package Mat;

class Matrix2D
{
  
  public static Matrix createMatrix2D(double a,double b,double c,double d)
    {
      Matrix ret = new Matrix(2,2);
      ret.setCell(a,0,0);
      ret.setCell(b,0,1);
      ret.setCell(c,1,0);
      ret.setCell(d,1,1);
      return ret;
    }
  
  public static Matrix RotateMatrix(double kakudo,double kyori)
    {
      double kaku =(Math.PI)*(kakudo/180.0);
      return  createMatrix2D(Math.cos(kaku),(-1*Math.sin(kaku)),Math.sin(kaku),Math.cos(kaku));
    }
  
  public static Matrix rotate(Matrix mat,double kakudo)
    {
      double kyo = Math.sqrt(mat.getCell(0,0)*mat.getCell(0,0) + mat.getCell(0,1)*mat.getCell(0,1));
      System.out.println("kyo"+kyo);
      Matrix ma =Matrix2D.RotateMatrix(kakudo,kyo);

      System.out.println(
        ma.getCell(0,0)+" "+
        ma.getCell(0,1)+" "+
        ma.getCell(1,0)+" "+
        ma.getCell(1,1)+" "
        );

      return  RotateMatrix(kakudo,kyo).innerProduct(mat);
    }
  
  public Matrix scale()
    {
      return null;
    }

  public static void main(String args[])
    {
      Matrix mat= Matrix2D.createMatrix2D(1.0,1.0,1.0,1.0);
     Matrix mat0= Matrix2D.createMatrix2D(1.0,2.0,3.0,4.0);
      System.out.println(
        mat.getCell(0,0)+" "+
        mat.getCell(0,1)+" "+
        mat.getCell(1,0)+" "+
        mat.getCell(1,1)+" "
        );
      mat=Matrix2D.rotate(mat,30.0);
            System.out.println(
        mat.getCell(0,0)+" "+
        mat.getCell(0,1)+" "+
        mat.getCell(1,0)+" "+
        mat.getCell(1,1)+" "
        );
  
      
    }
  
}