-
-
Notifications
You must be signed in to change notification settings - Fork 3k
/
qgspolygon3dsymbol_p.cpp
332 lines (266 loc) · 13.5 KB
/
qgspolygon3dsymbol_p.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
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
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
/***************************************************************************
qgspolygon3dsymbol_p.cpp
--------------------------------------
Date : July 2017
Copyright : (C) 2017 by Martin Dobias
Email : wonder dot sk at gmail dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "qgspolygon3dsymbol_p.h"
#include "qgspolygon3dsymbol.h"
#include "qgstessellatedpolygongeometry.h"
#include "qgs3dmapsettings.h"
#include "qgs3dutils.h"
#include "qgstessellator.h"
#include "qgsphongtexturedmaterialsettings.h"
#include <Qt3DCore/QTransform>
#include <Qt3DRender/QMaterial>
#include <Qt3DExtras/QPhongMaterial>
#include <Qt3DExtras/QDiffuseMapMaterial>
#include <Qt3DRender/QAbstractTextureImage>
#include <Qt3DRender/QTexture>
#include <Qt3DRender/QEffect>
#include <Qt3DRender/QTechnique>
#include <Qt3DRender/QCullFace>
#include <Qt3DRender/QGeometryRenderer>
#include "qgsvectorlayer.h"
#include "qgslinestring.h"
#include "qgsmultipolygon.h"
#include "qgslinevertexdata_p.h"
#include "qgslinematerial_p.h"
#include "qgsimagetexture.h"
/// @cond PRIVATE
class QgsPolygon3DSymbolHandler : public QgsFeature3DHandler
{
public:
QgsPolygon3DSymbolHandler( const QgsPolygon3DSymbol &symbol, const QgsFeatureIds &selectedIds )
: mSymbol( symbol ), mSelectedIds( selectedIds ) {}
bool prepare( const Qgs3DRenderContext &context, QSet<QString> &attributeNames ) override;
void processFeature( QgsFeature &feature, const Qgs3DRenderContext &context ) override;
void finalize( Qt3DCore::QEntity *parent, const Qgs3DRenderContext &context ) override;
private:
//! temporary data we will pass to the tessellator
struct PolygonData
{
std::unique_ptr<QgsTessellator> tessellator;
QVector<QgsFeatureId> triangleIndexFids;
QVector<uint> triangleIndexStartingIndices;
};
void processPolygon( QgsPolygon *polyClone, QgsFeatureId fid, float height, float extrusionHeight, const Qgs3DRenderContext &context, PolygonData &out );
void makeEntity( Qt3DCore::QEntity *parent, const Qgs3DRenderContext &context, PolygonData &out, bool selected );
Qt3DRender::QMaterial *material( const QgsPolygon3DSymbol &symbol, bool isSelected, const Qgs3DRenderContext &context ) const;
// input specific for this class
const QgsPolygon3DSymbol &mSymbol;
// inputs - generic
QgsFeatureIds mSelectedIds;
// outputs
PolygonData outNormal; //!< Features that are not selected
PolygonData outSelected; //!< Features that are selected
QgsLineVertexData outEdges; //!< When highlighting edges, this holds data for vertex/index buffer
};
bool QgsPolygon3DSymbolHandler::prepare( const Qgs3DRenderContext &context, QSet<QString> &attributeNames )
{
outEdges.withAdjacency = true;
outEdges.init( mSymbol.altitudeClamping(), mSymbol.altitudeBinding(), 0, &context.map() );
const QgsPhongTexturedMaterialSettings *texturedMaterialSettings = dynamic_cast< const QgsPhongTexturedMaterialSettings * >( mSymbol.material() );
outNormal.tessellator.reset( new QgsTessellator( context.map().origin().x(), context.map().origin().y(), true, mSymbol.invertNormals(), mSymbol.addBackFaces(), false,
texturedMaterialSettings && texturedMaterialSettings->requiresTextureCoordinates(),
mSymbol.renderedFacade(),
texturedMaterialSettings ? texturedMaterialSettings->textureRotation() : 0 ) );
outSelected.tessellator.reset( new QgsTessellator( context.map().origin().x(), context.map().origin().y(), true, mSymbol.invertNormals(),
mSymbol.addBackFaces(), false,
texturedMaterialSettings && texturedMaterialSettings->requiresTextureCoordinates(),
mSymbol.renderedFacade(),
texturedMaterialSettings ? texturedMaterialSettings->textureRotation() : 0 ) );
QSet<QString> attrs = mSymbol.dataDefinedProperties().referencedFields( context.expressionContext() );
attributeNames.unite( attrs );
return true;
}
void QgsPolygon3DSymbolHandler::processPolygon( QgsPolygon *polyClone, QgsFeatureId fid, float height, float extrusionHeight, const Qgs3DRenderContext &context, PolygonData &out )
