Function getHVEdgeIntersections

src/traces/scatter/line_points.js:191–200

(pt1, pt2)

    // for line shapes hv and vh, movement in the two dimensions is decoupled,
    // so all we need to do is constrain each dimension independently
    function getHVEdgeIntersections(pt1, pt2) {
        var out = [];
        var ptInt1 = onlyConstrainedPoint(pt1);
        var ptInt2 = onlyConstrainedPoint(pt2);
        if(ptInt1 && ptInt2 && sameEdge(ptInt1, ptInt2)) return out;

        if(ptInt1) out.push(ptInt1);
        if(ptInt2) out.push(ptInt2);
        return out;
    }

    // hvh and vhv we sometimes have to move one of the intersection points
    // out BEYOND the clipping rect, by a maximum of a factor of 2, so that