ix the code below so that there is a function that calculate the height of the triangle.
Fix the code below so that there is a function that calculate the height of the triangle.
package recursion;
import javax.swing.*;
import java.awt.*;
/**
* Draw a Sierpinski Triangle of a given order on a JPanel.
*
*
*/
public class SierpinskiPanel extends JPanel {
private static final int WIDTH = 810;
private static final int HEIGHT = 830;
private int order;
/**
* Construct a new SierpinskiPanel.
*/
public SierpinskiPanel(int order) {
this.order = order;
this.setMinimumSize(new Dimension(WIDTH, HEIGHT));
this.setMaximumSize(new Dimension(WIDTH, HEIGHT));
this.setPreferredSize(new Dimension(WIDTH, HEIGHT));
}
public static double height(double size) {
double h = (size * Math.sqrt(3)) / 2.0;
return h;
}
/**
* Draw an inverted triangle at the specified location on this JPanel.
*
* @param x the x coordinate of the upper left corner of the triangle
* @param y the y coordinate of the upper left corner of the triangle
* @param size the width and height of the triangle
* @param g the graphics object on which to draw the triangle
*/
private void drawTriangle(int x, int y, int size, Graphics g) {
Polygon triangle = new Polygon();
double h = height(size);
triangle.addPoint(x, y);
triangle.addPoint(x - size /2, (int) (y + h));
triangle.addPoint(x + size / 2, (int) (y + h));
g.fillPolygon(triangle);
}
/**
* Draw a Sierpinski triangle of the specified order at the specified location
* on this JPanel.
*
* @param order the order of the Sierpinski triangle to draw.
* @param x the x coordinate of the upper left corner of the central order 1 triangle
* @param y the y coordinate of the upper left corner of the central order 1 triangle
* @param size the width and height of the triangle
* @param g the graphics object on which to draw the triangle
*/
private void drawSierpinski(int order, int x, int y, int size, Graphics g) {
// fill in this method.
/*
* You'll want to make use of the drawTriangle method to do the
* actual drawing of the triangles.
*/
drawTriangle(x, y, size, g);
if (order == 1) {
} else {
drawSierpinski(order - 1, x + size / 4, y - size / 2, size / 2, g);
drawSierpinski(order - 1, x - size / 4, y + size / 2, size / 2, g);
drawSierpinski(order - 1, x + 3 * size / 4, y + size / 2, size / 2, g);
}
}
/**
* Override the paintComponent method so that each time the JPanel is painted on
* the screen we can draw the Sierpinski Triangle on the JPanel.
*
* @param g the graphics object on which to draw the triangle.
*/
public void paintComponent(Graphics g) {
g.setColor(Color.BLACK);
drawSierpinski(order, 205, 425, 400, g);
}
/*
* NOTE: Some code adopted/adapted from an earlier COMP132 lab created by
* Tim Wahls who in turn borrowed some of the code from Robert Sedgewick.
*/
}
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