Plot a Tetrahedral Color Space

Description

tcsplot produces a 3D plot of a tetrahedral color space using OpenGL capabilities

tcspoints plots points in a tetrahedral color space

tcsvol produces a 3D convex hull in tetrahedral color space

Usage

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tcsplot(tcsdata, size = 0.02, alpha = 1, col = "black",
  vertexsize = 0.02, achrosize = 0.01, achrocol = "grey", lwd = 1,
  lcol = "lightgrey", new = FALSE, hspin = FALSE, vspin = FALSE,
  floor = TRUE, grid = TRUE, fill = TRUE)

tcspoints(tcsdata, size = 0.02, col = "black", alpha = 1)

tcsvol(tcsdata, col = "black", alpha = 0.2, grid.alpha = 1, grid = T,
  fill = T)

Arguments

tcsdata

(required) a data frame, possibly a result from the tcs function, containing values for the 'x', 'y' and 'z' coordinates as columns (labeled as such)

size

size of the points in the plot (defaults to 0.02)

alpha

transparency of points (or volume fill in tcsvol)

col

color of the points in the plot (defaults to black)

vertexsize

size of the points at the vertices

achrosize

size of the point in the achromatic center

achrocol

color of the point in the achromatic center

lwd

line width for the edges of the tetrahedron

lcol

line color for the edges of the tetrahedron

new

should a new 3D plot be called (defaults to FALSE)?

hspin

if TRUE, the graphic will spin horizontally (around the 'z' axis)(defaults to FALSE)

vspin

if TRUE, the graphic will spin vertically (around the 'x' axis)(defaults to FALSE)

floor

if TRUE, a reference xy plane is plotted under the tetrahedron (defaults to TRUE)

grid

if TRUE, connects the polygon outlining the volume occupied by points (defaults to TRUE)

fill

if TRUE, fills the volume occupied by points (WARNING: transparency is not saved properly if exported using rgl.postscript)(defaults to TRUE).

grid.alpha

transparecny of the volume polygon grid lines

Value

tcsplot creates a 3D plot using functions of the package rgl, based on openGL capabilities. Plot is interactive and can be manipulated with the mouse (left button: rotate along 'z' axis; right button: rotate along 'x' axis; third button: zoom). tcsvol creates polygon based on points, determining the volume occupied by them in the colorspace. tcspoints adds points to the plot. Points are currently plotted only as spheres to maintain export capabilities.

tcspoints creates 3D points in a tetrahedral color space plot produced by tcsplot using functions of the package rgl, based on openGL capabilities.

tcsvol creates a 3D convex hull within a tcsplot object

Author(s)

Rafael Maia rm72@zips.uakron.edu

References

Stoddard, M. C., & Prum, R. O. (2008). Evolution of avian plumage color in a tetrahedral color space: A phylogenetic analysis of new world buntings. The American Naturalist, 171(6), 755-776.

Endler, J. A., & Mielke, P. (2005). Comparing entire colour patterns as birds see them. Biological Journal Of The Linnean Society, 86(4), 405-431.

See Also

spheres3d,rgl.postscript, rgl.snapshot,rgl.material

Examples

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## Not run: 
# For plotting
data(sicalis)
vis.sicalis <- vismodel(sicalis, visual='avg.uv')
tcs.sicalis <- tcs(vis.sicalis)
tcsplot(tcs.sicalis, size=0.005)
rgl.postscript('testplot.pdf',fmt='pdf') 
rgl.snapshot('testplot.png')

# For adding points
patch <- rep(c('C','T','B'),7)
tcs.crown <- subset(tcs.sicalis, 'C') 
tcs.breast <- subset(tcs.sicalis, 'B') 
tcsplot(tcs.crown, col='blue')
tcspoints(tcs.breast, col='red')

# For plotting convex hull
tcsplot(tcs.sicalis, col='blue', size=.005)
tcsvol(tcs.sicalis)
## End(Not run)