1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/****************************************************************************
**
** Copyright (C) 2023 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQuick module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#version 120
attribute highp vec2 qt_ParticlePos;
attribute highp vec2 qt_ParticleTex;
attribute highp vec4 qt_ParticleData; // x = time, y = lifeSpan, z = size, w = endSize
attribute highp vec4 qt_ParticleVec; // x,y = constant velocity, z,w = acceleration
attribute highp float qt_ParticleR;
uniform highp mat4 qt_Matrix;
uniform highp float qt_Timestamp;
varying highp vec2 qt_TexCoord0;
void defaultMain()
{
qt_TexCoord0 = qt_ParticleTex;
highp float size = qt_ParticleData.z;
highp float endSize = qt_ParticleData.w;
highp float t = (qt_Timestamp - qt_ParticleData.x) / qt_ParticleData.y;
highp float currentSize = mix(size, endSize, t * t);
if (t < 0. || t > 1.)
currentSize = 0.;
highp vec2 pos = qt_ParticlePos
- currentSize / 2. + currentSize * qt_ParticleTex // adjust size
+ qt_ParticleVec.xy * t * qt_ParticleData.y // apply velocity vector..
+ 0.5 * qt_ParticleVec.zw * pow(t * qt_ParticleData.y, 2.);
gl_Position = qt_Matrix * vec4(pos.x, pos.y, 0, 1);
}
|
