新增函数判断1维线段交集

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
  *