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0028148: Samples - add 3D Viewer sample for iOS platform
Sample that uses UIKit has been added. - Import of STEP files is provided - Zoom, Rotate, Pan actions are provided - Selection of solids is supported
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bugmaster
396
samples/ios/UIKitSample/UIKitSample/OcctViewer.mm
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396
samples/ios/UIKitSample/UIKitSample/OcctViewer.mm
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// Copyright (c) 2017 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include "OcctViewer.h"
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#include "OcctDocument.h"
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#include <AIS_ConnectedInteractive.hxx>
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#include <AIS_Shape.hxx>
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#include <Aspect_DisplayConnection.hxx>
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#include <BRep_Builder.hxx>
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#include <BRepMesh_IncrementalMesh.hxx>
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#include <BRepTools.hxx>
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#include <Cocoa_Window.hxx>
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#include <Message.hxx>
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#include <Message_Messenger.hxx>
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#include <OpenGl_GraphicDriver.hxx>
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#include <Prs3d.hxx>
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#include <Prs3d_Drawer.hxx>
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#include <STEPControl_Reader.hxx>
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#include <STEPCAFControl_Reader.hxx>
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#include <TDF_Tool.hxx>
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#include <TDF_ChildIterator.hxx>
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#include <Transfer_TransientProcess.hxx>
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#include <XSControl_TransferReader.hxx>
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#include <XCAFDoc_DocumentTool.hxx>
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// =======================================================================
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// function : OcctViewer
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// purpose :
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// =======================================================================
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OcctViewer::OcctViewer()
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{
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myDoc = new OcctDocument();
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}
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// =======================================================================
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// function : ~OcctViewer
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// purpose :
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// =======================================================================
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OcctViewer::~OcctViewer()
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{
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//
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}
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// =======================================================================
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// function : release
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// purpose :
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// =======================================================================
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void OcctViewer::release()
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{
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myContext.Nullify();
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if (!myView.IsNull())
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{
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myView->Remove();
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}
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myView.Nullify();
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myViewer.Nullify();
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myDoc.Nullify();
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}
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// =======================================================================
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// function : InitViewer
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// purpose :
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// =======================================================================
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bool OcctViewer::InitViewer (UIView* theWin)
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{
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EAGLContext* aRendCtx = [EAGLContext currentContext];
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if (theWin == NULL || aRendCtx == NULL)
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{
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NSLog(@"Error: No active EAGL context!");
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release();
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return false;
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}
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if (!myView.IsNull())
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{
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myView->MustBeResized();
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myView->Invalidate();
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}
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else
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{
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Handle(Aspect_DisplayConnection) aDisplayConnection = new Aspect_DisplayConnection();
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Handle(Graphic3d_GraphicDriver) aGraphicDriver = new OpenGl_GraphicDriver(aDisplayConnection);
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// Create Viewer
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myViewer = new V3d_Viewer(aGraphicDriver);
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myViewer->SetDefaultLights();
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myViewer->SetLightOn();
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// Create AIS context
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myContext = new AIS_InteractiveContext(myViewer);
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myContext->SetDisplayMode((int)AIS_DisplayMode::AIS_Shaded, false);
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myView = myViewer->CreateView();
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myView->TriedronDisplay (Aspect_TOTP_LEFT_LOWER, Quantity_NOC_WHITE, 0.20, V3d_ZBUFFER);
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Handle(Cocoa_Window) aCocoaWindow = new Cocoa_Window(theWin);
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myView->SetWindow(aCocoaWindow, aRendCtx);
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if (!aCocoaWindow->IsMapped())
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{
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aCocoaWindow->Map();
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}
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myView->Redraw();
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myView->MustBeResized();
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}
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return true;
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}
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// =======================================================================
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// function : FitAll
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// purpose :
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// =======================================================================
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void OcctViewer::FitAll()
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{
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if (!myView.IsNull())
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{
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myView->FitAll();
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myView->ZFitAll();
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}
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}
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// =======================================================================
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// function : StartRotation
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// purpose :
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// =======================================================================
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void OcctViewer::StartRotation(int theX, int theY)
