QGIS API Documentation 3.27.0-Master (1d7a28cfd2)
qgsfeature3dhandler_p.h
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1/***************************************************************************
2 qgsfeature3dhandler_p.h
3 --------------------------------------
4 Date : January 2019
5 Copyright : (C) 2019 by Martin Dobias
6 Email : wonder dot sk at gmail dot com
7 ***************************************************************************
8 * *
9 * This program is free software; you can redistribute it and/or modify *
10 * it under the terms of the GNU General Public License as published by *
11 * the Free Software Foundation; either version 2 of the License, or *
12 * (at your option) any later version. *
13 * *
14 ***************************************************************************/
15
16#ifndef QGSFEATURE3DHANDLER_P_H
17#define QGSFEATURE3DHANDLER_P_H
18
20
21//
22// W A R N I N G
23// -------------
24//
25// This file is not part of the QGIS API. It exists purely as an
26// implementation detail. This header file may change from version to
27// version without notice, or even be removed.
28//
29
30#include <Qt3DCore/QEntity>
31
32class QgsFeature;
33
34
36
38
39#define SIP_NO_FILE
40
41
48class Qgs3DRenderContext
49{
50 public:
51 Qgs3DRenderContext( const Qgs3DMapSettings &map ) : mMap( map ) {}
52
53 const Qgs3DMapSettings &map() const { return mMap; }
54
60 void setExpressionContext( const QgsExpressionContext &context ) { mExpressionContext = context; }
61
67 QgsExpressionContext &expressionContext() { return mExpressionContext; }
68
75 const QgsExpressionContext &expressionContext() const { return mExpressionContext; } SIP_SKIP
76
77 private:
78 const Qgs3DMapSettings &mMap;
80 QgsExpressionContext mExpressionContext;
81
82};
83
84
89class QgsFeature3DHandler
90{
91 public:
92 virtual ~QgsFeature3DHandler() = default;
93
98 virtual bool prepare( const Qgs3DRenderContext &context, QSet<QString> &attributeNames ) = 0;
99
104 virtual void processFeature( const QgsFeature &feature, const Qgs3DRenderContext &context ) = 0;
105
110 virtual void finalize( Qt3DCore::QEntity *parent, const Qgs3DRenderContext &context ) = 0;
111
116 float zMinimum() const { return mZMin; }
117
122 float zMaximum() const { return mZMax; }
123
127 int featureCount() const { return mFeatureCount; }
128
129 protected:
131 void updateZRangeFromPositions( const QVector<QVector3D> &positions );
132
133 protected:
134 float mZMin = std::numeric_limits<float>::max();
135 float mZMax = std::numeric_limits<float>::lowest();
136 int mFeatureCount = 0;
137};
138
139
140class Qgs3DMapSettings;
141class QgsVectorLayer;
142
143namespace Qgs3DSymbolImpl
144{
146 Qt3DCore::QEntity *entityFromHandler( QgsFeature3DHandler *handler, const Qgs3DMapSettings &map, QgsVectorLayer *layer );
147}
148
149
151
152#endif // QGSFEATURE3DHANDLER_P_H
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Definition: qgsfeature.h:56
Represents a vector layer which manages a vector based data sets.
#define SIP_SKIP
Definition: qgis_sip.h:126