From af08d1ae10384dc7131ca2aa409d2d117b559cef Mon Sep 17 00:00:00 2001
From: fan <fanyuhong@joylink.club>
Date: Tue, 10 Oct 2023 09:53:22 +0800
Subject: [PATCH] =?UTF-8?q?=E7=AE=AD=E5=A4=B4=E8=AE=BE=E5=A4=87=E8=B0=83?=
 =?UTF-8?q?=E6=95=B4?=
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---
 src/graphics/arrow/Arrow.ts              | 17 ++++++++++-------
 src/graphics/arrow/ArrowDrawAssistant.ts | 17 ++++++++++-------
 2 files changed, 20 insertions(+), 14 deletions(-)

diff --git a/src/graphics/arrow/Arrow.ts b/src/graphics/arrow/Arrow.ts
index a3fd1cd..c7ef458 100644
--- a/src/graphics/arrow/Arrow.ts
+++ b/src/graphics/arrow/Arrow.ts
@@ -45,13 +45,16 @@ export class Arrow extends JlGraphic implements ILineGraphic {
     this.arrowGraphic.clear();
     this.arrowGraphic.beginFill(ArrowConsts.lineColor, 1);
     if (this.arrowGraphic.drawRegularPolygon) {
-      this.arrowGraphic.drawRegularPolygon(
-        -10,
-        0,
-        10,
-        3,
-        Math.atan2(p2.y - p1.y, p2.x - p1.y)
-      );
+      let roation = Math.PI / 2;
+      const angle = Math.atan2(p1.y - p2.y, p1.x - p2.x);
+      if (angle > Math.PI / 2) {
+        roation = angle - Math.PI / 2;
+      } else if (angle <= Math.PI / 2 && angle >= 0) {
+        roation = Math.PI / 2 - angle;
+      } else {
+        roation = angle - Math.PI / 2;
+      }
+      this.arrowGraphic.drawRegularPolygon(p2.x, p2.y, 10, 3, roation);
     }
     this.arrowGraphic.endFill();
   }
diff --git a/src/graphics/arrow/ArrowDrawAssistant.ts b/src/graphics/arrow/ArrowDrawAssistant.ts
index 067de7d..5c463b5 100644
--- a/src/graphics/arrow/ArrowDrawAssistant.ts
+++ b/src/graphics/arrow/ArrowDrawAssistant.ts
@@ -70,13 +70,16 @@ export class ArrowDraw extends GraphicDrawAssistant<ArrowTemplate, IArrowData> {
     this.arrowGraphic.clear();
     this.arrowGraphic.beginFill(ArrowConsts.lineColor, 1);
     if (this.arrowGraphic.drawRegularPolygon) {
-      this.arrowGraphic.drawRegularPolygon(
-        -10,
-        0,
-        10,
-        3,
-        Math.atan2(p.y - p1.y, p.x - p1.y)
-      );
+      let roation = Math.PI / 2;
+      const angle = Math.atan2(p1.y - p.y, p1.x - p.x);
+      if (angle > Math.PI / 2) {
+        roation = angle - Math.PI / 2;
+      } else if (angle <= Math.PI / 2 && angle >= 0) {
+        roation = Math.PI / 2 - angle;
+      } else {
+        roation = angle - Math.PI / 2;
+      }
+      this.arrowGraphic.drawRegularPolygon(p.x, p.y, 10, 3, roation);
     }
     this.arrowGraphic.endFill();
   }