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{
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if (!myView.IsNull())
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{
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myView->StartRotation(theX, theY);
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}
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}
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// =======================================================================
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// function : Rotation
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// purpose :
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// =======================================================================
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void OcctViewer::Rotation(int theX, int theY)
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{
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if (!myView.IsNull())
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{
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myView->Rotation(theX, theY);
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}
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}
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// =======================================================================
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// function : Pan
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// purpose :
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// =======================================================================
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void OcctViewer::Pan(int theX, int theY)
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{
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if (!myView.IsNull())
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{
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myView->Pan(theX, theY, 1, Standard_False);
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}
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}
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// =======================================================================
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// function : Zoom
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// purpose :
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// =======================================================================
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void OcctViewer::Zoom(int theX, int theY, double theDelta)
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{
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if (!myView.IsNull())
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{
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if (theX >=0 && theY >=0)
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{
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myView->StartZoomAtPoint(theX, theY);
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myView->ZoomAtPoint(0, 0, (int) theDelta, (int) theDelta);
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}
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else
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{
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double aCoeff = Abs(theDelta) / 100.0 + 1.0;
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aCoeff = theDelta > 0.0 ? aCoeff : 1.0 / aCoeff;
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myView->SetZoom(aCoeff, Standard_True);
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}
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}
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}
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// =======================================================================
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// function : Select
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// purpose :
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// =======================================================================
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void OcctViewer::Select(int theX, int theY)
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{
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if (!myContext.IsNull())
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{
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myContext->ClearSelected(Standard_False);
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myContext->MoveTo(theX, theY, myView, Standard_False);
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myContext->Select(Standard_False);
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}
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}
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// =======================================================================
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// function : ImportSTEP
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// purpose :
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// =======================================================================
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bool OcctViewer::ImportSTEP(std::string theFilename)
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{
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// create a new document
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myDoc->InitDoc();
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STEPCAFControl_Reader aReader;
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Handle(XSControl_WorkSession) aSession = aReader.Reader().WS();
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try {
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if (!aReader.ReadFile (theFilename.c_str()))
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{
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clearSession (aSession);
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return false;
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}
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if (!aReader.Transfer (myDoc->ChangeDocument()))
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{
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clearSession (aSession);
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return false;
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}
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clearSession(aSession);
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} catch (Standard_Failure theFailure) {
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Message::DefaultMessenger()->Send (TCollection_AsciiString ("Exception raised during STEP import\n[")
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+ theFailure.GetMessageString() + "]\n" + theFilename.c_str(), Message_Fail);
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return false;
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}
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Handle(XCAFDoc_ShapeTool) aShapeTool = XCAFDoc_DocumentTool::ShapeTool (myDoc->Document()->Main());
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Handle(XCAFDoc_ColorTool) aColorTool = XCAFDoc_DocumentTool::ColorTool (myDoc->Document()->Main());
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TDF_LabelSequence aLabels;
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aShapeTool->GetFreeShapes (aLabels);
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// perform meshing explicitly
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TopoDS_Compound aCompound;
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BRep_Builder aBuildTool;
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aBuildTool.MakeCompound (aCompound);
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for (Standard_Integer aLabIter = 1; aLabIter <= aLabels.Length(); ++aLabIter)
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{
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TopoDS_Shape aShape;
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const TDF_Label& aLabel = aLabels.Value (aLabIter);
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if (XCAFDoc_ShapeTool::GetShape (aLabel, aShape))
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{
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aBuildTool.Add (aCompound, aShape);
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}
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}
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Handle(Prs3d_Drawer) aDrawer = myContext->DefaultDrawer();
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Standard_Real aDeflection = Prs3d::GetDeflection (aCompound, aDrawer);
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if (!BRepTools::Triangulation (aCompound, aDeflection))
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{
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BRepMesh_IncrementalMesh anAlgo;
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anAlgo.ChangeParameters().Deflection = aDeflection;
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anAlgo.ChangeParameters().Angle = aDrawer->HLRAngle();
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anAlgo.ChangeParameters().InParallel = Standard_True;
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anAlgo.SetShape (aCompound);
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anAlgo.Perform();
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}
