优化div代码

src/Add-on/Divide.ts

@@ -11,7 +11,8 @@ export class CMD_Divide implements Command
         let enRes = await app.Editor.GetEntity(
             {
                 Msg: "请选择定数等分的对象",
-                KeyWordList: [{ key: "D", msg: "定数等分" }, { key: "S", msg: "定距等分" }]
+                KeyWordList: [{ key: "D", msg: "定数等分" }, { key: "S", msg: "定距等分" }],
+                Filter: { filterFunction: (obj, ent) => { return ent instanceof Curve; } }
             });
         switch (enRes.Status)
         {
@@ -42,29 +43,24 @@ export class CMD_Divide implements Command
     }
     async Divided(enRes: PromptEntityResult)//定数等分
     {
-
-        let numRes = await app.Editor.GetDistance({ Msg: "请输入段数" });
+        let numRes = await app.Editor.GetDistance({ Msg: "请输入段数:", Default: 2 });
         if (numRes.Status != PromptStatus.OK)
             return;
 
         let divCount = numRes.Distance;
-        if (divCount === 0)
+        if (divCount <= 1)
         {
-            app.Editor.Prompt("您不能等分0");
+            app.Editor.Prompt("等分个数必须大于1!");
             return;
         }
         if (enRes.Entity instanceof Curve)
         {
             let cu = enRes.Entity;
-            let len = cu.Length;
-            let divLen = len / numRes.Distance;
-            if (cu.IsClose) //闭合曲线分割点+1
-            {
-                divCount += 1;
-            }
-            for (let i = 0; i < divCount - 1; i++)
+            let divParam = cu.EndParam / divCount;
+            let i = cu.IsClose ? 0 : 1;
+            for (; i < divCount; i++)
             {
-                let pt = cu.GetPointAtDistance(divLen * (i + 1));
+                let pt = cu.GetPointAtParam(divParam * i);
                 let ptEnt = new Point(pt);
                 app.Database.ModelSpace.Append(ptEnt);
             }