QGIS API Documentation 3.27.0-Master (c6eca784ad)
qgsmeshvectorrenderer.h
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1/***************************************************************************
2 qgsmeshvectorrenderer.h
3 -------------------
4 begin : May 2018
5 copyright : (C) 2018 by Peter Petrik
6 email : zilolv at gmail dot com
7 ***************************************************************************/
8
9/***************************************************************************
10 * *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
15 * *
16 ***************************************************************************/
17
18#ifndef QGSMESHVECTORRENDERER_H
19#define QGSMESHVECTORRENDERER_H
20
21
22#define SIP_NO_FILE
23
24#include <QVector>
25#include <QSize>
26
27#include "qgis_core.h"
28#include "qgsmeshdataprovider.h"
29#include "qgstriangularmesh.h"
30#include "qgsmeshlayer.h"
31#include "qgspointxy.h"
32
36
37
38class QgsMeshVectorRenderer
39{
40 public:
42 QgsMeshVectorRenderer() = default;
43
47 virtual ~QgsMeshVectorRenderer();
48
49 virtual void draw() = 0;
50
52 static QgsMeshVectorRenderer *makeVectorRenderer( const QgsTriangularMesh &m,
53 const QgsMeshDataBlock &datasetVectorValues,
54 const QgsMeshDataBlock &scalarActiveFaceFlagValues,
55 const QVector<double> &datasetValuesMag,
56 double datasetMagMaximumValue,
57 double datasetMagMinimumValue,
59 const QgsMeshRendererVectorSettings &settings,
60 QgsRenderContext &context,
61 const QgsRectangle &layerExtent,
62 QSize size );
63};
64
73class QgsMeshVectorArrowRenderer : public QgsMeshVectorRenderer
74{
75 public:
77 QgsMeshVectorArrowRenderer( const QgsTriangularMesh &m,
78 const QgsMeshDataBlock &datasetValues,
79 const QVector<double> &datasetValuesMag,
80 double datasetMagMaximumValue,
81 double datasetMagMinimumValue,
83 const QgsMeshRendererVectorSettings &settings,
84 QgsRenderContext &context,
85 QSize size );
87 ~QgsMeshVectorArrowRenderer() override;
88
92 void draw() override;
93
94 private:
96 void drawVectorDataOnVertices( );
98 void drawVectorDataOnFaces( );
100 void drawVectorDataOnEdges( );
102 void drawVectorDataOnPoints( const QSet<int> indexesToRender, const QVector<QgsMeshVertex> &points );
104 void drawVectorDataOnGrid( );
106 void drawVectorArrow( const QgsPointXY &lineStart, double xVal, double yVal, double magnitude );
108 bool calcVectorLineEnd( QgsPointXY &lineEnd,
109 double &vectorLength,
110 double &cosAlpha,
111 double &sinAlpha, //out
112 const QgsPointXY &lineStart,
113 double xVal,
114 double yVal,
115 double magnitude //in
116 );
117
124 double calcExtentBufferSize() const;
125
126 const QgsTriangularMesh &mTriangularMesh;
127 const QgsMeshDataBlock &mDatasetValues;
128 const QVector<double> &mDatasetValuesMag; //magnitudes
129 double mMinMag = 0.0;
130 double mMaxMag = 0.0;
131 QgsRenderContext &mContext;
133 QgsMeshDatasetGroupMetadata::DataType mDataType = QgsMeshDatasetGroupMetadata::DataType::DataOnVertices;
134 QSize mOutputSize;
135 QgsRectangle mBufferedExtent;
136 QPen mPen;
137
138 QgsInterpolatedLineColor mVectorColoring;
139
140};
141
142
143
145
146
147
148#endif // QGSMESHVECTORRENDERER_H
Class defining color to render mesh datasets.
QgsMeshDataBlock is a block of integers/doubles that can be used to retrieve: active flags (e....
DataType
Location of where data is specified for datasets in the dataset group.
Represents a renderer settings for vector datasets.
A class to represent a 2D point.
Definition: qgspointxy.h:59
A rectangle specified with double values.
Definition: qgsrectangle.h:42
Contains information about the context of a rendering operation.
Triangular/Derived Mesh is mesh with vertices in map coordinates.