R/drawCircles.R

In GladiaTOX: R Package for Processing High Content Screening data

#####################################################################
## This program is distributed in the hope that it will be useful, ##
## but WITHOUT ANY WARRANTY; without even the implied warranty of  ##
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the    ##
## GNU General Public License for more details.                    ##
#####################################################################

#-------------------------------------------------------------------------------
# drawCircles: draw circles on the current plot device
#-------------------------------------------------------------------------------

#' @importFrom graphics polygon

.drawCircles <- function(x, y, r, border="black", col=NA,
                        lwd=1, lty="solid", n=100) {

    if (length(x) < length(y)) {
        x <- rep(x, length.out=length(y))
    }

    if (length(y) < length(x)) {
        y <- rep(y, length.out=length(x))
    }

    inc <- 2*pi/n
    angles <- angles <- seq(0, 2*pi-inc, by=inc)

    if (length(col) < length(x)) {
        col <- rep(col, length.out=length(x))
    }

    if (length(r) < length(x)) {
        r <- rep(r, length.out=length(x))
    }

    if (length(lwd) < length(x)) {
        lwd <- rep(lwd, length.out=length(x))
    }

    if (length(lty) < length(x)) {
        lty <- rep(lty, length.out=length(x))
    }

    if (length(border) < length(x)) {
        border <- rep(border, length.out=length(x))
    }

    invisible(
        lapply(
            seq_len(length(x)),
            function(i) {
                xv <- cos(angles) * r[i] + x[i]
                yv <- sin(angles) * r[i] + y[i]
                polygon(
                    xv, yv,
                    border=border[i],
                    col=col[i],
                    lty=lty[i],
                    lwd=lwd[i]
                )
            }
        )
    )

}

#-------------------------------------------------------------------------------