GLViewer.cpp 76 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
/*
 *	(c) LSIIT, UMR CNRS/UdS
 *	Authors: O. Gnevaux, F. Larue.
 *
 *	See licence.txt for additional information.
 */


#include "GLViewer.h"

#include <fstream>
#include <iostream>
#include <sstream>
#include "InfoBarManager.h"

#include <SelectionManager.h>
#include <SelectionToolBox.h>
#include <SelectionToolDisk.h>
#include <SelectionToolLasso.h>




24
void GLViewer::DisplayableInfo::Initialize( DisplayableInterface *displayable,
25
                                            DisplayableList::iterator priorityPos,
26
27
28
29
30
31
32
33
34
35
36
37
                                            UIParamSet &params )
{
    this->displayable = displayable;
    this->posInPriorityList = priorityPos;

    displayable->initialize( params );

    displayable->transformation( this->userTransform );
    this->packingTransform.setToIdentity();
    this->fullTransform = this->userTransform * this->packingTransform;

    displayable->boundingBox( this->boundingBox );
38

39
40
41
42
    this->selectionMgr.clear();
    displayable->selectionManagers( this->selectionMgr );

    currentSelectionMgr = NULL;
43
44
45
46
47
}




48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
const char* GLViewer::s_PickingVPG =
    "#version 330\n"

    "uniform mat4 projectionMatrix;"
    "uniform mat4 viewMatrix;"

    "in vec3 vertexPosition;"

    "out float depth;"
    "out vec3 vertex;"

    "void main()"
    "{"
    "   depth  = length( (viewMatrix * vec4(vertexPosition,1.0)).xyz );"
    "   vertex = vertexPosition;"

    "   gl_Position = projectionMatrix * viewMatrix * vec4(vertexPosition,1.0);"
    "}";

const char* GLViewer::s_PickingFPG =
    "uniform int u_ObjectId;"

    "in float depth;"
    "in vec3 vertex;"

    "void main()"
    "{"
    "   gl_FragData[0].x = float( u_ObjectId      & 255) / 255.0;"
    "   gl_FragData[0].y = float((u_ObjectId>> 8) & 255) / 255.0;"
    "   gl_FragData[0].z = float((u_ObjectId>>16) & 255) / 255.0;"
    "   gl_FragData[0].w = float((u_ObjectId>>24) & 255) / 255.0;"
    "   gl_FragData[1] = vec4( vertex, depth );"
    "}";


const char* GLViewer::s_ZBufferVPG =
    "#version 330\n"

    "uniform mat4 fullTransformMatrix;"

    "in vec3 vertexPosition;"

    "void main()"
    "{"
    "   gl_Position = fullTransformMatrix * vec4(vertexPosition,1.0);"
    "}";

const char* GLViewer::s_ZBufferFPG =
    "void main()"
    "{"
    "   gl_FragData[0] = vec4( 0.0, 0.0, 0.0, 1.0 );"
    "}";


GLViewer::GLViewer( DisplayDoF dof,
                    QWidget *parent,
Frédéric Larue's avatar
Frédéric Larue committed
104
105
106
107
                    Qt::WindowFlags f ) :
    QOpenGLWidget( parent, f ),
    m_DisplayOptionsLayout( NULL ),
    m_InfoBarManager( NULL )
108
{
109
    initMetricGrids();
110
111
112
113
114
115
116
    init( dof );
}


GLViewer::GLViewer( DisplayDoF dof,
                    const QSurfaceFormat &format,
                    QWidget *parent,
Frédéric Larue's avatar
Frédéric Larue committed
117
118
119
120
                    Qt::WindowFlags f ) :
    QOpenGLWidget( parent, f ),
    m_DisplayOptionsLayout( NULL ),
    m_InfoBarManager( NULL )
121
122
{
	setFormat( format );
123
    initMetricGrids();
124
125
126
127
128
129
    init( dof );
}


GLViewer::~GLViewer()
{
130
    removeAllDisplayables();
131

132
133
134
135
136
137
138
    for( std::vector<SelectionTool*>::iterator tool=m_SelectionTools.begin(); tool!=m_SelectionTools.end(); ++tool )
        delete *tool;

	delete m_InfoBarManager;
}


139
140
141
142
143
144
145
146
147
148
void GLViewer::initMetricGrids()
{
    m_View.metricGrid2D.disableAxis( MetricGrid::ALL );
    m_View.metricGrid2D.disableGrid( MetricGrid::ALL );

    m_View.metricGrid3D.enableAxis( MetricGrid::ALL );
    m_View.metricGrid3D.enableGrid( MetricGrid::ZX );
}


149
150
void GLViewer::init( DisplayDoF dof )
{
151
152
153
    m_BelowCursor = NULL;


154
155
156
    m_MustUpdateFocal            = true;
    m_MustUpdateProjectionMatrix = true;
    m_MustUpdateViewMatrix       = true;
157

158
159
160
161
    m_SpeedFactor = 1.0;
    m_CtrlSpeedFactor = 4.0;
    m_ShiftSpeedFactor = 0.25;

162
    m_View.focusPoint = QVector3D(-1.0f,-1.0f,-1.0f);
163
    setFocusPoint( QVector3D(0.0f,0.0f,0.0f) );
164

165
    m_View.DoF = dof;
166
    QMatrix4x4 rot;
167
    if( dof == DISPLAY_DOF_2D )
168
        rot.setToIdentity();
169
170
    else
    {
171
172
        rot.rotate(  30.0f, 1,0,0 );
        rot.rotate( -30.0f, 0,1,0 );
173
    }
174
175
    setViewRotationMatrix( rot );

176
    m_View.fovY = 0.0f;
177
178
    setFovY( 65.0f );

179
180
181
182
183
    m_ChangeNearPlaneMode = false;
    m_ChangeFarPlaneMode  = false;

    m_View.nearPlaneFactor  = 0.01f;
    m_View.farPlaneFactor   = 5.0f;
184
	m_View.distToFocusPoint = 0.0f;
185
    setDistToFocusPoint( 400.0f );
186

187
188
    m_View.pointSize = 2;
	m_View.isCullingEnabled = false;
189

Frédéric Larue's avatar
Frédéric Larue committed
190
191
192
193
194
    if( !m_InfoBarManager )
    {
        m_InfoBarManager = new InfoBarManager( this );
        m_InfoBarManager->setInfoBar( new InfoBar(), InfoBar::BOTTOM );
    }
195
196
197
198


    // Initialize selection tools.

199
    m_IsSelectionAllowed = true;
200
201
202
203
204
205
206
207
208
209
210
211
212
213
    m_SelectionEnabled = false;

    if( m_SelectionTools.empty() )
    {
        m_SelectionTools.resize( SELECTION_TOOL_END );
        m_SelectionTools[SELECTION_TOOL_BOX  ] = new SelectionToolBox  ( *this, m_SelectionContext );
        m_SelectionTools[SELECTION_TOOL_DISK ] = new SelectionToolDisk ( *this, m_SelectionContext );
        m_SelectionTools[SELECTION_TOOL_LASSO] = new SelectionToolLasso( *this, m_SelectionContext );
    }

    m_SelectionCurrentToolName = SELECTION_TOOL_DISK;
    m_SelectionCurrentTool = m_SelectionTools[ m_SelectionCurrentToolName ];


214
    m_View.lightRotationMatrix.setToIdentity();
215

216
217
218
    m_View.isLightTrackingEnabled = true;
    m_View.isLightingEnabled      = true;
    m_View.isWireframeEnabled     = false;
219
220
221


    m_AnimationsRunningAtPreviousFrame = false;
222
	m_PerformanceCounterEnabled = false;
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244


    // Initialize the layout that will contains options for all active displayables.

    if( !m_DisplayOptionsLayout )
    {
        m_DisplayOptionsLayout = new QVBoxLayout();
        m_DisplayOptionsLayout->setAlignment( Qt::AlignTop );

