点与其他几何体的距离

3D 点是有 x,y,z 三个坐标组成，类名 Point，

三维向量点

import * as cga from "@xtor/cga";
function randomV3() {
  return cga.Vec3(
    Math.random() * 100 - 50,
    Math.random() * 100,
    Math.random() * 100 - 50
  );
}

点与点的距离

计算点到点的距离

import * as cga from "@xtor/cga";
var point0 = new cga.Vec3().copy(randomV3());
var point1 = new cga.Vec3().copy(randomV3());
var result = point0.distancePoint(point1);

点到直线的距离

计算点到直线的距离

import * as cga from "@xtor/cga";
var point = new cga.Vec3().copy(randomV3());
var line = new cga.Line(randomV3(), randomV3());
var result = point.distanceTo(line);

点到射线的距离

import * as cga from "@xtor/cga";
var point = new cga.Vec3().copy(randomV3());
var ray = new cga.Ray(randomV3(), randomV3().normalize());
var result = point.distanceRay(ray);

点到线段的距离

import * as cga from "@xtor/cga";
var point = new cga.Vec3().copy(randomV3());
var seg = new cga.Segment(randomV3(), randomV3());
var result = point.distanceSegment(seg);

点到折线的距离

import * as cga from "@xtor/cga";
var vs = [];
for (let i = 0; i < 100000; i++) {
  vs.push(randomV3());
}
var point = new cga.Vec3().copy(randomV3());
var polyline = new cga.Polyline(vs);
console.time("测试法");
var result = point.distancePolyline(polyline);
console.timeEnd("测试法");
// console.time("线性检索");
// var result1 = point.distancePolyLine1(polyline);
// console.timeEnd("线性检索");
//测试法大规模数据要比线性检索快两倍以上

点到圆圈的距离

var point = new cga.Vec3().copy(randomV3());
var circle = new cga.Circle(randomV3(), 5);
var result = point.distanceCircle(circle);
infoPanel.innerText = JSON.stringify(result);

点与三角形的距离测试

var point = new cga.Vec3().copy(randomV3());
var triangle = new cga.Triangle(randomV3(), randomV3(), randomV3());
var result = point.distanceTriangle(triangle);
infoPanel.innerText = JSON.stringify(result);

点到圆盘的距离