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#include "screenbase.hpp"
#include "../std/cmath.hpp"
#include "../base/matrix.hpp"
#include "../base/logging.hpp"
#include "transformations.hpp"
#include "angles.hpp"
#include "../base/start_mem_debug.hpp"
ScreenBase::ScreenBase() :
m_PixelRect(0, 0, 640, 480),
m_Scale(0.1),
m_Angle(0.0),
m_Org(320, 240),
m_GlobalRect(m_Org, ang::AngleD(0), m2::RectD(-320, -240, 320, 240)),
m_ClipRect(m2::RectD(0, 0, 640, 480))
{
m_GtoP = math::Identity<double, 3>();
m_PtoG = math::Identity<double, 3>();
// UpdateDependentParameters();
}
ScreenBase::ScreenBase(m2::RectI const & pxRect, m2::AnyRectD const & glbRect)
{
OnSize(pxRect);
SetFromRect(glbRect);
}
void ScreenBase::UpdateDependentParameters()
{
m_PtoG = math::Shift( /// 5. shifting on (E0, N0)
math::Rotate( /// 4. rotating on the screen angle
math::Scale( /// 3. scaling to translate pixel sizes to global
math::Scale( /// 2. swapping the Y axis??? why??? supposed to be a rotation on -pi / 2 here.
math::Shift( /// 1. shifting for the pixel center to become (0, 0)
math::Identity<double, 3>(),
- m_PixelRect.Center()
),
1,
-1
),
m_Scale,
m_Scale
),
m_Angle.cos(),
m_Angle.sin()
),
m_Org
);
m_GtoP = math::Inverse(m_PtoG);
double HalfSizeX = PtoG(m2::PointD(m_PixelRect.maxX(), m_PixelRect.Center().y)).Length(PtoG(m2::PointD(m_PixelRect.Center())));
double HalfSizeY = PtoG(m2::PointD(m_PixelRect.Center().x, m_PixelRect.minY())).Length(PtoG(m2::PointD(m_PixelRect.Center())));
m_GlobalRect = m2::AnyRectD(m_Org, m_Angle, m2::RectD(-HalfSizeX, -HalfSizeY, HalfSizeX, HalfSizeY));
m_ClipRect = m_GlobalRect.GetGlobalRect();
}
void ScreenBase::SetFromRect(m2::AnyRectD const & GlobalRect)
{
double hScale = GlobalRect.GetLocalRect().SizeX() / m_PixelRect.SizeX();
double vScale = GlobalRect.GetLocalRect().SizeY() / m_PixelRect.SizeY();
m_Scale = max(hScale, vScale);
m_Angle = GlobalRect.angle();
m_Org = GlobalRect.GlobalCenter();
UpdateDependentParameters();
}
void ScreenBase::SetOrg(m2::PointD const & p)
{
m_Org = p;
UpdateDependentParameters();
}
void ScreenBase::Move(double dx, double dy)
{
m_Org = PtoG(GtoP(m_Org) - m2::PointD(dx, dy));
UpdateDependentParameters();
}
void ScreenBase::MoveG(m2::PointD const & p)
{
m_Org -= p;
UpdateDependentParameters();
}
void ScreenBase::Scale(double scale)
{
m_Scale /= scale;
UpdateDependentParameters();
}
void ScreenBase::Rotate(double angle)
{
m_Angle = ang::AngleD(m_Angle.val() + angle);
UpdateDependentParameters();
}
void ScreenBase::OnSize(m2::RectI const & r)
{
m_PixelRect = m2::RectD(r);
UpdateDependentParameters();
}
void ScreenBase::OnSize(int x0, int y0, int w, int h)
{
OnSize(m2::RectI(x0, y0, x0 + w, y0 + h));
}
math::Matrix<double, 3, 3> const & ScreenBase::GtoPMatrix() const
