Nainosaur/ground.cpp at main · HuagoSR/Nainosaur · GitHub

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#include "ground.h"


Ground::Ground(QQueue<Ground*> &container, qreal x, qreal y, qreal max_length, qreal speed, QObject* parent)
    : QObject{ parent }, m_speed(speed)
{
	// 生成 [0, 100) 之间的随机整数
	int r = QRandomGenerator::global()->bounded(100);
	// 由随机数决定地面种类
    // 如果当前无地面/最后的地面为斜向的，则必须生成平直地面
    if (r < 80||container.isEmpty()||container.back()->m_endPoint.y()!=container.back()->m_startPoint.y()) // 正常地面
	{
		m_startPoint = QPointF(x, y);
		double percent = QRandomGenerator::global()->generateDouble();
		m_endPoint = QPointF(x + (0.4 * percent + 0.6) * max_length, y);
        container.enqueue(this);
	}
	else // 凹陷或突出地面
    {
        //随机百分数
        double percent = QRandomGenerator::global()->generateDouble();
        //maxLength需要缩小，以确保凹陷/突出长度较小
        max_length=50;
        //Y方向偏移量
        int offset = QRandomGenerator::global()->bounded(-10, 10);
        //偏移区间长度（偏移地面+斜坡*2）
        qreal len = max_length*(0.4 * percent + 0.6);
        //斜坡X方向长度：offset*0.5~offset*1.5=5~15
        qreal rampX=abs((0.5+percent)*offset);      //offset为负？所以需要ABS
        //偏移地面长度
        qreal groundLen=len-2*rampX;
        //斜坡1
        Ground* ramp1=new Ground(QPointF(x,y),QPointF(x+rampX,y+offset),speed);
        container.enqueue(ramp1);
        //偏移地面(自己)
        this->setStartPoint(QPointF(x+rampX,y+offset));
        this->setEndPoint(QPointF(x+rampX+groundLen,y+offset));
        container.enqueue(this);
        //斜坡2
        Ground* ramp2=new Ground(QPointF(x+rampX+groundLen,y+offset),QPointF(x+len,y),speed);
        container.enqueue(ramp2);
	}
}

Ground::Ground(QPointF start, QPointF end, qreal speed, QObject *parent)
    :QObject{ parent },m_startPoint(start),m_endPoint(end),m_speed(speed)
{

}


void Ground::setStartPoint(const QPointF& p)
{
	m_startPoint = p;
}

void Ground::setEndPoint(const QPointF& p)
{
	m_endPoint = p;
}

QPointF Ground::startPoint() const
{
	return m_startPoint;
}

QPointF Ground::endPoint() const
{
	return m_endPoint;
}

void Ground::setSpeed(const qreal s)
{
    m_speed=s;
}

qreal Ground::speed() const
{
    return m_speed;
}


void Ground::shift()
{
	m_startPoint.rx() -= m_speed;
	m_endPoint.rx() -= m_speed;
}

void Ground::paintGround(QPainter& painter)
{
	painter.drawLine(m_startPoint, m_endPoint);
	//qreal width=m_endPoint.x()-m_startPoint.x();
	//painter.drawRect(m_startPoint.x(),m_startPoint.y(),width,1000);
}