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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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281
samples/ios/UIKitSample/UIKitSample/GLViewController.mm
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281
samples/ios/UIKitSample/UIKitSample/GLViewController.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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#import <Foundation/Foundation.h>
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#import "GLViewController.h"
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#import "GLView.h"
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@implementation GLViewController
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// =======================================================================
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// function : init
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// purpose :
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// =======================================================================
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- (id) init
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{
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self = [super init];
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if (self) {
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myOcctViewer = new OcctViewer();
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}
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return self;
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}
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// =======================================================================
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// function : Draw
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// purpose :
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// =======================================================================
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- (void) Draw
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{
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}
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// =======================================================================
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// function : Setup
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// purpose :
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// =======================================================================
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- (void) Setup {
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if (!myOcctViewer->InitViewer(self.view)) {
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NSLog(@"Failed to init viewer");
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}
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else {
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[self importScrew:nullptr];
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}
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}
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// =======================================================================
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// function : loadView
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// purpose :
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// =======================================================================
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- (void) loadView
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{
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GLView* aGLView = [[GLView alloc] init];
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aGLView->myController = self;
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self.view = aGLView;
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}
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// =======================================================================
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// function : touchesBegan
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// purpose :
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// =======================================================================
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- (void)touchesBegan:(NSSet *)theTouches withEvent:(UIEvent *)theEvent
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{
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[super touchesBegan:theTouches withEvent:theEvent];
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UITouch *aTouch = [theTouches anyObject];
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if (aTouch != NULL) {
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CGPoint aTouchPoint = [aTouch locationInView:self.view];
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myOcctViewer->StartRotation((int)aTouchPoint.x, (int)aTouchPoint.y);
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}
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}
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// =======================================================================
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// function : touchesMoved
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// purpose :
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// =======================================================================
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- (void)touchesMoved:(NSSet *)theTouches withEvent:(UIEvent *)theEvent
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{
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[super touchesMoved:theTouches withEvent:theEvent];
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UITouch *aTouch = [theTouches anyObject];
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if (aTouch != NULL) {
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CGPoint aTouchPoint = [aTouch locationInView:self.view];
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myOcctViewer->Rotation((int)aTouchPoint.x, (int)aTouchPoint.y);
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}
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return;
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}
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// =======================================================================
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// function : viewDidLoad
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// purpose :
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// =======================================================================
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-(void)viewDidLoad
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{
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// add zoom recognizer
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UIPinchGestureRecognizer *aZoomRecognizer = [[UIPinchGestureRecognizer alloc]
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initWithTarget:self
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action:@selector(zoomHandler:)];
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[[self view] addGestureRecognizer:aZoomRecognizer];
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// add pan recognizer
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UIPanGestureRecognizer *aPanRecognizer = [[UIPanGestureRecognizer alloc]
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initWithTarget:self
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action:@selector(panHandler:)];
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aPanRecognizer.maximumNumberOfTouches = 2;
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aPanRecognizer.minimumNumberOfTouches = 2;
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[[self view] addGestureRecognizer:aPanRecognizer];
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UITapGestureRecognizer *aTapRecognizer = [[UITapGestureRecognizer alloc]
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initWithTarget:self
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action:@selector(tapHandler:)];
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[[self view] addGestureRecognizer:aTapRecognizer];
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// add import buttons
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UIBarButtonItem *importScrewBtn = [[UIBarButtonItem alloc]
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initWithTitle:@"Sample 1"
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style:UIBarButtonItemStylePlain
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target:self
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action:@selector(importScrew:)];
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UIBarButtonItem *importLinkrodsBtn = [[UIBarButtonItem alloc]
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initWithTitle:@"Sample 2"
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style:UIBarButtonItemStylePlain
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target:self
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action:@selector(importLinkrods:)];
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UIBarButtonItem *displayAboutDlgBtn = [[UIBarButtonItem alloc]
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initWithTitle:@"About"
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style:UIBarButtonItemStylePlain
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target:self
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action:@selector(displayAboutDlg:)];
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[self.navigationItem setLeftBarButtonItems:[NSArray arrayWithObjects:importScrewBtn, importLinkrodsBtn, nil]];
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[self.navigationItem setRightBarButtonItem: displayAboutDlgBtn];
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}
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// =======================================================================
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// function : zoomHandler