{
if ( mSymbol.edgesEnabled() )
{
// add edges before the polygon gets the Z values modified because addLineString() does its own altitude handling
outEdges.addLineString( *static_cast<const QgsLineString *>( polyClone->exteriorRing() ), height );
for ( int i = 0; i < polyClone->numInteriorRings(); ++i )
outEdges.addLineString( *static_cast<const QgsLineString *>( polyClone->interiorRing( i ) ), height );
if ( extrusionHeight )
{
// add roof and wall edges
const QgsLineString *exterior = static_cast<const QgsLineString *>( polyClone->exteriorRing() );
outEdges.addLineString( *exterior, extrusionHeight + height );
outEdges.addVerticalLines( *exterior, extrusionHeight, height );
for ( int i = 0; i < polyClone->numInteriorRings(); ++i )
{
const QgsLineString *interior = static_cast<const QgsLineString *>( polyClone->interiorRing( i ) );
outEdges.addLineString( *interior, extrusionHeight + height );
outEdges.addVerticalLines( *interior, extrusionHeight, height );
}
}
}
Qgs3DUtils::clampAltitudes( polyClone, mSymbol.altitudeClamping(), mSymbol.altitudeBinding(), height, context.map() );
Q_ASSERT( out.tessellator->dataVerticesCount() % 3 == 0 );
uint startingTriangleIndex = static_cast<uint>( out.tessellator->dataVerticesCount() / 3 );
out.triangleIndexStartingIndices.append( startingTriangleIndex );
out.triangleIndexFids.append( fid );
out.tessellator->addPolygon( *polyClone, extrusionHeight );
delete polyClone;
}
void QgsPolygon3DSymbolHandler::processFeature( QgsFeature &f, const Qgs3DRenderContext &context )
{
if ( f.geometry().isNull() )
return;
PolygonData &out = mSelectedIds.contains( f.id() ) ? outSelected : outNormal;
QgsGeometry geom = f.geometry();
// segmentize curved geometries if necessary
if ( QgsWkbTypes::isCurvedType( geom.constGet()->wkbType() ) )
geom = QgsGeometry( geom.constGet()->segmentize() );
const QgsAbstractGeometry *g = geom.constGet();
const QgsPropertyCollection &ddp = mSymbol.dataDefinedProperties();
bool hasDDHeight = ddp.isActive( QgsAbstract3DSymbol::PropertyHeight );
bool hasDDExtrusion = ddp.isActive( QgsAbstract3DSymbol::PropertyExtrusionHeight );
float height = mSymbol.height();
float extrusionHeight = mSymbol.extrusionHeight();
if ( hasDDHeight )
height = ddp.valueAsDouble( QgsAbstract3DSymbol::PropertyHeight, context.expressionContext(), height );
if ( hasDDExtrusion )
extrusionHeight = ddp.valueAsDouble( QgsAbstract3DSymbol::PropertyExtrusionHeight, context.expressionContext(), extrusionHeight );
if ( const QgsPolygon *poly = qgsgeometry_cast< const QgsPolygon *>( g ) )
{
QgsPolygon *polyClone = poly->clone();
processPolygon( polyClone, f.id(), height, extrusionHeight, context, out );
}
else if ( const QgsMultiPolygon *mpoly = qgsgeometry_cast< const QgsMultiPolygon *>( g ) )
{
for ( int i = 0; i < mpoly->numGeometries(); ++i )
{
QgsPolygon *polyClone = static_cast< const QgsPolygon *>( mpoly->polygonN( i ) )->clone();
processPolygon( polyClone, f.id(), height, extrusionHeight, context, out );
}
}
else if ( const QgsGeometryCollection *gc = qgsgeometry_cast< const QgsGeometryCollection *>( g ) )
{
for ( int i = 0; i < gc->numGeometries(); ++i )
{
const QgsAbstractGeometry *g2 = gc->geometryN( i );
if ( QgsWkbTypes::flatType( g2->wkbType() ) == QgsWkbTypes::Polygon )
{
QgsPolygon *polyClone = static_cast< const QgsPolygon *>( g2 )->clone();
processPolygon( polyClone, f.id(), height, extrusionHeight, context, out );
}
}
}
else
qDebug() << "not a polygon";
}
void QgsPolygon3DSymbolHandler::finalize( Qt3DCore::QEntity *parent, const Qgs3DRenderContext &context )
{
// create entity for selected and not selected
makeEntity( parent, context, outNormal, false );
makeEntity( parent, context, outSelected, true );
mZMin = std::min( outNormal.tessellator->zMinimum(), outSelected.tessellator->zMinimum() );
mZMax = std::max( outNormal.tessellator->zMaximum(), outSelected.tessellator->zMaximum() );
// add entity for edges
if ( mSymbol.edgesEnabled() && !outEdges.indexes.isEmpty() )
{
QgsLineMaterial *mat = new QgsLineMaterial;
mat->setLineColor( mSymbol.edgeColor() );
mat->setLineWidth( mSymbol.edgeWidth() );
Qt3DCore::QEntity *entity = new Qt3DCore::QEntity;
