Rotate: Rotates a geometric object

In LearnGeom: Learning Plane Geometry

Description

Rotate rotates a geometric object of any of the following types: line, polygon or segment

Usage

Rotate(object, fixed, angle)

Arguments

object	geometric object of type line, polygon or segment, previously created with any of the functions in the package
fixed	Vector containing the xy-coordinates of the only point of the plane which remains fixed during rotation
angle	Angle of rotation in degrees (0-360), considering the clockwise direction

Value

Returns a geometric object which is the rotation of the original one, following the clockwise direction

Examples

x_min <- -5
x_max <- 5
y_min <- -5
y_max <- 5
CoordinatePlane(x_min, x_max, y_min, y_max)
P1 <- c(0,0)
P2 <- c(1,1)
P3 <- c(2,0) 
Poly <- CreatePolygon(P1, P2, P3)
Draw(Poly, "blue")
fixed <- c(-1,-1)
angle <- 30
Poly_rotated <- Rotate(Poly, fixed, angle)
Draw(Poly_rotated, "orange")
fixed <- c(2,0)
Poly_rotated <- Rotate(Poly, fixed, angle)
Draw(Poly_rotated, "transparent")

Example output

NULL
[1] "Some of the inserted points are collinear. This could lead to a defective polygon."
NULL
NULL
NULL

LearnGeom documentation built on July 14, 2020, 5:06 p.m.