geo_stretch: Stretch geometric objects

In EhrmannS/geometr: Generate and Modify Interoperable Geometric Objects

Stretch geometric objects

Description

Stretch geometric objects by a scale factor in x and y dimension.

Usage

geo_stretch(obj, x = NULL, y = NULL, fid = NULL, update = TRUE)

Arguments

obj	gridded(1) the object to stretch.
x	numeric(1) the scale factor in x dimension.
y	numeric(1) the scale factor in y dimension.
fid	integerish(.) in case only a subset of features shall be stretched, specify that here.
update	logical(1) whether or not to update the window slot after stretching.

Value

geom of the stretched obj.

See Also

Other geometry tools: geo_filter(), geo_locate(), geo_pull(), geo_reflect(), geo_rotate(), geo_scale(), geo_skew(), geo_translate()

Examples

# stretch several features
geo_vis(gtGeoms$polygon, linewidth = 3)
newPoly <- geo_stretch(obj = gtGeoms$polygon, x = 0.5, y = 0.2,
                       update = FALSE)
geo_vis(geom = newPoly, linecol = "green", new = FALSE)

# stretch a single feature
geo_vis(gtGeoms$polygon, linewidth = 3)
newPoly <- geo_stretch(obj = gtGeoms$polygon, x = 0.5, fid = 2, update = FALSE)
geo_vis(geom = newPoly, linecol = "green", new = FALSE)

# stretch feature separately
geo_vis(gtGeoms$polygon, linewidth = 3)
newPoly <- geo_stretch(obj = gtGeoms$polygon,
                      x = c(0.2, 1),
                      y = c(1, 0.2),
                      update = FALSE)
geo_vis(geom = newPoly, linecol = "green", new = FALSE)

EhrmannS/geometr documentation built on Jan. 31, 2024, 9:13 a.m.