Enable graphics context by default

[wxWidgets.git] / src / common / matrix.cpp

diff --git a/src/common/matrix.cpp b/src/common/matrix.cpp
index 1785e0a2972a8473a102ca2d1412ff70c571419a..f1f8c319f97ae0754d205e8ead4685268ff6f518 100644 (file)
--- a/src/common/matrix.cpp
+++ b/src/common/matrix.cpp
@@ -1,17 +1,13 @@
-/////////////////////////////////////////////////////////////////////////////
-// Name:        matrix.cpp
+///////////////////////////////////////////////////////////////////////////////
+// Name:        src/common/matrix.cpp

 // Purpose:     wxTransformMatrix class
 // Author:      Chris Breeze, Julian Smart
 // Modified by: Klaas Holwerda
 // Created:     01/02/97
 // RCS-ID:      $Id$
 // Purpose:     wxTransformMatrix class
 // Author:      Chris Breeze, Julian Smart
 // Modified by: Klaas Holwerda
 // Created:     01/02/97
 // RCS-ID:      $Id$

-// Copyright:   (c) Julian Smart and Markus Holzem
+// Copyright:   (c) Julian Smart

 // Licence:     wxWindows licence
 // Licence:     wxWindows licence

-/////////////////////////////////////////////////////////////////////////////
-
-#ifdef __GNUG__
-#pragma implementation "matrix.h"
-#endif
+///////////////////////////////////////////////////////////////////////////////

 
 // Note: this is intended to be used in wxDC at some point to replace
 // the current system of scaling/translation. It is not yet used.
 
 // Note: this is intended to be used in wxDC at some point to replace
 // the current system of scaling/translation. It is not yet used.


@@ -20,26 +16,26 @@
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__

-#pragma hdrstop
+    #pragma hdrstop

 #endif
 
 #endif
 

+#include "wx/matrix.h"
+

 #ifndef WX_PRECOMP
 #ifndef WX_PRECOMP

-#include "wx/defs.h"
+    #include "wx/math.h"

 #endif
 
 #endif
 

-#include "wx/matrix.h"
-#include <math.h>
-
-const double pi = 3.1415926535;
+static const double pi = M_PI;

 
 wxTransformMatrix::wxTransformMatrix(void)
 {
 
 wxTransformMatrix::wxTransformMatrix(void)
 {

-    m_isIdentity = FALSE;
+    m_isIdentity = false;

 
     Identity();
 }
 
 wxTransformMatrix::wxTransformMatrix(const wxTransformMatrix& mat)
 
     Identity();
 }
 
 wxTransformMatrix::wxTransformMatrix(const wxTransformMatrix& mat)

+    : wxObject()

 {
     (*this) = mat;
 }
 {
     (*this) = mat;
 }


@@ -74,24 +70,24 @@ void wxTransformMatrix::operator = (const wxTransformMatrix& mat)
     m_isIdentity = mat.m_isIdentity;
 }
 
     m_isIdentity = mat.m_isIdentity;
 }
 

-bool wxTransformMatrix::operator == (const wxTransformMatrix& mat)
+bool wxTransformMatrix::operator == (const wxTransformMatrix& mat) const

 {
 {

-    if (m_isIdentity==TRUE && mat.m_isIdentity==TRUE)
-        return TRUE;
+    if (m_isIdentity && mat.m_isIdentity)
+        return true;

 
     int i, j;
     for (i = 0; i < 3; i++)
     {
         for (j = 0; j < 3; j++)
         {
 
     int i, j;
     for (i = 0; i < 3; i++)
     {
         for (j = 0; j < 3; j++)
         {

-            if (m_matrix[i][j] != mat.m_matrix[i][j])
-                return FALSE;
+            if ( !wxIsSameDouble(m_matrix[i][j], mat.m_matrix[i][j]) )
+                return false;

         }
     }
         }
     }

-    return TRUE;
+    return true;

 }
 
 }
 

-bool wxTransformMatrix::operator != (const wxTransformMatrix& mat)
+bool wxTransformMatrix::operator != (const wxTransformMatrix& mat) const

