Adding Radar sweep line to code.

herrmant

I am building a weather radar based on Grook.nets code for an ultrasonic sensor, however, I am not using a ultrasonic sensor. I have modified the code in many ways... The radar currently can detect heavy rain/hail at about 40 mi. I would like to add a sweep line for effects on the screen. Could anyone help me out? I am attaching my code. Thank you.

int cx; 
int cy; 
int r = 200;
int x = new int[100];
int y = new int[100];

import processing.serial.*;
Serial port;
Serial port2;
String data = "";
String Radius = "";
String Theta = "";
int index = 0;
float distance = 9000;
float angle = 10;
float pi = 22.0/7;

PImage img;



void setup() {
  size(600, 600);
  cx = width/2;
  cy = height/2;
  size(1000, 800);
  background(100);
  ellipse(500, 500, 1000, 1000);
  line(500, 0, 500, 1000);
  line(0, 500, 1000, 500);
  line(500, 500, 1000, 0);
  line(500, 500, 1, 1);
  img = loadImage("MAP3.png");
  tint(255, 1);
}
{



  port = new Serial(this, "COM3", 9600);
  port.bufferUntil('.');
}

void draw() {
  background (0);
  stroke(0, 200, 0); 
  float t = millis()/1500; 
  for (int i = 0; i < 100; i++) {
    x[i] =(int) (cx+r*cos(t - i*0.01)); 
    y[i] =(int) (cy+r*sin(t - i*0.01));
    stroke(0, 200 - i * 2, 0); 
    line(cx, cy, x[i], y[i]);
  }


  image(img, 0, 0);
}

void serialEvent(Serial port)
{

  data = port.readStringUntil('.');
  data = data.substring(0, data.length() - 1);  
  index = data.indexOf(",");
  Radius = data.substring(0, index);
  Theta = data.substring (index+1, data.length());

  translate(500, 500);
  point (1, 1);

  distance = float(Radius); 
  angle = float(Theta) /180 * pi; 
  fill(10, 600, 20);
  ellipse(distance * cos(angle), -1 * distance * sin(angle), 40, 20);

  fill(98, 245, 31);


  noStroke();
  fill(8, 3); 
  rect(1000, 1, width, 1010);

  fill(98, 800, 31);
}
`
Thanks for any help. Initial code written by Grook.net. Modified by Tim Herrman.

Here is a link to an image showing what I want to do.

http://www.bing.com/images/search?q=Radar+Sweep&view=detailv2&&id=22EB8F2D6B4A7022F64E3C9B07F1499647F2F8D1&selectedIndex=23&ccid=3s8XPcDD&simid=608046625551091599&thid=OIP.Mdecf173dc0c37904ea95e802d6180293o0&ajaxhist=0

Ater

Please, format your code correctly, select entire code and hit "C" button above text area.

Here's code of just simple radar sweep line:

int cx; 
int cy; 
int r = 200;
int x = new int[100];
int y = new int[100];

void setup() {
  size(600, 600);
  cx = width/2;
  cy = height/2;
}
void draw() {
  background (0);
  stroke(0,200,0); 
  float t = millis()/1500; 
  for(int i = 0; i < 100; i++){
     x[i] =(int) (cx+r*cos(t - i*0.01)); 
     y[i] =(int) (cy+r*sin(t - i*0.01));
     stroke(0, 200 - i * 2, 0); 
     line(cx, cy, x[i], y[i]);
  }
}

herrmant

Thank you for your prompt response. I am getting an error when running the new code. The error says cannot convert int to int(). Any help would be greatly appreciated and thank you again.

GoToLoop

The error says cannot convert int to int().

@herrmant, that error message was mistyped. Correct message:
"cannot convert from int[] to int"

In order to fix it, declare fields x & y as arrays of int:

final int[] x = new int[100];
final int[] y = new int[100];

herrmant

Ok, thank you for your help. The program now runs. However, would there be a a way to remove the previous sweeps as it makes the radar image unreadable where the sweep is. Again thank you and any additional help is appreciated.

Ater

Oh.. Sorry, I didn't think you gonna really use it. Change this linestroke(0, 200 - i * 2, 0); to stroke(0, 200, 0, 200 - i * 2); something like that, you can play with numbers to adjust everything. For example r means radius..

herrmant

I think I got it, I used a different code form this link,

https://forum.processing.org/two/discussion/11360/need-help-creating-a-sweep-line-for-radar-simulation

And I changed the color and length and got this result--