// geometry renderer
Qt3DRender::QGeometryRenderer *renderer = new Qt3DRender::QGeometryRenderer;
renderer->setPrimitiveType( Qt3DRender::QGeometryRenderer::LineStripAdjacency );
renderer->setGeometry( outEdges.createGeometry( entity ) );
renderer->setVertexCount( outEdges.indexes.count() );
renderer->setPrimitiveRestartEnabled( true );
renderer->setRestartIndexValue( 0 );
// make entity
entity->addComponent( renderer );
entity->addComponent( mat );
entity->setParent( parent );
}
}
void QgsPolygon3DSymbolHandler::makeEntity( Qt3DCore::QEntity *parent, const Qgs3DRenderContext &context, PolygonData &out, bool selected )
{
if ( out.tessellator->dataVerticesCount() == 0 )
return; // nothing to show - no need to create the entity
Qt3DRender::QMaterial *mat = material( mSymbol, selected, context );
// extract vertex buffer data from tessellator
QByteArray data( ( const char * )out.tessellator->data().constData(), out.tessellator->data().count() * sizeof( float ) );
int nVerts = data.count() / out.tessellator->stride();
const QgsPhongTexturedMaterialSettings *texturedMaterialSettings = dynamic_cast< const QgsPhongTexturedMaterialSettings * >( mSymbol.material() );
QgsTessellatedPolygonGeometry *geometry = new QgsTessellatedPolygonGeometry( true, mSymbol.invertNormals(), mSymbol.addBackFaces(),
texturedMaterialSettings && texturedMaterialSettings->requiresTextureCoordinates() );
geometry->setData( data, nVerts, out.triangleIndexFids, out.triangleIndexStartingIndices );
Qt3DRender::QGeometryRenderer *renderer = new Qt3DRender::QGeometryRenderer;
renderer->setGeometry( geometry );
// make entity
Qt3DCore::QEntity *entity = new Qt3DCore::QEntity;
entity->addComponent( renderer );
entity->addComponent( mat );
entity->setParent( parent );
if ( !selected )
entity->findChild<Qt3DRender::QGeometryRenderer *>()->setObjectName( QStringLiteral( "main" ) ); // temporary measure to distinguish between "selected" and "main"
// cppcheck wrongly believes entity will leak
// cppcheck-suppress memleak
}
static Qt3DRender::QCullFace::CullingMode _qt3DcullingMode( Qgs3DTypes::CullingMode mode )
{
switch ( mode )
{
case Qgs3DTypes::NoCulling: return Qt3DRender::QCullFace::NoCulling;
case Qgs3DTypes::Front: return Qt3DRender::QCullFace::Front;
case Qgs3DTypes::Back: return Qt3DRender::QCullFace::Back;
case Qgs3DTypes::FrontAndBack: return Qt3DRender::QCullFace::FrontAndBack;
}
return Qt3DRender::QCullFace::NoCulling;
}
// front/back side culling
static void applyCullingMode( Qgs3DTypes::CullingMode cullingMode, Qt3DRender::QMaterial *material )
{
auto techniques = material->effect()->techniques();
for ( auto tit = techniques.constBegin(); tit != techniques.constEnd(); ++tit )
{
auto renderPasses = ( *tit )->renderPasses();
for ( auto rpit = renderPasses.begin(); rpit != renderPasses.end(); ++rpit )
{
Qt3DRender::QCullFace *cullFace = new Qt3DRender::QCullFace;
cullFace->setMode( _qt3DcullingMode( cullingMode ) );
( *rpit )->addRenderState( cullFace );
}
}
}
Qt3DRender::QMaterial *QgsPolygon3DSymbolHandler::material( const QgsPolygon3DSymbol &symbol, bool isSelected, const Qgs3DRenderContext &context ) const
{
QgsMaterialContext materialContext;
materialContext.setIsSelected( isSelected );
materialContext.setSelectionColor( context.map().selectionColor() );
Qt3DRender::QMaterial *material = symbol.material()->toMaterial( QgsMaterialSettingsRenderingTechnique::Triangles, materialContext );
applyCullingMode( symbol.cullingMode(), material );
return material;
}
// --------------
namespace Qgs3DSymbolImpl
{
QgsFeature3DHandler *handlerForPolygon3DSymbol( QgsVectorLayer *layer, const QgsAbstract3DSymbol *symbol )
{
const QgsPolygon3DSymbol *polygonSymbol = dynamic_cast< const QgsPolygon3DSymbol * >( symbol );
if ( !polygonSymbol )
return nullptr;
return new QgsPolygon3DSymbolHandler( *polygonSymbol, layer->selectedFeatureIds() );
}
Qt3DCore::QEntity *entityForPolygon3DSymbol( const Qgs3DMapSettings &map, QgsVectorLayer *layer, const QgsPolygon3DSymbol &symbol )
{
QgsFeature3DHandler *handler = handlerForPolygon3DSymbol( layer, &symbol );
Qt3DCore::QEntity *e = entityFromHandler( handler, map, layer );
delete handler;
return e;
}
}
/// @endcond