50 lines
2.0 KiB
JavaScript
50 lines
2.0 KiB
JavaScript
"use strict";
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var _const = require("../const.js");
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class Polygon {
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/**
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* @param {PIXI.IPointData[]|number[]} points - This can be an array of Points
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* that form the polygon, a flat array of numbers that will be interpreted as [x,y, x,y, ...], or
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* the arguments passed can be all the points of the polygon e.g.
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* `new Polygon(new Point(), new Point(), ...)`, or the arguments passed can be flat
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* x,y values e.g. `new Polygon(x,y, x,y, x,y, ...)` where `x` and `y` are Numbers.
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*/
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constructor(...points) {
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let flat = Array.isArray(points[0]) ? points[0] : points;
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if (typeof flat[0] != "number") {
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const p = [];
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for (let i = 0, il = flat.length; i < il; i++)
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p.push(flat[i].x, flat[i].y);
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flat = p;
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}
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this.points = flat, this.type = _const.SHAPES.POLY, this.closeStroke = !0;
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}
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/**
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* Creates a clone of this polygon.
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* @returns - A copy of the polygon.
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*/
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clone() {
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const points = this.points.slice(), polygon = new Polygon(points);
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return polygon.closeStroke = this.closeStroke, polygon;
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}
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/**
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* Checks whether the x and y coordinates passed to this function are contained within this polygon.
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* @param x - The X coordinate of the point to test.
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* @param y - The Y coordinate of the point to test.
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* @returns - Whether the x/y coordinates are within this polygon.
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*/
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contains(x, y) {
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let inside = !1;
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const length = this.points.length / 2;
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for (let i = 0, j = length - 1; i < length; j = i++) {
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const xi = this.points[i * 2], yi = this.points[i * 2 + 1], xj = this.points[j * 2], yj = this.points[j * 2 + 1];
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yi > y != yj > y && x < (xj - xi) * ((y - yi) / (yj - yi)) + xi && (inside = !inside);
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}
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return inside;
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}
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}
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Polygon.prototype.toString = function() {
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return `[@pixi/math:PolygoncloseStroke=${this.closeStroke}points=${this.points.reduce((pointsDesc, currentPoint) => `${pointsDesc}, ${currentPoint}`, "")}]`;
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};
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exports.Polygon = Polygon;
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//# sourceMappingURL=Polygon.js.map
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