nr_rect.Rd

% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/nr-draw.R
\name{nr_rect}
\alias{nr_rect}
\title{Draw rectangles on a \code{nativeRaster} image}
\usage{
nr_rect(
  nr,
  x,
  y,
  w,
  h,
  fill = "black",
  color = NA,
  hjust = 0,
  vjust = 0,
  linewidth = 1,
  mode = draw_mode$respect_alpha
)
}
\arguments{
\item{nr}{\code{nativeRaster}}

\item{x, y}{coordinates of lower left corner of rectangle.  [vector]}

\item{w, h}{width and height of rectangle. [vector]}

\item{fill}{interior fill color [vector]}

\item{color}{outline color. Default: NA. [vector]}

\item{hjust, vjust}{specify horizontal and vertical justification of the 
\code{src} image.  e.g. \code{hjust = vjust = 0} the blitting
starts at the top-left of the image. Use \code{hjust = vjust = 0.5}
to treat the centre of the \code{src_} as the blitting origin.
Default (0, 0)}

\item{linewidth}{Line linewidth. Default: 1.  If \code{linewidth = 1} then a 
naive version of Bresenham is used to draw the points.  If linewidth 
is greater than 1, then the line is convert to a triangle strip and
rendered as polygons.}

\item{mode}{drawing mode.}
}
\value{
Original \code{nativeRaster} modified in-place
}
\description{
Draw rectangles on a \code{nativeRaster} image
}
\examples{
N <- 200
nr <- nr_new(N, N, 'grey80')
nr_rect(nr, x = c(0, N/2 - 1), y = c(0, N/2 - 1), w = N/2, h = N/4, 
        fill = 'blue', color = c('red', 'green'), linewidth = 3)
plot(nr, TRUE)

}