axis. The dimensions may or may not be different from the input image, depending on the rotation angle.

See Also

Other volume math: flip3D()

Examples

# NOT RUN {
   # Load data
   fsbrain::download_optional_data();
   subjects_dir = fsbrain::get_optional_data_filepath("subjects_dir");
   brain = subject.volume(subjects_dir, 'subject1', 'brain') / 255;
   # Show a lightbox along the third axis. Note that the orientation in the
   #  visualization is not very intuitive: the brain lies on the side.
   volvis.lightbox(brain, axis=3);
   # Rotate the whole brain volume by 90 degrees clockwise along
   #  the third axis to fix the orientation:
   volvis.lightbox(rotate3D(brain, axis=3, degrees = 90), axis=3);
# }
# NOT RUN {
# }