Display an apparent cylinder
Display rectangles shaded to appear like cylinders.
cylindrect(xleft,ybottom,xright,ytop,col,border=NA,gradient="x",nslices=50)
xleft |
The position of the left side of the rectangle(s). |
ybottom |
The position of the bottom of the rectangle(s). |
xright |
The position of the right side of the rectangle(s). |
ytop |
The position of the top side of the rectangle(s). |
col |
The base color(s) of the rectangles. |
border |
Whether to draw a border and what color. |
gradient |
Whether to vary the shading horizontally ("x" - the default) or vertically (anything but "x"). |
nslices |
The number of "slices" of color for shading. |
cylindrect displays a rectangle filled with "slices" of color that simulate the appearance of a cylinder. The slices are calculated so that the base color appears at the right or bottom edge of the rectangle, becomes progressively lighter to a "highlight" at two thirds of the width or height and then darkens toward the base color again.
The appearance is of a cylinder lit from above and to the left of the viewer. The position of the apparent light source is hard coded into the function.
The base color(s) of the rectangle(s).
Jim Lemon
plot(0,xlim=c(0,5),ylim=c(0,5),main="Examples of pseudocylindrical rectangles", xlab="",ylab="",axes=FALSE,type="n") cylindrect(0,0,1,5,"red") cylindrect(rep(1,3),c(0,2,4),rep(4,3),c(1,3,5),"green",gradient="y") cylindrect(4,0,5,5,"#8844aa")
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.