From 120fb04b6d79c80fd66a12e2c9ffa98ae1ccfb05 Mon Sep 17 00:00:00 2001
From: ChenX <maple6@vip.qq.com>
Date: Thu, 14 Feb 2019 16:55:49 +0800
Subject: [PATCH] =?UTF-8?q?=E6=96=B0=E5=A2=9E=E5=87=BD=E6=95=B0=E5=88=A4?=
 =?UTF-8?q?=E6=96=AD1=E7=BB=B4=E7=BA=BF=E6=AE=B5=E4=BA=A4=E9=9B=86?=
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---
 src/Geometry/GeUtils.ts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/Geometry/GeUtils.ts b/src/Geometry/GeUtils.ts
index 3145ae9b0..76518a60d 100644
--- a/src/Geometry/GeUtils.ts
+++ b/src/Geometry/GeUtils.ts
@@ -7,6 +7,14 @@ export const cXAxis = new Vector3(1, 0, 0);
 export const cYAxis = new Vector3(0, 1, 0);
 export const cZAxis = new Vector3(0, 0, 1);
 
+/**
+ * 判断一维线段a和b是否存在交集
+ */
+function isIntersect(amin: number, amax: number, bmin: number, bmax: number, eps = 0)
+{
+    return Math.max(amin, bmin) + eps < Math.min(amax, bmax);
+}
+
 /**
  * 旋转一个点,旋转中心在原点
  *