QGIS API Documentation  3.26.3-Buenos Aires (65e4edfdad)
qgsrubberband3d.cpp
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1 /***************************************************************************
2  qgsrubberband3d.cpp
3  --------------------------------------
4  Date : June 2021
5  Copyright : (C) 2021 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 #include "qgsrubberband3d.h"
17 
18 #include "qgscameracontroller.h"
19 #include "qgslinevertexdata_p.h"
21 #include "qgslinematerial_p.h"
23 
24 #include "qgslinestring.h"
25 
26 #include <Qt3DCore/QEntity>
27 #include <Qt3DRender/QAttribute>
28 #include <Qt3DRender/QBuffer>
29 #include <Qt3DRender/QGeometry>
30 #include <Qt3DRender/QGeometryRenderer>
31 #include <Qt3DRender/QMaterial>
32 
33 
35 
36 
37 QgsRubberBand3D::QgsRubberBand3D( Qgs3DMapSettings &map, QgsCameraController *cameraController, Qt3DCore::QEntity *parentEntity )
38 {
39  mMapSettings = &map;
40 
41  mEntity = new Qt3DCore::QEntity( parentEntity );
42 
43  QgsLineVertexData dummyLineData;
44  mGeometry = dummyLineData.createGeometry( mEntity );
45 
46  Q_ASSERT( mGeometry->attributes().count() == 2 );
47  mPositionAttribute = mGeometry->attributes()[0];
48  mIndexAttribute = mGeometry->attributes()[1];
49 
50  mGeomRenderer = new Qt3DRender::QGeometryRenderer;
51  mGeomRenderer->setPrimitiveType( Qt3DRender::QGeometryRenderer::LineStripAdjacency );
52  mGeomRenderer->setGeometry( mGeometry );
53  mGeomRenderer->setPrimitiveRestartEnabled( true );
54  mGeomRenderer->setRestartIndexValue( 0 );
55 
56  mEntity->addComponent( mGeomRenderer );
57 
58  mLineMaterial = new QgsLineMaterial;
59  mLineMaterial->setLineWidth( 3 );
60  mLineMaterial->setLineColor( Qt::red );
61 
62  QObject::connect( cameraController, &QgsCameraController::viewportChanged, mLineMaterial, [this, cameraController]
63  {
64  mLineMaterial->setViewportSize( cameraController->viewport().size() );
65  } );
66  mLineMaterial->setViewportSize( cameraController->viewport().size() );
67 
68  mEntity->addComponent( mLineMaterial );
69 }
70 
71 QgsRubberBand3D::~QgsRubberBand3D()
72 {
73  delete mEntity;
74 }
75 
76 float QgsRubberBand3D::width() const
77 {
78  return mLineMaterial->lineWidth();
79 }
80 
81 void QgsRubberBand3D::setWidth( float width )
82 {
83  mLineMaterial->setLineWidth( width );
84 }
85 
86 QColor QgsRubberBand3D::color() const
87 {
88  return mLineMaterial->lineColor();
89 }
90 
91 void QgsRubberBand3D::setColor( QColor color )
92 {
93  mLineMaterial->setLineColor( color );
94 }
95 
96 void QgsRubberBand3D::reset()
97 {
98  mLineString.clear();
99  updateGeometry();
100 }
101 
102 void QgsRubberBand3D::addPoint( const QgsPoint &pt )
103 {
104  mLineString.addVertex( pt );
105  updateGeometry();
106 }
107 
108 void QgsRubberBand3D::removeLastPoint()
109 {
110  const int lastVertexIndex = mLineString.numPoints() - 1;
111  mLineString.deleteVertex( QgsVertexId( 0, 0, lastVertexIndex ) );
112  updateGeometry();
113 }
114 
115 void QgsRubberBand3D::updateGeometry()
116 {
117  QgsLineVertexData lineData;
118  lineData.withAdjacency = true;
119  lineData.init( Qgis::AltitudeClamping::Absolute, Qgis::AltitudeBinding::Vertex, 0, mMapSettings );
120  lineData.addLineString( mLineString );
121 
122  mPositionAttribute->buffer()->setData( lineData.createVertexBuffer() );
123  mIndexAttribute->buffer()->setData( lineData.createIndexBuffer() );
124  mGeomRenderer->setVertexCount( lineData.indexes.count() );
125 }
126 
Qgis::AltitudeBinding::Vertex
@ Vertex
Clamp every vertex of feature.
qgslinestring.h
QgsPoint
Point geometry type, with support for z-dimension and m-values.
Definition: qgspoint.h:48
qgslinematerial_p.h
qgsabstractmaterialsettings.h
QgsCameraController::viewportChanged
void viewportChanged()
Emitted when viewport rectangle has been updated.
qgsrubberband3d.h
QgsCameraController::viewport
QRect viewport
Definition: qgscameracontroller.h:65
Qgs3DMapSettings
Definition of the world.
Definition: qgs3dmapsettings.h:57
qgscameracontroller.h
QgsVertexId
Utility class for identifying a unique vertex within a geometry.
Definition: qgsvertexid.h:30
QgsCameraController
Object that controls camera movement based on user input.
Definition: qgscameracontroller.h:61
Qgis::AltitudeClamping::Absolute
@ Absolute
Elevation is taken directly from feature and is independent of terrain height (final elevation = feat...
qgsphongmaterialsettings.h
qgslinevertexdata_p.h