void Navigator::DoRotate(double a, double /*timeInSec*/)
{
ScreenBase tmp = m_StartScreen;
tmp.Rotate(a - m_StartAngle);
m_StartAngle = a;
m_Screen = tmp;
m_StartScreen = tmp;
}
int GetTileScaleBase(ScreenBase const & s, uint32_t tileSize)
{
ScreenBase tmpS = s;
tmpS.Rotate(-tmpS.GetAngle());
// slightly smaller than original to produce "antialiasing" effect using bilinear filtration.
int const halfSize = static_cast<int>(tileSize / 1.05 / 2.0);
m2::RectD glbRect;
m2::PointD const pxCenter = tmpS.PixelRect().Center();
tmpS.PtoG(m2::RectD(pxCenter - m2::PointD(halfSize, halfSize),
pxCenter + m2::PointD(halfSize, halfSize)),
glbRect);
return GetTileScaleBase(glbRect);
}
bool Navigator::ScaleImpl(m2::PointD const & newPt1, m2::PointD const & newPt2,
m2::PointD const & oldPt1, m2::PointD const & oldPt2,
bool skipMinScaleAndBordersCheck,
bool doRotateScreen)
{
math::Matrix<double, 3, 3> newM = m_Screen.GtoPMatrix() * ScreenBase::CalcTransform(oldPt1, oldPt2, newPt1, newPt2);
double oldAngle = m_Screen.GetAngle();
ScreenBase tmp = m_Screen;
tmp.SetGtoPMatrix(newM);
if (!doRotateScreen)
tmp.Rotate(-(tmp.GetAngle() - oldAngle));
if (!skipMinScaleAndBordersCheck && !CheckMinScale(tmp))
return false;
m2::RectD const & worldR = m_scales.GetWorldRect();
if (!skipMinScaleAndBordersCheck && !CheckBorders(tmp))
{
if (CanShrinkInto(tmp, worldR))
tmp = ShrinkInto(tmp, worldR);
else
return false;
}
if (!CheckMaxScale(tmp))
return false;
// re-checking the borders, as we might violate them a bit (don't know why).
if (!CheckBorders(tmp))
tmp = ScaleInto(tmp, worldR);
m_Screen = tmp;
return true;
}