Subversion Repositories QTron

#include "bike.h"

Bike::Bike(QTcpSocket *sock, int i)
{
    socket = sock;
    id = i;

    connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead()));
    connect(socket, SIGNAL(disconnected()), this, SLOT(disconnected()));

    isDisconnected = false;

    x = rand() % 800;
    y = rand() % 600;
    linePoints.append(QPoint(x, y));

    velocity = 1;
    angle = 0;
    name = "";
    show = false;
    isReady = false;
    hadGo = false;
    dead = false;
    collided = false;

    colour.setBlue(0);
    colour.setRed(0);
    colour.setGreen(0);

    if (!socket->waitForReadyRead(2000))
    {
        socket->disconnectFromHost();
        show = false;
        isReady = true;
        hadGo = false;
    }
}

void Bike::draw(QPainter *painter)
{
    if (show)
    {
        painter->setPen(colour);
        painter->setFont(QFont("sans", 12));

        for (int i = 0; i < linePoints.count(); i++)
        {
            QPoint point1;
            QPoint point2;
            if (i == 0)
            {
                point1 = linePoints[0];
            }
            else
            {
                point1 = linePoints[i - 1];
            }

            point2 = linePoints[i];

            painter->drawLine(point1, point2);
        }

        if (!collided)
        {
            collided = hasCollided();

            if (angle == 0)
            {
                y -= velocity;
            }
            else if (angle == 90)
            {
                x += velocity;
            }
            else if (angle == 180)
            {
                y += velocity;
            }
            else if (angle == 270)
            {
                x -= velocity;
            }
        }
        else
        {
            linePoints.clear();
        }

        if (angle == 0 || angle == 180)
        {
            painter->fillRect(x - 5, y - 15, 10, 30, colour);
        }
        else
        {
            painter->fillRect(x - 15, y - 5, 30, 10, colour);
        }

        painter->drawText(x, y - 20, name);
    }
}

void Bike::run(QList<Bike *> bikes)
{
    for (int i = 0; i < bikes.count(); i++)
    {
        Bike *bike = bikes[i];
        if (bike->isReady && bike->show)
        {
            if (bike->dead)
            {
                socket->write("DEAD ");
                socket->write(bike->name.toAscii());
                socket->write("\n");
            }
            else
            {
                socket->write("BIKE ");
                socket->write(bike->name.toAscii());
                socket->write(" ");
                socket->write(QString::number(bike->x).toAscii());
                socket->write(" ");
                socket->write(QString::number(bike->y).toAscii());
                socket->write(" ");
                socket->write(QString::number(bike->colour.red()).toAscii());
                socket->write(" ");
                socket->write(QString::number(bike->colour.green()).toAscii());
                socket->write(" ");
                socket->write(QString::number(bike->colour.blue()).toAscii());
                socket->write("\n");
            }
        }
    }

    linePoints.append(QPoint(x, y));

    if (dead)
    {
        show = false;
        isReady = true;
        hadGo = false;
        dead = false;
    }

    if (!dead)
    {
        socket->write("G\n");
        socket->flush();

        hadGo = false;
        if (!socket->waitForReadyRead(2000))
        {
            socket->disconnectFromHost();
            dead = true;
        }
        if (!hadGo)
        {
            socket->disconnectFromHost();
            dead = true;
        }
    }
    hasHadGo = true;
}

int sign(float x){
    if(x > 0){
        return 1;
    }
    if(x < 0){
        return -1;
    }
    return 0;
}

bool Bike::hasCollided()
{
    // Do collision detection here
    // use linePoints
    int i = linePoints.count() - 1;
    if(linePoints[i-1].x() < 0 || linePoints[i-1].x() > 800 || linePoints[i-1].y() < 0 || linePoints[i-1].y() > 600)
        return true;
    if(linePoints[i].x() < 0 || linePoints[i].x() > 800 || linePoints[i].y() < 0 || linePoints[i].y() > 600)
        return true;
    for(int j = 0; j < linePoints.count() - 2; j++)
    {
        if(!(linePoints[j].x() == linePoints[j+1].x() && linePoints[i].x() == linePoints[i-1].x()) && !(linePoints[j].y() == linePoints[j+1].y() && linePoints[i].y() == linePoints[i-1].y()))
        {
            // If not parallel
            if(linePoints[j].x() == linePoints[j+1].x())
            {
                // x equal
                if(linePoints[i-1].x() > linePoints[j].x() && linePoints[i].x() < linePoints[j].x() || linePoints[i-1].x() < linePoints[j].x() && linePoints[i].x() > linePoints[j].x()){
                    if((sign(linePoints[i-1].y() - linePoints[j].y()) != sign(linePoints[i-1].y() - linePoints[j+1].y())))
                        return true;
                }
            }
            else if(linePoints[j].y() == linePoints[j+1].y())
            {
                if(linePoints[i-1].y() > linePoints[j].y() && linePoints[i].y() < linePoints[j].y() || linePoints[i-1].y() < linePoints[j].y() && linePoints[i].y() > linePoints[j].y())
                {
                    if((sign(linePoints[i-1].x() - linePoints[j].x()) != sign(linePoints[i-1].x() - linePoints[j+1].x())))
                        return true;
                }
            }
        }
    }
    return false;
}

void Bike::reset()
{
    x = rand() % 800;
    y = rand() % 600;
    linePoints.clear();

    linePoints.append(QPoint(x, y));

    velocity = 1;
    angle = 0;
    show = true;
    isReady = true;
    hadGo = false;
    dead = false;
    collided = false;

    socket->write("RESET\n");
}

void Bike::readyRead()
{
    while (socket->canReadLine())
    {
        QByteArray data = socket->readLine();
        QString line = data.trimmed();

        if (line == "L")
        {
            angle -= 90;

            if (angle >= 360)
            {
                angle -= 360;
            }
            if (angle < 0)
            {
                angle += 360;
            }
            hadGo = true;
        }
        else if (line == "R")
        {
            angle += 90;

            if (angle >= 360)
            {
                angle -= 360;
            }
            if (angle < 0)
            {
                angle += 360;
            }
            hadGo = true;
        }
        else if (line == "A")
        {
            velocity += 0.1;
            hadGo = true;
        }
        else if (line == "D")
        {
            velocity -= 0.2;
            hadGo = true;
        }
        else if (line == "N")
        {
            hadGo = true;
        }
        else if (line.startsWith("NAME "))
        {
            name = line.remove(0, 5);
            isReady = true;
            show = true;
        }
        else if (line.startsWith("COLOUR "))
        {
            QStringList list = line.split(" ");
            if (list.count() >= 2)
            {
                colour.setRed(list[1].toInt());
            }
            if (list.count() >= 3)
            {
                colour.setGreen(list[2].toInt());
            }
            if (list.count() >= 4)
            {
                colour.setBlue(list[3].toInt());
            }
        }
    }
}

void Bike::disconnected()
{
    dead = true;
    isDisconnected = true;
    cout << ":: Disconnected: " << socket->peerAddress().toString().toStdString() << endl;
}