 {
     return (! ((*this) == mat));
 }
 {
     return (! ((*this) == mat));
 }


@@ -132,27 +128,22 @@ bool wxTransformMatrix::Invert(void)
 
     // now divide by the determinant
     double det = m_matrix[0][0] * inverseMatrix[0][0] + m_matrix[0][1] * inverseMatrix[1][0] + m_matrix[0][2] * inverseMatrix[2][0];
 
     // now divide by the determinant
     double det = m_matrix[0][0] * inverseMatrix[0][0] + m_matrix[0][1] * inverseMatrix[1][0] + m_matrix[0][2] * inverseMatrix[2][0];

-    if (det != 0.0)
-    {
-        inverseMatrix[0][0] /= det; inverseMatrix[1][0] /= det; inverseMatrix[2][0] /= det;
-        inverseMatrix[0][1] /= det; inverseMatrix[1][1] /= det; inverseMatrix[2][1] /= det;
-        inverseMatrix[0][2] /= det; inverseMatrix[1][2] /= det; inverseMatrix[2][2] /= det;
+    if ( wxIsNullDouble(det) )
+        return false;
+
+    inverseMatrix[0][0] /= det; inverseMatrix[1][0] /= det; inverseMatrix[2][0] /= det;
+    inverseMatrix[0][1] /= det; inverseMatrix[1][1] /= det; inverseMatrix[2][1] /= det;
+    inverseMatrix[0][2] /= det; inverseMatrix[1][2] /= det; inverseMatrix[2][2] /= det;

 
 

-        int i, j;
-        for (i = 0; i < 3; i++)
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)

         {
         {

-            for (j = 0; j < 3; j++)
-            {
-                m_matrix[i][j] = inverseMatrix[i][j];
-            }
+            m_matrix[i][j] = inverseMatrix[i][j];

         }
         }

-        m_isIdentity = IsIdentity1();
-        return TRUE;
-    }
-    else
-    {
-        return FALSE;

     }
     }

+    m_isIdentity = IsIdentity1();
+    return true;

 }
 
 // Make into identity matrix
 }
 
 // Make into identity matrix


@@ -160,9 +151,9 @@ bool wxTransformMatrix::Identity(void)
 {
     m_matrix[0][0] = m_matrix[1][1] = m_matrix[2][2] = 1.0;
     m_matrix[1][0] = m_matrix[2][0] = m_matrix[0][1] = m_matrix[2][1] = m_matrix[0][2] = m_matrix[1][2] = 0.0;
 {
     m_matrix[0][0] = m_matrix[1][1] = m_matrix[2][2] = 1.0;
     m_matrix[1][0] = m_matrix[2][0] = m_matrix[0][1] = m_matrix[2][1] = m_matrix[0][2] = m_matrix[1][2] = 0.0;

-    m_isIdentity = TRUE;
+    m_isIdentity = true;

 
 

-    return TRUE;
+    return true;

 }
 
 // Scale by scale (isotropic scaling i.e. the same in x and y):
 }
 
 // Scale by scale (isotropic scaling i.e. the same in x and y):


@@ -182,7 +173,7 @@ bool wxTransformMatrix::Scale(double scale)
     }
     m_isIdentity = IsIdentity1();
 
     }
     m_isIdentity = IsIdentity1();
 

-    return TRUE;
+    return true;

 }
 
 
 }
 
 


@@ -198,8 +189,8 @@ wxTransformMatrix&  wxTransformMatrix::Scale(const double &xs, const double &ys,
 
     if (m_isIdentity)
     {
 
     if (m_isIdentity)
     {

-        double tx  =xc*(1-xs);
-        double ty  =yc*(1-ys);
+        double tx = xc*(1-xs);
+        double ty = yc*(1-ys);

         r00 = xs;
         r10 = 0;
         r20 = tx;
         r00 = xs;
         r10 = 0;
         r20 = tx;


@@ -207,10 +198,10 @@ wxTransformMatrix&  wxTransformMatrix::Scale(const double &xs, const double &ys,
         r11 = ys;
         r21 = ty;
     }
         r11 = ys;
         r21 = ty;
     }

