import java.awt.Color;
import java.awt.Graphics;

public class JParabola extends JOxy {

	private double a, b, c;

	public double f(double x) {
		return a * x * x + b * x + c;
	}

	public JParabola() {
		a = 1.0;
		b = 0.0;
		c = 0.0;
	}

	public void paintComponent(Graphics g) {
		super.paintComponent(g);

		g.setColor(Color.BLUE);
		for (int i = 0; i < getWidth() - 1; i++) {
			double x1 = xr(i);
			double y1 = f(x1);
			double x2 = xr(i+1);
			double y2 = f(x2);
			g.drawLine(i, yg(y1), i + 1, yg(y2));
		}
	}

	public double getA() {
		return a;
	}

	public void setA(double a) {
		this.a = a;
	}

	public double getB() {
		return b;
	}

	public void setB(double b) {
		this.b = b;
	}

	public double getC() {
		return c;
	}

	public void setC(double c) {
		this.c = c;
	}

}