fix(snapline): snapline cannot show when zoomed

Author: HawtinZeng

packages/core/src/model/SnaplineModel.ts

@@ -95,19 +95,21 @@ export class SnaplineModel {
       // 排除当前节点
       if (item.id !== draggingNode.id) {
         const itemData = getNodeBBox(item)
+
         // 如果节点的最大最小Y轴坐标与节点的最大最小Y轴坐标相等，展示水平线
+        const epsino = 1
         if (
-          itemData.minY === draggingData?.minY ||
-          itemData.maxY === draggingData?.minY
+          equal(itemData.minY, draggingData?.minY, epsino) ||
+          equal(itemData.maxY, draggingData?.minY, epsino)
         ) {
           // 找到则停止循环。减少不必要的遍历
           isShowHorizontal = true
           horizontalY = draggingData.minY
           break
         }
         if (
-          itemData.minY === draggingData?.maxY ||
-          itemData.maxY === draggingData?.maxY
+          equal(itemData.minY, draggingData?.maxY, epsino) ||
+          equal(itemData.maxY, draggingData?.maxY, epsino)
         ) {
           isShowHorizontal = true
           horizontalY = draggingData.maxY
@@ -204,6 +206,7 @@ export class SnaplineModel {
         snaplineInfo.position.x = verticalSnapline.position.x
       }
     }
+
     return snaplineInfo
   }
 
@@ -235,4 +238,12 @@ export class SnaplineModel {
   }
 }
 
+function equal(num1: number, num2: number, epsino: number) {
+  if (Math.abs(num1 - num2) <= epsino) {
+    return true
+  } else {
+    return false
+  }
+}
+
 export default SnaplineModel