environmentsystem.cpp

#include "environmentsystem.h"


EnvironmentSystem::EnvironmentSystem(QRect r,qreal speed,QObject *parent)
    : QObject{parent},m_rect(r),m_standardSpeed(speed)
{
    m_white=QColor(240,240,240,0);
    m_head=QPixmap(":/images/head_big.png");
}

qreal EnvironmentSystem::standardSpeed() const
{
    return m_standardSpeed;
}

void EnvironmentSystem::setStandardSpeed(const qreal s)
{
    m_standardSpeed=s;
    //更新地板速度
    foreach (Ground* g ,grounds) {
        g->setSpeed(s);
    }
    //更新云朵速度
    foreach (Cloud* c, clouds) {
        c->setSpeed(s);
    }
}

void EnvironmentSystem::reset()
{
    m_white=QColor(240,240,240,0);
}


void EnvironmentSystem::updateGroundsState(qreal y)
{
    removeGrounds();    //删除地面
    addGrounds(y);      //添加地面
}

void EnvironmentSystem::addGrounds(qreal y)
{
    while (!grounds.isEmpty() && grounds.head() == nullptr)
    {
        grounds.dequeue();
    }
    do
    {
        if(grounds.isEmpty())
        {
            Ground *g=new Ground(grounds,rect().right(),y,300,standardSpeed(),this);
        }
        else
        {
            Ground *g=new Ground(grounds,grounds.back()->endPoint().x(),y,300,standardSpeed(),this);
        }
    } while (grounds.back()->endPoint().x() <= 300+m_rect.right());

}

void EnvironmentSystem::removeGrounds()
{
    if(grounds.isEmpty()) return;
    if(grounds.head()==nullptr)
    {
        grounds.dequeue();
        return;
    }
    if(grounds.head()->endPoint().x()<rect().left()-100)
    {
        Ground *g=grounds.dequeue();
        /*if(g->isUneven())
        {
            if(g->ramp[0]!=nullptr)delete g->ramp[0];
            if(g->ramp[1]!=nullptr)delete g->ramp[1];
        }*/
        delete g;
        g=nullptr;
    }
}

void EnvironmentSystem::moveGrounds()
{
    foreach (Ground* g, grounds)
    {
        if (g!=nullptr)
        {
            g->shift();
        }
    }    

}

void EnvironmentSystem::updateCloudState()
{
    removeClouds();
    addClouds();
}

void EnvironmentSystem::addClouds()
{
    if(grounds.empty()) return;
    //云朵不可距离过近
    if(!clouds.isEmpty())
    {
        if(clouds.back()->position().x()>m_rect.width()*0.8)
            return;
    }

    //随机Y坐标
    qreal maxY=grounds.head()->endPoint().y()*0.55;
    qreal minY=grounds.head()->endPoint().y()*0.15;
    double percentY = QRandomGenerator::global()->generateDouble();
    qreal cloudY=minY+(maxY-minY)*percentY;
    //随机X坐标
    double percentX = QRandomGenerator::global()->generateDouble();
    qreal cloudX=m_rect.width()+percentX*m_rect.width()/5;
    QPointF pos(cloudX,cloudY);
    //生成云朵
    Cloud *c=new Cloud(this,m_standardSpeed,pos);
    clouds.enqueue(c);

}

void EnvironmentSystem::removeClouds()
{
    if(clouds.isEmpty()) return;
    if(clouds.head()==nullptr)
    {
        clouds.dequeue();
        return;
    }
    if(clouds.head()->isOut())
    {
        Cloud* c=clouds.dequeue();
        delete c;
        c=nullptr;
        return;
    }
}

void EnvironmentSystem::moveClouds()
{
    foreach (Cloud* c, clouds) {
        c->shift();
    }
}

QColor EnvironmentSystem::white()
{
    return m_white;
}

void EnvironmentSystem::setRect(const QRect &r)
{
    m_rect=r;
}

QRect EnvironmentSystem::rect() const
{
    return m_rect;
}


void EnvironmentSystem::updateMovement()
{
    //地板移动
    moveGrounds();
    //云朵移动
    moveClouds();
}

void EnvironmentSystem::updateState(qreal groundY)
{
    //地面增删
    updateGroundsState(groundY);
    //云朵删增
    updateCloudState();
}

void EnvironmentSystem::paintEnvironment(QPainter &painter)
{
    //绘制地面
    foreach (Ground* g, grounds)
    {
        if(g!=nullptr)  g->paintGround(painter);
    }
    //绘制云朵
    foreach (Cloud* c, clouds) {
        if(c!=nullptr) c->paint(painter);
    }
}

void EnvironmentSystem::paintEnd(QPainter &painter)
{
    //白色背景
    int a=std::min(m_white.alpha()+2,255);
    if(m_white.alpha()<255)
    {
        m_white.setAlpha(a);
    }
    painter.setPen(Qt::NoPen);
    painter.setBrush(m_white);
    painter.drawRect(rect());

    //龙头
    qreal head_x=rect().width()/2-m_head.width()/2;
    qreal head_y=rect().height()/2-m_head.height()/2;
    QPointF headPos(head_x,head_y);
    qreal scale=qreal(a)/255;
    painter.drawPixmap(headPos,m_head.scaled(scale*m_head.width(),scale*m_head.height(),Qt::KeepAspectRatio, Qt::SmoothTransformation));
    //文字
    QPoint tr1(0,0);
    QPoint tr2(rect().width(),head_y);
    QRect text_rect(tr1,tr2);
    QFont font("Arial", 25);
    QString text("恭喜，奶龙又被您击退！\n看来，今天恐龙还不会灭绝。。。\n利用好收集到的能量精粹，\n为明日的逃亡做好准备吧！");
    painter.setFont(font);
    painter.setPen(QColor(40,40,40,a));
    painter.drawText(text_rect, Qt::AlignCenter | Qt::TextWordWrap, text);

}

void EnvironmentSystem::paintWhiteBackground(QPainter &painter)
{
    painter.setBrush(QColor(240,240,240));
    painter.drawRect(m_rect);
}