utils增加均分直线

src/jlgraphic/utils/GraphicUtils.ts

@@ -676,3 +676,20 @@ export function isLineContainOther(
       isPointOnLine(line2.p1, line2.p2, line1.p2))
   );
 }
+
+/** 均分线段, 返回各线段端点 */
+export function splitLineEvenly(
+  p1: IPointData,
+  p2: IPointData,
+  count: number
+): IPointData[][] {
+  const [stepX, stepY] = [(p2.x - p1.x) / count, (p2.y - p1.y) / count];
+  return Array(count)
+    .fill(1)
+    .map((_, i) => {
+      return [
+        { x: p1.x + stepX * i, y: p1.y + stepY * i },
+        { x: p1.x + stepX * (i + 1), y: p1.y + stepY * (i + 1) },
+      ];
+    });
+}