Simplex.java

public class Simplex {
    private final Double[][] matEcart;
    private int width;
    private int height;

    public int getWidth() {
        return width;
    }

    public void setWidth(int width) {
        this.width = width;
    }

    public int getHeight() {
        return height;
    }

    public void setHeight(int height) {
        this.height = height;
    }

    public Double getMatEcartById(int i, int j) {
        return matEcart[i][j];
    }

    public Double[][] getMatEcart() {
        return matEcart;
    }

    public void setMatEcartById(Double d, int i, int j) {
        matEcart[i][j] = d;
    }

    public Simplex(int w, int h) {
        this.width = w;
        this.height = h;
        this.matEcart = new Double[w][h];
    }

    public Simplex() {
        this.width = 0;
        this.height = 0;
        this.matEcart = new Double[0][0];
    }

    void printSimplex() {
        System.out.println("Tableau: ");
        for (int i = 0; i < width; i++) {
            for (int j = 0; j < height; j++) {
                if (matEcart[i][j] < 0.0)
                    System.out.print(matEcart[i][j] + " ");
                else
                    System.out.print(" " + matEcart[i][j] + " ");
            }
            System.out.println();
        }
    }

    void createMatEcart(Equation eq) {
        int nbContraintes = eq.getNbContraintes();
        // Matrice Amxn
        for (int i = 0; i < width; i++) {
            for (int j = 0; j < height; j++) {
                if (j < nbContraintes) {
                    setMatEcartById(eq.getMatAtId(i, j), i, j);
                } else {
                    setMatEcartById(j - nbContraintes == i ? 1.0 : 0.0, i, j);
                }
            }
        }

        // Membre de droite
        for (int i = 0; i <= nbContraintes; i++)
            setMatEcartById(eq.getRightVec().get(i), i, height-1);

        // Fonction obj
        for (int i = 0; i < nbContraintes; i++)
            setMatEcartById(eq.getFuncObj().get(i), width-1, i);

        // overwrite la mat en bas à droite qui est à 1
        setMatEcartById(0.0, width - 1, height - 1);
    }

    /**
     * Si b[i] < 0 phase 1 sinon phase 2
     * @return true = phase 1 | false = phase 2
     */
    boolean which_phase(){
        boolean res = true;
        for (int i = 0; i < width; i++) {
            if(!signe(matEcart[i][height - 1]))
                res = false;
        }
        return res;
    }
    void tabAux() {

    }

    void pivot() {

    }

    boolean signe(Double x) {
        return x >= 0;
    }
}