83 lines
1.7 KiB
C++
83 lines
1.7 KiB
C++
#include "cars.h"
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Cars::Cars(QGraphicsItem *parent, int dir, Cars::Color color) : QGraphicsPixmapItem(parent)
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{
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m_pos = this->pos();
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this->setRotation(dir);
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if(color==RANDOM)
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color = Cars::Color(rand()%3); //车身颜色一定是确定的
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m_color = color;
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switch (m_color) {
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case Pink:
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m_pic = QPixmap(":/cars/pink");
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break;
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case Red:
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m_pic = QPixmap(":/cars/red");
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break;
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case Yellow:
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m_pic = QPixmap(":/cars/yellow");
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break;
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default:
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m_pic = QPixmap(":/cars/red");
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break;
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}
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m_pic = m_pic.scaled(M_WID, M_LEN);
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this->setPixmap(m_pic);
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setTransformOriginPoint(M_WID/2, M_LEN/2); //设置旋转中心
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}
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void Cars::Forward(qreal vel)
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{
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qreal ang = qDegreesToRadians(rotation());
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this->moveBy(+vel*qSin(ang), -vel*qCos(ang));
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}
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void Cars::Backward(qreal vel)
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{
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qreal ang = qDegreesToRadians(rotation());
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this->moveBy(-vel*qSin(ang), +vel*qCos(ang));
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}
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void Cars::moveLeft(qreal vel)
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{
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qreal ang = qDegreesToRadians(rotation());
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moveBy(-vel*qCos(ang), -vel*qSin(ang));
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}
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void Cars::moveRight(qreal vel)
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{
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qreal ang = qDegreesToRadians(rotation());
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moveBy(vel*qCos(ang), vel*qSin(ang));
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}
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//ang为旋转角度（弧度），正数为顺时针，负数逆时针
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void Cars::Rotate(qreal ang)
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{
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setRotation(rotation() + ang);
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}
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void Cars::turnLeft(int r, int ang)
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{
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Forward(r*qSin(ang));
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Rotate(-ang);
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moveLeft(r*(1-qCos(ang)));
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}
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void Cars::turnRight(int r, int ang)
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{
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Forward(r*qSin(ang));
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Rotate(ang);
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moveRight(r*(1-qCos(ang)));
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}
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Cars::Color Cars::getColor()
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{
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return this->m_color;
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}
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qreal Cars::getDir()
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{
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return this->rotation();
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}
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