加入绘图接口.

src/DatabaseServices/FileSystem.ts

@@ -1,5 +1,9 @@
+import { Geometry, Object3D, Vector3 } from 'three';
+import * as THREE from 'three';
+
 import { ArrayRemove } from '../../src/Common/Utils';
-import { Vector3, Line3 } from 'three';
+import { RenderType } from '../GraphicsSystem/Enum';
+
 /*
 关于webCAD 文件系统的原型.
 包括了对象的保存,撤销,还原.
@@ -1000,6 +1004,15 @@ export class BlockTableRecord extends ObjectCollection<Entity>
 @Factory
 export class Entity extends CADObject
 {
+    protected m_DrawEntity = new Map<RenderType, Object3D>();
+    //绘制一个threeJs对象.
+    Draw(renderType: RenderType = RenderType.Wireframe): Object3D
+    {
+        if (this.m_DrawEntity && this.m_DrawEntity.has(renderType))
+        {
+            return this.m_DrawEntity.get(renderType);
+        }
+    }
 }
 
 //直线对象
@@ -1015,7 +1028,19 @@ export class Line extends Entity
         this.endPoint = new Vector3(0, 0, 0);
     }
 
-    //-----------------------------File-----------------------------
+    Draw(renderType: RenderType): Object3D
+    {
+        let obj = super.Draw(renderType);
+        if (obj) return obj;
+
+        let geo = new Geometry();
+        geo.vertices.push(this.StartPoint, this.EndPoint);
+        obj = new THREE.Line(geo);
+        this.m_DrawEntity.set(renderType, obj);
+        return obj;
+    }
+
+    //#region -----------------------------File-----------------------------
     //对象应该实现dataIn和DataOut的方法,为了对象的序列化和反序列化
 
     //对象从文件中读取数据,初始化自身
@@ -1038,9 +1063,9 @@ export class Line extends Entity
     {
         super.ApplyPartialUndo(data);
     }
-    //-----------------------------File End-----------------------------
-
+    //#endregion-----------------------------File End-----------------------------
 
+    //#region 属性
     set StartPoint(v: Vector3)
     {
         this.WriteAllObjectRecord();
@@ -1061,4 +1086,5 @@ export class Line extends Entity
         this.endPoint.copy(v);
     }
 
+    //#endregion
 }