import java.io.Serializable ;

/* ************************************ */
/*         Classe matrice 4x4           */
/* ************************************ */
public class Matrice implements Serializable {
  public float m[][] = new float[4][4] ;

  public void annulle() {
    for ( int i = 0 ; i < 4 ; i++ )
      for ( int j = 0 ; j < 4 ; j++ )
        m[i][j] = 0.0F ;
  }

  public void identite() {
    for ( int i = 0 ; i < 4 ; i++ )
      for ( int j = 0 ; j < 4 ; j++ )
        m[i][j] = ( i == j ) ? 1.0F : 0.0F ;
  }

  public void aleatoire() {
    for ( int i = 0 ; i < 4 ; i++ )
      for ( int j = 0 ; j < 4 ; j++ )
        m[i][j] =(float) Math.random() ;
  }

  public String toString() {
    return("Matrice : "+m[0][0]+" "+m[0][1]+" "+m[0][2]+" "+m[0][3]+"\n          "+
           m[1][0]+" "+m[1][1]+" "+m[1][2]+" "+m[1][3]+"\n          "+
           m[2][0]+" "+m[2][1]+" "+m[2][2]+" "+m[2][3]+"\n          "+
           m[3][0]+" "+m[3][1]+" "+m[3][2]+" "+m[3][3]) ;
  }
}