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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia 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 Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "guidecircle.h"
static float PI2 = 2*3.1415f;
GuideCircle::GuideCircle(const QRectF &rect, float startAngle, float span, DIRECTION dir, Guide *follows) : Guide(follows)
{
this->radiusX = rect.width() / 2.0;
this->radiusY = rect.height() / 2.0;
this->posX = rect.topLeft().x();
this->posY = rect.topLeft().y();
this->spanRad = span * PI2 / -360.0;
if (dir == CCW){
this->startAngleRad = startAngle * PI2 / -360.0;
this->endAngleRad = startAngleRad + spanRad;
this->stepAngleRad = this->spanRad / this->length();
}
else{
this->startAngleRad = spanRad + (startAngle * PI2 / -360.0);
this->endAngleRad = startAngle * PI2 / -360.0;
this->stepAngleRad = -this->spanRad / this->length();
}
}
float GuideCircle::length()
{
return qAbs(this->radiusX * spanRad);
}
QPointF GuideCircle::startPos()
{
return QPointF((posX + radiusX + radiusX * cos(startAngleRad)) * scaleX,
(posY + radiusY + radiusY * sin(startAngleRad)) * scaleY);
}
QPointF GuideCircle::endPos()
{
return QPointF((posX + radiusX + radiusX * cos(endAngleRad)) * scaleX,
(posY + radiusY + radiusY * sin(endAngleRad)) * scaleY);
}
void GuideCircle::guide(DemoItem *item, float moveSpeed)
{
float frame = item->guideFrame - this->startLength;
QPointF end((posX + radiusX + radiusX * cos(startAngleRad + (frame * stepAngleRad))) * scaleX,
(posY + radiusY + radiusY * sin(startAngleRad + (frame * stepAngleRad))) * scaleY);
this->move(item, end, moveSpeed);
}
|
