compute_polygon_centroid: Compute polygon centroid

In mathiasisaksen/artKIT: Useful functions for creating visual/generative art

Description

This function takes in a data frame containing one or more polygons, and computes the centroid (geometric center) of each polygon.

Usage

compute_polygon_centroid(vertex.df)

Arguments

vertex.df

A data frame where each row corresponds to the vertex of a polygon. It must contain the columns x, y, and optionally group (must be integer). x and y specify the coordinates of the vertex, and group is used to indicate which polygon the vertex belongs to. If vertex.df contains only a single polygon, group can be omitted.

Value

A data frame that contains three columns:

group	The group number of the polygon
x, y	The coordinates of the centroid

Author(s)

Mathias Isaksen [e-mail]

Examples

# Example with multiple polygons
vertex.df = compute_regular_polygons(
 center = data.frame(x = c(0, 10), y = c(0, 0)),
 radius = 1,
 num.edges = c(4, 1000)
)
centroid.df = compute_polygon_centroid(vertex.df)

# Centroids should be (0, 0) and c(10, 0)
print(centroid.df)

mathiasisaksen/artKIT documentation built on Dec. 21, 2021, 2:52 p.m.