        QWidget *w = new QWidget( this );
        w->setLayout( m_DisplayOptionsLayout );

        QGridLayout *viewerLayout = new QGridLayout();
        viewerLayout->setRowStretch( 1, 10 );
        viewerLayout->setColumnStretch( 0, 10 );
        viewerLayout->addWidget( w, 0,1 );

        this->setLayout( viewerLayout );
    }
}


245
246
247
248
249
250
251
252
253
254
255
256
void GLViewer::setRenderState( const RenderState& state )
{
    m_View = state;

    m_MustUpdateFocal            = true;
    m_MustUpdateProjectionMatrix = true;
    m_MustUpdateViewMatrix       = true;

    update();
}


257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
void GLViewer::populateDisplayerFactories( DisplayableFactoryInterface *plugin )
{
    const unsigned int NB_ROWS = 3;

    QVector<QString> types;
    plugin->acceptedDataTypes( types );

    for( auto &type : types )
        if( m_Factories.find(type) == m_Factories.end()  &&  (plugin->viewerDoF() & dof()) )
            m_Factories[type] = plugin;
}


void GLViewer::populateDisplayerFactories( QList<DisplayableFactoryInterface*> &plugins )
{
    foreach( DisplayableFactoryInterface *plugin, plugins )
        populateDisplayerFactories( plugin );
}


bool GLViewer::addDisplayable( GenericUIData *m )
{
    // If a displayable already exists for this manageable, remove it before creating a new one.
    removeDisplayable( m );

    // Recovers the displayable factory for the corresponding datatype.
    FactoryMap::iterator factory = m_Factories.find( m->GetTypeString() );
    if( factory == m_Factories.end() )
        return false;

    // Asks the factory to create a displayable of the correct type. It is then
    // initialized and inserted in the list of all displayables.
    DisplayableInterface *displayable = factory->second->newDisplayer( m, this );
    DisplayableInfo *dispInfo = NULL;

    if( displayable )
    {
        makeCurrent();

        if( !m->GetDisplayOptions() )
        {
298
            UIParamSet *params = new UIParamSet( m->GetBaseName(), NULL );
299
300
301
            displayable->declareParameters( *params );

            if( displayable->isAnimated() )
302
                params->Add( new UIParamAnimation() );
303
304
305
306
307

            params->updateChildrenLists( m );

            m->SetDisplayOptions( params );
        }
308

309
310
311
312
313
        connect( m->GetDisplayOptions(), SIGNAL(parameterUpdated(UIParam*)), this, SLOT(update()) );
        connect( m->GetDisplayOptions(), SIGNAL(parameterUpdated(UIParam*)), displayable, SLOT(updateParameter(UIParam*)) );

        if( displayable->isAnimated() )
        {
314
            UIParamAnimation *animCtrl = m->GetDisplayOptions()->GetAnimationCtrl();
315
316
317
318
319
320
321
322
323
324
325
            connect( animCtrl, SIGNAL(animationStartRequired()), displayable, SLOT(startAnimation()) );
            connect( animCtrl, SIGNAL(animationPauseRequired()), displayable, SLOT(pauseAnimation()) );
            connect( animCtrl, SIGNAL(animationStopRequired ()), displayable, SLOT(stopAnimation ()) );
            connect( animCtrl, SIGNAL(animationStepForwardRequired ()), displayable, SLOT(animationStepForward ()) );
            connect( animCtrl, SIGNAL(animationStepBackwardRequired()), displayable, SLOT(animationStepBackward()) );

            connect( displayable, SIGNAL(registerAnimation  (DisplayableInterface*)), this, SLOT(registerAnimation  (DisplayableInterface*)) );
            connect( displayable, SIGNAL(unregisterAnimation(DisplayableInterface*)), this, SLOT(unregisterAnimation(DisplayableInterface*)) );
            connect( displayable, SIGNAL(displayNeedUpdate()), this, SLOT(update()) );
        }

326
327
328
329
330
331
332
333
        DisplayableList &priorityList = m_DisplayablesByPriority[ factory->second->displayPriority() ];

        dispInfo = &m_Displayables[ m ];
        dispInfo->Initialize(
            displayable,
            priorityList.insert( priorityList.end(), dispInfo ),
            *m->GetDisplayOptions()
        );
334

335
        if( !m->GetDisplayOptions()->IsEmpty() )
336
337
338
339
340
        {
            m_DisplayOptionsLayout->addWidget( m->GetDisplayOptions() );
            m->GetDisplayOptions()->show();
        }

341
342
343
344
345
346
347
348
349
350
        if( isSelectionEnabled() )
        {
            for( auto mngr : dispInfo->selectionMgr )
                if( mngr->selectableEntity() == m_SelectionCurrentTool->entityToSelect() )
                {
                    dispInfo->currentSelectionMgr = mngr;
                    mngr->onRecompilingSelectionShader( m_SelectionCurrentTool );
                    break;
                }
        }
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367

        update();
    }


    if( dof() == DISPLAY_DOF_2D  &&  displayable )
    {
        m_AddingOrder.push_back( dispInfo );
        repackDisplayables();
        //frameAll();
    }


	return displayable != NULL;
}


368
369
370
371
372
373
//void GLViewer::setTransform( GenericUIData *m, const QMatrix4x4 &xf )
//{
//    DisplayableMap::iterator d = m_Displayables.find( m );
//    if( d != m_Displayables.end() )
//        d->second.packingTransform = xf;
//}
374
375


376
void GLViewer::updateDisplayable( GenericUIData *m, bool resetSelectionManagers )
377
378
379
380
381
382
383
384
385
386
387
388
{
    DisplayableMap::iterator d = m_Displayables.find( m );
    if( d != m_Displayables.end() )
    {
        // Recovers the info and the factory related to the given manageable.
        DisplayableFactoryInterface *factory = m_Factories[ m->GetTypeString() ];
        DisplayableInfo *dinfo = &d->second;

        // Re-initializes the displayable.
        dinfo->displayable->release( *m->GetDisplayOptions() );
        dinfo->displayable->initialize( *m->GetDisplayOptions() );

389
390
391
392
393
394
395
396
        // Update the displayable bounding box.
        dinfo->displayable->boundingBox( dinfo->boundingBox );

        // Update the displayable transform.
        QMatrix4x4 tr;
        dinfo->displayable->transformation( tr );
        dinfo->SetUserTransform( tr );

397
        // Re-generate the selection managers.
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
		if( resetSelectionManagers )
		{
			dinfo->currentSelectionMgr = NULL;
			for( auto mngr : dinfo->selectionMgr )
				delete mngr;
			dinfo->selectionMgr.clear();
			dinfo->displayable->selectionManagers( dinfo->selectionMgr );

			if( isSelectionEnabled() )
			{
				for( auto mngr : dinfo->selectionMgr )
					if( mngr->selectableEntity() == m_SelectionCurrentTool->entityToSelect() )
					{
						dinfo->currentSelectionMgr = mngr;
						mngr->onRecompilingSelectionShader( m_SelectionCurrentTool );
						break;
					}
			}
		}
417
418
419
420
421
422
423
424
425
426
427

        update();
    }
}


void GLViewer::frameBox( Box3f &box, const QMatrix4x4 *xf )
{
    if( !box.IsNull() )
    {
        double boxHalfDiag = box.Dimensions().length() * 0.5;
428
429
        double depth = ( 2.0*zFar()*zNear() - distToFocusPoint()*(zFar()+zNear()) ) / (zNear()-zFar());
        double projectedRadius = boxHalfDiag * focal() / depth;
430
431
432
433
434
435
436

        if( xf )
            setFocusPoint( xf->map(box.Center()) );
        else
            setFocusPoint( box.Center() );

        if( projectedRadius > 0.000001 )
437
            setDistToFocusPoint( distToFocusPoint() * (width()<height()? projectedRadius*height()/width() : projectedRadius) );
438
439
440
441
442
443
444
445
    }
}


void GLViewer::frameItem( GenericUIData* item )
{
    DisplayableMap::iterator dispInfo = m_Displayables.find( item );
    if( dispInfo != m_Displayables.end() )
446
        frameBox( dispInfo->second.boundingBox, &dispInfo->second.GetTransform() );
447
448
449
}


