imagecolors.qml Example File | Qt Quick 5.12.11

- Qt 5.12
- Qt Quick
- Qt Quick Particles Examples - CustomParticle
- imagecolors.qml Example File
- Qt 5.12.11 Reference Documentation

# imagecolors.qml Example File

particles/customparticle/content/imagecolors.qml

     /****************************************************************************
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     import QtQuick 2.0
     import QtQuick.Particles 2.0

     Rectangle {
         width: 400
         height: 400
         Rectangle {
             id: root
             color: "white"
             width: 310
             height: 300
             anchors.centerIn: parent
             ParticleSystem { id: sys }
             CustomParticle {
                 system: sys
                 property real maxWidth: root.width
                 property real maxHeight: root.height
                 ShaderEffectSource {
                     id: pictureSource
                     sourceItem: picture
                     hideSource: true
                 }
                 Image {
                     id: picture
                     source: "../../images/starfish_3.png"
                 }
                 ShaderEffectSource {
                     id: particleSource
                     sourceItem: particle
                     hideSource: true
                 }
                 Image {
                     id: particle
                     source: "qrc:///particleresources/fuzzydot.png"
                 }
                 vertexShader:"
                     uniform highp float maxWidth;
                     uniform highp float maxHeight;
                     varying highp vec2 fTex2;
                     varying lowp float fFade;
                     uniform lowp float qt_Opacity;

                     void main() {

                         fTex2 = vec2(qt_ParticlePos.x, qt_ParticlePos.y);
                         //Uncomment this next line for each particle to use full texture, instead of the solid color at the center of the particle.
                         //fTex2 = fTex2 + ((- qt_ParticleData.z / 2. + qt_ParticleData.z) * qt_ParticleTex); //Adjusts size so it's like a chunk of image.
                         fTex2 = fTex2 / vec2(maxWidth, maxHeight);
                         highp float t = (qt_Timestamp - qt_ParticleData.x) / qt_ParticleData.y;
                         fFade = min(t*4., (1.-t*t)*.75) * qt_Opacity;
                         defaultMain();
                     }
                 "
                 property variant particleTexture: particleSource
                 property variant pictureTexture: pictureSource
                 fragmentShader: "
                     uniform sampler2D particleTexture;
                     uniform sampler2D pictureTexture;
                     varying highp vec2 qt_TexCoord0;
                     varying highp vec2 fTex2;
                     varying lowp float fFade;
                     void main() {
                         gl_FragColor = texture2D(pictureTexture, fTex2) * texture2D(particleTexture, qt_TexCoord0).w * fFade;
                 }"
             }

             Emitter {
                 id: emitter
                 system: sys
                 enabled: false
                 lifeSpan: 8000
                 maximumEmitted: 4000
                 anchors.fill: parent
                 size: 16
                 acceleration: PointDirection { xVariation: 12; yVariation: 12 }
             }
             MouseArea {
                 anchors.fill: parent
                 onClicked: emitter.burst(4000);
             }
         }
     }