-    else if (xc!=0 || yc!=0)
+    else if ( !wxIsNullDouble(xc) || !wxIsNullDouble(yc) )

     {
     {

-        double tx  =xc*(1-xs);
-        double ty  =yc*(1-ys);
+        double tx = xc*(1-xs);
+        double ty = yc*(1-ys);

         r00 = xs * m_matrix[0][0];
         r10 = xs * m_matrix[1][0];
         r20 = xs * m_matrix[2][0] + tx;
         r00 = xs * m_matrix[0][0];
         r10 = xs * m_matrix[1][0];
         r20 = xs * m_matrix[2][0] + tx;


@@ -296,7 +287,7 @@ bool wxTransformMatrix::Translate(double dx, double dy)
 
     m_isIdentity = IsIdentity1();
 
 
     m_isIdentity = IsIdentity1();
 

-    return TRUE;
+    return true;

 }
 
 // Rotate clockwise by the given number of degrees:
 }
 
 // Rotate clockwise by the given number of degrees:


@@ -306,7 +297,7 @@ bool wxTransformMatrix::Translate(double dx, double dy)
 bool wxTransformMatrix::Rotate(double degrees)
 {
     Rotate(-degrees,0,0);
 bool wxTransformMatrix::Rotate(double degrees)
 {
     Rotate(-degrees,0,0);

-    return TRUE;
+    return true;

 }
 
 // counter clockwise rotate around a point
 }
 
 // counter clockwise rotate around a point


@@ -323,8 +314,8 @@ wxTransformMatrix&  wxTransformMatrix::Rotate(const double &degrees, const doubl
 
     if (m_isIdentity)
     {
 
     if (m_isIdentity)
     {

-        double tx  = x*(1-c)+y*s;
-        double ty  = y*(1-c)-x*s;
+        double tx = x*(1-c)+y*s;
+        double ty = y*(1-c)-x*s;

         r00 = c ;
         r10 = -s;
         r20 = tx;
         r00 = c ;
         r10 = -s;
         r20 = tx;


@@ -332,10 +323,10 @@ wxTransformMatrix&  wxTransformMatrix::Rotate(const double &degrees, const doubl
         r11 = c;
         r21 = ty;
     }
         r11 = c;
         r21 = ty;
     }

-    else if (x!=0 || y!=0)
+    else if ( !wxIsNullDouble(x) || !wxIsNullDouble(y) )

     {
     {

-        double tx  = x*(1-c)+y*s;
-        double ty  = y*(1-c)-x*s;
+        double tx = x*(1-c)+y*s;
+        double ty = y*(1-c)-x*s;

         r00 = c * m_matrix[0][0] - s * m_matrix[0][1] + tx * m_matrix[0][2];
         r10 = c * m_matrix[1][0] - s * m_matrix[1][1] + tx * m_matrix[1][2];
         r20 = c * m_matrix[2][0] - s * m_matrix[2][1] + tx;// * m_matrix[2][2];
         r00 = c * m_matrix[0][0] - s * m_matrix[0][1] + tx * m_matrix[0][2];
         r10 = c * m_matrix[1][0] - s * m_matrix[1][1] + tx * m_matrix[1][2];
         r20 = c * m_matrix[2][0] - s * m_matrix[2][1] + tx;// * m_matrix[2][2];


@@ -384,13 +375,13 @@ bool wxTransformMatrix::TransformPoint(double x, double y, double& tx, double& t
 {
     if (IsIdentity())
     {
 {
     if (IsIdentity())
     {

-        tx = x; ty = y; return TRUE;
+        tx = x; ty = y; return true;

     }
 
     tx = x * m_matrix[0][0] + y * m_matrix[1][0] + m_matrix[2][0];
     ty = x * m_matrix[0][1] + y * m_matrix[1][1] + m_matrix[2][1];
 
     }
 
     tx = x * m_matrix[0][0] + y * m_matrix[1][0] + m_matrix[2][0];
     ty = x * m_matrix[0][1] + y * m_matrix[1][1] + m_matrix[2][1];
 

-    return TRUE;
+    return true;

 }
 
 // Transform a point from device to logical coordinates.
 }
 
 // Transform a point from device to logical coordinates.