450
void GLViewer::frameItems( QList<GenericUIData*> &items )
451
452
453
454
455
456
457
{
    Box3f box;

    for( auto m=items.begin(); m!=items.end(); ++m )
    {
        DisplayableMap::iterator dispInfo = m_Displayables.find( *m );
        if( dispInfo != m_Displayables.end() )
458
            if( !dispInfo->second.boundingBox.IsNull() )
459
460
            {
                Box3f::CornerSet objectBoxCorners;
461
                dispInfo->second.boundingBox.Corners( objectBoxCorners );
462
463

                for( auto c=objectBoxCorners.begin(); c!=objectBoxCorners.end(); ++c )
464
                    box.Add( dispInfo->second.GetTransform().map(*c) );
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
            }
    }

    frameBox( box );
}


void GLViewer::frameAll()
{
    if( !m_Displayables.empty() )
    {
        Box3f box;

        for( DisplayableMap::iterator dispInfo=m_Displayables.begin(); dispInfo!=m_Displayables.end(); ++dispInfo )
        {
            Box3f objectBox;
            dispInfo->second.displayable->boundingBox( objectBox );

            if( !objectBox.IsNull() )
            {
                Box3f::CornerSet objectBoxCorners;
                objectBox.Corners( objectBoxCorners );

                for( auto c=objectBoxCorners.begin(); c!=objectBoxCorners.end(); ++c )
489
                    box.Add( dispInfo->second.GetTransform().map(*c) );
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
            }
        }

        frameBox( box );
    }
}




// All displayables are arranged along a grid layout. All grid row have the same height (displayables are scaled so as to fit it)
// but each column has a different width, that corresponds to the width of its largest element. Displayables are horizontaly centered
// in their respective grid cells.
void GLViewer::repackDisplayables()
{
    if( m_AddingOrder.empty() )
        return;


    // Computes the number of columns of the grid.
    int nCols = (int) std::ceil( std::sqrt( (float)m_AddingOrder.size() ) );


    // Recovers the bounding boxes of all items.
    std::vector<Box3f> boxes( m_AddingOrder.size() );

    auto d = m_AddingOrder.begin();
    for( int i=0; i<boxes.size(); ++i, ++d )
        (*d)->displayable->boundingBox( boxes[i] );


    // Initializes the row height by looking at the bounding box height of the first displayable in the list.
    float rowHeight = boxes[0].Dimensions().y();
    float gridSpacing = 0.05f * rowHeight;


    // The width of each column is determined by looking for the largest rescaled width of all the elements it contains.
    std::vector<int> columnWidth( nCols );
    for( int c=0; c<nCols; ++c )
        columnWidth[c] = 0;

    for( int i=0; i<boxes.size(); ++i )
    {
        int c = i % nCols;
        float rescaledWidth = boxes[i].Dimensions().x() * rowHeight / boxes[i].Dimensions().y();
        if( rescaledWidth > columnWidth[c] )
            columnWidth[c] = rescaledWidth;
    }


    // The scaling factor to be applied to each displayable so as to match the grid row height is computed,
    // and the layout arrangement is finally performed by setting up the translation part of each displayable transform.
    float xRowBeginning = (boxes[0].Min().x() + 0.5f*boxes[0].Dimensions().x()) * rowHeight / boxes[0].Dimensions().y() - 0.5f*columnWidth[0];
    float x = xRowBeginning;
    float y = boxes[0].Min().y() * rowHeight / boxes[0].Dimensions().y();

    d = m_AddingOrder.begin();
    for( int i=0, c=0; i<boxes.size(); ++i, ++d )
    {
        float scalingFactor = rowHeight / boxes[i].Dimensions().y();
        float rescaledWidth = boxes[i].Dimensions().x() * scalingFactor;

552
553
554
555
556
557
558
        QMatrix4x4 packTr;
        packTr.setToIdentity();
        packTr(0,0) = scalingFactor;
        packTr(1,1) = scalingFactor;
        packTr(0,3) = x - boxes[i].Min().x()*scalingFactor + 0.5f*(columnWidth[c]-rescaledWidth);
        packTr(1,3) = y - boxes[i].Min().y()*scalingFactor;
        (*d)->SetPackingTransform( packTr );
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588

        x += columnWidth[c] + gridSpacing;

        if( !(c = (c+1) % nCols) )
        {
            x = xRowBeginning;
            y -= rowHeight + gridSpacing;
        }
    }
}


GLViewer::DisplayableMap::iterator GLViewer::removeDisplayable_Internal( DisplayableMap::iterator &dmapIt )
{
    const GenericUIData *item  = dmapIt->first;
    DisplayableInfo     &dinfo = dmapIt->second;

    if( dinfo.displayable->isAnimated() )
    {
        auto foundAnim = m_ActiveAnimations.find( dinfo.displayable );
        if( foundAnim != m_ActiveAnimations.end() )
        {
            m_ActiveAnimations.erase( foundAnim );
            dinfo.displayable->onAnimationStop();
        }
    }

    disconnect( item->GetDisplayOptions(), SIGNAL(parameterUpdated(UIParam*)), this, SLOT(update()) );
    disconnect( item->GetDisplayOptions(), SIGNAL(parameterUpdated(UIParam*)), dinfo.displayable, SLOT(updateParameter(UIParam*)) );

589
    if( !item->GetDisplayOptions()->IsEmpty() )
590
591
592
    {
        item->GetDisplayOptions()->hide();
        m_DisplayOptionsLayout->removeWidget( item->GetDisplayOptions() );
593
        item->GetDisplayOptions()->setParent( NULL );
594
595
    }

596
597
598
599
    for( auto mngr : dinfo.selectionMgr )
        delete mngr;
    dinfo.selectionMgr.clear();

600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
    dinfo.displayable->release( *item->GetDisplayOptions() );
    delete dinfo.displayable;
    m_DisplayablesByPriority[ m_Factories[item->GetTypeString()]->displayPriority() ].erase( dinfo.posInPriorityList );

    return m_Displayables.erase( dmapIt );
}


void GLViewer::removeDisplayable( GenericUIData *m )
{
    DisplayableMap::iterator foundDisp = m_Displayables.find( m );
    if( foundDisp != m_Displayables.end() )
    {
        makeCurrent();

        if( dof() == DISPLAY_DOF_2D )
        {
            m_AddingOrder.remove( &foundDisp->second );
            removeDisplayable_Internal( foundDisp );
            repackDisplayables();
            frameAll();
        }
        else
            removeDisplayable_Internal( foundDisp );

        update();
    }
}


void GLViewer::removeAllDisplayables()
{
    makeCurrent();

	DisplayableMap::iterator disp = m_Displayables.begin();
    while( disp != m_Displayables.end() )
        disp = removeDisplayable_Internal( disp );

    m_AddingOrder.clear();

    update();
}


void GLViewer::initializeGL()
{
    makeCurrent();
    glewInit();

    setFocusPolicy( Qt::ClickFocus );

    resizeGL( width(), height() );

    update();
}


void GLViewer::mouseMotionNavigationEvent( float dx, float dy, QMouseEvent *evt )
{
    if( dof() == DISPLAY_DOF_2D )
    {
        if( evt->buttons() & Qt::MidButton )
	    {
            double proj[16];
            glGetDoublev( GL_PROJECTION_MATRIX, proj );
            double scaleFactor = 2.0*distToFocusPoint() / (width()*proj[0]);

		    double scaledDX = dx * scaleFactor;
		    double scaledDY = dy * scaleFactor;

