adds a box, with shadow on a plot; used for writing text

1 2 3 4 5 |

`box.type ` |
shape of the box. |

`mid ` |
midpoint (x,y) of the box. |

`radx ` |
horizontal radius of the box. |

`rady ` |
vertical radius of the box. |

`shadow.size ` |
relative size of shadow. |

`shadow.col ` |
color of shadow. |

`box.col ` |
fill color of the box. |

`lcol ` |
line color surrounding box. |

`lwd ` |
line width of line surrounding the box. |

`dr ` |
if box is curved: size of segments, in radians, to draw ellipse (decrease for smoother). |

`angle ` |
rotation angle, degrees. |

`len ` |
if |

`nr ` |
if |

`rx ` |
if |

`theta ` |
if |

`... ` |
other arguments. |

one box is drawn, centered aroung point `mid`

and with horizontal and
vertical radiusses `radx`

, `rady`

.

By default, a shadow is drawn, in the right-lower corner of the box.

The shadow color and relative size is specified with `shadow.col`

and
`shadow.size`

respectively.

`shadow.size = 0`

toggles off the drawing of the shadow.

the type of the box is set with `box.type`

which can take on the values:

"rect": a rectangle.

"ellipse": an ellipse.

"diamond": a diamond.

"round": a rectangle with rounded sides.

"hexa": a hexagonal shape.

"multi": a multigonal shape; also input "nr", the number of angles.

"cylinder": a cylindrical shape; also input "len", the length of the cylinder.

"parallel": a parallelogram; “theta” is the angle of the bottom left corner.

the fill-color of the box is specified with `box.col`

;

the line width and color of the box are specified with `lwd`

and
`lcol`

Karline Soetaert <karline.soetaert@nioz.nl>

1 2 3 4 5 6 7 8 9 10 11 12 13 14 | ```
openplotmat(main="shadowbox")
shadowbox(box.type = "rect", mid = c(0.1, 0.5),
rady = 0.1, radx = 0.05, angle = 25)
shadowbox(box.type = "round", mid = c(0.3, 0.5),
rady = 0.05, radx = 0.025, angle = 90,
shadow.col = "darkred")
shadowbox(box.type = "ellipse", mid = c(0.5, 0.5),
rady = 0.05, radx = 0.075, box.col = "blue")
shadowbox(box.type = "multi", mid = c(0.8, 0.5),
rady = 0.05, radx = 0.05, box.col = "darkblue", nr = 5)
``` |

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