QGIS API Documentation 3.27.0-Master (0a97e3138f)
qgsdemterraintileloader_p.h
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1/***************************************************************************
2 qgsdemterraintileloader_p.h
3 --------------------------------------
4 Date : July 2017
5 Copyright : (C) 2017 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 QGSDEMTERRAINTILELOADER_P_H
17#define QGSDEMTERRAINTILELOADER_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#define SIP_NO_FILE
31
32#include <QtConcurrent/QtConcurrentRun>
33#include <QFutureWatcher>
34#include <QElapsedTimer>
35#include <QMutex>
36
37#include "qgschunknode_p.h"
39#include "qgsrectangle.h"
41#include "qgstilingscheme.h"
42
44class QgsRasterLayer;
47
53class QgsDemTerrainTileLoader : public QgsTerrainTileLoader
54{
55 Q_OBJECT
56 public:
58 QgsDemTerrainTileLoader( QgsTerrainEntity *terrain, QgsChunkNode *node, QgsTerrainGenerator *terrainGenerator );
59
60 Qt3DCore::QEntity *createEntity( Qt3DCore::QEntity *parent ) override;
61
62 private slots:
63 void onHeightMapReady( int jobId, const QByteArray &heightMap );
64
65 private:
66
67 int mHeightMapJobId;
68 QByteArray mHeightMap;
69 int mResolution;
70 float mSkirtHeight;
71};
72
73
75
81class QgsDemHeightMapGenerator : public QObject
82{
83 Q_OBJECT
84 public:
85
90 QgsDemHeightMapGenerator( QgsRasterLayer *dtm, const QgsTilingScheme &tilingScheme, int resolution, const QgsCoordinateTransformContext &transformContext );
91 ~QgsDemHeightMapGenerator() override;
92
94 int render( const QgsChunkNodeId &nodeId );
95
97 void waitForFinished();
98
100 int resolution() const { return mResolution; }
101
103 float heightAt( double x, double y );
104
105 signals:
107 void heightMapReady( int jobId, const QByteArray &heightMap );
108
109 private slots:
110 void onFutureFinished();
111
112 private:
114 QgsRasterLayer *mDtm = nullptr;
115
117 QgsRasterDataProvider *mClonedProvider = nullptr;
118
119 QgsTilingScheme mTilingScheme;
120
121 int mResolution;
122
123 int mLastJobId;
124
125 std::unique_ptr<QgsTerrainDownloader> mDownloader;
126
127 struct JobData
128 {
129 int jobId;
130 QgsChunkNodeId tileId;
131 QgsRectangle extent;
132 QFuture<QByteArray> future;
133 QElapsedTimer timer;
134 };
135
136 QHash<QFutureWatcher<QByteArray>*, JobData> mJobs;
137
138 void lazyLoadDtmCoarseData( int res, const QgsRectangle &rect );
139 mutable QMutex mLazyLoadDtmCoarseDataMutex;
141 QByteArray mDtmCoarseData;
142
143 QgsCoordinateTransformContext mTransformContext;
144};
145
147
148#endif // QGSDEMTERRAINTILELOADER_P_H
Contains information about the context in which a coordinate transform is executed.
Base class for raster data providers.
Represents a raster layer.
A rectangle specified with double values.
Definition: qgsrectangle.h:42