            QVector3D fpoint = focusPoint();
            fpoint[0] += scaledDY*viewRotationMatrix()(1,0) - scaledDX*viewRotationMatrix()(0,0);
            fpoint[1] += scaledDY*viewRotationMatrix()(1,1) - scaledDX*viewRotationMatrix()(0,1);
            setFocusPoint( fpoint );

    	    update();
	    }
#if 0
        else if( evt->buttons() & Qt::LeftButton )
	    {
            const double orientation = (evt->x()-0.5*width())*dy - (evt->y()-0.5*height())*dx;

            Matrix4Dd deltaRot;
            if( orientation > 0.0 )
    		    deltaRot.SetRotation( Vector3Dd(0,0,1), -0.5*M_PI/180.0*std::sqrt(dx*dx+dy*dy) );
            else
    		    deltaRot.SetRotation( Vector3Dd(0,0,1),  0.5*M_PI/180.0*std::sqrt(dx*dx+dy*dy) );
            setViewRotationMatrix( viewRotationMatrix() * deltaRot );

            update();
	    }
#endif
    }
    else
    {
        if( evt->buttons() & Qt::LeftButton  &&  evt->buttons() & Qt::RightButton )
        {
            QVector3D axis( dy, dx, 0.0f );
            double axisLen = axis.length();

            QMatrix4x4 deltaRot;
            deltaRot.rotate( 0.5f*axisLen, axis/axisLen );

703
704
            if( m_View.isLightTrackingEnabled )
                m_View.lightRotationMatrix = deltaRot * m_View.lightRotationMatrix;
705
            else
706
                m_View.lightRotationMatrix = viewRotationMatrix() * deltaRot * viewRotationMatrix().inverted() * m_View.lightRotationMatrix;
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767

            update();
        }
        else if( evt->buttons() & Qt::MidButton )
	    {
            double proj[16];
            glGetDoublev( GL_PROJECTION_MATRIX, proj );
            double scaleFactor = 2.0*distToFocusPoint() / (width()*proj[0]);

		    double scaledDX = dx * scaleFactor;
		    double scaledDY = dy * scaleFactor;

            QVector3D fpoint = focusPoint();
            fpoint[0] += scaledDY*viewRotationMatrix()(1,0) - scaledDX*viewRotationMatrix()(0,0);
            fpoint[1] += scaledDY*viewRotationMatrix()(1,1) - scaledDX*viewRotationMatrix()(0,1);
            fpoint[2] += scaledDY*viewRotationMatrix()(1,2) - scaledDX*viewRotationMatrix()(0,2);
            setFocusPoint( fpoint );

            emit screenSpaceTranslation( QVector2D(-scaledDX,scaledDY) );

    	    update();
	    }
	    else if( evt->buttons() & Qt::LeftButton )
	    {
            QMatrix4x4 deltaRot;

		    if( evt->pos().x() < 0.15f*width() )
                deltaRot.rotate(  0.5f*dy, 0,0,1 );
		    else if( evt->pos().x() > 0.85f*width() )
			    deltaRot.rotate( -0.5f*dy, 0,0,1 );
		    else
            {
                QVector3D axis( dy, dx, 0.0f );
                double axisLen = axis.length();
			    deltaRot.rotate(  0.5f*axisLen, axis/axisLen );
            }

            emit viewRotationMatrixUpdated( deltaRot );
            setViewRotationMatrix( deltaRot * viewRotationMatrix() );

            update();
	    }
    }
}


QMatrix4x4 GLViewer::viewportMatrix( bool flipY ) const
{
    const float xOff = 0.5f*width(), yOff = 0.5f*height();
    const float xAmp = xOff, yAmp = flipY? 1.0f - yOff : yOff;

    return QMatrix4x4( xAmp, 0.0f, 0.0f, xOff,
                       0.0f, yAmp, 0.0f, yOff,
                       0.0f, 0.0f, 1.0f, 0.0f,
                       0.0f, 0.0f, 0.0f, 1.0f );
}


QMatrix4x4 GLViewer::modelMatrix( const DisplayableInterface *d ) const
{
    auto dispInfo = m_Displayables.find(d->getSource());
768
769
    assert( dispInfo != m_Displayables.end() );
    return dispInfo->second.GetTransform();
770
771
772
773
774
775
776
777
778
779
780
781
782
783
}


void GLViewer::manageAnimations()
{
    // Check if animated objects waiting to be started are pending.

    while( !m_AnimationStartingQueue.isEmpty() )
    {
        auto anim = m_AnimationStartingQueue.front();
        m_AnimationStartingQueue.pop_front();

        if( !m_ActiveAnimations.contains(anim) )
        {
784
            m_ActiveAnimations[anim] = 0.0;
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
            anim->onAnimationStart();
        }
    }


    // Check if animated objects waiting to be stopped are pending.

    while( !m_AnimationStoppingQueue.isEmpty() )
    {
        auto anim = m_AnimationStoppingQueue.front();
        m_AnimationStoppingQueue.pop_front();

        auto foundAnim = m_ActiveAnimations.find( anim );
        if( foundAnim != m_ActiveAnimations.end() )
        {
            m_ActiveAnimations.erase( foundAnim );
            anim->onAnimationStop();
        }
    }


    // Check if at least one of the current animations is not paused.

    bool animationsRunning = false;

    for( auto anim=m_ActiveAnimations.begin(); anim!=m_ActiveAnimations.end(); ++anim )
        if( !anim.key()->isAnimationPaused() )
        {
            animationsRunning = true;
            break;
        }


818
819
    // Accurate measurement of the time elapsed since the last animation step.

Frédéric Larue's avatar
Frédéric Larue committed
820
821
822
    TimeMeasurement now = std::chrono::high_resolution_clock::now();
    double dt = 0.000001 * std::chrono::duration_cast< std::chrono::microseconds >( now - m_AnimationFrameTime ).count();
    m_AnimationFrameTime = now;
823
	m_AnimationFrameRate = float( 1.0 / dt );
824

825
826

    // Make all active animated objects to execute a new animation step.
Frédéric Larue's avatar
Frédéric Larue committed
827

828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
    if( animationsRunning )
    {
        if( m_AnimationsRunningAtPreviousFrame )
            for( auto anim=m_ActiveAnimations.begin(); anim!=m_ActiveAnimations.end(); ++anim )
                if( !anim.key()->isAnimationPaused() )
                {
                    if( anim.key()->animationTimeStepValue() != 0.0f )
                    {
                        anim.value() += dt;
                        if( anim.value() >= anim.key()->animationTimeStepValue() )
                        {
                            anim.key()->onAnimationStep( anim.value() );
                            anim.value() -= anim.key()->animationTimeStepValue();
                        }
                    }
                    else
                        anim.key()->onAnimationStep( dt );
                }

        update();
    }


    m_AnimationsRunningAtPreviousFrame = animationsRunning;
}


void GLViewer::paintGL()
{
    manageAnimations();


    // Setting up the OpenGL viewport.
861

862
863
864
865
	glViewport( 0, 0, width(), height() );


    // Clear the frame buffer.
866

867
868
869
870
871
872
873
874
875
876
877
    glMatrixMode( GL_PROJECTION );
    glLoadIdentity();

    glMatrixMode( GL_MODELVIEW );
    glLoadIdentity();

    glDisable( GL_LIGHTING );
    glDisable( GL_DEPTH_TEST );
    glDepthMask( GL_FALSE );

    glBegin( GL_QUADS );
878
879
880
        //glColor3ub( 132, 132, 132 );
        //glColor3ub( 58, 58, 58 );
        glColor3ub( 42, 42, 42 );
881
882
        glVertex2i( -1, -1 );
        glVertex2i(  1, -1 );
883
884
885
        //glColor3ub( 208, 208, 208 );
        //glColor3ub( 134, 134, 134 );
        glColor3ub( 118, 118, 118 );
886
887
888
889
890
891
892
893
894
        glVertex2i(  1,  1 );
        glVertex2i( -1,  1 );
    glEnd();

    glDepthMask( GL_TRUE );

	glClear( GL_DEPTH_BUFFER_BIT );


