Added tile-based model-view

2 files changed, 24 insertions, 0 deletions

diff --git a/geometry/screenbase.cpp b/geometry/screenbase.cpp
index 32ba27b523..be334dbdf3 100644
--- a/geometry/screenbase.cpp
+++ b/geometry/screenbase.cpp
@@ -509,3 +509,24 @@ bool ScreenBase::IsReverseProjection3d(m2::PointD const & pt) const
   Vector3dT const perspectivePoint = normalizedPoint * m_Pto3d;
   return perspectivePoint(0, 3) < 0.0;
 }
+
+ScreenBase::Matrix3dT ScreenBase::GetModelView() const
+{
+  return ScreenBase::Matrix3dT { m_GtoP(0, 0), m_GtoP(1, 0), 0, m_GtoP(2, 0),
+                                 m_GtoP(0, 1), m_GtoP(1, 1), 0, m_GtoP(2, 1),
+                                 0, 0, 1, 0,
+                                 0, 0, 0, 1 };
+}
+
+ScreenBase::Matrix3dT ScreenBase::GetModelView(m2::PointD const & pivot, double scalar) const
+{
+  MatrixT const & m = m_GtoP;
+  double const s = 1.0 / scalar;
+  return ScreenBase::Matrix3dT
+  {
+    s * m(0, 0), s * m(1, 0), 0, m(2, 0) + pivot.x * m(0, 0) + pivot.y * m(1, 0),
+    s * m(0, 1), s * m(1, 1), 0, m(2, 1) + pivot.x * m(0, 1) + pivot.y * m(1, 1),
+    0, 0, 1, 0,
+    0, 0, 0, 1
+  };
+}
diff --git a/geometry/screenbase.hpp b/geometry/screenbase.hpp
index 5094eabc8f..c0d462a90f 100644
--- a/geometry/screenbase.hpp
+++ b/geometry/screenbase.hpp
@@ -165,6 +165,9 @@ public:
   m2::RectD CalculatePixelRect(double scale) const;
   double CalculatePerspectiveAngle(double scale) const;
 
+  Matrix3dT GetModelView() const;
+  Matrix3dT GetModelView(m2::PointD const & pivot, double scalar) const;
+
   static double CalculateAutoPerspectiveAngle(double scale);
 
   /// Compute arbitrary pixel transformation, that translates the (oldPt1, oldPt2) -> (newPt1, newPt2)