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// clear presentations
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clearContext();
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// create presentations
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MapOfPrsForShapes aMapOfShapes;
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XCAFPrs_Style aDefStyle;
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aDefStyle.SetColorSurf (Quantity_NOC_GRAY65);
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aDefStyle.SetColorCurv (Quantity_NOC_GRAY65);
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for (Standard_Integer aLabIter = 1; aLabIter <= aLabels.Length(); ++aLabIter)
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{
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const TDF_Label& aLabel = aLabels.Value (aLabIter);
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displayWithChildren (*aShapeTool, *aColorTool, aLabel, TopLoc_Location(), aDefStyle, "", aMapOfShapes);
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}
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return true;
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}
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// =======================================================================
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// function : displayWithChildren
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// purpose :
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// =======================================================================
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void OcctViewer::displayWithChildren (XCAFDoc_ShapeTool& theShapeTool,
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XCAFDoc_ColorTool& theColorTool,
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const TDF_Label& theLabel,
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const TopLoc_Location& theParentTrsf,
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const XCAFPrs_Style& theParentStyle,
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const TCollection_AsciiString& theParentId,
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MapOfPrsForShapes& theMapOfShapes)
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{
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TDF_Label aRefLabel = theLabel;
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if (theShapeTool.IsReference (theLabel))
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{
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theShapeTool.GetReferredShape (theLabel, aRefLabel);
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}
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TCollection_AsciiString anEntry;
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TDF_Tool::Entry (theLabel, anEntry);
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if (!theParentId.IsEmpty())
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{
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anEntry = theParentId + "\n" + anEntry;
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}
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anEntry += ".";
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if (!theShapeTool.IsAssembly (aRefLabel))
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{
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Handle(AIS_InteractiveObject) anAis;
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if (!theMapOfShapes.Find (aRefLabel, anAis))
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{
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anAis = new CafShapePrs (aRefLabel, theParentStyle, Graphic3d_NOM_SHINY_PLASTIC);
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theMapOfShapes.Bind (aRefLabel, anAis);
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}
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Handle(TCollection_HAsciiString) anId = new TCollection_HAsciiString (anEntry);
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Handle(AIS_ConnectedInteractive) aConnected = new AIS_ConnectedInteractive();
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aConnected->Connect (anAis, theParentTrsf.Transformation());
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aConnected->SetOwner (anId);
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aConnected->SetLocalTransformation (theParentTrsf.Transformation());
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aConnected->SetHilightMode(1);
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myContext->Display (aConnected, Standard_False);
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return;
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}
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XCAFPrs_Style aDefStyle = theParentStyle;
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Quantity_Color aColor;
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if (theColorTool.GetColor (aRefLabel, XCAFDoc_ColorGen, aColor))
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{
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aDefStyle.SetColorCurv (aColor);
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aDefStyle.SetColorSurf (aColor);
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}
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if (theColorTool.GetColor (aRefLabel, XCAFDoc_ColorSurf, aColor))
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{
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aDefStyle.SetColorSurf (aColor);
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}
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if (theColorTool.GetColor (aRefLabel, XCAFDoc_ColorCurv, aColor))
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{
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aDefStyle.SetColorCurv (aColor);
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}
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for (TDF_ChildIterator childIter (aRefLabel); childIter.More(); childIter.Next())
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{
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TDF_Label aLabel = childIter.Value();
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if (!aLabel.IsNull()
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&& (aLabel.HasAttribute() || aLabel.HasChild()))
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{
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TopLoc_Location aTrsf = theParentTrsf * theShapeTool.GetLocation (aLabel);
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displayWithChildren (theShapeTool, theColorTool, aLabel, aTrsf, aDefStyle, anEntry, theMapOfShapes);
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}
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}
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}
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// =======================================================================
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// function : clearSession
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// purpose :
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// =======================================================================
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void OcctViewer::clearSession (const Handle(XSControl_WorkSession)& theSession)
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{
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if (theSession.IsNull())
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{
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return;
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}
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Handle(Transfer_TransientProcess) aMapReader = theSession->TransferReader()->TransientProcess();
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if (!aMapReader.IsNull())
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{
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aMapReader->Clear();
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}
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Handle(XSControl_TransferReader) aTransferReader = theSession->TransferReader();
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if (!aTransferReader.IsNull())
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{
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aTransferReader->Clear(1);
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}
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}
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// =======================================================================
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// function : clearContext
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// purpose :
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// =======================================================================
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void OcctViewer::clearContext ()
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{
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if (!myContext.IsNull())
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{
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myContext->ClearSelected(Standard_False);
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myContext->RemoveAll(Standard_False);
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}
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}
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