[ADD] new transformation function

src/dataHandler/WGridRegular3D.cpp

@@ -386,6 +386,22 @@ wmath::WVector3D WGridRegular3D::worldCoordToTexCoord( wmath::WPosition point )
     r[1] += 0.5 / m_nbPosY;
     r[2] += 0.5 / m_nbPosZ;
 
+    return r;
+}
+
+wmath::WPosition WGridRegular3D::texCoordToWorldCoord( wmath::WVector3D coords )
+{
+    wmath::WVector3D r( wmath::transformPosition3DWithMatrix4D( m_matrix, coords ) );
+
+    // Correct the coordinates to have the position at the center of the texture voxel.
+    r[0] -= 0.5 / m_nbPosX;
+    r[1] -= 0.5 / m_nbPosY;
+    r[2] -= 0.5 / m_nbPosZ;
+
+    // Scale to [0,max]
+    r[0] = r[0] * m_nbPosX;
+    r[1] = r[1] * m_nbPosY;
+    r[2] = r[2] * m_nbPosZ;
 
     return r;
 }

src/dataHandler/WGridRegular3D.h

@@ -250,10 +250,16 @@ public:
 
     /**
      * Transforms world coordinates to texture coordinates.
-     * \param point The point with these coordinated will be transformed.
+     * \param point The point with these coordinates will be transformed.
      */
     wmath::WVector3D worldCoordToTexCoord( wmath::WPosition point );
 
+    /**
+     * Transforms texture coordinates to world coordinates.
+     * \param point The point with these coordinates will be transformed.
+     */
+    wmath::WPosition texCoordToWorldCoord( wmath::WVector3D coords );
+
     /**
      * Returns the i'th voxel where the given position belongs too.
      *