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Matrix4.h

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/***************************************************************************
 *cr                                                                       
 *cr            (C) Copyright 1995-2019 The Board of Trustees of the           
 *cr                        University of Illinois                       
 *cr                         All Rights Reserved                        
 *cr                                                                   
 ***************************************************************************/

/***************************************************************************
 * RCS INFORMATION:
 *
 *      $RCSfile: Matrix4.h,v $
 *      $Author: johns $        $Locker:  $             $State: Exp $
 *      $Revision: 1.42 $       $Date: 2019/01/17 21:21:00 $
 *
 ***************************************************************************
 * DESCRIPTION:
 *
 * 4 x 4 Matrix, used for a transformation matrix.
 *
 ***************************************************************************/
#ifndef MATRIX_FOUR_H
#define MATRIX_FOUR_H

class Matrix4 {
public:
  Matrix4(void) { identity(); }                
  Matrix4(float f) { constant(f); }            
  Matrix4(const float *m);                     
  Matrix4(const Matrix4& m) { loadmatrix(m); } 
  ~Matrix4(void) {}                            
  float mat[16];                               

  void multpoint3d(const float[3], float[3]) const;

  void multpointarray_3d(int numpts, const float *, float *) const;

  void multnorm3d(const float[3], float[3]) const;

  void multplaneeq3d(const float[3], float[3]) const;

  void multpoint4d(const float[4], float[4]) const;

  void identity(void);
  
  void constant(float);
  
  int inverse(void);
  
  void transpose(void);
  
  void loadmatrix(const Matrix4 &m);
  Matrix4& operator=(const Matrix4& m) {loadmatrix(m); return *this;}

  void multmatrix(const Matrix4 &);

  void rot(float, char); // angle in degrees

  void rotate_axis(const float axis[3], float angle);
  
  void transvec(float x, float y, float z);
 
  void transvecinv(float x, float y, float z);

  void translate(float, float, float);
  void translate(float d[3]) { translate(d[0], d[1], d[2]); }

  void scale(float, float, float);
  void scale(float f) { scale(f, f, f); }

  void window(float, float, float, float, float, float);

  void ortho(float, float, float, float, float, float);

  void ortho2(float, float, float, float);

  void lookat(float, float, float, float, float, float, short);
};

void trans_from_rotate(const float mat3[9], Matrix4 *mat4);

void print_Matrix4(const Matrix4 *mat4);

#endif

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