X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/94e0018723919fe2ca2f5b5f0a42804c16dbf3a1..d57d0505d4c2186592833f18c3d40532d3a4bf0e:/src/common/affinematrix2d.cpp

diff --git a/src/common/affinematrix2d.cpp b/src/common/affinematrix2d.cpp
index b4605d4e53..5013b31f15 100644
--- a/src/common/affinematrix2d.cpp
+++ b/src/common/affinematrix2d.cpp
@@ -4,7 +4,7 @@
 // Author:      Based on wxTransformMatrix by Chris Breeze, Julian Smart
 // Created:     2011-04-05
 // Copyright:   (c) wxWidgets team
-// Licence:     wxWidgets licence
+// Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "wx/wxprec.h"
@@ -106,10 +106,13 @@ bool wxAffineMatrix2D::IsEqual(const wxAffineMatrix2DBase& t) const
 //
 
 // add the translation to this matrix
+// |  1   0   0 |   | m_11  m_12   0 |
+// |  0   1   0 | x | m_21  m_22   0 |
+// | dx  dy   1 |   | m_tx  m_ty   1 |
 void wxAffineMatrix2D::Translate(wxDouble dx, wxDouble dy)
 {
-    m_tx += dx;
-    m_ty += dy;
+    m_tx += m_11 * dx + m_21 * dy;
+    m_ty += m_12 * dx + m_22 * dy;
 }
 
 // add the scale to this matrix
@@ -124,19 +127,19 @@ void wxAffineMatrix2D::Scale(wxDouble xScale, wxDouble yScale)
     m_22 *= yScale;
 }
 
-// add the rotation to this matrix (counter clockwise, radians)
-// | cos   -sin   0 |   | m_11  m_12   0 |
-// | sin    cos   0 | x | m_21  m_22   0 |
+// add the rotation to this matrix (clockwise, radians)
+// | cos    sin   0 |   | m_11  m_12   0 |
+// | -sin   cos   0 | x | m_21  m_22   0 |
 // |  0      0    1 |   | m_tx  m_ty   1 |
-void wxAffineMatrix2D::Rotate(wxDouble ccRadians)
+void wxAffineMatrix2D::Rotate(wxDouble cRadians)
 {
-    wxDouble c = cos(ccRadians);
-    wxDouble s = sin(ccRadians);
+    wxDouble c = cos(cRadians);
+    wxDouble s = sin(cRadians);
 
-    wxDouble e11 = c*m_11 - s*m_21;
-    wxDouble e12 = c*m_12 - s*m_22;
-    m_21 = s*m_11 + c*m_21;
-    m_22 = s*m_12 + c*m_22;
+    wxDouble e11 = c*m_11 + s*m_21;
+    wxDouble e12 = c*m_12 + s*m_22;
+    m_21 = c*m_21 - s*m_11;
+    m_22 = c*m_22 - s*m_12;
     m_11 = e11;
     m_12 = e12;
 }
@@ -156,7 +159,7 @@ wxAffineMatrix2D::DoTransformPoint(const wxPoint2DDouble& src) const
         return src;
 
     return wxPoint2DDouble(src.m_x * m_11 + src.m_y * m_21 + m_tx,
-                           src.m_y * m_12 + src.m_y * m_22 + m_ty);
+                           src.m_x * m_12 + src.m_y * m_22 + m_ty);
 }
 
 // applies the matrix except for translations
@@ -170,7 +173,7 @@ wxAffineMatrix2D::DoTransformDistance(const wxPoint2DDouble& src) const
         return src;
 
     return wxPoint2DDouble(src.m_x * m_11 + src.m_y * m_21,
-                           src.m_y * m_12 + src.m_y * m_22);
+                           src.m_x * m_12 + src.m_y * m_22);
 }
 
 bool wxAffineMatrix2D::IsIdentity() const