animation (version 0.2-0)

vi.lilac.chaser: Visual Illusions: Lilac Chaser

Description

Stare at the center cross for a few (say 30) seconds to experience the phenomena of the illusion.

Usage

vi.lilac.chaser(np = 16, col = "magenta", bg = "gray", cex.p = 7, 
    cex.c = 5, control = ani.control(interval = 0.05, nmax = 30), ...)

Arguments

np

number of points

col

color of points

bg

background color of the plot

cex.p

magnification of points

cex.c

magnification of the center cross

control

control parameters for the animation; see ani.control

...

other arguments passed to ani.control

Value

• None.

Details

Just try it out.

References

http://en.wikipedia.org/wiki/Lilac_chaser

See Also

points

Examples

op = par(pty = "s") 
vi.lilac.chaser(nmax = 20) 

# HTML animation page; nmax = 1 is enough! 
ani.start()
par(mar = rep(1, 4)) 
vi.lilac.chaser(np = 12, saveANI = TRUE, nmax = 1) 
ani.stop()
par(op)