rglToLattice {rgl} | R Documentation |
These functions take a user orientation matrix from an rgl scene and approximate the parameters to either lattice or base graphics functions.
rglToLattice(rotm = par3d("userMatrix")) rglToBase(rotm = par3d("userMatrix"))
rotm |
A matrix in homogeneous coordinates to convert. |
The lattice package can use Euler angles in
the ZYX scheme to describe the rotation of a scene
in its wireframe
or
cloud
functions. The
rglToLattice
function computes these angles
based on rotm
, which defaults to the current
user matrix. This allows rgl to be used
to interactively find a decent viewpoint and
then reproduce it in lattice.
The base graphics persp
function does
not use full Euler angles; it
uses a viewpoint angle, and assume the z axis
remains vertical. The rglToBase
function
computes the viewpoint angle accurately if the
rgl scene is displayed with a vertical
z axis, and does an approximation otherwise.
rglToLattice
returns a list suitable to
be used as the screen
argument to
wireframe
.
rglToBase
returns a list containing
theta
and phi
components which
can be used as corresponding arguments in persp
.
Duncan Murdoch
if (requireNamespace("orientlib")) { persp3d(volcano, col = "green") if (requireNamespace("lattice")) lattice::wireframe(volcano, screen = rglToLattice()) angles <- rglToBase() persp(volcano, col = "green", border = NA, shade = 0.5, theta = angles$theta, phi = angles$phi) }