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Processing Beginners
1

Questions and discussions for people starting out with Processing

5

Hi, I Try to do a radar. But now I have an error: frame cannot be resolved to a variable. May be I have problems with my libryries or something like that. I believe you guys. If it will help the radar consist of: 2 ultrasonic sensors, 1 servo, 1 arduino nano. And here is the code:
import processing.serial.;
import static javax.swing.JOptionPane.;

Serial myPort; // The serial port
String serialin;
int data = new int[360];
PFont f;

final boolean debug = true;

void setup() {
String COMx, COMlist = “”;
size(1280, 720);
f = createFont(“Verdana”, 32, true); // Arial, 16 point, anti-aliasing on
textFont(f, 20);
frameRate(60);
for (int i = 0; i < 360; i++) {
data[i] = 0;
}
try {
if (debug) printArray(Serial.list());
int i = Serial.list().length;
if (i != 0) {
if (i >= 2) {
// need to check which port the inst uses -
// for now we’ll just let the user decide
for (int j = 0; j < i; ) {
COMlist += char(j+‘a’) + " = " + Serial.list()[j];
if (++j < i) COMlist += ", ";
}
COMx = showInputDialog(“Which COM port is correct? (a,b,…):\n”+COMlist);
if (COMx == null) exit();
if (COMx.isEmpty()) exit();
i = int(COMx.toLowerCase().charAt(0) - ‘a’) + 1;
}
String portName = Serial.list()[i-1];
if (debug) println(portName);
myPort = new Serial(this, portName, 9600); // change baud rate to your liking
myPort.bufferUntil(‘\n’); // buffer until CR/LF appears, but not required…
} else {
showMessageDialog(frame, “Device is not connected to the PC”);
exit();
}
}
catch (Exception e)
{ //Print the type of error
showMessageDialog(frame, “COM port is not available (may\nbe in use by another program)”);
println(“Error:”, e);
exit();
}
}

void draw() {
background(26, 26, 36, 200);
textSize(18);
stroke(255, 255, 255, 150);
fill(255, 50, 200, 200);
text(“Arduino RADAR 2D Visualization”, 20, 710);
text(hour(), 1050, 710);
text(“:”, 1075, 710);
text(minute(), 1085, 710);
text(“:”, 1110, 710);
text(second(), 1120, 710);
fill(36, 255, 100, 200);
strokeWeight(3);
circle(640, 360, 600);
circle(640, 360, 500);
circle(640, 360, 400);
circle(640, 360, 300);
circle(640, 360, 200);
circle(640, 360, 100);

for (int i = 0; i < 360; i++) {
fill(255, 10, 255, 200);
stroke(50, 10, 255, 150);
point(float(640) + (map_values(data[i]))*cos(radians(i)), float(360) + (map_values(data[i]))*sin(radians(i)));
}

while (myPort.available() > 0) {
serialin = myPort.readStringUntil(10);
try {
String serialdata = splitTokens(serialin, “,”);
if (serialdata[0] != null) {
serialdata[0] = trim(serialdata[0]);
serialdata[1] = trim(serialdata[1]);
serialdata[2] = trim(serialdata[2]);

    int i = int(serialdata[0]);
    data[179-i] = int(serialdata[1]);
    data[(179-i)+180] = int(serialdata[2]);
  }
} 
catch (java.lang.RuntimeException e) {
}

}
}

float map_values(float x) {
float in_min = 0, in_max = 200, out_min = 0, out_max = 700;
return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}