Algorithm (Workflow)

This algorithm is designed to mirror a 2D or 3D point/vertex list at the x-axis. It is part of the SolidGeometry library and was introduced by Tim Lueth in 2013.

Input Parameters

• VL: This is the input vertex list, which can be a 2D or 3D array of points. Each row represents a point, and the columns represent the x, y, and possibly z coordinates.

Output Results

• RVL: This is the resulting vertex list after mirroring the input list at the x-axis.

Algorithm Explanation

The function VLswapX takes a vertex list VL as input and returns a new vertex list RVL that is mirrored at the x-axis. The mirroring is achieved by negating the x-coordinates of each point in the list.

Steps

1. Initialize RVL as a copy of VL.
2. Negate the x-coordinates of all points in RVL. This is done by multiplying the first column of RVL by -1.
3. Return the modified RVL as the output.

Code Explanation

function RVL=VLswapX(VL)
    RVL=VL; % Copy the input vertex list to RVL
    RVL=[-RVL(:,1) RVL(:,2:size(RVL,2))]; % Negate the x-coordinates
end