From d3dda667b39e202ef13c6756578c987aaa1c04f8 Mon Sep 17 00:00:00 2001
From: jiaming <743192023@qq.com>
Date: Sat, 15 Dec 2018 19:16:53 +0800
Subject: [PATCH] add  get point to line min distance fun

---
 src/plugins/methodsExtend.js | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/plugins/methodsExtend.js b/src/plugins/methodsExtend.js
index 789830b..07843be 100644
--- a/src/plugins/methodsExtend.js
+++ b/src/plugins/methodsExtend.js
@@ -46,6 +46,22 @@ export function filterNull (arr) {
   return tmpArr
 }
 
+export function getPointDistance (pointOne, pointTwo) {
+  const minusX = Math.abs(pointOne[0] - pointTwo[0])
+
+  const minusY = Math.abs(pointOne[1] - pointTwo[1])
+
+  return Math.sqrt(minusX * minusX + minusY * minusY)
+}
+
+export function getPointToLineDistance (point, linePointOne, linePointTwo) {
+  const a = getPointDistance(point, linePointOne)
+  const b = getPointDistance(point, linePointTwo)
+  const c = getPointDistance(linePointOne, linePointTwo)
+
+  return 0.5 * Math.sqrt((a + b + c) * (a + b - c) * (a + c - b) * (b + c - a)) / c
+}
+
 export default function (Vue) {
   Vue.prototype.deepClone = deepClone
   Vue.prototype.deleteArrayAllItems = deleteArrayAllItems
@@ -53,4 +69,6 @@ export default function (Vue) {
   Vue.prototype.multipleSum = multipleSum
   Vue.prototype.randomExtend = randomExtend
   Vue.prototype.filterNull = filterNull
+  Vue.prototype.getPointDistance = getPointDistance
+  Vue.prototype.getPointToLineDistance = getPointToLineDistance
 }