CGLDevice implementation

  - extended Gfx::CDevice interface
  - written OpenGL implementation in Gfx::CGLDevice
  - rewrote color and light module
  - added Gfx::VertexCol
  - added array casts to Math::Vector, Math::Matrix and Gfx::Color

4 files changed, 36 insertions, 0 deletions

diff --git a/src/math/geometry.h b/src/math/geometry.h
index 2f937e5..d5960b8 100644
--- a/src/math/geometry.h
+++ b/src/math/geometry.h
@@ -305,6 +305,24 @@ inline void LoadProjectionMatrix(Matrix &mat, float fov = 1.570795f, float aspec
     /* (3,4) */ mat.m[14] = -q * nearPlane;
 }
 
+//! Loads an othogonal projection matrix
+/** \a left,right coordinates for left and right vertical clipping planes
+    \a bottom,top coordinates for bottom and top horizontal clipping planes
+    \a zNear,zFar distance to nearer and farther depth clipping planes */
+inline void LoadOrthoProjectionMatrix(Matrix &mat, float left, float right, float bottom, float top,
+                                      float zNear = -1.0f, float zFar = 1.0f)
+{
+    mat.LoadIdentity();
+
+    /* (1,1) */ mat.m[0 ] =  2.0f / (right - left);
+    /* (2,2) */ mat.m[5 ] =  2.0f / (top - bottom);
+    /* (3,3) */ mat.m[10] = -2.0f / (zFar - zNear);
+
+    /* (1,4) */ mat.m[12] =  - (right + left) / (right - left);
+    /* (2,4) */ mat.m[12] =  - (top + bottom) / (top - bottom);
+    /* (3,4) */ mat.m[14] =  - (zFar + zNear) / (zFar - zNear);
+}
+
 //! Loads a translation matrix from given vector
 /** \a trans vector of translation*/
 inline void LoadTranslationMatrix(Matrix &mat, const Vector &trans)
diff --git a/src/math/matrix.h b/src/math/matrix.h
index 9b29f46..0315a33 100644
--- a/src/math/matrix.h
+++ b/src/math/matrix.h
@@ -118,6 +118,12 @@ struct Matrix
         /* (4,4) */ m[15] = 1.0f;
     }
 
+    //! Returns the struct cast to \c float* array; use with care!
+    inline float* Array()
+    {
+        return (float*)this;
+    }
+
     //! Transposes the matrix
     inline void Transpose()
     {
diff --git a/src/math/point.h b/src/math/point.h
index 84be190..d6768c8 100644
--- a/src/math/point.h
+++ b/src/math/point.h
@@ -67,6 +67,12 @@ struct Point
         x = y = 0.0f;
     }
 
+    //! Returns the struct cast to \c float* array; use with care!
+    inline float* Array()
+    {
+        return (float*)this;
+    }
+
     //! Returns the distance from (0,0) to the point (x,y)
     inline float Length()
     {
diff --git a/src/math/vector.h b/src/math/vector.h
index 3c756f2..baba6bb 100644
--- a/src/math/vector.h
+++ b/src/math/vector.h
@@ -72,6 +72,12 @@ struct Vector
         x = y = z = 0.0f;
     }
 
+    //! Returns the struct cast to \c float* array; use with care!
+    inline float* Array()
+    {
+        return (float*)this;
+    }
+
     //! Returns the vector length
     inline float Length() const
     {