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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt 5 launch demo.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
import QtQuick 2.0
import "presentation"
Slide {
id: slide
title: "Qt Quick - ShaderEffect"
writeInText: "Harness the raw power of the graphics processor. The ShaderEffect\nelement lets you write GLSL inline in your QML files."
Image {
id: sourceItem
source: "images/ally.png"
visible: false
}
SequentialAnimation {
id: kickoffAnimation
// setup
PropertyAction { target: rotationAnimation; property: "running"; value: false }
PropertyAction { target: timeAnimation; property: "running"; value: false }
PropertyAction { target: shader; property: "amp"; value: 0 }
PropertyAction { target: shader; property: "xrot"; value: 0 }
PropertyAction { target: shader; property: "zrot"; value: 0 }
PropertyAction { target: shader; property: "time"; value: 0 }
PropertyAction { target: shader; property: "scale"; value: 1; }
PropertyAction { target: rotationAnimation; property: "running"; value: false }
PropertyAction { target: timeAnimation; property: "running"; value: false }
// short pause
PauseAnimation { duration: 2000 }
// get started...
ParallelAnimation {
NumberAnimation { target: shader; property: "xrot"; to: 2 * Math.PI / 8; duration: 1000; easing.type: Easing.InOutCubic }
NumberAnimation { target: shader; property: "amp"; to: 0.1; duration: 1000; easing.type: Easing.InOutCubic }
// NumberAnimation { target: shader; property: "scale"; to: 1.5; duration: 1000; easing.type: Easing.InOutCubic }
PropertyAction { target: rotationAnimation; property: "running"; value: true }
PropertyAction { target: timeAnimation; property: "running"; value: true }
}
running: slide.visible;
}
ShaderEffect {
id: shader
width: height
height: parent.height
anchors.centerIn: parent;
anchors.verticalCenterOffset: slide.height * 0.1
blending: true
mesh: "50x50"
property variant size: Qt.size(width, height);
property variant source: sourceItem;
property real amp: 0
property real xrot: 0; // 2 * Math.PI / 8;
// NumberAnimation on xrot { from: 0; to: Math.PI * 2; duration: 3000; loops: Animation.Infinite }
property real zrot: 0
NumberAnimation on zrot {
id: rotationAnimation
from: 0;
to: Math.PI * 2;
duration: 20000;
loops: Animation.Infinite
easing.type: Easing.InOutCubic
running: false;
}
property real time: 0
NumberAnimation on time {
id: timeAnimation
from: 0;
to: Math.PI * 2;
duration: 3457;
loops: Animation.Infinite
running: false;
}
vertexShader: "
attribute highp vec4 qt_Vertex;
attribute highp vec2 qt_MultiTexCoord0;
uniform highp mat4 qt_Matrix;
uniform highp float xrot;
uniform highp float zrot;
uniform highp vec2 size;
uniform highp float time;
uniform highp float amp;
varying lowp vec2 v_TexCoord;
varying lowp float v_light;
void main() {
highp float xcosa = cos(xrot);
highp float xsina = sin(xrot);
highp mat4 xrot = mat4(1, 0, 0, 0,
0, xcosa, xsina, 0,
0, -xsina, xcosa, 0,
0, 0, 0, 1);
highp float zcosa = cos(zrot);
highp float zsina = sin(zrot);
highp mat4 zrot = mat4(zcosa, zsina, 0, 0,
-zsina, zcosa, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1);
highp float near = 2.;
highp float far = 6.;
highp float fmn = far - near;
highp mat4 proj = mat4(near, 0, 0, 0,
0, near, 0, 0,
0, 0, -(far + near) / fmn, -1.,
0, 0, -2. * far * near / fmn, 1);
highp mat4 model = mat4(2, 0, 0, 0,
0, 2, 0, 0,
0, 0, 2, 0,
0, -.5, -4, 1);
vec4 nLocPos = vec4(qt_Vertex.xy * 2.0 / size - 1.0, 0, 1);
nLocPos.z = cos(nLocPos.x * 5. + time) * amp;
vec4 pos = proj * model * xrot * zrot * nLocPos;
pos = vec4(pos.xyx/pos.w, 1);
gl_Position = qt_Matrix * vec4((pos.xy + 1.0) / 2.0 * size , 0, 1);
v_TexCoord = qt_MultiTexCoord0;
v_light = dot(normalize(vec3(-sin(nLocPos.x * 5.0 + time) * 5.0 * amp, 0, -1)), vec3(0, 0, -1));
}
"
fragmentShader: "
uniform lowp sampler2D source;
uniform lowp float qt_Opacity;
varying highp vec2 v_TexCoord;
varying lowp float v_light;
void main() {
highp vec4 c = texture2D(source, v_TexCoord);
gl_FragColor = (vec4(pow(v_light, 16.0)) * 0.3 + c) * qt_Opacity;
}
"
}
}
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