增加曲线基类需要实现的方法

src/DatabaseServices/Curve.ts

@@ -29,6 +29,8 @@ export abstract class Curve extends Entity
     GetPointAtDistance(distance: number): Vector3 { return; }
     GetDistAtParam(param: number): number { return; }
     GetDistAtPoint(pt: Vector3): number { return; }
+    GetParamAtPoint(pt: Vector3): number { return; }
+    GetParamAtDist(d: number): number { return; }
     GetFistDeriv(param: number | Vector3): number { return; }
 
     GetSplitCurves(param: number[] | number): Array<Curve> { return; }

src/DatabaseServices/Entity.ts

@@ -1,6 +1,6 @@
 //所有图元的基类
 import * as THREE from 'three';
-import { Matrix4 } from 'three';
+import { Matrix4, Vector3 } from 'three';
 
 import { RenderType } from '../GraphicsSystem/Enum';
 import { Factory } from './CADFactory';
@@ -86,6 +86,7 @@ export class Entity extends CADObject
     {
 
     }
+    IntersectWith(en: Entity, pts: Vector3[]) { }
 
     //#region -------------------------File-------------------------