895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
    // Update the projection and view matrices, if needed.

    if( m_MustUpdateFocal )
    {
        m_Focal = 1.0 / std::tan( fovY()*M_PI/360.0 );

        m_MustUpdateFocal = false;
        m_MustUpdateProjectionMatrix = true;
    }

    bool mustUpdateViewProjectionMatrix = false;

    if( m_MustUpdateProjectionMatrix )
    {
        m_ProjectionMatrix.fill( 0.0f );
        m_ProjectionMatrix(0,0) = focal() * height() / width();
        m_ProjectionMatrix(1,1) = focal();
        m_ProjectionMatrix(2,2) = (zNear() + zFar())  / (zNear() - zFar());
        m_ProjectionMatrix(2,3) = 2.0f*zNear()*zFar() / (zNear() - zFar());
        m_ProjectionMatrix(3,2) = -1.0f;

        m_ProjectionMatrixInverse = m_ProjectionMatrix.inverted();

        m_MustUpdateProjectionMatrix = false;
        mustUpdateViewProjectionMatrix = true;
    }

    if( m_MustUpdateViewMatrix )
    {
        m_ViewMatrix.setToIdentity();
        m_ViewMatrix.translate( 0.0, 0.0, -distToFocusPoint() );
        m_ViewMatrix *= viewRotationMatrix();
        m_ViewMatrix.translate( -focusPoint() );

        m_ViewMatrixInverse = m_ViewMatrix.inverted();

931
932
        m_ViewRotationMatrixInverse = viewRotationMatrix().inverted();

933
934
935
936
937
938
939
940
        m_MustUpdateViewMatrix = false;
        mustUpdateViewProjectionMatrix = true;
    }

    if( mustUpdateViewProjectionMatrix )
    {
        m_ViewProjectionMatrix = m_ProjectionMatrix * m_ViewMatrix;
        m_ViewProjectionMatrixInverse = m_ViewMatrixInverse * m_ProjectionMatrixInverse;
941
942

        m_PixelToRayMatrix = viewRotationMatrixInverse() * projectionMatrixInverse();
943
944

        m_Frustum.UpdateFrustumPlanes( m_ViewMatrix, m_ProjectionMatrix );
945
946
947
948
949
    }

    // Setup the OpenGL transforms and viewport.

    glMatrixMode( GL_PROJECTION );
950
951
952
953
954
    glLoadMatrixf( projectionMatrix().data() );

    glMatrixMode( GL_MODELVIEW );
    glLoadMatrixf( viewMatrix().data() );

955
    glPointSize( (GLfloat) m_View.pointSize );
956
957
958
959
960
961
962
963
    glColor3ub( 255, 255, 255 );

    setupScene();


    // Display the scene content by increasing priority.
    for( PriorityMap::iterator dlist=m_DisplayablesByPriority.begin(); dlist!=m_DisplayablesByPriority.end(); ++dlist )
        for( DisplayableList::iterator dinfo=dlist->second.begin(); dinfo!=dlist->second.end(); ++dinfo )
964
965
966
967
968
969
970
            if( !m_Frustum.IsOutside( (*dinfo)->boundingBox, (*dinfo)->GetTransform() ) )
            {
                glPushMatrix();
                glMultMatrixf( (*dinfo)->GetTransform().data() );
                glPushAttrib( GL_ALL_ATTRIB_BITS );
                (*dinfo)->displayable->onDisplay( *(*dinfo)->displayable->getSource()->GetDisplayOptions() );
                displayLabel( (*dinfo)->displayable );
971
972
                if( (*dinfo)->currentSelectionMgr )
                    (*dinfo)->currentSelectionMgr->onDisplay( this, (*dinfo)->GetTransform() );
973
974
975
976
                glPopAttrib();
                glPopMatrix();
            }

977
978
979
980
981

    // Finalize the rendering.
    releaseScene();

    // Display the metric grid.
982
983
984
985
986
987
988
989
    glPolygonMode( GL_FRONT_AND_BACK, GL_FILL );
    glDepthMask( GL_FALSE );
    glEnable( GL_DEPTH_TEST );
    if( dof() == DISPLAY_DOF_2D )
        m_View.metricGrid2D.display( this );
    else
        m_View.metricGrid3D.display( this );
    glDepthMask( GL_TRUE );
990

991
992
993
    // Display the label of the object under the mouse cursor.
    if( dof() == DISPLAY_DOF_3D  &&  m_BelowCursor )
    {
994
        double textX, textY;
995
996
997
998
999
        //QVector3D c = m_BelowCursor->GetTransform().map( m_BelowCursor->boundingBox.Center() );
        //renderCoords( c.x(), c.y(), c.z(), &textX, &textY );
        QPoint c = mapFromGlobal( cursor().pos() );
        textX = c.x();
        textY = c.y();
1000
1001

        QString label = m_BelowCursor->displayable->label();
1002
        QFont f( font().family(), 10, QFont::Bold );
1003

1004
        Qt::Alignment align = static_cast<Qt::Alignment>( Qt::AlignHCenter | Qt::AlignBottom );
1005
1006

        glColor3ub( 220, 220, 220 );
1007
1008
1009
1010
        renderText( textX-1, textY-1, label, f, align );
        renderText( textX-1, textY+1, label, f, align );
        renderText( textX+1, textY-1, label, f, align );
        renderText( textX+1, textY+1, label, f, align );
1011
        glColor3ub( 64, 64, 64 );
1012
        renderText( textX, textY, label, f, align );
1013
    }
1014
1015
1016
1017
1018
1019
1020
1021
1022

    // Display the selection tool, if selection mode is enabled.
    if( isSelectionEnabled() )
    {
        m_SelectionCurrentTool->displaySelectionState();
        m_SelectionCurrentTool->display();
    }


1023
1024
1025
1026
1027
1028
1029
1030
1031
	if( m_PerformanceCounterEnabled )
	{
		QString label = QString::number( m_AnimationFrameRate, 'f', 2 ) + " FPS";
		glColor3ub( 0, 0, 0 );
		renderText( 10, 10, label, QFont( font().family(), 20, QFont::Bold ), static_cast<Qt::Alignment>( Qt::AlignLeft | Qt::AlignTop ) );
		update();
	}


1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
    // Display the information bar.
    m_InfoBarManager->display();
}


void GLViewer::setupScene()
{
    // Setup the OpenGL states.

    if( dof() == DISPLAY_DOF_2D )
    {
        glDisable( GL_DEPTH_TEST );
        glEnable( GL_MULTISAMPLE );
        glDisable( GL_LIGHTING );
    }
    else
    {
        // Place the light into the scene.
        glMatrixMode( GL_MODELVIEW );
        glPushMatrix();

1053
        if( m_View.isLightTrackingEnabled )
1054
            glLoadIdentity();
1055
        glMultMatrixf( m_View.lightRotationMatrix.data() );
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066

        GLfloat lightPos[4] = { 0.0f, 0.0f, 1.0f, 0.0f };
        glLightfv( GL_LIGHT0, GL_POSITION, lightPos );

        glPopMatrix();


        // Setup the OpenGL states.
	    glEnable( GL_DEPTH_TEST );
        glEnable( GL_MULTISAMPLE );

1067
        if( m_View.isLightingEnabled )
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
        {
            glEnable( GL_LIGHTING );
            glEnable( GL_LIGHT0 );
            glEnable( GL_COLOR_MATERIAL );
        }
        else
        {
            glDisable( GL_LIGHTING );
            glDisable( GL_LIGHT0 );
            glDisable( GL_COLOR_MATERIAL );
        }

1080
        glPolygonMode( GL_FRONT_AND_BACK, m_View.isWireframeEnabled && !m_SelectionEnabled? GL_LINE : GL_FILL );
1081

1082
        if( m_View.isCullingEnabled )
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
        {
            glEnable( GL_CULL_FACE );
            glCullFace( GL_BACK );
        }
        else
            glDisable( GL_CULL_FACE );
    }
}


void GLViewer::displayLabel( DisplayableInterface *d )
{
    if( dof() == DISPLAY_DOF_2D )
    {
        Box3f box;
        d->boundingBox( box );


        // Display the black border.

        glColor3ub( 0, 0, 0 );

        glBegin( GL_LINE_LOOP );
            glVertex2f( box.Min().x(), box.Min().y() );
            glVertex2f( box.Min().x(), box.Max().y() );
            glVertex2f( box.Max().x(), box.Max().y() );
            glVertex2f( box.Max().x(), box.Min().y() );
        glEnd();


        // Display the name of the image on overlay in the bottom-left corner, by constraining it to the displayed image rectangle.

