tourr (version 0.5.6)

geodesic_path: Generate geodesic path.

Description

Wrap basis generation method with a function that keeps computes the geodesic interpolation from the previous frame to the next frame, and provides convenient access to all the information about the path.

Usage

geodesic_path(current, target, frozen = NULL)

Arguments

new_target_f

function that generates new frame, with previous frame as argument

Value

interpolate

A function with single parameter in [0, 1] that returns an interpolated frame between the current and future frames. 0 gives the current plane, 1 gives the new target frame in plane of current frame.

dist

The distance, in radians, between the current and target frames.

Fa

The current frame.

Fz

The new target frame.

tau

The principle angles between the current and target frames.

Ga

The current plane.

Gz

The target plane.

Details

Frozen variables allow us to keep certain values of the projection fixed and generate a geodesic across the subspace generated by those

Examples

# NOT RUN {
a <- basis_random(4, 2)
b <- basis_random(4, 2)
path <- geodesic_path(a, b)

path$dist
all.equal(a, path$interpolate(0))
# Not true generally - a rotated into plane of b
all.equal(b, path$interpolate(1))
# }