From 51e182024207ec893cd0ed1b8f8d971341afb4a9 Mon Sep 17 00:00:00 2001
From: aozhiwei <aozhiwe@kingsome.cn>
Date: Thu, 28 May 2020 19:05:03 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E9=A9=AC=E5=93=88=E9=A1=BF?=
 =?UTF-8?q?=E8=B7=9D=E7=A6=BB=E5=88=A4=E6=96=AD?=
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---
 a8/vec2.cc | 6 ++++++
 a8/vec2.h  | 1 +
 2 files changed, 7 insertions(+)

diff --git a/a8/vec2.cc b/a8/vec2.cc
index 00e1075..bf27a79 100644
--- a/a8/vec2.cc
+++ b/a8/vec2.cc
@@ -98,6 +98,12 @@ namespace a8
         return v.Norm();
     }
 
+    float Vec2::ManhattanDistance(const Vec2& b)
+    {
+        float distance = std::fabs(x - b.x) + std::fabs(y - b.y);
+        return distance;
+    }
+
     Vec2 Vec2::Perp()
     {
         return Vec2(y, -x);
diff --git a/a8/vec2.h b/a8/vec2.h
index d6141d4..a8bd245 100644
--- a/a8/vec2.h
+++ b/a8/vec2.h
@@ -16,6 +16,7 @@ namespace a8
         float CalcAngleEx(const Vec2& b);
         static Vec2 FromAngle(float angle);
         float Distance(const Vec2& b);
+        float ManhattanDistance(const Vec2& b);
 
         bool operator == (const Vec2& b) const;
         Vec2 operator + (const Vec2& b) const;