rotate_vec_ccw: Rotate 2D vectors by an angle (counter-clockwise)

In SamsaRaLight: Simulate Tree Light Transmission Using Ray-Tracing

Rotate 2D vectors by an angle (counter-clockwise)

Description

Internal utility to rotate 2D coordinates by a given angle (in radians), using a standard rotation matrix.

Usage

rotate_vec_ccw(x, y, theta)

Arguments

x	Numeric vector of x coordinates.
y	Numeric vector of y coordinates.
theta	Rotation angle in radians (counter-clockwise).

Details

The rotation follows:

x' = x \cos(\theta) - y \sin(\theta)

y' = x \sin(\theta) + y \cos(\theta)

Value

A data.frame with rotated coordinates:

x

Rotated x coordinates

y

Rotated y coordinates

SamsaRaLight documentation built on April 16, 2026, 5:08 p.m.