{
return m_GtoP;
}
math::Matrix<double, 3, 3> const & ScreenBase::PtoGMatrix() const
{
return m_PtoG;
}
m2::RectD const & ScreenBase::PixelRect() const
{
return m_PixelRect;
}
m2::AnyRectD const & ScreenBase::GlobalRect() const
{
return m_GlobalRect;
}
m2::RectD const & ScreenBase::ClipRect() const
{
return m_ClipRect;
}
double ScreenBase::GetScale() const
{
return m_Scale;
}
double ScreenBase::GetAngle() const
{
return m_Angle.val();
}
int ScreenBase::GetWidth() const
{
return my::rounds(m_PixelRect.SizeX());
}
int ScreenBase::GetHeight() const
{
return my::rounds(m_PixelRect.SizeY());
}
math::Matrix<double, 3, 3> const ScreenBase::CalcTransform(m2::PointD const & oldPt1, m2::PointD const & oldPt2,
m2::PointD const & newPt1, m2::PointD const & newPt2)
{
double s = newPt1.Length(newPt2) / oldPt1.Length(oldPt2);
double a = ang::AngleTo(newPt1, newPt2) - ang::AngleTo(oldPt1, oldPt2);
math::Matrix<double, 3, 3> m =
math::Shift(
math::Scale(
math::Rotate(
math::Shift(
math::Identity<double, 3>(),
-oldPt1.x, -oldPt1.y
),
a
),
s, s
),
newPt1.x, newPt1.y
);
return m;
}
void ScreenBase::SetGtoPMatrix(math::Matrix<double, 3, 3> const & m)
{
m_GtoP = m;
m_PtoG = math::Inverse(m_GtoP);
/// Extracting transformation params, assuming that the matrix
/// somehow represent a valid screen transformation
/// into m_PixelRectangle
double dx, dy, a, s;
ExtractGtoPParams(m, a, s, dx, dy);
m_Angle = ang::AngleD(-a);
m_Scale = 1 / s;
m_Org = PtoG(m_PixelRect.Center());
UpdateDependentParameters();
}
void ScreenBase::GtoP(m2::RectD const & glbRect, m2::RectD & pxRect) const
{
pxRect = m2::RectD(GtoP(glbRect.LeftTop()), GtoP(glbRect.RightBottom()));
}
void ScreenBase::PtoG(m2::RectD const & pxRect, m2::RectD & glbRect) const
{
glbRect = m2::RectD(PtoG(pxRect.LeftTop()), PtoG(pxRect.RightBottom()));
}
bool IsPanningAndRotate(ScreenBase const & s1, ScreenBase const & s2)
{
m2::RectD r1 = s1.GlobalRect().GetLocalRect();
m2::RectD r2 = s2.GlobalRect().GetLocalRect();
m2::PointD c1 = r1.Center();
m2::PointD c2 = r2.Center();
m2::PointD globPt(c1.x - r1.minX(),
c1.y - r1.minY());
m2::PointD p1 = s1.GtoP(s1.GlobalRect().ConvertFrom(c1)) - s1.GtoP(s1.GlobalRect().ConvertFrom(c1 + globPt));
m2::PointD p2 = s2.GtoP(s2.GlobalRect().ConvertFrom(c2)) - s2.GtoP(s2.GlobalRect().ConvertFrom(c2 + globPt));
return p1.EqualDxDy(p2, 0.00001);
}
void ScreenBase::ExtractGtoPParams(math::Matrix<double, 3, 3> const & m, double &a, double &s, double &dx, double &dy)
{
s = sqrt(m(0, 0) * m(0, 0) + m(0, 1) * m(0, 1));
double cosA = m(0, 0) / s;
double sinA = -m(0, 1) / s;
if (cosA != 0)
a = atan2(sinA, cosA);
else
if (sinA > 0)
a = math::pi / 2;
else
a = 3 * math::pi / 2;
dx = m(2, 0);
dy = m(2, 1);
}
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