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#include "screenbase.hpp"
#include "transformations.hpp"
#include "angles.hpp"
#include "../base/logging.hpp"
#include "../std/cmath.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);
}
ScreenBase::ScreenBase(ScreenBase const & s,
m2::PointD const & org, double scale, double angle)
: m_PixelRect(s.m_PixelRect),
m_Scale(scale), m_Angle(angle), m_Org(org)
{
UpdateDependentParameters();
}
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);
m2::PointD const pxC = m_PixelRect.Center();
double const szX = PtoG(m2::PointD(m_PixelRect.maxX(), pxC.y)).Length(PtoG(m2::PointD(pxC)));
double const szY = PtoG(m2::PointD(pxC.x, m_PixelRect.minY())).Length(PtoG(m2::PointD(pxC)));
m_GlobalRect = m2::AnyRectD(m_Org, m_Angle, m2::RectD(-szX, -szY, szX, szY));
m_ClipRect = m_GlobalRect.GetGlobalRect();
}
void ScreenBase::SetFromRects(m2::AnyRectD const & glbRect, m2::RectD const & pxRect)
{
double hScale = glbRect.GetLocalRect().SizeX() / pxRect.SizeX();
double vScale = glbRect.GetLocalRect().SizeY() / pxRect.SizeY();
m_Scale = max(hScale, vScale);
m_Angle = glbRect.Angle();
m_Org = glbRect.GlobalCenter();
UpdateDependentParameters();
}
void ScreenBase::SetFromRect(m2::AnyRectD const & glbRect)
{
SetFromRects(glbRect, m_PixelRect);
}
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));
}
double ScreenBase::GetMinPixelRectSize() const
{
return min(m_PixelRect.SizeX(), m_PixelRect.SizeY());
}
void ScreenBase::SetScale(double scale)
{
m_Scale = scale;
UpdateDependentParameters();
}
void ScreenBase::SetAngle(double angle)
{
m_Angle = ang::AngleD(angle);
UpdateDependentParameters();
}
int ScreenBase::GetWidth() const
{
return my::rounds(m_PixelRect.SizeX());
}
int ScreenBase::GetHeight() const
{
return my::rounds(m_PixelRect.SizeY());
}
ScreenBase::MatrixT 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);
MatrixT 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(MatrixT 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()));
}
void ScreenBase::GetTouchRect(m2::PointD const & pixPoint, double pixRadius,
m2::AnyRectD & glbRect) const
{
double const r = pixRadius * m_Scale;
glbRect = m2::AnyRectD(PtoG(pixPoint), m_Angle, m2::RectD(-r, -r, r, r));
}
void ScreenBase::GetTouchRect(m2::PointD const & pixPoint, double const pxWidth,
double const pxHeight, m2::AnyRectD & glbRect) const
{
double const width = pxWidth * m_Scale;
double const height = pxHeight * m_Scale;
glbRect = m2::AnyRectD(PtoG(pixPoint), m_Angle, m2::RectD(-width, -height, width, height));
}
bool IsPanningAndRotate(ScreenBase const & s1, ScreenBase const & s2)
{
m2::RectD const & r1 = s1.GlobalRect().GetLocalRect();
m2::RectD const & 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(MatrixT const & m,
double & a, double & s, double & dx, double & dy)
{
s = sqrt(m(0, 0) * m(0, 0) + m(0, 1) * m(0, 1));
a = ang::AngleIn2PI(atan2(-m(0, 1), m(0, 0)));
dx = m(2, 0);
dy = m(2, 1);
}
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