Without drawing, why

You probably just can't see it, since you didn't change the current color between filling the shape and drawing it.

I also notice that you have a commented p.closePath() command after invoking draw(). If you want the path to be closed, then you should close it _before_ you use it. The call to closePath() does not actually draw anything, it merely sets up the path to be closed so that later draw commands that utilize it will draw it as such.

markt1964a at 2007-7-29 17:49:41 >

import java.awt.*;

import java.awt.geom.GeneralPath;

import javax.swing.*;

import java.util.Random;

public class DrawRx extends JPanel {

private double xCells[][];

private double yCells[][];

private double red[][];

private double green[][];

private double blue[][];

int width = 400;

int height = 400;

public DrawRx() {

this.setBackground( Color.WHITE );

}

// Look up this method signature in JComponent class api */

protected void paintComponent(Graphics g) {

super.paintComponent( g );

//this.setBackground( Color.WHITE ); Don't do this here

Graphics2D g2d = (Graphics2D)g;

g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,

RenderingHints.VALUE_ANTIALIAS_ON);

double theta = Math.PI/8.0;

// Move to upper left corner.

double cos = Math.abs(Math.cos(theta));

double sin = Math.abs(Math.sin(theta));

double rw = width*cos + height*sin;

double rh = height*cos + width*sin;

double x = (rw-width)/2;

double y = (rh-height)/2;

g2d.translate(x,y);

g2d.rotate(theta, width/2, height/2);

drawSides(g2d);

}

public void drawSides(Graphics2D g2d){

g2d.setColor(Color.GRAY);

int id = 0;

Random generator = new Random();

xCells = new double[100][25];

yCells = new double[100][25];

red= new double[100][25];

green = new double[100][25];

blue= new double[100][25];

for(int i = 0;i<100;i++){

for(int j = 0; j<25;j++){

xCells[i][j]=generator.nextDouble()*width;

yCells[i][j]=generator.nextDouble()*height;

}

red[i][id]= generator.nextDouble();

green[i][id] = generator.nextDouble();

blue[i][id] = generator.nextDouble();

}

for (int i = 0; i<100; i++){

GeneralPath p = new GeneralPath(GeneralPath.WIND_EVEN_ODD,

xCells[i].length);

p.moveTo((float)xCells[i][0],(float)yCells[i][0]);

for (int j = 1; j<25; j++){

p.lineTo((float)xCells[i][j],(float)yCells[i][j]);

}

p.closePath();

float r = (float)red[i][id];

float g = (float)green[i][id];

float b = (float)blue[i][id];

g2d.setPaint(new Color(r, g, b));

g2d.fill(p);

// Adding this next line was suggested by markt1964:

// "change the current color between filling the

// shape and drawing it"

g2d.setPaint(Color.blue);

g2d.draw(p);

}

}

public static void main(String argv[]) {

final DrawRx demo = new DrawRx();

JFrame f = new JFrame("Java 2D(TM) Demo - Append");

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

f.setSize(700,700);

f.add("Center", demo);

f.setVisible(true);

}

}

crwooda at 2007-7-29 17:49:41 >