如何使用viewport.getucs？
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如何使用viewport.getucs？
getucs方法的格式为 public void getucs( point3d origin, vector3d x, vector3d y ); 我的c#： promptentityoptions prentityops = new promptentityoptions("\nselect viewport:"); prentityops.setrejectmessage("\nviewport accepted only."); prentityops.addallowedclass(typeof(viewport), true); promptentityresult prentityresult = ed.getentity(prentityops); if (prentityresult.status == promptstatus.ok) { using (transaction trans = db.transactionmanager.starttransaction()) { viewport vp = (viewport)trans.getobject(prentityresult.objectid, openmode.forread); point3d ucspt = new point3d(); vector3d ucsx, ucsy = new vector3d(); vp.getucs(ucspt,ucsx,ucsy); ed.writemessage("ucs origin: {0}\n", ucspt.tostring()); ed.writemessage("ucs x: {0}\n", ucsx.tostring()); ed.writemessage("ucs y: {0}\n", ucsy.tostring()); } } 发现似乎总返回初始值。请问getucs这样用到底对不对，正确应返回何值？另外，只要加入ed.writemessage("plotstylesheet: {0}\n", vp.plotstylesheet);，就会运行出错，为什么？