package ru kpfu itis group11402 batyrova Task052 import ru kpfu itis g

package ru.kpfu.itis.group11402.batyrova.Task052;

import ru.kpfu.itis.group11402.batyrova.Task049.Vector2D;

/**
 * Created by DNS on 19.11.2014.
 */
public class Matrix2x2 {
    private double[][]matrix = new double[2][2];

    public double[][] getMatrix() {
        return matrix;
    }

    public void setMatrix(double[][] matrix) {
        this.matrix = matrix;
    }

    public Matrix2x2() {
        this(new double[][]{{0,0},{0,0}});
    }
    public Matrix2x2(double c) {
        this(new double[][]{{c,c},{c,c}});
    }
    public Matrix2x2(double[][] matrix) {
        this.matrix = matrix;
    }
    public Matrix2x2(double b1, double b2, double b3, double b4) {
        this(new double[][]{{b1,b2},{b3,b4}});
    }
    public Matrix2x2 add(Matrix2x2 matr) {
        Matrix2x2 result = new Matrix2x2();
        for (int i = 0; i < 2; i++) {
            for (int j = 0; j < 2; j++) {
                result.matrix[i][j] = this.matrix[i][j] + matr.getMatrix()[i][j];
            }
        }
        return result;
    }
    public void add2(Matrix2x2 matr) {
        for (int i = 0; i < 2; i++) {
            for (int j = 0; j < 2; j++) {
                this.matrix[i][j] += matr.getMatrix()[i][j];
            }
        }
    }
    public Matrix2x2 sub(Matrix2x2 matr) {
        Matrix2x2 result = new Matrix2x2();
        for (int i = 0; i < 2; i++) {
            for (int j = 0; j < 2; j++) {
                result.matrix[i][j] = this.matrix[i][j] - matr.getMatrix()[i][j];
            }
        }
        return result;
    }
    public void sub2(Matrix2x2 matr) {
        for (int i = 0; i < 2; i++) {
            for (int j = 0; j < 2; j++) {
                this.matrix[i][j] -= matr.getMatrix()[i][j];
            }
        }
    }
    public Matrix2x2 multNumber(double v) {
        Matrix2x2 result = new Matrix2x2();
        for (int i = 0; i < 2; i++) {
            for (int j = 0; j < 2; j++) {
                result.matrix[i][j] = this.matrix[i][j] * v;
            }
        }
        return result;
    }
    public void multNumber2(double v) {
        for (int i = 0; i < 2; i++) {
            for (int j = 0; j < 2; j++) {
                this.matrix[i][j] *= v;
            }
        }
    }
    public Matrix2x2 mult(Matrix2x2 matr) {
        Matrix2x2 result = new Matrix2x2();
        for (int i = 0; i < 2; i++) {
            for (int j = 0; j < 2; j++) {
                for (int k = 0; k < 2; k++) {
                    result.matrix[i][j] += this.matrix[i][k] * matr.getMatrix()[k][j];
                }
            }
        }
        return result;
    }
    public void mult2(Matrix2x2 matr) {
        this.matrix = this.mult(matr).getMatrix();
    }
    public double det() {
        return matrix[0][0] * matrix[1][1] - matrix[0][1] * matrix[1][0];
    }
    public void transpon() {
        double c = matrix[0][1];
        matrix[0][1] = matrix[1][0];
        matrix[1][0] = c;
    }
    public Matrix2x2 inverseMatrix() {
        if (this.det() == 0) {
            System.out.println("Обратной матрицы не существует");
            return new Matrix2x2();
        } else {
            Matrix2x2 mt = new Matrix2x2();
            mt.matrix[0][0] = this.matrix[1][1] / this.det();
            mt.matrix[1][1] = this.matrix[0][0] / this.det();
            mt.matrix[0][1] = - this.matrix[1][1] / this.det();
            mt.matrix[1][0] = - this.matrix[1][1] / this.det();
            return mt;
        }
    }
    public Matrix2x2 equivalentDiagonal() {
        Matrix2x2 mt = new Matrix2x2();
        mt.matrix[0][0] = this.matrix[0][0] * this.matrix[1][1] - this.matrix[0][1] * this.matrix[0][0];
        mt.matrix[1][1] = this.matrix[1][1];
        mt.matrix[0][1] = 0;
        mt.matrix[1][0] = 0;
        return mt;
    }
    public Vector2D multVector(Vector2D vect) {
        return new Vector2D (vect.getX() * matrix[0][0] + vect.getX() * matrix[0][1], vect.getY() * matrix[1][0] + vect.getY() * matrix[1][1]);
    }
}