xtorcga/dist/src/csg/node.js

Xtor Compute Geometry Algorithm Libary 计算几何算法库

"use strict";
/*
 * @Description  :
 * @Author       : 赵耀圣
 * @QQ           : 549184003
 * @Date         : 2021-08-03 10:18:26
 * @LastEditTime : 2021-08-03 15:56:34
 * @FilePath     : \cga.js\src\csg\node.ts
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.Node = void 0;
var Node = /** @class */ (function () {
    function Node(polygons) {
        if (polygons === void 0) { polygons = []; }
        this.polygons = polygons;
        if (polygons && polygons.length > 0)
            this.divider = polygons[0].clone();
        var i = 0;
        var plen = polygons.length;
        var front = [], back = [];
        if (this.divider)
            for (i = 0; i < plen; i++) {
                this.divider.splitPolygon(polygons[i], this.polygons, this.polygons, front, back);
            }
        if (front.length > 0) {
            this.front = new Node(front);
        }
        if (back.length > 0) {
            this.back = new Node(back);
        }
    }
    Node.prototype.clone = function () {
        var node = new Node();
        if (this.divider)
            node.divider = this.divider.clone();
        node.polygons = this.polygons.map(function (polygon) {
            return polygon.clone();
        });
        node.front = this.front && this.front.clone();
        node.back = this.back && this.back.clone();
        return node;
    };
    Node.prototype.invert = function () {
        var i, polygon_count, temp;
        for (i = 0, polygon_count = this.polygons.length; i < polygon_count; i++) {
            this.polygons[i].flip();
        }
    };
    Node.prototype.clipPolygons = function (polygons) {
        var i, plen, front = [], back = [];
        if (!this.divider)
            return polygons.slice();
        front = [];
        back = [];
        for (i = 0, plen = polygons.length; i < plen; i++) {
            this.divider.splitPolygon(polygons[i], front, back, front, back);
        }
        if (this.front)
            front = this.front.clipPolygons(front);
        if (this.back)
            back = this.back.clipPolygons(back);
        else
            back = [];
        return front.concat(back);
    };
    Node.prototype.clipTo = function (node) {
        this.polygons = node.clipPolygons(this.polygons);
        if (this.front)
            this.front.clipTo(node);
        if (this.back)
            this.back.clipTo(node);
    };
    return Node;
}());
exports.Node = Node;