/* Mathematiques de l'informatique graphique    */
/* Translation 3D en coordonnees homogenes      */
/*                                              */
/* Auteur: Nicolas JANEY                        */
/* nicolas.janey@univ-fcomte.fr                 */
/* Mars 2019                                    */

#include <stdlib.h>
#include <stdio.h>
#include <math.h>

#include "TG3D.h"
#include "Tr3D.h"
#include "Dir3D.h"

/* Constructeurs                                */

Tr3D::Tr3D(void):TG3D() {
}

Tr3D::Tr3D(double tx,double ty,double tz):TG3D() {
  c[0][3] = tx;
  c[1][3] = ty;
  c[2][3] = tz;
}

Tr3D::Tr3D(Dir3D *d):TG3D() {
  c[0][3] = d->getx();
  c[1][3] = d->gety();
  c[2][3] = d->getz();
}

Tr3D::Tr3D(Tr3D *tr):TG3D(tr) {
}

/* Destructeur                                  */

Tr3D::~Tr3D(void) {
}

/* Setter                                       */

bool Tr3D::set(double m[4][4]) {
  if ( estTranslation(m) ) {
    TG3D::set(m);
    return true; }
  return false;
}

/* Test si une matrice 4x4 de double            */
/* est representative d'une translation         */

bool Tr3D::estTranslation(double m[4][4]) {
  return ( ( m[0][0] == 1.0 ) &&
           ( m[1][1] == 1.0 ) &&
           ( m[2][2] == 1.0 ) &&
           ( m[3][3] == 1.0 ) &&
           ( m[0][1] == 0.0 ) &&
           ( m[0][2] == 0.0 ) &&
           ( m[1][0] == 0.0 ) &&
           ( m[1][2] == 0.0 ) &&
           ( m[2][0] == 0.0 ) &&
           ( m[2][1] == 0.0 ) &&
           ( m[3][0] == 0.0 ) &&
           ( m[3][1] == 0.0 ) &&
           ( m[3][2] == 0.0 ) );
}