/* matrix.h                                              -*-C++-*-
 *   by Will Wagner <wwagner@io.com>
 *   last updated 11 Aug 1997, 17:33:08 wwagner
 *
 * This file contains the class declaration for the matrix and
 * transformation classes for POVRay.
 *
 * Changes
 *   04 Aug 1997
 *     - Added this comment block.
 *
 * Things to do
 *
 */

#ifndef __INC_MATRICES_H__
#define __INC_MATRICES_H__

#include "vector.h"
#include "frame.h"

class Matrix
{
  private:
    vector<DBL> *column;

  public:
    Matrix(void);
    Matrix(const Matrix&);
    ~Matrix();

    void Zero(void);
    void Identity(void);
    pov_vector<DBL>& operator[](int) const;
    Matrix& operator=(const Matrix&);
    Matrix operator*(Matrix&) const;
    Matrix& operator*=(Matrix&);
    friend Matrix Transpose(const Matrix&);
    friend Matrix Invert(const Matrix&);
};

class Transformation
{
  private:
    Matrix ma, in;

  public:
    Transformation(void);
    Transformation(const Transformation&);
    ~Transformation();

    pov_vector<DBL> TransformPoint(pov_vector<DBL>&);
    pov_vector<DBL> InverseTransformPoint(pov_vector<DBL>&);
    pov_vector<DBL> TransformDirection(pov_vector<DBL>&);
    pov_vector<DBL> InverseTransformDirection(pov_vector<DBL>&);
    pov_vector<DBL> TransformNormal(pov_vector<DBL>&);
    pov_vector<DBL> InverseTransformNormal(pov_vector<DBL>&);
    void MatrixTransform(Matrix&);
    void ScalingTransform(pov_vector<DBL>&);
    void TranslationTransform(pov_vector<DBL>&);
    void RotationTransform(const pov_vector<DBL>&);
    void Compose(Transformation&);
    void AxisRotationTransform(const pov_vector<DBL>&, DBL);
    void CoordinateTransform(pov_vector<DBL>&, pov_vector<DBL>&, DBL, DBL);
};

#endif /* __INC_MATRICES_H__ */