only-stats should never create visual gears. and lua should never rely on visual gears being created. critical is just to help ensure ones important to gameplay don't get lost in fast-forward
#include <QDebug>
#include <QGraphicsSceneMouseEvent>
#include <QGraphicsPathItem>
#include <QtEndian>
#include "drawmapscene.h"
template <class T> T sqr(const T & x)
{
return x*x;
}
DrawMapScene::DrawMapScene(QObject *parent) :
QGraphicsScene(parent),
m_pen(Qt::yellow),
m_brush(Qt::yellow)
{
setSceneRect(0, 0, 4096, 2048);
QLinearGradient gradient(0, 0, 0, 2048);
gradient.setColorAt(0, QColor(60, 60, 155));
gradient.setColorAt(1, QColor(155, 155, 60));
setBackgroundBrush(QBrush(gradient));
m_pen.setWidth(67);
m_pen.setJoinStyle(Qt::RoundJoin);
m_pen.setCapStyle(Qt::RoundCap);
m_currPath = 0;
}
void DrawMapScene::mouseMoveEvent(QGraphicsSceneMouseEvent * mouseEvent)
{
qDebug() << "move" << mouseEvent->scenePos();
if(m_currPath && (mouseEvent->buttons() & Qt::LeftButton))
{
QPainterPath path = m_currPath->path();
path.lineTo(mouseEvent->scenePos());
paths.first().append(mouseEvent->scenePos().toPoint());
m_currPath->setPath(path);
emit pathChanged();
}
}
void DrawMapScene::mousePressEvent(QGraphicsSceneMouseEvent * mouseEvent)
{
qDebug() << "press" << mouseEvent->scenePos();
m_currPath = addPath(QPainterPath(), m_pen);
QPainterPath path = m_currPath->path();
QPointF p = mouseEvent->scenePos();
p += QPointF(0.01, 0.01);
path.moveTo(p);
path.lineTo(mouseEvent->scenePos());
paths.prepend(QList<QPoint>() << mouseEvent->scenePos().toPoint());
m_currPath->setPath(path);
emit pathChanged();
}
void DrawMapScene::mouseReleaseEvent(QGraphicsSceneMouseEvent * mouseEvent)
{
qDebug() << "release" << mouseEvent->scenePos();
simplifyLast();
m_currPath = 0;
}
void DrawMapScene::undo()
{
if(items().size())
{
removeItem(items().first());
paths.removeFirst();
emit pathChanged();
}
}
QByteArray DrawMapScene::encode()
{
QByteArray b;
foreach(QList<QPoint> points, paths)
{
int cnt = 0;
foreach(QPoint point, points)
{
qint16 px = qToBigEndian((qint16)point.x());
qint16 py = qToBigEndian((qint16)point.y());
quint8 flags = 2;
if(!cnt) flags |= 0x80;
b.append((const char *)&px, 2);
b.append((const char *)&py, 2);
b.append((const char *)&flags, 1);
++cnt;
}
}
return b;
}
void DrawMapScene::decode(QByteArray data)
{
clear();
paths.clear();
QList<QPoint> points;
while(data.size() >= 5)
{
qint16 px = qFromBigEndian(*(qint16 *)data.data());
data.remove(0, 2);
qint16 py = qFromBigEndian(*(qint16 *)data.data());
data.remove(0, 2);
quint8 flags = *(quint8 *)data.data();
data.remove(0, 1);
//last chunk or first point
if((data.size() < 5) || (flags & 0x80))
{
if(points.size())
{
qDebug() << points;
addPath(pointsToPath(points), m_pen);
paths.prepend(points);
points.clear();
}
}
points.append(QPoint(px, py));
}
}
void DrawMapScene::simplifyLast()
{
QList<QPoint> points = paths[0];
QPoint prevPoint = points.first();
int i = 1;
while(i < points.size())
{
if( (i != points.size() - 1)
&& (sqr(prevPoint.x() - points[i].x()) + sqr(prevPoint.y() - points[i].y()) < 1000)
)
points.removeAt(i);
else
{
prevPoint = points[i];
++i;
}
}
paths[0] = points;
// redraw path
{
QGraphicsPathItem * pathItem = static_cast<QGraphicsPathItem *>(items()[0]);
pathItem->setPath(pointsToPath(paths[0]));
}
emit pathChanged();
}
QPainterPath DrawMapScene::pointsToPath(const QList<QPoint> points)
{
QPainterPath path;
if(points.size())
{
QPointF p = points[0] + QPointF(0.01, 0.01);
path.moveTo(p);
foreach(QPoint p, points)
path.lineTo(p);
}
return path;
}