1115
        QMatrix4x4 toViewportCoord = viewportMatrix(true) * MVPMatrix(d);
1116
1117
1118
        QVector3D bottomLeft = toViewportCoord.map( QVector3D( box.Min().x(), box.Min().y(), 0.0f ) );
        QVector3D topRight   = toViewportCoord.map( QVector3D( box.Max().x(), box.Max().y(), 0.0f ) );

1119
1120
        QFont f( font().family(), 10, QFont::Bold );
        QFontMetrics fm( f );
1121
1122
1123
1124
1125
1126

        QString imgName;
        int imgNameWidth;

        if( fm.height() < bottomLeft.y()-topRight.y()-4 )
        {
1127
            imgName = d->label();
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
            imgNameWidth = fm.width( imgName );

            if( imgNameWidth > topRight.x()-bottomLeft.x()-8 )
            {
                int imgNameLength = imgName.length();
                do
                {
                    -- imgNameLength;
                    imgNameWidth -= fm.width( imgName.at(imgNameLength) );
                } while( imgNameWidth > topRight.x()-bottomLeft.x()-8 );
                imgName = imgName.left( imgNameLength );
            }
        }

        if( imgName.length() > 0 )
        {
            int textX = bottomLeft.x() + 4;
1145
            int textY = bottomLeft.y() - 2;
1146
1147

            glColor3ub( 220, 220, 220 );
1148
1149
1150
1151
            renderText( textX-1, textY-1, imgName, f, Qt::AlignBottom );
            renderText( textX-1, textY+1, imgName, f, Qt::AlignBottom );
            renderText( textX+1, textY-1, imgName, f, Qt::AlignBottom );
            renderText( textX+1, textY+1, imgName, f, Qt::AlignBottom );
1152
            glColor3ub( 64, 64, 64 );
1153
            renderText( textX, textY, imgName, f, Qt::AlignBottom );
1154
1155
1156
1157
1158
1159
1160
        }
    }
}


void GLViewer::resizeGL( int width, int height )
{
1161
1162
    m_MustUpdateProjectionMatrix = true;

1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
	glViewport( 0, 0, width, height );

    m_InfoBarManager->onReshape();

    for( DisplayableMap::iterator d=m_Displayables.begin(); d!=m_Displayables.end(); ++d )
        d->second.displayable->onReshape( *d->first->GetDisplayOptions() );

    if( isSelectionEnabled() )
        m_SelectionCurrentTool->onResize();

    updateSelectionZBuffer();
}


void GLViewer::updateSelection( SelectionTool &tool )
{
    makeCurrent();

    // Initializes the GL transformation so as to match the current view.

	glMatrixMode( GL_PROJECTION );
    glLoadMatrixf( projectionMatrix().data() );

    glMatrixMode( GL_MODELVIEW );
    glLoadMatrixf( viewMatrix().data() );


    // Initializes the selection context.

1192
    tool.setDepthBuffer( m_SelectionDepthTexture );
1193
    tool.selectBackFacingGeometry( m_View.isCullingEnabled? GL_FALSE : GL_TRUE );
1194
1195
1196
1197
1198
1199
    tool.preSelectionUpdate();


    // Checks every item that can be selected.

    for( DisplayableMap::iterator d=m_Displayables.begin(); d!=m_Displayables.end(); ++d )
1200
        if( d->second.currentSelectionMgr )
1201
1202
        {
            glPushMatrix();
1203
            glMultMatrixf( d->second.GetTransform().data() );
1204
            d->second.currentSelectionMgr->onUpdatingSelection( &tool );
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
            glPopMatrix();
        }


    tool.postSelectionUpdate();
}


void GLViewer::updateSelectionMode( const Qt::KeyboardModifiers &modifiers )
{
    if( isSelectionEnabled() )
    {
        SelectionTool::SelectionMode newMode;

        if( modifiers & Qt::ShiftModifier )
            newMode = SelectionTool::SELECTION_MODE_SET;
        else if( modifiers & Qt::ControlModifier )
            newMode = SelectionTool::SELECTION_MODE_REMOVE;
        else
            newMode = SelectionTool::SELECTION_MODE_ADD;

        if( m_SelectionCurrentTool->selectionMode() != newMode )
        {
            m_SelectionCurrentTool->setSelectionMode( newMode );
            update();
        }
    }
}


void GLViewer::updateSelectionZBuffer()
{
    if( !isSelectionEnabled() )
        return;

    makeCurrent();


    // Creates the shader that makes it possible to recover the scene Z-buffer.

    if( !m_ZBufferShader.IsCreated() )
    {
        std::string logs;
        if( !GPU::CreateShaderFromSources( m_ZBufferShader, s_ZBufferVPG, s_ZBufferFPG, &logs ) )
        {
            std::cout << "Z-buffer shader compilation error:" << std::endl << logs << std::endl;
            return;
        }
    }


    // Recovers the depth buffer matching the current view for depth test during selection.

1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
    if( !m_SelectionDepthTexture.IsInstantiated() )
    {
        m_SelectionDepthTexture.Create( GL_DEPTH_COMPONENT, width(), height(), GL_DEPTH_COMPONENT, GL_INT, NULL );
        m_SelectionDepthTexture.SetFiltering( GL_LINEAR );
        m_SelectionDepthTexture.SetBaseAndMaxLevels( 0 );
        m_SelectionDepthTexture.SetCompareMode( GL_COMPARE_R_TO_TEXTURE );
        m_SelectionDepthTexture.SetCompareFunc( GL_LEQUAL );
        m_SelectionDepthTexture.SetDepthTextureMode( GL_INTENSITY );

        m_SelectionDepthBuffer.Create( width(), height() );
        m_SelectionDepthBuffer.Attach( GL_DEPTH_ATTACHMENT, m_SelectionDepthTexture );
    }
1270

1271
    m_SelectionDepthBuffer.Bind();
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283

    glClear( GL_DEPTH_BUFFER_BIT );


    // Setting up the OpenGL transforms and viewport.

	glMatrixMode( GL_PROJECTION );
    glLoadMatrixf( projectionMatrix().data() );

    glMatrixMode( GL_MODELVIEW );
    glLoadMatrixf( viewMatrix().data() );

1284
    glPointSize( (GLfloat) m_View.pointSize );
1285
1286
1287
1288
1289
1290
1291
1292

    setupScene();


    // Display the scene content by increasing priority.

    for( PriorityMap::iterator dlist=m_DisplayablesByPriority.begin(); dlist!=m_DisplayablesByPriority.end(); ++dlist )
        for( DisplayableList::iterator dinfo=dlist->second.begin(); dinfo!=dlist->second.end(); ++dinfo )
1293
1294
1295
1296
1297
1298
1299
            if( !m_Frustum.IsOutside( (*dinfo)->boundingBox, (*dinfo)->GetTransform() ) )
            {
                m_ZBufferShader.SetUniform( "fullTransformMatrix", (viewProjectionMatrix() * (*dinfo)->GetTransform()).data() );
                glPushAttrib( GL_ALL_ATTRIB_BITS );
                (*dinfo)->displayable->onPicking( *(*dinfo)->displayable->getSource()->GetDisplayOptions(), m_ZBufferShader, "vertexPosition" );
                glPopAttrib();
            }
1300
1301
1302
1303
1304
1305


