CODTransform Class

class CODTransform: public CObject

Two dimensional transformaion matrix. This is used to transform the vertices of components when moved, rotated or scaled.

Defined in: OdTransform.h

Coordinates (x,y) can be transformed using this matrix formula:

| x'| = | a b | * | x | + | c |
| y'| | d e | | y | | f |

Or, by forming one transformation matrix:
| x'| | a b c | | x |
| y'| = | d e f | * | y |
| 1 | | 0 0 1 | | 1 | <- we don't have a third dimension!

The middle matrix is what a CODTransform represents. Points in space are 
transformed by multiplying the matrix by the vector [point.x, point.y, 1]
See Also

ODMatrix3x2
Class Members
   CODTransform()

Constructor.

   CODTransform(const CODTransform& xform)

Copy constructor.

ODMatrix3x2   m_matrix

The float array that contains the matrix data.

 void   Identity()

Sets this matrix to the identity matrix.

 BOOL   IsIdentity()

Returns TRUE if this is an identity matirx.

 float   GetElement(const int x, const int y) const

Constant method to retrieve a single element of the martix.

 float&   GetElementRef(const int x, const int y)

Method to retrieve a reference to an element of the martix.

 void   Translate(int nOffsetX, int nOffsetY)

Translates the matrix by horizontal and vertical offsets.

 void   Translate(float fOffsetX, float fOffsetY)

Translates the matrix by horizontal and vertical offsets.

 void   SetTranslation(const int nDistX, const int nDistY)

Sets the current translation from the origin.

 void   GetTranslation(int& nDistX, int& nDistY)

Gets the current translation from the origin.

 BOOL   IsTranslated()

Returns TRUE if the matrix has been translated from the origin.

 void   Rotate(int nAngle)

Rotates the transform.

 void   Rotate(int nAngle, float fOriginX, float fOriginY, CSize sizeAspectRatio = odg_sizeDefaultAspectRatio)

Rotates the transform, using the coordinates passed in as the origin.

 int   GetRotation()

Gets the current rotation of the transform.

 BOOL   IsRotated()

Returns TRUE if the transform rotated.

 void   Scale(float fScaleX, float fScaleY)

Scales the transform.

 void   Scale(float fScaleX, float fScaleY, float fOriginX, float fOriginY)

Scales the transform, using the coordinates passed in as the origin.

 void   GetScaling(float& fScaleX, float& fScaleY)

Gets the current scaling factors of the transform.

 BOOL   IsScaled()

Returns TRUE if the transform has been scaled.

 BOOL   IsStretched()

Returns TRUE if the transform has been stretched out of proportion.

   operator XFORM()

Cast to an XFORM structure.

 ODVector2&   operator[](const int x)

Returns the vector at the supplied x position.

 CODTransform&   operator=(const CODTransform& xform)

Sets this transform equal to another transform.

 BOOL   operator==(const CODTransform& xform) const

Tests for equality against another transform.

 BOOL   operator!=(const CODTransform& xform) const

Tests for inequality against another transform.

 CODTransform   operator+(const CODTransform& xform) const

Calculates the addition of another transform to this one.

 CODTransform   operator-(const CODTransform& xform) const

Calculates the subtraction of another transform from this one.

 CODTransform   operator*(const CODTransform& xform) const

Calculates the multiplication of another transform with this one.

 CODTransform&   operator+=(const CODTransform& xform)

Adds the values of another transform to this one.

 CODTransform&   operator-=(const CODTransform& xform)

Subtracts the values of another transform from this one.

 CODTransform&   operator*=(const CODTransform& xform)

Multiplies another transformation matrix with this one.

 float   Det()

Calculates the determinant of the transformation matrix.

 CPoint   TransformPoint(CPoint point)

Transforms a CPoint.

 void   TransformPoint(float& x, float& y)

Transforms floating point X and Y values.

 void   TransformPoints(LPPOINT lpPoints, int nCount)

Transforms an array of points.

 void   TransformPoints(LPPOINT lpBefore, LPPOINT lpAfter, int nCount)

Transforms an array of points, placing the result in another array.

 CPoint   InvTransformPoint(CPoint point)

Performs an inverse transform on a CODPoint.

 void   InvTransformPoints(LPPOINT lpPoints, int nCount)

Performs an inverse transform on an array of points.

 void   InvTransformPoints(LPPOINT lpBefore, LPPOINT lpAfter, int nCount)

Performs an inverse transform on an array of points, placing the result in another array.

 virtual void   Serialize(CArchive& ar)

Serializes the line properties.