开发:优化绘制线时获取捕捉实体

src/Add-on/DrawLine.ts

@@ -3,14 +3,12 @@ import hotkeys from 'hotkeys-js-ext';
 import { Vector3 } from 'three';
 import { app } from '../ApplicationServices/Application';
 import { CircleInternalTangentLines, CircleOuterTangentLines } from '../Common/CurveUtils';
-import { Arc } from '../DatabaseServices/Entity/Arc';
 import { Circle } from '../DatabaseServices/Entity/Circle';
 import { Line } from '../DatabaseServices/Entity/Line';
 import { Command } from '../Editor/CommandMachine';
 import { JigUtils } from '../Editor/JigUtils';
 import { ObjectSnapMode } from '../Editor/ObjectSnapMode';
 import { PromptPointResult, PromptStatus } from '../Editor/PromptResult';
-import { SelectPick } from '../Editor/SelectPick';
 import { UCSUtils } from '../Editor/UCSRAII';
 import { userConfig } from '../Editor/UserConfig';
 import { ZeroVec, equalv3 } from '../Geometry/GeUtils';
@@ -85,22 +83,10 @@ export class DrawLine implements Command
         UCSUtils.SetUCSFromPointRes(ptRes);
 
         let ptLast = ptRes.Point;
-        let firstSnapModeIsTan = ptRes.SnapMode === ObjectSnapMode.Tan;
+        let firstSnapModeIsTan = ptRes.SnapMode === ObjectSnapMode.Tan && ptRes.SnapEntity;
+        let firstTangeCircle = ptRes.SnapEntity as Circle;
         let secondSnapModelIsTan = false;
 
-        let firstTangeCircle: Circle | Arc;
-        if (firstSnapModeIsTan)
-        {
-            let pick = new SelectPick(app.Viewer, app.Viewer.WorldToScreen(ptRes.Point));
-            pick.Select(app.Viewer.VisibleObjects, { filterTypes: [Circle, Arc] });
-            let cirs = pick.SelectEntityList as Circle[];
-            for (let e of cirs)
-            {
-                if (e.PtOnCurve(ptRes.Point))
-                    firstTangeCircle = e;
-            }
-        }
-
         const TempUndo = () =>
         {
             if (app.Editor.GetPointServices.IsReady)