Computes the spacetime coordinates of PLC and FLC given control settings relative to the origin (\mathbf{r}, t) = (\boldsymbol 0, 0).
Since these coordinates do not change for different
spacetime positions, they can be computed once before
getting the LC configurations for the entire field and
then used in each call by array maskexing in
get_LC_config
.
1 2  compute_LC_coordinates(horizon = 1, speed = 1, space.dim = 1, type = c("PLC", "FLC"),
shape = c("cone", "tube", "revcone"))

horizon 
integer; horizon for the PLC or FLC 
speed 
speed of propagation 
space.dim 
maximum value 
type 

shape 
shape of light cone: 
get_LC_config
setup_LC_geometry
summary.LC
plot.LC
1 2 3 4 5 6 7  plot(compute_LC_coordinates(speed = 1, horizon = 4), xlim = c(4, 2), pch = "",
cex = 2, col = 2, xlab = "Time", ylab = "Space")
points(compute_LC_coordinates(speed = 1, horizon = 2, type = "FLC"), pch = "+", cex = 2,
col = "blue")
plot(compute_LC_coordinates(speed = 1, horizon = 4, shape = "tube", type = "FLC"))
plot(compute_LC_coordinates(speed = 1, horizon = 4, shape = "revcone", type = "PLC"))

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