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// purpose :
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// =======================================================================
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- (void)zoomHandler:(UIPinchGestureRecognizer *)pinchRecognizer
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{
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if ([pinchRecognizer numberOfTouches] > 1)
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{
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UIGestureRecognizerState aState = [pinchRecognizer state];
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if (aState == UIGestureRecognizerStateBegan)
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{
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myFirstTouch[0] = [pinchRecognizer locationOfTouch:0 inView:self.view];
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myFirstTouch[1] = [pinchRecognizer locationOfTouch:1 inView:self.view];
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}
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else if (aState == UIGestureRecognizerStateChanged) {
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CGPoint aLastTouch[2] = {
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[pinchRecognizer locationOfTouch:0 inView:self.view],
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[pinchRecognizer locationOfTouch:1 inView:self.view]
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};
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double aPinchCenterXStart = ( myFirstTouch[0].x + myFirstTouch[1].x ) / 2.0;
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double aPinchCenterYStart = ( myFirstTouch[0].y + myFirstTouch[1].y ) / 2.0;
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double aStartDist = Sqrt( ( myFirstTouch[0].x - myFirstTouch[1].x ) * ( myFirstTouch[0].x - myFirstTouch[1].x ) +
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( myFirstTouch[0].y - myFirstTouch[1].y ) * ( myFirstTouch[0].y - myFirstTouch[1].y ) );
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double anEndDist = Sqrt( ( aLastTouch[0].x - aLastTouch[1].x ) * ( aLastTouch[0].x - aLastTouch[1].x ) +
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( aLastTouch[0].y - aLastTouch[1].y ) * ( aLastTouch[0].y - aLastTouch[1].y ) );
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double aDeltaDist = anEndDist - aStartDist;
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myOcctViewer->Zoom(aPinchCenterXStart, aPinchCenterYStart, aDeltaDist);
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myFirstTouch[0] = aLastTouch[0];
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myFirstTouch[1] = aLastTouch[1];
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}
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}
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}
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// =======================================================================
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// function : panHandler
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// purpose :
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// =======================================================================
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- (void)panHandler:(UIPanGestureRecognizer *)panRecognizer
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{
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if ([panRecognizer numberOfTouches] > 1)
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{
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UIGestureRecognizerState aState = [panRecognizer state];
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if (aState == UIGestureRecognizerStateBegan)
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{
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myFirstTouch[0] = [panRecognizer locationOfTouch:0 inView:self.view];
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myFirstTouch[1] = [panRecognizer locationOfTouch:1 inView:self.view];
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}
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else if (aState == UIGestureRecognizerStateChanged) {
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CGPoint aLastTouch[2] = {
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[panRecognizer locationOfTouch:0 inView:self.view],
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[panRecognizer locationOfTouch:1 inView:self.view]
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};
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double aPinchCenterXStart = ( myFirstTouch[0].x + myFirstTouch[1].x ) / 2.0;
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double aPinchCenterYStart = ( myFirstTouch[0].y + myFirstTouch[1].y ) / 2.0;
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double aPinchCenterXEnd = ( aLastTouch[0].x + aLastTouch[1].x ) / 2.0;
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double aPinchCenterYEnd = ( aLastTouch[0].y + aLastTouch[1].y ) / 2.0;
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double aPinchCenterXDev = aPinchCenterXEnd - aPinchCenterXStart;
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double aPinchCenterYDev = aPinchCenterYEnd - aPinchCenterYStart;
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myOcctViewer->Pan((int)aPinchCenterXDev, (int)-aPinchCenterYDev);
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}
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}
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}
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// =======================================================================
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// function : tapHandler
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// purpose :
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// =======================================================================
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- (void)tapHandler:(UITapGestureRecognizer *)tapRecognizer
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{
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CGPoint aTapPoint = [tapRecognizer locationInView:self.view];
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myOcctViewer->Select(aTapPoint.x, aTapPoint.y);
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}
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// =======================================================================
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// function : importScrew
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// purpose :
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// =======================================================================
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- (void)importScrew:(UIBarButtonItem *)theSender
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{
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NSString* aNsPath = [[NSBundle mainBundle] pathForResource:@"screw"
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ofType:@"step"];
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std::string aPath = std::string([aNsPath UTF8String]);
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myOcctViewer->ImportSTEP(aPath);
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myOcctViewer->FitAll();
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}
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// =======================================================================
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// function : importLinkrods
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// purpose :
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// =======================================================================
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- (void)importLinkrods:(UIBarButtonItem *)theSender
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{
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NSString* aNsPath = [[NSBundle mainBundle] pathForResource:@"linkrods"
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ofType:@"step"];
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std::string aPath = std::string([aNsPath UTF8String]);
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myOcctViewer->ImportSTEP(aPath);
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myOcctViewer->FitAll();
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}
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// =======================================================================
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// function : displayAboutDlg
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// purpose :
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// =======================================================================
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- (void)displayAboutDlg:(UIBarButtonItem *)theSender
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{
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UIAlertController* anAbout = [UIAlertController alertControllerWithTitle:@"About"
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message:@"UIKit based application for tutorial to Open CASCADE Technology.\n\n"
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@"Copyright (c) 2017 OPEN CASCADE SAS"
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preferredStyle:UIAlertControllerStyleAlert];
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UIAlertAction* aDefaultAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault
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handler:^(UIAlertAction * action) {}];
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[anAbout addAction:aDefaultAction];
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[self presentViewController:anAbout animated:YES completion:nil];
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}
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@end
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