Function getABAEdgeIntersections

src/traces/scatter/line_points.js:205–229

(dim, limit0, limit1)

    // out BEYOND the clipping rect, by a maximum of a factor of 2, so that
    // the midpoint line is drawn in the right place
    function getABAEdgeIntersections(dim, limit0, limit1) {
        return function(pt1, pt2) {
            var ptInt1 = onlyConstrainedPoint(pt1);
            var ptInt2 = onlyConstrainedPoint(pt2);

            var out = [];
            if(ptInt1 && ptInt2 && sameEdge(ptInt1, ptInt2)) return out;

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

            var midShift = 2 * Lib.constrain((pt1[dim] + pt2[dim]) / 2, limit0, limit1) -
                ((ptInt1 || pt1)[dim] + (ptInt2 || pt2)[dim]);
            if(midShift) {
                var ptToAlter;
                if(ptInt1 && ptInt2) {
                    ptToAlter = (midShift > 0 === ptInt1[dim] > ptInt2[dim]) ? ptInt1 : ptInt2;
                } else ptToAlter = ptInt1 || ptInt2;

                ptToAlter[dim] += midShift;
            }

            return out;
        };
    }

    var getEdgeIntersections;
    if(shape === 'linear' || shape === 'spline') {