Function updateInteractiveLayer

src/models/scatter.js:236–458

()

            g.attr('clip-path', clipEdge ? 'url(#nv-edge-clip-' + id + ')' : '');

            function updateInteractiveLayer() {
                // Always clear needs-update flag regardless of whether or not
                // we will actually do anything (avoids needless invocations).
                needsUpdate = false;

                if (!interactive) return false;

                // inject series and point index for reference into voronoi
                if (useVoronoi === true) {

                    // nuke all voronoi paths on reload and recreate them
                    wrap.select('.nv-point-paths').selectAll('path').remove();

                    var vertices = d3.merge(data.map(function(group, groupIndex) {
                            return group.values
                                .map(function(point, pointIndex) {
                                    // *Adding noise to make duplicates very unlikely
                                    // *Injecting series and point index for reference
                                    // *Adding a 'jitter' to the points, because there's an issue in d3.geom.voronoi.
                                    var pX = getX(point,pointIndex);
                                    var pY = getY(point,pointIndex);

                                    return [nv.utils.NaNtoZero(x(pX)) + Math.random() * 1e-4,
                                            nv.utils.NaNtoZero(y(pY)) + Math.random() * 1e-4,
                                        groupIndex,
                                        pointIndex, point];
                                })
                                .filter(function(pointArray, pointIndex) {
                                    return pointActive(pointArray[4], pointIndex); // Issue #237.. move filter to after map, so pointIndex is correct!
                                })
                        })
                    );

                    if (vertices.length == 0) return false;  // No active points, we're done
                    if (vertices.length < 3) {
                        // Issue #283 - Adding 2 dummy points to the voronoi b/c voronoi requires min 3 points to work
                        vertices.push([x.range()[0] - 20, y.range()[0] - 20, null, null]);
                        vertices.push([x.range()[1] + 20, y.range()[1] + 20, null, null]);
                        vertices.push([x.range()[0] - 20, y.range()[0] + 20, null, null]);
                        vertices.push([x.range()[1] + 20, y.range()[1] - 20, null, null]);
                    }

                    // keep voronoi sections from going more than 10 outside of graph
                    // to avoid overlap with other things like legend etc
                    var bounds = d3.geom.polygon([
                        [-10,-10],
                        [-10,height + 10],
                        [width + 10,height + 10],
                        [width + 10,-10]
                    ]);

                    // delete duplicates from vertices - essential assumption for d3.geom.voronoi
                    var epsilon = 1e-4; // Uses 1e-4 to determine equivalence.
                    vertices = vertices.sort(function(a,b){return ((a[0] - b[0]) || (a[1] - b[1]))});
                    for (var i = 0; i < vertices.length - 1; ) {
                        if ((Math.abs(vertices[i][0] - vertices[i+1][0]) < epsilon) &&
                        (Math.abs(vertices[i][1] - vertices[i+1][1]) < epsilon)) {
                            vertices.splice(i+1, 1);