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
32 /// @cond PRIVATE
33
34
QgsLineMaterial()35 QgsLineMaterial::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
setLineColor(const QColor & color)85 void QgsLineMaterial::setLineColor( const QColor &color )
86 {
87 mParameterLineColor->setValue( color );
88 }
89
lineColor() const90 QColor QgsLineMaterial::lineColor() const
91 {
92 return mParameterLineColor->value().value<QColor>();
93 }
94
setLineWidth(float width)95 void QgsLineMaterial::setLineWidth( float width )
96 {
97 mParameterThickness->setValue( width );
98 }
99
lineWidth() const100 float QgsLineMaterial::lineWidth() const
101 {
102 return mParameterThickness->value().toFloat();
103 }
104
setViewportSize(const QSizeF & viewportSize)105 void QgsLineMaterial::setViewportSize( const QSizeF &viewportSize )
106 {
107 mParameterWindowScale->setValue( viewportSize );
108 }
109
110 /// @endcond
111