swOperation/node_modules/@antv/path-util/lib/fill-path.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
function decasteljau(points, t) {
    var left = [];
    var right = [];
    function recurse(points, t) {
        if (points.length === 1) {
            left.push(points[0]);
            right.push(points[0]);
        }
        else {
            var middlePoints = [];
            for (var i = 0; i < points.length - 1; i++) {
                if (i === 0) {
                    left.push(points[0]);
                }
                if (i === points.length - 2) {
                    right.push(points[i + 1]);
                }
                middlePoints[i] = [(1 - t) * points[i][0] + t * points[i + 1][0], (1 - t) * points[i][1] + t * points[i + 1][1]];
            }
            recurse(middlePoints, t);
        }
    }
    if (points.length) {
        recurse(points, t);
    }
    return { left: left, right: right.reverse() };
}
function splitCurve(start, end, count) {
    var points = [[start[1], start[2]]];
    count = count || 2;
    var segments = [];
    if (end[0] === 'A') {
        points.push(end[6]);
        points.push(end[7]);
    }
    else if (end[0] === 'C') {
        points.push([end[1], end[2]]);
        points.push([end[3], end[4]]);
        points.push([end[5], end[6]]);
    }
    else if (end[0] === 'S' || end[0] === 'Q') {
        points.push([end[1], end[2]]);
        points.push([end[3], end[4]]);
    }
    else {
        points.push([end[1], end[2]]);
    }
    var leftSegments = points;
    var t = 1 / count;
    for (var i = 0; i < count - 1; i++) {
        var rt = t / (1 - t * i);
        var split = decasteljau(leftSegments, rt);
        segments.push(split.left);
        leftSegments = split.right;
    }
    segments.push(leftSegments);
    var result = segments.map(function (segment) {
        var cmd = [];
        if (segment.length === 4) {
            cmd.push('C');
            cmd = cmd.concat(segment[2]);
        }
        if (segment.length >= 3) {
            if (segment.length === 3) {
                cmd.push('Q');
            }
            cmd = cmd.concat(segment[1]);
        }
        if (segment.length === 2) {
            cmd.push('L');
        }
        cmd = cmd.concat(segment[segment.length - 1]);
        return cmd;
    });
    return result;
}
function splitSegment(start, end, count) {
    if (count === 1) {
        return [[].concat(start)];
    }
    var segments = [];
    if (end[0] === 'L' || end[0] === 'C' || end[0] === 'Q') {
        segments = segments.concat(splitCurve(start, end, count));
    }
    else {
        var temp = [].concat(start);
        if (temp[0] === 'M') {
            temp[0] = 'L';
        }
        for (var i = 0; i <= count - 1; i++) {
            segments.push(temp);
        }
    }
    return segments;
}
function fillPath(source, target) {
    if (source.length === 1) {
        return source;
    }
    var sourceLen = source.length - 1;
    var targetLen = target.length - 1;
    var ratio = sourceLen / targetLen;
    var segmentsToFill = [];
    if (source.length === 1 && source[0][0] === 'M') {
        for (var i = 0; i < targetLen - sourceLen; i++) {
            source.push(source[0]);
        }
        return source;
    }
    for (var i = 0; i < targetLen; i++) {
        var index = Math.floor(ratio * i);
        segmentsToFill[index] = (segmentsToFill[index] || 0) + 1;
    }
    var filled = segmentsToFill.reduce(function (filled, count, i) {
        if (i === sourceLen) {
            return filled.concat(source[sourceLen]);
        }
        return filled.concat(splitSegment(source[i], source[i + 1], count));
    }, []);
    filled.unshift(source[0]);
    if (target[targetLen] === 'Z' || target[targetLen] === 'z') {
        filled.push('Z');
    }
    return filled;
}
exports.default = fillPath;
//# sourceMappingURL=fill-path.js.map