Create ggpattern-compatible pattern parameters

Converts Cheysson pattern specifications to parameters suitable for ggpattern geoms.

Usage

cheysson_pattern_params(patterns, param = "fill")

Arguments

patterns

List of pattern specifications from cheysson_pattern()

param

Which parameter to extract: "type", "fill", "pattern_fill", "pattern_fill2", "pattern_angle", "pattern_density", "pattern_spacing", or "pattern_type". "pattern_fill2" is the color of a crosshatch's second set of lines; it equals "pattern_fill" except for the two-color crosshatches in 1883_30 and 1886_17.

Value

Vector of parameter values

Examples

patterns <- cheysson_pattern("1881_12")
cheysson_pattern_params(patterns, "fill")
#> [1] "transparent" "transparent" "transparent"
cheysson_pattern_params(patterns, "pattern_angle")
#> [1] 135  45  45