Function makeLine

tests/geom/intersects/TriangleToLine.test.js:6–9

(x1, y1, x2, y2)

{
    // Helper: create a mock line with x1,y1,x2,y2
    function makeLine(x1, y1, x2, y2)
    {
        return { x1: x1, y1: y1, x2: x2, y2: y2 };
    }

    // Helper: create a mock triangle with an axis-aligned right triangle
    // vertices: (0,0), (100,0), (0,100)