From dd429849dc2ba010b293f58f4980043eba4a6ec6 Mon Sep 17 00:00:00 2001
From: fan <fanyuhong@joylink.club>
Date: Thu, 13 Jul 2023 16:10:09 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0=E5=B7=A5=E5=85=B7=E6=96=B9?=
 =?UTF-8?q?=E6=B3=95?=
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---
 src/jlgraphic/utils/GraphicUtils.ts | 31 +++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/src/jlgraphic/utils/GraphicUtils.ts b/src/jlgraphic/utils/GraphicUtils.ts
index 362935e..9023ff9 100644
--- a/src/jlgraphic/utils/GraphicUtils.ts
+++ b/src/jlgraphic/utils/GraphicUtils.ts
@@ -517,3 +517,34 @@ export function angleOfIncludedAngle(
   }
   return angle;
 }
+/**
+ * 判断点是否在线段上
+ * @param point 判断点
+ * @param start 线段起点
+ * @param end 线段终点
+ * @returns
+ */
+export function isPointOnLineSegment(
+  point: IPointData,
+  start: IPointData,
+  end: IPointData
+) {
+  // 计算向量AB和向量AC的叉积
+  const crossProduct =
+    (end.y - start.y) * (point.x - start.x) -
+    (end.x - start.x) * (point.y - start.y);
+
+  // 如果叉积为0，则点在直线上
+  if (crossProduct === 0) {
+    // 接下来判断点是否在线段上
+    if (
+      point.x >= Math.min(start.x, end.x) &&
+      point.x <= Math.max(start.x, end.x) &&
+      point.y >= Math.min(start.y, end.y) &&
+      point.y <= Math.max(start.y, end.y)
+    ) {
+      return true; // 点在线段上
+    }
+  }
+  return false; // 点不在线段上
+}