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#include "mouse.h"#include <QGraphicsScene>#include <QPainter>#include <QStyleOption>#include <math.h>staticconstdouble Pi =3.14159265358979323846264338327950288419717;
staticdouble TwoPi =2.0* Pi;
staticqreal normalizeAngle(qreal angle)
{
while (angle <0)
angle += TwoPi;
while (angle > TwoPi)
angle -= TwoPi;
return angle;
}
Mouse::Mouse()
: angle(0), speed(0), mouseEyeDirection(0),
color(qrand() %256, qrand() %256, qrand() %256)
{
setRotation(qrand() % (360*16));
}
QRectF Mouse::boundingRect() const
{
qreal adjust =0.5;
returnQRectF(-18- adjust,-22- adjust,36+ adjust,60+ adjust);
}
QPainterPath Mouse::shape() const
{
QPainterPath path;
path.addRect(-10,-20,20,40);
return path;
}
void Mouse::paint(QPainter*painter,constQStyleOptionGraphicsItem*,QWidget*)
{
// Body
painter->setBrush(color);
painter->drawEllipse(-10,-20,20,40);
// Eyes
painter->setBrush(Qt::white);
painter->drawEllipse(-10,-17,8,8);
painter->drawEllipse(2,-17,8,8);
// Nose
painter->setBrush(Qt::black);
painter->drawEllipse(QRectF(-2,-22,4,4));
// Pupils
painter->drawEllipse(QRectF(-8.0+ mouseEyeDirection,-17,4,4));
painter->drawEllipse(QRectF(4.0+ mouseEyeDirection,-17,4,4));
// Ears
painter->setBrush(scene()->collidingItems(this).isEmpty() ?Qt::darkYellow : Qt::red);
painter->drawEllipse(-17,-12,16,16);
painter->drawEllipse(1,-12,16,16);
// TailQPainterPath path(QPointF(0,20));
path.cubicTo(-5,22,-5,22,0,25);
path.cubicTo(5,27,5,32,0,30);
path.cubicTo(-5,32,-5,42,0,35);
painter->setBrush(Qt::NoBrush);
painter->drawPath(path);
}
void Mouse::advance(int step)
{
if (!step)
return;
// Don't move too far awayQLineF lineToCenter(QPointF(0,0), mapFromScene(0,0));
if (lineToCenter.length() >150) {
qreal angleToCenter =::acos(lineToCenter.dx() / lineToCenter.length());
if (lineToCenter.dy() <0)
angleToCenter = TwoPi - angleToCenter;
angleToCenter = normalizeAngle((Pi - angleToCenter) + Pi /2);
if (angleToCenter < Pi && angleToCenter > Pi /4) {
// Rotate left
angle += (angle <-Pi /2) ?0.25 : -0.25;
} elseif (angleToCenter >= Pi && angleToCenter < (Pi + Pi /2+ Pi /4)) {
// Rotate right
angle += (angle < Pi /2) ?0.25 : -0.25;
}
} elseif (::sin(angle) <0) {
angle +=0.25;
} elseif (::sin(angle) >0) {
angle -=0.25;
}
// Try not to crash with any other miceQList<QGraphicsItem*> dangerMice = scene()->items(QPolygonF()
<< mapToScene(0,0)
<< mapToScene(-30,-50)
<< mapToScene(30,-50));
foreach (QGraphicsItem*item, dangerMice) {
if (item ==this)
continue;
QLineF lineToMouse(QPointF(0,0), mapFromItem(item,0,0));
qreal angleToMouse =::acos(lineToMouse.dx() / lineToMouse.length());
if (lineToMouse.dy() <0)
angleToMouse = TwoPi - angleToMouse;
angleToMouse = normalizeAngle((Pi - angleToMouse) + Pi /2);
if (angleToMouse >=0&& angleToMouse < Pi /2) {
// Rotate right
angle +=0.5;
} elseif (angleToMouse <= TwoPi && angleToMouse > (TwoPi - Pi /2)) {
// Rotate left
angle -=0.5;
}
}
// Add some random movementif (dangerMice.size() >1&& (qrand() %10) ==0) {
if (qrand() %1)
angle += (qrand() %100) /500.0;
else
angle -= (qrand() %100) /500.0;
}
speed += (-50+ qrand() %100) /100.0;
qreal dx =::sin(angle) *10;
mouseEyeDirection = (qAbs(dx /5) <1) ?0 : dx /5;
setRotation(rotation() + dx);
setPos(mapToParent(0,-(3+ sin(speed) *3)));
}
