Stereographic projection of cones — stereo

Visualization of smallcircles and greatcircles in a stereographic projection.

Usage

stereo_smallcircle(
  x,
  d = 90,
  col = 1,
  N = 1000,
  upper.hem = FALSE,
  earea = TRUE,
  lty = 1,
  lwd = 1,
  BALL.radius = 1,
  ...
)

stereo_greatcircle(x, ...)

Arguments

x: Object of class "line" or "plane"
d: numeric. conical angle in degrees.
col, lty, lwd: color, line type, and line width parameters
N: integer. number of points to calculate
upper.hem: logical. Whether the projection is shown for upper hemisphere (TRUE) or lower hemisphere (FALSE, the default).
earea: logical TRUE for Lambert equal-area projection (also "Schmidt net"; the default), or FALSE for meridional stereographic projection (also "Wulff net" or "Stereonet").
BALL.radius: numeric size of sphere
...: optional graphical parameters

Examples

stereoplot()
stereo_point(Line(90, 5), lab = "L")
stereo_smallcircle(Line(90, 5), d = 10)
stereo_point(Plane(120, 30), lab = "P", col = "red")
stereo_greatcircle(Plane(120, 30), col = "red")


stereoplot()
stereo_point(Line(c(129, 90), c(30, 5)), lab = c("L1", "L2"))
stereo_smallcircle(Line(c(129, 90), c(30, 5)), d = c(10, 5), col = 1:2, lty = 1:2, lwd = 1:2)