Package 'HatchedPolygons'

Title: Create a hatched area for SpatialPolygons
Description: This package allows to create a area filled by SpatialLines to allow for hatched areas in SpatialPolygons. This may be particularly useful when SpatialPolygons show holes but also for drawing hatched areas in leaflet Polygons.
Authors: Sébastien Rochette [aut, cre], Gregory R. Warnes [ctb]
Maintainer: Sébastien Rochette <[email protected]>
License: GPL-3
Version: 0.3.0.9000
Built: 2024-11-21 04:25:41 UTC
Source: https://github.com/statnmap/HatchedPolygons

Help Index

Return a SpatialLinesDataframe as hatched area for a SpatialPolygons

Description

Return a SpatialLinesDataframe as hatched area for a SpatialPolygons

Usage

hatched.SpatialPolygons(x, density = 10, angle = 45, fillOddEven = FALSE)

Arguments

x

SpatialPolygons* from library sp
density

the density of shading lines, in lines per inch. The default value of NULL means that no shading lines are drawn. A zero value of density means no shading nor filling whereas negative values and NA suppress shading (and so allow color filling).
angle

the slope of shading lines, given as an angle in degrees (counter-clockwise).
fillOddEven

logical controlling the polygon shading mode: see below for details. Default FALSE.

Create hatch area of one polygon

Description

Create hatch area of one polygon

Usage

polygon.fullhatch(
  x,
  y = NULL,
  density,
  angle,
  ..debug.hatch = FALSE,
  fillOddEven = FALSE,
  ...
)

Arguments

x, y

vectors containing the coordinates of the vertices of the polygon.
density

the density of shading lines, in lines per inch. The default value of NULL means that no shading lines are drawn. A zero value of density means no shading nor filling whereas negative values and NA suppress shading (and so allow color filling).
angle

the slope of shading lines, given as an angle in degrees (counter-clockwise).
..debug.hatch

for drawing when debugging function
fillOddEven

logical controlling the polygon shading mode: see below for details. Default FALSE.
...

graphical parameters such as xpd, lend, ljoin and lmitre can be given as arguments.

Examples

## Not run: 
res <- polygon.fullhatch(x, density = 10, angle = 45)
arrows(res$lx1, res$ly1, res$lx2, res$ly2, col = "red", code = 0)

## End(Not run)

Create one line for hatch area of one polygon

Description

Create one line for hatch area of one polygon

Usage

polygon.onehatch(
  x,
  y,
  x0,
  y0,
  xd,
  yd,
  ..debug.hatch = FALSE,
  fillOddEven = FALSE,
  ...
)

Arguments

x, y

vectors containing the coordinates of the vertices of the polygon.
x0

parameter as issued from polygon.fullhatch
y0

parameter as issued from polygon.fullhatch
xd

parameter as issued from polygon.fullhatch
yd

parameter as issued from polygon.fullhatch
..debug.hatch

for drawing when debugging function
fillOddEven

logical controlling the polygon shading mode: see below for details. Default FALSE.
...

graphical parameters such as xpd, lend, ljoin and lmitre can be given as arguments.

Get SpatialLines of one Polygons feature

Description

Get SpatialLines of one Polygons feature

Usage

polygonRingHolesLines(
  Sr,
  density = 0.5,
  angle = 45,
  ID = 1,
  fillOddEven = FALSE
)

Arguments

Sr

An object of class Polygons
density

the density of shading lines, in lines per inch. The default value of NULL means that no shading lines are drawn. A zero value of density means no shading nor filling whereas negative values and NA suppress shading (and so allow color filling).
angle

the slope of shading lines, given as an angle in degrees (counter-clockwise).
ID

Number or string identifying the Polygon inside Polygons
fillOddEven

logical controlling the polygon shading mode: see below for details. Default FALSE.