Qt Quick 3D - 自定义着色器示例

CustomMaterial {
    id: root
    property real time: 0.0
    property real amplitude: 5.0
    property real alpha: 1.0

    property bool texturing: false
    property bool textureFromItem: false
    property Item texSrc
    Texture {
        id: texFromFile
        source: "qt_logo.png"
    }
    Texture {
        id: texFromItem
        sourceItem: root.texSrc
    }
    property TextureInput tex: TextureInput {
        enabled: root.texturing
        texture: root.textureFromItem ? texFromItem : texFromFile
    }

    shadingMode: CustomMaterial.Unshaded
    sourceBlend: root.alpha < 1.0 ? CustomMaterial.SrcAlpha : CustomMaterial.NoBlend
    destinationBlend: root.alpha < 1.0 ? CustomMaterial.OneMinusSrcAlpha : CustomMaterial.NoBlend
    cullMode: CustomMaterial.BackFaceCulling

    vertexShader: "example.vert"
    fragmentShader: root.texturing ? "example_tex.frag" : "example.frag"
}

Model {
    position: Qt.vector3d(0, 0, 0)
    NumberAnimation on eulerRotation.y {
        from: 0
        to: 360
        duration: 3000
        loops: -1
        running: control.animateRotation
    }
    scale: Qt.vector3d(2, 2, 2)
    source: "#Sphere"
    materials: [
        ExampleMaterial {
            id: exampleMaterial
            time: control.time
            amplitude: control.amplitude
            alpha: control.alpha
            texturing: control.texturing
            textureFromItem: control.textureFromItem
            texSrc: Rectangle {
                layer.enabled: true
                layer.textureMirroring: ShaderEffectSource.NoMirroring
                visible: false
                SequentialAnimation on color {
                    ColorAnimation { from: "black"; to: "yellow"; duration: 2000 }
                    ColorAnimation { from: "yellow"; to: "cyan"; duration: 1000 }
                    ColorAnimation { from: "cyan"; to: "black"; duration: 500 }
                    loops: -1
                }
                width: 512
                height: 512
                Image {
                    source: "qt_logo.png"
                    anchors.centerIn: parent
                }
            }
        }
    ]
}