@antv/g2plot
Version:
G2 Plot, a market of plots built with the Grammar of Graphics'
40 lines • 1.38 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var _ = tslib_1.__importStar(require("@antv/util"));
var text_hide_1 = tslib_1.__importDefault(require("./text-hide"));
/** 根据变化进行抽样，保留变化较大的点，类似于点简化算法 */
function nodesResamplingByChange(shape, option, index, cfg) {
var nodes = cfg.nodes.nodes;
var tolerance = getGlobalTolerance(nodes);
if (index <= 1) {
return;
}
var current = nodes[index];
// const previous = nodes[index-1];
var previous = findPrevious(index, nodes);
var distX = previous.centerX - current.centerX;
var distY = previous.centerY - current.centerY;
var dist = Math.sqrt(distX * distX + distY * distY);
if (dist < tolerance) {
text_hide_1.default(shape);
shape.set('blank', true);
}
}
exports.default = nodesResamplingByChange;
function findPrevious(index, nodes) {
for (var i = index - 1; i > 0; i--) {
var node = nodes[i];
if (!node.shape.get('blank')) {
return node;
}
}
}
function getGlobalTolerance(nodes) {
var nodesClone = _.deepMix([], nodes);
nodesClone.sort(function (a, b) {
return b.width - a.width;
});
return Math.round(nodesClone[0].width);
}
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