private void doCurrentMethodStep() {
switch (type) {
case 0: // bisectiei
if (Math.abs(function.evaluate((Cn.lastElement()).x)) < err) {
complete = true;
theTimer.stop();
} else if (function.evaluate((An.lastElement()).x) * function.evaluate((Cn.lastElement()).x)
< 0) {
Bn.add(Cn.lastElement());
Cn.add(new PointDP(((An.lastElement()).x + (Bn.lastElement()).x) / 2, 0.0));
} else {
An.add(Cn.lastElement());
Cn.add(new PointDP(((An.lastElement()).x + (Bn.lastElement()).x) / 2, 0.0));
}
break;
case 1: // coardei
{
double evn = function.evaluate((An.lastElement()).x);
if (Math.abs(evn) < err) {
complete = true;
theTimer.stop();
} else {
double ev0 = function.evaluate((An.firstElement()).x);
double newVal = (An.firstElement().x * evn - An.lastElement().x * ev0) / (evn - ev0);
An.add(new PointDP(newVal, 0.0));
}
}
break;
case 2: // secantei
{
double exn = function.evaluate((An.lastElement()).x);
if (Math.abs(exn) < err) {
complete = true;
theTimer.stop();
} else {
double exn1 = function.evaluate((An.elementAt(An.size() - 2)).x);
double newVal =
(An.elementAt(An.size() - 2).x * exn - (An.lastElement()).x * exn1) / (exn - exn1);
An.add(new PointDP(newVal, 0.0));
}
}
break;
case 3: // newton
double xn = An.lastElement().x;
if (Math.abs(function.evaluate(xn)) < err) {
complete = true;
theTimer.stop();
}
An.add(new PointDP(xn - function.evaluate(xn) / function.evaluate_1(xn), 0.0));
break;
}
}
public void paintComponent(Graphics g) {
Graphics2D g2d = (Graphics2D) g.create();
g2d.setStroke(new BasicStroke(1.0f));
if (isOpaque()) {
g2d.setColor(getBackground());
g2d.fillRect(0, 0, getWidth(), getHeight());
}
g2d.setColor(Color.black);
g2d.drawLine(0, frameHeight / 2, frameWidth, frameHeight / 2);
g2d.drawLine(frameWidth / 2, 0, frameWidth / 2, frameHeight);
for (int i = unityX; i < frameWidth / 2; i += unityX) {
g2d.drawLine(
frameWidth / 2 + i, frameHeight / 2 - 3, frameWidth / 2 + i, frameHeight / 2 + 3);
g2d.drawLine(
frameWidth / 2 - i, frameHeight / 2 - 3, frameWidth / 2 - i, frameHeight / 2 + 3);
}
for (int i = unityY; i < frameHeight / 2; i += unityY) {
g2d.drawLine(
frameWidth / 2 - 3, frameHeight / 2 + i, frameWidth / 2 + 3, frameHeight / 2 + i);
g2d.drawLine(
frameWidth / 2 - 3, frameHeight / 2 - i, frameWidth / 2 + 3, frameHeight / 2 - i);
}
g2d.setColor(Color.blue);
function.drawFunctionToGraphic(g2d, frameWidth, frameHeight, unityX, unityY);
paintCurrentMethodState(g2d);
g2d.dispose();
}