    // Finalize the rendering.

    releaseScene();

1306
    m_SelectionDepthBuffer.Unbind();
1307
1308
1309
1310
1311
}


void GLViewer::processSelection( BaseSelectionProcessor &proc )
{
1312
1313
    QList<BaseSelectionProcessor*> procList;
    procList << &proc;
1314
1315
1316
1317
    processSelection( procList );
}


1318
void GLViewer::processSelection( QList<BaseSelectionProcessor*> &procList )
1319
{
1320
    QMap< QString, BaseSelectionProcessor* > processorByType;
1321

1322
    for( BaseSelectionProcessor* p : procList )
1323
    {
1324
1325
        QStringList acceptedTypes;
        p->acceptedDataType( acceptedTypes );
1326

1327
1328
        for( QString& type : acceptedTypes )
            processorByType[type] = p;
1329
1330
    }

1331
    for( auto& d : m_Displayables )
1332
    {
1333
1334
1335
        QMap< QString, BaseSelectionProcessor* >::iterator processorFound = processorByType.find( d.first->GetTypeString() );
        if( processorFound != processorByType.end() )
            processSelection( d.second, *processorFound.value() );
1336
1337
1338
1339
1340
1341
1342
    }
}


void GLViewer::processSelection( GenericUIData *m, BaseSelectionProcessor &proc )
{
    DisplayableMap::iterator displayableFound = m_Displayables.find( m );
1343
1344
1345
    if( displayableFound != m_Displayables.end() )
        processSelection( displayableFound->second, proc );
}
1346
1347


1348
1349
1350
1351
1352
1353
void GLViewer::processSelection( DisplayableInterface *d, BaseSelectionProcessor &proc )
{
    processSelection( d->getSource(), proc );
}


1354
1355
1356
1357
void GLViewer::processSelection( DisplayableInfo &dInfo, BaseSelectionProcessor &proc )
{
    DisplayableInterface *d   = dInfo.displayable;
    GenericUIData        *m   = d->getSource();
1358
    SelectionManager     *mgr = dInfo.currentSelectionMgr;
1359

1360
    if( !mgr  ||  mgr->selectableEntity() != proc.entityToProcess() )
1361
        return;
1362

1363
    QStringList acceptedTypes;
1364
1365
    proc.acceptedDataType( acceptedTypes );

1366
1367
1368
1369
1370
    if( acceptedTypes.contains(m->GetTypeString()) )
    {
        proc.init( m );
        d->processSelection( mgr, proc );
        proc.release( m );
1371

1372
1373
        if( proc.isDisplayableUpdateRequired() )
        {
1374
            updateDisplayable( m, proc.isSelectionResetRequired() );
1375
            updateSelectionZBuffer();
1376
        }
1377
1378
		else if( proc.isSelectionResetRequired() )
			mgr->clearSelection();
1379
    }
1380
1381
1382
}


1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
void GLViewer::renderCoords( double x, double y, double z, double *screenX, double *screenY )
{
    // Identify x and y locations to render text within widget

    QMatrix4x4 model, proj;
    GLint viewport[4];
    glGetFloatv( GL_MODELVIEW_MATRIX, model.data() );
    glGetFloatv( GL_PROJECTION_MATRIX, proj.data() );
    glGetIntegerv( GL_VIEWPORT, viewport );

    *screenX = *screenY = 0.0;
    QVector4D out = proj.map( model.map( QVector4D(x,y,z,1.0f) ) );

    if( out.w() != 0.0f )
    {
        float wInv = 1.0f / out.w();
        out.setX( out.x() * wInv );
        out.setY( out.y() * wInv );

        *screenX = viewport[0] + (1 + out.x()) * 0.5 * viewport[2];
        *screenY = viewport[1] + (1 + out.y()) * 0.5 * viewport[3];
    }

    *screenY = this->height() - *screenY; // y is inverted
}


1410
void GLViewer::renderText( double x, double y, const QString &text, const QFont &font, Qt::Alignment align )
1411
{
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
    QFontMetrics fm( font );

    // Extract lines from the input strings.

    QStringList textLines;

    int beg = 0, end;
    while( (end = text.indexOf('\n',beg)) >= 0 )
    {
        textLines.push_back( text.mid(beg,end-beg) );
        beg = end + 1;
    }

    textLines.push_back( (beg==0)? text : text.mid(beg) );

1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
    // Save OpenGL states.

    GLint buffer;
    GLboolean depthTest;
	GLboolean blend;
	GLint blendSrcRGB, blendSrcAlpha;
	GLint blendDstRGB, blendDstAlpha;

    glGetIntegerv( GL_FRAMEBUFFER_BINDING, &buffer );
	glGetBooleanv( GL_DEPTH_TEST, &depthTest );
	glGetBooleanv( GL_BLEND, &blend );
	glGetIntegerv( GL_BLEND_SRC_RGB  , &blendSrcRGB   );
	glGetIntegerv( GL_BLEND_SRC_ALPHA, &blendSrcAlpha );
	glGetIntegerv( GL_BLEND_DST_RGB  , &blendDstRGB   );
	glGetIntegerv( GL_BLEND_DST_ALPHA, &blendDstAlpha );

    // Retrieve last OpenGL color to use as a font color.

    GLfloat glColor[4];
    glGetFloatv( GL_CURRENT_COLOR, glColor );
    QColor fontColor = QColor( 255.0f*glColor[0], 255.0f*glColor[1], 255.0f*glColor[2], 255.0f*glColor[3] );

	// Paint text.

1451
1452
1453
1454
1455
1456
    if( align & Qt::AlignBottom )
        y -= (textLines.size()-1) * fm.lineSpacing() + fm.descent();
    else if( align & Qt::AlignVCenter )
        y -= ((textLines.size()) * fm.lineSpacing())/2 - fm.ascent();
	else if( align & Qt::AlignTop )
		y += fm.ascent();
1457

1458
1459
1460
1461
    QPainter painter;
    painter.begin( this );
	    painter.setPen( fontColor );
	    painter.setFont( font );
1462
1463
1464
1465
1466
1467
1468
1469
        for( auto &l : textLines )
        {
            if( align & Qt::AlignRight )
        		painter.drawText( x - fm.width(l), y, l );
            else if( align & Qt::AlignHCenter )
        		painter.drawText( x - fm.width(l)/2, y, l );
            else
        		painter.drawText( x, y, l );
1470
            y += fm.lineSpacing();
1471
        }
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
    painter.end();

	// Restore OpenGL states.

    glBindFramebufferEXT( GL_FRAMEBUFFER_EXT, buffer );
    depthTest?  glEnable( GL_DEPTH_TEST )  :  glDisable( GL_DEPTH_TEST );
    blend?  glEnable( GL_BLEND )  :  glDisable( GL_BLEND );
	glBlendFuncSeparateEXT( blendSrcRGB, blendDstRGB, blendSrcAlpha, blendDstAlpha );
    glColor4fv( glColor );
}


1484
void GLViewer::renderText( double x, double y, double z, const QString &text, const QFont &font, Qt::Alignment align )
1485
{
1486
1487
    double screenX, screenY;
    renderCoords( x, y, z, &screenX, &screenY );
1488
    renderText( screenX, screenY, text, font, align );
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
}


bool GLViewer::imageOfCurrentDisplay( const GenericUIData *m, QImage &renderResult )
{
    // Check if the provided item is currently displayed.

    DisplayableInterface *d = getDisplayable( m );

    if( !d )
        return false;


    // Recover its dimensions so as to determine the size of the rendering output buffer.

