nes-proj/examples/z1/rssi_scanner/ViewRSSI3D.java

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Java
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2011-03-03 12:55:33 +00:00
/**
* 3D RSSI Viewer - view RSSI values of 802.15.4 channels
* ---------------------------------------------------
* Note: run the rssi-scanner on a Sky or sentilla node connected to USB
* then start with
* make login | java ViewRSSI3D
*
* @author Joakim Eriksson, SICS
*
*/
import java.io.*;
import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
public class ViewRSSI3D extends JPanel {
public InputStream inputstr;
public static final int WIDTH = 6;
public static final int HEIGHT = 4;
public static final int MAX_HISTORY = 50;
public static final int MAX_VALUES = 86;
private int[][] values = new int[MAX_HISTORY][MAX_VALUES];
private int pos = 0;
public ViewRSSI3D() {
super(null);
setBackground(Color.black);
setOpaque(true);
setPreferredSize(new Dimension(800, 400));
}
long last = 0;
Polygon pol = new Polygon();
float[] dist = {0.0f, 0.3f, 0.6f, 1.0f};
Color[] colors = {Color.RED, Color.YELLOW, Color.GREEN, Color.BLUE};
int[] lastPos = new int[MAX_VALUES];
public void paint(Graphics g) {
//long t = System.currentTimeMillis();
Graphics2D gfx = (Graphics2D) g;
gfx.setColor(Color.black);
gfx.fillRect(0, 0, getWidth(), getHeight());
int oldPos = 0;
int oldJPos = 0;
int lastColor = -1;
int w = (getWidth() - MAX_HISTORY * 4) / MAX_VALUES;
int h = w * HEIGHT / WIDTH;
w = (getWidth() - MAX_HISTORY * h) / MAX_VALUES;
int xs = h * MAX_HISTORY;
int ys = (getHeight() - h * MAX_HISTORY) / 2;
for (int i = 0, n = MAX_HISTORY; i < n; i++) {
Point2D start = new Point2D.Float(xs - i * h, ys - 100 + i * h);
Point2D end = new Point2D.Float(xs - i * h, ys + i * h);
LinearGradientPaint p =
new LinearGradientPaint(start, end, dist, colors);
gfx.setPaint(p);
for (int j = 0, m = MAX_VALUES; j < m; j++) {
int val = (int) values[(i + pos) % MAX_HISTORY][j];
if (i > 0 && j > 0) {
pol.reset();
pol.addPoint(xs + (j - 1) * w - i * h, ys + i * h - oldPos);
pol.addPoint(xs + j * w - i * h, ys + i * h - val);
pol.addPoint(xs + j * w - (i - 1) * h,
ys + (i - 1) * h - lastPos[j]);
pol.addPoint(xs + (j - 1) * w - (i - 1) * h,
ys + (i - 1) * h - oldJPos);
gfx.fillPolygon(pol);
}
oldPos = val;
oldJPos = lastPos[j];
}
gfx.setColor(Color.black);
for (int j = 0, m = MAX_VALUES; j < m; j++) {
int val = (int) values[(i + pos) % MAX_HISTORY][j];
if (i > 0 && j > 0) {
pol.reset();
pol.addPoint(xs + (j - 1) * w - i * h, ys + i * h - oldPos);
pol.addPoint(xs + j * w - i * h, ys + i * h - val);
pol.addPoint(xs + j * w - (i - 1) * h,
ys + (i - 1) * h - lastPos[j]);
pol.addPoint(xs + (j - 1) * w - (i - 1) * h,
ys + (i - 1) * h - oldJPos);
gfx.drawPolygon(pol);
}
oldPos = val;
oldJPos = lastPos[j];
lastPos[j] = val;
}
}
gfx.setColor(Color.gray);
gfx.drawLine(xs - (MAX_HISTORY - 1) * h, ys + (MAX_HISTORY - 1) * h,
xs - (MAX_HISTORY - 1) * h + (MAX_VALUES - 1) * w,
ys + (MAX_HISTORY - 1) * h);
gfx.drawLine(xs - (MAX_HISTORY - 1) * h + (MAX_VALUES - 1) * w,
ys + (MAX_HISTORY - 1) * h,
xs + (MAX_VALUES - 1) * w, ys);
// System.out.println("Time: " + (System.currentTimeMillis() - t) + " last: " + (System.currentTimeMillis() - last));
// last = System.currentTimeMillis();
}
public void handleInput() throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); while(true) {
String line = reader.readLine();
if (line != null && line.startsWith("RSSI:")) {
try {
String[] parts = line.substring(5).split(" ");
for (int i = 0, n = parts.length; i < n; i++) {
values[pos][i] = Integer.parseInt(parts[i]);
}
} catch (Exception e) {
e.printStackTrace(); /* Report error, but do not fail... */
}
pos = (pos + 1) % MAX_HISTORY;
repaint();
}
}
}
public static void main(String[] args) throws IOException {
ViewRSSI3D mc = new ViewRSSI3D();
JFrame window = new JFrame("3D RSSI Viewer");
window.add(mc);
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.pack();
window.setVisible(true);
mc.handleInput();
}
}