TaoTeProgramming (version 1.0)

mountscene: Draw mountains, hills and beaches

Description

Draws a variety of scenes depending on some subtle changes.

Usage

mountscene(levels = 5, vlen = 200, tilt = 0.2, df = 7,  color = NULL, box = TRUE, seed = NULL)
hillscene(num = 100, vlen = 200, tilt = 0.2, df = 7,  color = NULL, seed = NULL)
mountain(values, color, df = 7)

Arguments

levels

number of levels of objects in the scene.

vlen

the number of random points along a level.

tilt

the slope of the level. This is in fractions of the vertical dimension -- the left side is at tilt below the average level and the right side is tilt above.

df

degrees of freedom of the smoothing of the random points.

color

colors to fill in below each level.

box

logical value: if TRUE, a frame is drawn around the picture.

seed

an integer giving the argument for set.seed.

num

the number of hills.

values

numeric vector that is smoothed.

Value

nothing useful.

Side effects

create a plot on the current graphics device, and modify the random seed.

References

http://www.burns-stat.com/documents/books/tao-te-programming/

See Also

canvas, set.seed.

Examples

# hills
hillscene(color=grep("green|yellow", colors(), value=TRUE))

# waves
hillscene(tilt=0,
   color=grep("aqua", colors(), value=TRUE))