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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QML Presentation System.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Digia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
import QtQuick 2.0
ShaderEffect {
id: shader
width: 400
height: 300
property real speed: 1
property color d: Qt.rgba(Math.random() * 0.7,
Math.random() * 0.5,
Math.random() * 0.7,
Math.random() * 0.5)
property real tx
NumberAnimation on tx { from: 0; to: Math.PI * 2; duration: (Math.random() * 30 + 30) * 1000 / speed; loops: Animation.Infinite }
property real ty
NumberAnimation on ty { from: 0; to: Math.PI * 2; duration: (Math.random() * 30 + 30) * 1000 / speed; loops: Animation.Infinite }
property real tz
NumberAnimation on tz { from: 0; to: Math.PI * 2; duration: (Math.random() * 30 + 30) * 1000 / speed; loops: Animation.Infinite }
property real tw
NumberAnimation on tw { from: 0; to: Math.PI * 2; duration: (Math.random() * 30 + 30) * 1000 / speed; loops: Animation.Infinite }
property real amplitude: height / 2
property variant colorTable: ShaderEffectSource { sourceItem: Rectangle { width: 4; height: 4; color: "steelblue" } }
fragmentShader: "
uniform lowp float qt_Opacity;
uniform lowp sampler2D colorTable;
varying highp vec2 qt_TexCoord0;
void main() {
gl_FragColor = texture2D(colorTable, qt_TexCoord0);
gl_FragColor.w *= qt_Opacity;
}
"
vertexShader: "
uniform lowp vec4 d;
uniform highp float tx;
uniform highp float ty;
uniform highp float tz;
uniform highp float tw;
uniform highp float amplitude;
uniform highp mat4 qt_Matrix;
attribute highp vec4 qt_Vertex;
attribute highp vec2 qt_MultiTexCoord0;
varying highp vec2 qt_TexCoord0;
void main() {
highp vec4 pos = qt_Vertex;
highp float y1 = sin(tx + d.x * qt_MultiTexCoord0.x * 17. + 2. * d.y) + sin(ty + d.z * qt_MultiTexCoord0.x * 11. + 5. * d.w);
highp float y2 = sin(tz + d.w * qt_MultiTexCoord0.x * 7. + 3. * d.z) + sin(tw + d.y * qt_MultiTexCoord0.x * 19. + 3. * d.x);
pos.y += mix(y1, y2, qt_MultiTexCoord0.y) * amplitude * 0.5;
gl_Position = qt_Matrix * pos;
qt_TexCoord0 = qt_MultiTexCoord0;
}
"
mesh: GridMesh { resolution: Qt.size(width / 10, 4) }
}
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