plane_point: Compute point on plane, given two other points on plane
In crcox/ShinyATLROI: Interactively Explore Possible ATL ROIs

Description Usage Arguments Value Examples

Takes the output of get_plane as the definition of a plane, and values for two coordinates. The missing third coordinate will be computed and returned. If a vector of points is provided for each coordinate the vectors must be the same length.

1	plane_point(plane, x, y, z)

`plane`	A list containing `normal` and `origin` of plane. And any two of the following three:
`x`	Coordinate along Right-Left axis
`y`	Coordinate along Anterior-Posterior axis
`z`	Coordinate along Inferior-Superior axis

The value for the coordinate not provided

## Not run: 
plane_point(plane, x=-10:10, z=1) # will return 21 values for y
plane_point(plane, x=-10:10, y=1:21) # will return 21 values for z

## End(Not run)