animation (version 2.0-0)

vi.lilac.chaser: Visual Illusions: Lilac Chaser.

Description

Visual Illusions: Lilac Chaser. 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", 
    p.cex = 7, c.cex = 5)

Arguments

np

number of points

col

color of points

bg

background color of the plot

p.cex

magnification of points

c.cex

magnification of the center cross

Value

• None.

Details

Just try it out.

References

http://en.wikipedia.org/wiki/Lilac_chaser http://animation.yihui.name/animation:misc#lilac_chaser

See Also

points

Examples

oopt = ani.options(interval = 0.05, nmax = 20)
par(pty = "s")
vi.lilac.chaser()

## HTML animation page; nmax = 1 is enough!
saveHTML({
    ani.options(interval = 0.05, nmax = 1)
    par(pty = "s", mar = rep(1, 4))
    vi.lilac.chaser()
}, img.name = "vi.lilac.chaser", htmlfile = "vi.lilac.chaser.html", 
    ani.height = 480, ani.width = 480, title = "Visual Illusions: Lilac Chaser", 
    description = c("Stare at the center cross for a few (say 30) seconds", 
        "to experience the phenomena of the illusion."))

ani.options(oopt)