QGIS API Documentation 3.32.0-Lima (311a8cb8a6)
qgslinematerial_p.cpp
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1/***************************************************************************
2 qgslinematerial_p.cpp
3 --------------------------------------
4 Date : Apr 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#include "qgslinematerial_p.h"
17
18#include <QColor>
19#include <QSizeF>
20#include <QUrl>
21#include <QVector3D>
22
23#include <Qt3DRender/QBlendEquation>
24#include <Qt3DRender/QBlendEquationArguments>
25#include <Qt3DRender/QCamera>
26#include <Qt3DRender/QEffect>
27#include <Qt3DRender/QGraphicsApiFilter>
28#include <Qt3DRender/QParameter>
29#include <Qt3DRender/QRenderPass>
30#include <Qt3DRender/QTechnique>
31
33
34
35QgsLineMaterial::QgsLineMaterial()
36 : mParameterThickness( new Qt3DRender::QParameter( "THICKNESS", 10, this ) )
37 , mParameterMiterLimit( new Qt3DRender::QParameter( "MITER_LIMIT", -1, this ) ) // 0.75
38 , mParameterLineColor( new Qt3DRender::QParameter( "lineColor", QColor( 0, 255, 0 ), this ) )
39 , mParameterWindowScale( new Qt3DRender::QParameter( "WIN_SCALE", QSizeF(), this ) )
40{
41 addParameter( mParameterThickness );
42 addParameter( mParameterMiterLimit );
43 addParameter( mParameterLineColor );
44 addParameter( mParameterWindowScale );
45
46 //Parameter { name: "tex0"; value: txt },
47 //Parameter { name: "useTex"; value: false },
48
49 Qt3DRender::QShaderProgram *shaderProgram = new Qt3DRender::QShaderProgram( this );
50 shaderProgram->setVertexShaderCode( Qt3DRender::QShaderProgram::loadSource( QUrl( QStringLiteral( "qrc:/shaders/lines.vert" ) ) ) );
51 shaderProgram->setFragmentShaderCode( Qt3DRender::QShaderProgram::loadSource( QUrl( QStringLiteral( "qrc:/shaders/lines.frag" ) ) ) );
52 shaderProgram->setGeometryShaderCode( Qt3DRender::QShaderProgram::loadSource( QUrl( QStringLiteral( "qrc:/shaders/lines.geom" ) ) ) );
53
54 Qt3DRender::QBlendEquation *blendEquation = new Qt3DRender::QBlendEquation( this );
55 blendEquation->setBlendFunction( Qt3DRender::QBlendEquation::Add );
56
57 Qt3DRender::QBlendEquationArguments *blendEquationArgs = new Qt3DRender::QBlendEquationArguments( this );
58 blendEquationArgs->setSourceRgb( Qt3DRender::QBlendEquationArguments::SourceAlpha );
59 blendEquationArgs->setDestinationRgb( Qt3DRender::QBlendEquationArguments::OneMinusSourceAlpha );
60
61 Qt3DRender::QRenderPass *renderPass = new Qt3DRender::QRenderPass( this );
62 renderPass->setShaderProgram( shaderProgram );
63 renderPass->addRenderState( blendEquation );
64 renderPass->addRenderState( blendEquationArgs );
65
66 // without this filter the default forward renderer would not render this
67 Qt3DRender::QFilterKey *filterKey = new Qt3DRender::QFilterKey;
68 filterKey->setName( QStringLiteral( "renderingStyle" ) );
69 filterKey->setValue( "forward" );
70
71 Qt3DRender::QTechnique *technique = new Qt3DRender::QTechnique;
72 technique->addFilterKey( filterKey );
73 technique->addRenderPass( renderPass );
74 technique->graphicsApiFilter()->setApi( Qt3DRender::QGraphicsApiFilter::OpenGL );
75 technique->graphicsApiFilter()->setProfile( Qt3DRender::QGraphicsApiFilter::CoreProfile );
76 technique->graphicsApiFilter()->setMajorVersion( 3 );
77 technique->graphicsApiFilter()->setMinorVersion( 1 );
78
79 Qt3DRender::QEffect *effect = new Qt3DRender::QEffect( this );
80 effect->addTechnique( technique );
81
82 setEffect( effect );
83}
84
85void QgsLineMaterial::setLineColor( const QColor &color )
86{
87 mParameterLineColor->setValue( color );
88}
89
90QColor QgsLineMaterial::lineColor() const
91{
92 return mParameterLineColor->value().value<QColor>();
93}
94
95void QgsLineMaterial::setLineWidth( float width )
96{
97 mParameterThickness->setValue( width );
98}
99
100float QgsLineMaterial::lineWidth() const
101{
102 return mParameterThickness->value().toFloat();
103}
104
105void QgsLineMaterial::setViewportSize( const QSizeF &viewportSize )
106{
107 mParameterWindowScale->setValue( viewportSize );
108}
109