1 /*

     2  * Hedgewars, a free turn based strategy game

     3  * Copyright (c) 2009 Kristian Lehmann <email@thexception.net>

     4  * Copyright (c) 2009-2011 Andrey Korotaev <unC0Rr@gmail.com>

     5  *

     6  * This program is free software; you can redistribute it and/or modify

     7  * it under the terms of the GNU General Public License as published by

     8  * the Free Software Foundation; version 2 of the License

     9  *

    10  * This program is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    13  * GNU General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU General Public License

    16  * along with this program; if not, write to the Free Software

    17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

    18  */

    19 

    20 #include "bgwidget.h"

    21 

    22 SpritePosition::SpritePosition(QWidget * parent, int sh)

    23 {

    24     wParent = parent;

    25     iSpriteHeight = sh;

    26     reset();

    27 }

    28 

    29 SpritePosition::~SpritePosition()

    30 {

    31 }

    32 

    33 void SpritePosition::move()

    34 {

    35     fX += fXMov;

    36     fY += fYMov;

    37     iAngle += 4;

    38     if (iAngle >= 360) iAngle = 0;

    39     if (fY > wParent->height()) reset();

    40 }

    41 

    42 void SpritePosition::reset()

    43 {

    44     fY = -1 * iSpriteHeight;

    45     fX = (qrand() % ((int)(wParent->width() * 1.5))) - wParent->width()/2;

    46     fYMov = ((qrand() % 400)+300) / 100.0f;

    47     fXMov = fYMov * 0.2f+((qrand()%100)/100.0f * 0.6f); //so between 0.2 and 0.6, or 0.5 +/- 0.3

    48     iAngle = qrand() % 360;

    49 }

    50 

    51 QPoint SpritePosition::pos()

    52 {

    53     return QPoint((int)fX,(int)fY);

    54 }

    55 

    56 int SpritePosition::getAngle()

    57 {

    58     return iAngle;

    59 }

    60 

    61 void SpritePosition::init()

    62 {

    63     fY = qrand() % (wParent->height() + 1);

    64     fX = qrand() % (wParent->width() + 1);

    65 }

    66 

    67 BGWidget::BGWidget(QWidget * parent) : QWidget(parent)

    68 {

    69     setAttribute(Qt::WA_NoSystemBackground, true);

    70     sprite.load(":/res/Star.png");

    71 

    72     setAutoFillBackground(false);

    73 

    74     for (int i = 0; i < SPRITE_MAX; i++) spritePositions[i] = new SpritePosition(this, sprite.height());

    75 

    76     for (int i = 0; i < 360; i++)

    77     {

    78         rotatedSprites[i] = new QImage(sprite.width(), sprite.height(), QImage::Format_ARGB32);

    79         rotatedSprites[i]->fill(0);

    80 

    81         QPoint translate(sprite.width()/2, sprite.height()/2);

    82 

    83         QPainter p;

    84         p.begin(rotatedSprites[i]);

    85     //  p.setRenderHint(QPainter::Antialiasing);

    86         p.setRenderHint(QPainter::SmoothPixmapTransform);

    87         p.translate(translate.x(), translate.y());

    88         p.rotate(i);

    89         p.translate(-1*translate.x(), -1*translate.y());

    90         p.drawImage(0, 0, sprite);

    91     }

    92 

    93     timerAnimation = new QTimer();

    94     connect(timerAnimation, SIGNAL(timeout()), this, SLOT(animate()));

    95     timerAnimation->setInterval(ANIMATION_INTERVAL);

    96 }

    97 

    98 BGWidget::~BGWidget()

    99 {

   100     for (int i = 0; i < SPRITE_MAX; i++) delete spritePositions[i];

   101     for (int i = 0; i < 360; i++) delete rotatedSprites[i];

   102     delete timerAnimation;

   103 }

   104 

   105 void BGWidget::paintEvent(QPaintEvent *event)

   106 {

   107     Q_UNUSED(event);

   108 

   109     QPainter p;

   110     p.begin(this);

   111     //p.setRenderHint(QPainter::Antialiasing);

   112     for (int i = 0; i < SPRITE_MAX; i++)

   113     {

   114         QPoint point = spritePositions[i]->pos();

   115         p.drawImage(point.x(), point.y(), *rotatedSprites[spritePositions[i]->getAngle()]);

   116     }

   117     p.end();

   118 }

   119 

   120 void BGWidget::animate()

   121 {

   122     for (int i = 0; i < SPRITE_MAX; i++)

   123     {

   124         // bottom edge of star *seems* clipped, but in fact, if I switch to just plain old repaint()/update() it is still clipped - artifact of transform?  As for 5, is arbitrary number. 4 was noticeably clipping, 5 seemed same as update() - I assume extra room is due to rotation and value really should be calculated proportional to width/height

   125         update(spritePositions[i]->pos().x(),spritePositions[i]->pos().y(), sprite.width()+5, sprite.height()+5);

   126         spritePositions[i]->move();

   127     }

   128 }

   129 

   130 void BGWidget::startAnimation()

   131 {

   132     timerAnimation->start();

   133 }

   134 

   135 void BGWidget::stopAnimation()

   136 {

   137     timerAnimation->stop();

   138 }

   139 

   140 void BGWidget::init()

   141 {

   142     for (int i = 0; i < SPRITE_MAX; i++) spritePositions[i]->init();

   143 }