@@ -407,18 +398,18 @@ bool wxTransformMatrix::InverseTransformPoint(double x, double y, double& tx, do
 {
     if (IsIdentity())
     {
 {
     if (IsIdentity())
     {

-        tx = x; ty = y; return TRUE;
+        tx = x;
+        ty = y;
+        return true;

     }
 
     }
 

-    double z = (1.0 - m_matrix[0][2] * x - m_matrix[1][2] * y) / m_matrix[2][2];
-    if (z == 0.0)
-    {
-//      z = 0.0000001;
-        return FALSE;
-    }
+    const double z = (1.0 - m_matrix[0][2] * x - m_matrix[1][2] * y) / m_matrix[2][2];
+    if ( wxIsNullDouble(z) )
+        return false;
+

     tx = x * m_matrix[0][0] + y * m_matrix[1][0] + z * m_matrix[2][0];
     ty = x * m_matrix[0][1] + y * m_matrix[1][1] + z * m_matrix[2][1];
     tx = x * m_matrix[0][0] + y * m_matrix[1][0] + z * m_matrix[2][0];
     ty = x * m_matrix[0][1] + y * m_matrix[1][1] + z * m_matrix[2][1];

-    return TRUE;
+    return true;

 }
 
 wxTransformMatrix& wxTransformMatrix::operator*=(const double& t)
 }
 
 wxTransformMatrix& wxTransformMatrix::operator*=(const double& t)


@@ -559,7 +550,7 @@ double wxTransformMatrix::Get_scaleX()
 {
     double scale_factor;
     double rot_angle = CheckInt(atan2(m_matrix[1][0],m_matrix[0][0])*180/pi);
 {
     double scale_factor;
     double rot_angle = CheckInt(atan2(m_matrix[1][0],m_matrix[0][0])*180/pi);

-    if (rot_angle != 90 && rot_angle != -90)
+    if ( !wxIsSameDouble(rot_angle, 90) && !wxIsSameDouble(rot_angle, -90) )

         scale_factor = m_matrix[0][0]/cos((rot_angle/180)*pi);
     else
         scale_factor = m_matrix[0][0]/sin((rot_angle/180)*pi);  // er kan nl. niet door 0 gedeeld worden !
         scale_factor = m_matrix[0][0]/cos((rot_angle/180)*pi);
     else
         scale_factor = m_matrix[0][0]/sin((rot_angle/180)*pi);  // er kan nl. niet door 0 gedeeld worden !


@@ -575,7 +566,7 @@ double wxTransformMatrix::Get_scaleY()
 {
     double scale_factor;
     double rot_angle = CheckInt(atan2(m_matrix[1][0],m_matrix[0][0])*180/pi);
 {
     double scale_factor;
     double rot_angle = CheckInt(atan2(m_matrix[1][0],m_matrix[0][0])*180/pi);

-    if (rot_angle != 90 && rot_angle != -90)
+    if ( !wxIsSameDouble(rot_angle, 90) && !wxIsSameDouble(rot_angle, -90) )

        scale_factor = m_matrix[1][1]/cos((rot_angle/180)*pi);
     else
        scale_factor = m_matrix[1][1]/sin((rot_angle/180)*pi);   // er kan nl. niet door 0 gedeeld worden !
        scale_factor = m_matrix[1][1]/cos((rot_angle/180)*pi);
     else
        scale_factor = m_matrix[1][1]/sin((rot_angle/180)*pi);   // er kan nl. niet door 0 gedeeld worden !


@@ -608,4 +599,3 @@ void wxTransformMatrix::SetRotation(double rotation)
     Rotate(-GetRotation(), x, y);
     Rotate(rotation, x, y);
 }
     Rotate(-GetRotation(), x, y);
     Rotate(rotation, x, y);
 }

-