    Box3f dBox;
    d->boundingBox( dBox );

    int w = (int) dBox.Dimensions().x();
    int h = (int) dBox.Dimensions().y();


    // Perform off-screen rendering.

    makeCurrent();

    GPU::FrameBuffer fb( w, h );
    fb.Attach( GL_COLOR_ATTACHMENT0, GL_RGBA );
    fb.Bind();


    glMatrixMode( GL_PROJECTION );
    glPushMatrix();
    glLoadIdentity();
    glOrtho( dBox.Min().x(), dBox.Max().x(), dBox.Max().y(), dBox.Min().y(), -1.0f, 1.0f );
1524
1525
1526
1527
1528
    glMultMatrixf( m_ViewMatrixInverse.data() );
    glMultMatrixf( modelMatrixInverse(d).data() );

    QMatrix4x4 projBackup = m_ProjectionMatrix;
    glGetFloatv( GL_PROJECTION_MATRIX, m_ProjectionMatrix.data() );
1529
1530
1531

    glMatrixMode( GL_MODELVIEW );
    glPushMatrix();
1532
1533
    glLoadMatrixf( m_ViewMatrix.data() );
    glMultMatrixf( modelMatrix(d).data() );
1534
1535
1536

    d->onDisplay( *m->GetDisplayOptions() );

1537
    glMatrixMode( GL_MODELVIEW );
1538
1539
1540
1541
    glPopMatrix();
    glMatrixMode( GL_PROJECTION );
    glPopMatrix();

1542
1543
    m_ProjectionMatrix = projBackup;

1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
    fb.Unbind();


    // Recover the render result and store it to the provided image object.

    GLubyte *fbData = new GLubyte [ 4*w*h ];
    fb.DumpTo( GL_COLOR_ATTACHMENT0, fbData, GL_RGBA, GL_UNSIGNED_BYTE );

    renderResult = QImage( w, h, QImage::Format_RGBA8888 );
    for( int y=0, n=0; y<h; ++y )
    {
        unsigned char *lineData = renderResult.scanLine( y );
        for( int x=0; x<4*w; ++x, ++n )
            lineData[x] = fbData[n];
    }

1560
    delete[] fbData;
1561
1562
1563
1564
1565
1566


    return true;
}


1567
1568
1569
1570
1571
1572
1573
void GLViewer::enterEvent( QEvent* evt )
{
    setFocus();
    QOpenGLWidget::enterEvent( evt );
}


1574
1575
1576
1577
1578
1579
void GLViewer::mousePressEvent( QMouseEvent *evt )
{
    if( dof() == DISPLAY_DOF_2D )
    {
        PickedPoint p;

1580
        if( !isSelectionEnabled()  &&  evt->button() == Qt::RightButton  &&  getPickedPoint( evt->pos().x(), height()-evt->pos().y(), p, true ) )
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
        {
            QMenu ctxMenu;
            ctxMenu.addAction( "Save current render" );

            if( ctxMenu.exec( evt->globalPos() ) )
            {
		        QStringList filters;
			    QString allImages;
                foreach( QByteArray ext, QImageWriter::supportedImageFormats() )
			    {
		            filters << QString(ext).toUpper() + " image files (*." + ext + ")";
				    allImages += " *." + ext;
			    }
			    filters.push_front( "All image files (" + allImages + " )" );

		        QFileDialog dlg( this, "Save image" );
		        dlg.setAcceptMode( QFileDialog::AcceptSave );
                dlg.setFileMode( QFileDialog::AnyFile );
                dlg.setNameFilters( filters );

			    if( dlg.exec() )
			    {
				    QImage img;
				    imageOfCurrentDisplay( p.srcObject, img );
				    img.save( dlg.selectedFiles().front() );
			    }
            }
        }
    }


    if( isSelectionEnabled() )
    {
        if( evt->button() == Qt::RightButton )
            toggleSelection();
        else
        {
            makeCurrent();
1619
1620
            if( m_SelectionZBufferUpdateMode & SelectionZBufferUpdateMode::ON_MOUSE_PRESSED )
                updateSelectionZBuffer();
1621
1622
1623
1624
            m_SelectionCurrentTool->mousePressEvent( evt );
        }
    }

1625
    m_ClickMousePos = m_PrevMousePos = evt->pos();
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635

    update();
}


void GLViewer::mouseReleaseEvent( QMouseEvent *evt )
{
    if( isSelectionEnabled() )
    {
        makeCurrent();
1636
1637
        if( m_SelectionZBufferUpdateMode & SelectionZBufferUpdateMode::ON_MOUSE_RELEASED )
            updateSelectionZBuffer();
1638
1639
1640
        m_SelectionCurrentTool->mouseReleaseEvent( evt );
        updateSelectionMode( evt->modifiers() );
    }
1641
1642
1643
1644
    else if( evt->button() == Qt::RightButton  &&  evt->pos() == m_ClickMousePos  &&  m_BelowCursor )
    {
        emit dataSelected( m_BelowCursor->displayable->getSource(), evt->modifiers() );
    }
1645
1646
1647
1648
1649

    update();
}


1650
1651
1652
1653
1654
1655
void GLViewer::findObjectUnderCursor( const QPoint& cursor )
{
    PickedPoint pp;
    if( getPickedPoint( cursor.x(), height()-cursor.y(), pp, true ) )
    {
        auto disp = &m_Displayables[ pp.srcObject ];
1656
        //if( disp != m_BelowCursor )
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
        {
            m_BelowCursor = disp;
            update();
        }
    }
    else if( m_BelowCursor )
    {
        m_BelowCursor = NULL;
        update();
    }
}


void GLViewer::clearObjectUnderCursor()
{
    if( m_BelowCursor )
    {
        m_BelowCursor = NULL;
        update();
    }
}


1680
1681
void GLViewer::mouseMoveEvent( QMouseEvent *evt )
{
1682
1683
1684
    if( isSelectionEnabled() )
    {
        makeCurrent();
1685
1686
        if( evt->buttons() != Qt::MouseButton::NoButton  &&  (m_SelectionZBufferUpdateMode & SelectionZBufferUpdateMode::ON_MOUSE_MOVED) )
            updateSelectionZBuffer();
1687
1688
1689
1690
        m_SelectionCurrentTool->mouseMoveEvent( evt );
        update();
    }
    else if( evt->buttons() != Qt::NoButton )
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
    {
	    double dx = (evt->pos().x() - m_PrevMousePos.x());
	    double dy = (evt->pos().y() - m_PrevMousePos.y());
	    m_PrevMousePos = evt->pos();

        if( evt->modifiers() & Qt::ShiftModifier )
        {
            dx *= m_ShiftSpeedFactor;
            dy *= m_ShiftSpeedFactor;
        }
        else if( evt->modifiers() & Qt::ControlModifier )
        {
            dx *= m_CtrlSpeedFactor;
            dy *= m_CtrlSpeedFactor;
        }
        else
        {
            dx *= m_SpeedFactor;
            dy *= m_SpeedFactor;
        }

        mouseMotionNavigationEvent( dx, dy, evt );
    }
1714
1715
    else if( !isSelectionEnabled() )
        findObjectUnderCursor( evt->pos() );
1716
1717
1718
1719
1720
1721
1722
1723
1724
}


void GLViewer::wheelEvent( QWheelEvent* evt )
{
	if( evt->orientation() == Qt::Vertical )
	{
        if( !isSelectionEnabled() )
        {
1725
1726
1727
1728
            if( (evt->modifiers() & Qt::ShiftModifier  )  &&  (evt->modifiers() & Qt::ControlModifier) )
            {
                setFovY( fovY() + evt->delta()*M_PI/180.0f );
            }
1729
            else if( m_ChangeNearPlaneMode || m_ChangeFarPlaneMode )
1730
            {
Frédéric Larue's avatar