From c463a58bcf53e43de7e5f16a177f7622f792915e Mon Sep 17 00:00:00 2001
From: ChenX <maple6@vip.qq.com>
Date: Tue, 3 Nov 2020 11:15:45 +0800
Subject: [PATCH] =?UTF-8?q?=E5=8A=9F=E8=83=BD:=E6=9E=84=E9=80=A0=E7=BA=BF,?=
 =?UTF-8?q?=E5=91=BD=E4=BB=A4XLINE?=
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---
 src/Add-on/DrawLine.ts        | 37 +++++++++++++++++++++++++++++++++++
 src/Common/CommandNames.ts    |  1 +
 src/Editor/CommandRegister.ts |  4 +++-
 3 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/src/Add-on/DrawLine.ts b/src/Add-on/DrawLine.ts
index ecf99f503..34c4de672 100644
--- a/src/Add-on/DrawLine.ts
+++ b/src/Add-on/DrawLine.ts
@@ -8,6 +8,7 @@ import { JigUtils } from '../Editor/JigUtils';
 import { ObjectSnapMode } from '../Editor/ObjectSnapMode';
 import { PromptStatus } from '../Editor/PromptResult';
 import { SelectPick } from '../Editor/SelectPick';
+import { equalv3, ZeroVec } from '../Geometry/GeUtils';
 
 export class DrawLine implements Command
 {
@@ -107,3 +108,39 @@ export class DrawLine implements Command
         }
     }
 }
+
+export class Command_DrawXLine implements Command
+{
+    async exec()
+    {
+        let ptRes = await app.Editor.GetPoint({ Msg: "请输入第一个点:" });
+        if (ptRes.Status !== PromptStatus.OK)
+            return;
+
+        let p1 = ptRes.Point;
+        let line = new Line();
+        JigUtils.Draw(line);
+
+        const UpdateLine = (p2: Vector3) =>
+        {
+            let normal = p2.clone().sub(p1);
+            if (equalv3(normal, ZeroVec, 1e-2)) return;
+
+            normal.normalize().multiplyScalar(4000);
+            let p3 = p1.clone().add(normal);
+            let p4 = p1.clone().sub(normal);
+            line.StartPoint = p3;
+            line.EndPoint = p4;
+        };
+
+        let pt2Res = await app.Editor.GetPoint({
+            BasePoint: p1,
+            Msg: "输入方向:", Callback: UpdateLine
+        });
+        if (pt2Res.Status !== PromptStatus.OK)
+            return;
+
+        UpdateLine(pt2Res.Point);
+        app.Database.ModelSpace.Append(line);
+    }
+}
diff --git a/src/Common/CommandNames.ts b/src/Common/CommandNames.ts
index 5e2435bba..8b356632f 100644
--- a/src/Common/CommandNames.ts
+++ b/src/Common/CommandNames.ts
@@ -6,6 +6,7 @@ export enum CommandNames
     DXFImport = "DXF",
     Insert = "INSERT",
     Line = "LINE",
+    XLine = "XLINE",
     Undo = "UNDO",
     Redo = "REDO",
     RECTANG = "RECTANG",
diff --git a/src/Editor/CommandRegister.ts b/src/Editor/CommandRegister.ts
index 5169cb54b..dba4a8ab3 100644
--- a/src/Editor/CommandRegister.ts
+++ b/src/Editor/CommandRegister.ts
@@ -69,7 +69,7 @@ import { DrawGripStretch } from "../Add-on/DrawGripStretch";
 import { DrawPointLight, DrawPointLight2 } from "../Add-on/DrawLight/DrawPointLight";
 import { DrawRectAreaLight } from "../Add-on/DrawLight/DrawRectAreaLight";
 import { DrawSpotLight, DrawSpotLight2 } from "../Add-on/DrawLight/DrawSpotLight";
-import { DrawLine } from "../Add-on/DrawLine";
+import { Command_DrawXLine, DrawLine } from "../Add-on/DrawLine";
 import { CMD_DrawPoint } from "../Add-on/DrawPoint";
 import { DrawPolyline } from "../Add-on/DrawPolyline";
 import { DrawRect } from "../Add-on/DrawRect";
@@ -223,6 +223,8 @@ export function registerCommand()
     commandMachine.RegisterCommand(CommandNames.Insert, new Command_Insert());
 
     commandMachine.RegisterCommand(CommandNames.Line, new DrawLine());
+    commandMachine.RegisterCommand(CommandNames.XLine, new Command_DrawXLine());
+
     commandMachine.RegisterCommand(CommandNames.Undo, new Undo());
     commandMachine.RegisterCommand(CommandNames.Redo, new Redo());
     commandMachine.RegisterCommand("ze", new ZoomE());