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