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30 lines
807 B
30 lines
807 B
6 months ago
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#include "expball.h"
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#include "gamewidget.h"
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#include <QtMath>
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ExpBall::ExpBall(int _value, QPointF _pos)
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{
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expValue = _value;
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this->setPixmap(QPixmap(":/icons/img/expball.png"));
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this->setScale(0.1);
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this->setPos(_pos);
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moveSpeed = 5;
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}
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void ExpBall::expBallMove()
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{
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QPointF playerPos = GameWidget::widget->getPlayer()->getCenterPos();
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QPointF moveDir = playerPos - this->getCenterPos();
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qreal _x = moveDir.x();
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qreal _y = moveDir.y();
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_x = QString::number(_x,'f',2).toDouble();
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_y = QString::number(_y,'f',2).toDouble();
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qreal _r = qSqrt(qPow(_x,2) + qPow(_y,2));
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if(_r == 0) return;
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//保留两位小数
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_r = QString::number(_r,'f',2).toDouble();
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qreal vx = _x/_r * moveSpeed;
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qreal vy = _y/_r * moveSpeed;
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this->moveBy(vx,vy);
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}
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