1 /*

     2  * Hedgewars, a free turn based strategy game

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

     4  *

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

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

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

     8  *

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

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

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

    12  * GNU General Public License for more details.

    13  *

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

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

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

    17  */

    18 

    19 #include "bgwidget.h"

    20 

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

    22 {

    23 	wParent = parent;

    24 	iSpriteHeight = sh;

    25 	reset();

    26 }

    27 

    28 SpritePosition::~SpritePosition()

    29 {

    30 }

    31 

    32 void SpritePosition::move()

    33 {

    34 	fX += fXMov;

    35 	fY += fYMov;

    36 	iAngle += 4;

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

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

    39 }

    40 

    41 void SpritePosition::reset()

    42 {

    43 	fY = -1 * iSpriteHeight;

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

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

    46 	fXMov = fYMov * 0.5f;

    47 	iAngle = qrand() % 360;

    48 }

    49 

    50 QPoint SpritePosition::pos()

    51 {

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

    53 }

    54 

    55 int SpritePosition::getAngle()

    56 {

    57 	return iAngle;

    58 }

    59 

    60 void SpritePosition::init()

    61 {

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

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

    64 }

    65 

    66 BGWidget::BGWidget(QWidget * parent) : QWidget(parent)

    67 {

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

    69 	

    70 	setAutoFillBackground(false);

    71 

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

    73 	

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

    75 	{

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

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

    78 

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

    80 

    81 		QPainter p;

    82 		p.begin(rotatedSprites[i]);

    83 		p.setRenderHint(QPainter::Antialiasing);

    84 		p.setRenderHint(QPainter::SmoothPixmapTransform);

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

    86 		p.rotate(i);

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

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

    89 

    90 	}

    91 

    92 	timerAnimation = new QTimer();

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

    94 	timerAnimation->setInterval(ANIMATION_INTERVAL);

    95 }

    96 

    97 BGWidget::~BGWidget()

    98 {

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

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

   101 	delete timerAnimation;

   102 }

   103 

   104 void BGWidget::paintEvent(QPaintEvent *event)

   105 {

   106 	QPainter p;

   107 	p.begin(this);

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

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

   110 	{

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

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

   113 	}

   114 	p.end();

   115 }

   116 

   117 void BGWidget::animate()

   118 {

   119 	repaint();

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

   121 	{

   122 		spritePositions[i]->move();

   123 	}

   124 }

   125 

   126 void BGWidget::startAnimation()

   127 {

   128 	timerAnimation->start();

   129 }

   130 

   131 void BGWidget::stopAnimation()

   132 {

   133 	timerAnimation->stop();

   134 }

   135 

   136 void BGWidget::init()

   137 {

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

   139 }