btVector3 Mesh::scalePoint(const btVector3& triangle, const Ogre::Vector3& origin,float scaleFactor)
{
float x = triangle.x() - origin.x;
x = x * scaleFactor;
float y = triangle.y() - origin.y;
y = y * scaleFactor;
float z = triangle. z() - origin.z;
z = z * scaleFactor;
btVector3 scaledPoint(x+origin.x,y+origin.y,z+origin.z);
return scaledPoint;
}
void CameraView::paintEvent(QPaintEvent*)
{
QPainter painter;
painter.begin(this);
painter.setRenderHint(QPainter::Antialiasing);
if(!cameraIdsDrawn || frame == NULL)
{
painter.setBrush(Qt::black);
painter.drawRect(rect());
painter.setPen(Qt::blue);
painter.drawText(QPoint(5, height() - 5), id);
cameraIdsDrawn = true;
}
if(frame != NULL)
{
QImage scaledFrame = frame->scaledToWidth(width(), Qt::SmoothTransformation);
double scaleFactor = (double)scaledFrame.width() / (double)frame->width();
int offsetY = (height() - scaledFrame.height()) / 2;
painter.drawImage(QPoint(0,offsetY), scaledFrame);
painter.setClipRect(0, offsetY, width(), scaledFrame.height());
painter.setBrush(QBrush(QColor(200, 200, 200, 150)));
for(std::vector<QPolygon>::iterator it = aois.begin(); it != aois.end(); ++it)
{
QPolygon scaledAoi;
for(int i = 0; i < it->size(); ++i)
{
QPoint point = it->at(i);
QPoint scaledPoint((int)((double)point.x() * scaleFactor),
(int)((double)point.y() * scaleFactor) + offsetY);
scaledAoi << scaledPoint;
}
painter.drawPolygon(scaledAoi);
}
}
painter.end();
}
