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## =============================================================================
## 3-d spherical surface
## =============================================================================
spheresurf3D <- function(colvar = matrix(nrow = 50, ncol = 50, data = 1:50, byrow = TRUE),
..., phi = 0, theta = 0,
col = NULL, NAcol = "white", breaks = NULL,
border = NA, facets = TRUE,
contour = FALSE, colkey = NULL, resfac = 1,
panel.first = NULL, clim = NULL, clab = NULL,
bty = "n", lighting = FALSE, shade = NA, ltheta = -135, lphi = 0,
inttype = 1, full = FALSE, add = FALSE, plot = TRUE) {
plist <- initplist(add)
r <- 1 # sphere radius
if (!is.matrix(colvar))
stop("'colvar' should be a matrix or absent")
X <- seq(0, 2*pi, length = nrow(colvar))
Y <- seq(0, pi, length = ncol(colvar))
# change resolution
if (any(resfac != 1)) {
res <- changeres(resfac, X, Y, colvar)
X <- res$x
Y <- res$y
colvar <- res$z
}
# check contours
contour <- check.args(contour)
cv <- colvar
M <- mesh(X, Y)
x <- with (M, -r*cos(x)*sin(y))
y <- with (M, -r*sin(y)*sin(x))
z <- with (M, -r*cos(y))
dot <- splitdotpersp(list(...), bty, lighting,
x, y, z, plist = plist, shade, lphi, ltheta, breaks = breaks)
DD <- dim(x)
if (is.null(col))
if (is.null(breaks))
col <- jet.col(100)
else
col <- jet.col(length(breaks)-1)
CC <- check.colvar.persp(colvar, z, col, inttype, clim, dot$alpha)
colvar <- CC$colvar
col <- CC$col
if (is.null(clim))
clim <- range(colvar, na.rm = TRUE)
if (dot$clog) {
colvar <- log(colvar)
clim <- log(clim)
}
iscolkey <- is.colkey(colkey, col)
if (iscolkey)
colkey <- check.colkey(colkey)
Extend <- inttype == 2
if (is.null(plist)) {
do.call("perspbox", c(alist(x = range(x), y = range(y),
z = range(z, na.rm = TRUE),
phi = phi, theta = theta, plot = plot,
colkey = colkey, col = col), dot$persp))
plist <- getplist()
}
breaks <- check.breaks(breaks, col)
if (is.function(panel.first))
panel.first(plist$mat)
Poly <- paintit(colvar, x, y, z, plist, col, NAcol, clim, border,
facets, dot$points$lwd, dot$points$lty, dot, Extend, !full,
breaks = breaks)
if (contour$add) {
contour$side <- NULL #"z"
Pmin <- min(Poly$img[[1]]$sl$Proj) # minimal projection depth behind which lines not drawn
col.lines <- contour$args$col
if (is.null(col.lines))
col.lines <- "black"
segm <- NULL
if (is.null( contour$args$nlevels))
contour$args$nlevels <- 10
if (is.null( contour$args$levels))
contour$args$levels <- pretty(range(cv, na.rm = TRUE), contour$args$nlevels)
line.list <- do.call("contourLines",
alist(x = X, y = Y, z = cv, nlevels = contour$args$nlevels,
levels = contour$args$levels))
contour$args$nlevels <- contour$args$col <- contour$args$levels <- NULL
for (i in 1:length(line.list)) {
clines <- line.list[[i]]
X <- clines$x; Y <- clines$y
x <- -r*cos(X)*sin(Y)
y <- -r*sin(Y)*sin(X)
z <- -r*cos(Y)
sl <- sortlistvec(x, y, z, plist, ignorez = FALSE)
isel <- which(sl$Proj > Pmin)
if (length(isel) > 1) {
segm <- do.call("addlines", c(alist(segm, x[isel], y[isel],
z[isel], col = col.lines, plist = plist, ignorez = FALSE), contour$args))
}
}
if (! is.null(segm))
segm$proj <- segm$proj + 1e-1 # put it on foreground...
} else
segm <- NULL
if (iscolkey)
plist <- plistcolkey(plist, colkey, col, clim, clab,
dot$clog, type = "spheresurf3D", breaks = breaks)
plist <- plot_struct_3D(plist, poly = Poly, segm = segm, plot = plot)
setplist(plist)
invisible(plist$mat)
}
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