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#pragma once
#include "point2d.hpp"
#include "rect2d.hpp"
#include "any_rect2d.hpp"
#include "../base/math.hpp"
class ScreenBase
{
m2::RectD m_PixelRect;
double m_Scale;
ang::AngleD m_Angle;
m2::PointD m_Org;
protected:
/// @group Dependent parameters
/// Global to Pixel conversion matrix.
/// |a11 a12 0|
/// |x, y, 1| * |a21 a22 0| = |x', y', 1|
/// |a31 a32 1|
/// @{
math::Matrix<double, 3, 3> m_GtoP;
/// Pixel to Global conversion matrix. Inverted GtoP matrix.
math::Matrix<double, 3, 3> m_PtoG;
/// Global Rect
m2::AnyRectD m_GlobalRect;
/// X-axis aligned global rect used for clipping
m2::RectD m_ClipRect;
/// @}
// Update dependent parameters from base parameters.
// Must be called when base parameters changed.
void UpdateDependentParameters();
public:
ScreenBase();
ScreenBase(m2::RectI const & pxRect, m2::AnyRectD const & glbRect);
void SetFromRect(m2::AnyRectD const & rect);
void SetOrg(m2::PointD const & p);
void Move(double dx, double dy);
void MoveG(m2::PointD const & p);
/// scale global rect
void Scale(double scale);
void Rotate(double angle);
void OnSize(m2::RectI const & r);
void OnSize(int x0, int y0, int w, int h);
public:
double GetScale() const;
double GetAngle() const;
m2::PointD const & GetOrg() const;
int GetWidth() const;
int GetHeight() const;
inline m2::PointD GtoP(m2::PointD const & pt) const
{
return pt * m_GtoP;
}
inline m2::PointD PtoG(m2::PointD const & pt) const
{
return pt * m_PtoG;
}
inline void GtoP(double & x, double & y) const
{
double tempX = x;
x = tempX * m_GtoP(0, 0) + y * m_GtoP(1, 0) + m_GtoP(2, 0);
y = tempX * m_GtoP(1, 0) + y * m_GtoP(1, 1) + m_GtoP(2, 1);
}
inline void PtoG(double & x, double & y) const
{
double tempX = x;
x = tempX * m_PtoG(0, 0) + y * m_PtoG(1, 0) + m_PtoG(2, 0);
y = tempX * m_PtoG(0, 1) + y * m_PtoG(1, 1) + m_PtoG(2, 1);
}
void GtoP(m2::RectD const & gr, m2::RectD & sr) const;
void PtoG(m2::RectD const & pr, m2::RectD & gr) const;
math::Matrix<double, 3, 3> const & GtoPMatrix() const;
math::Matrix<double, 3, 3> const & PtoGMatrix() const;
m2::RectD const & PixelRect() const;
m2::AnyRectD const & GlobalRect() const;
m2::RectD const & ClipRect() const;
/// Compute arbitrary pixel transformation, that translates the (oldPt1, oldPt2) -> (newPt1, newPt2)
static math::Matrix<double, 3, 3> const CalcTransform(m2::PointD const & oldPt1, m2::PointD const & oldPt2,
m2::PointD const & newPt1, m2::PointD const & newPt2);
/// Setting GtoP matrix extracts the Angle and m_Org parameters, leaving PixelRect intact
void SetGtoPMatrix(math::Matrix<double, 3, 3> const & m);
/// Extracting parameters from matrix, that is supposed to represent GtoP transformation
static void ExtractGtoPParams(math::Matrix<double, 3, 3> const & m, double & a, double & s, double & dx, double & dy);
bool operator != (ScreenBase const & src) const
{
return !(*this == src);
}
bool operator == (ScreenBase const & src) const
{
return (m_GtoP == src.m_GtoP) && (m_PtoG == src.m_PtoG);
}
};
/// checking whether the s1 transforms into s2 without scaling, only with shift and rotation
bool IsPanningAndRotate(ScreenBase const & s1, ScreenBase const & s2);
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