sl.vis.shift.rot: Check Visibility, Shift, and Rotate Points

In FESOM/spheRlab: Spherical Geometry, Analysis, and Plotting of Geoscientific Data on Arbitrary Grids

Check Visibility, Shift, and Rotate Points

Description

Check the visibility, shift, and rotate points for a spheRlab plot.

Usage

sl.vis.shift.rot(plot.init.res, lon, lat)

Arguments

plot.init.res	a spheRlab plot specifics list as returned by sl.plot.init (or a variant thereof).
lon	a vector of length N specifying the longitudes of the points.
lat	a vector of length N specifying the latitudes of the points.

Details

This function is intended mainly for internal usage.

Value

A list with the following elements:

x	a vector of length N specifying the plot-projection x-coordinates of the points.
y	a vector of length N specifying the plot-projection y-coordinates of the points.
rot.lon	a vector of length N specifying the post-rotation longitudes of the points.
rot.lat	a vector of length N specifying the post-rotation latitudes of the points.
visible	a vector of length N with logical values indicating the visibility of the points.

Note

This function is used by sl.plot.lines, sl.plot.polygon, and sl.plot.text.

Author(s)

Helge Goessling

FESOM/spheRlab documentation built on April 6, 2024, 6:52 p.m.