35C3_Teststrecke/lichtschranke/speedshow/speedshow.pde

import processing.serial.*;
import processing.net.*;
import java.io.FileWriter;
import java.io.*;
import java.util.*;
import spout.*;

boolean spoutactive=true;
Spout spout;
PFont fontregular;
PImage image_line;
Serial myPort;
Server myServer;
String val = "0.0";
int speeds_show=10;
float[] speeds=new float[speeds_show];
int speeds_index=0; //points to next array index
float speedfloat=0;
float triggerspeedmin=15; //current triggerspeed
int unitdisplay=0;
int unitdisplay_count=9; //how much different units available
int xtextstart=10;

void setup() {
  size(800, 600, P3D);
  frameRate(30);
  
  fontregular=createFont("Montserrat-Regular.ttf",64);
  textFont(fontregular);
  
  myServer = new Server(this, 2323);
  image_line = loadImage("bleeptrackline.png");
  
  //String portName = "COM5";
  //String portName = "/dev/ttyUSB0";
  int useportID=-1;
  println("Serialports:");
  for(int i=0;i<Serial.list().length;i++){
    if (Serial.list()[i].contains("ttyUSB") || Serial.list()[i].contains("COM")){
      println(i+" "+Serial.list()[i]);
      if (useportID<0){ //no port set yet
        useportID=i;
      }
    }
  }
  String portName = Serial.list()[useportID];
  println("Using Port:"+portName);
  myPort = new Serial(this, portName, 115200);
  
  sendSpeedTrapValue(int(triggerspeedmin));
  
  background(0);
  
  
  if (spoutactive){
    spout=new Spout(this);
    spout.createSender("Spout Processing");
  }
}


// speed wird sein "20.08" oder

void draw() {
  if ( myPort.available() > 0) {
    String sread = myPort.readString();
    println("serialRead: " + sread);
    if (sread.length()>=7 && sread.substring(0,6).equals("speed=")){  //new speed measurement
      val = sread.substring(6,sread.length()-1);
    
      speedfloat=float(val);
      
      speeds[speeds_index]=speedfloat;
      speeds_index++;
      speeds_index%=speeds_show;
      
      Date d=new Date();
      
      println(d.getTime()+";"+speedfloat);
      //pw.println(d.getTime()+";"+speedfloat);
      //pw.flush();
      appendTextToFile("speeds.txt",d.getTime()+";"+speedfloat);
      
      unitdisplay=int(random(0,unitdisplay_count));
      println("unitdisplay: "+unitdisplay);
      
      triggerspeedmin=getTimesPercentile(0.8);
      //triggerspeedmin=getTimesMax();
      sendSpeedTrapValue(int(triggerspeedmin));
      
      myServer.write(str(speedfloat));
    }
    
  }
  
  background(0);
  fill(0,132,176);
  
  textSize(100);
  
  
  int xtext=xtextstart;
  int ytext=100;
  switch(unitdisplay){
    case 0:
      text(nf(speedfloat,1,2) + " km/h" , xtext, ytext);
      break;
    case 1:
      text(nf(speedfloat*0.621371,1,2) + " mph" , xtext, ytext);
      break;
    case 2:
      text(nf(speedfloat*0.000809848,1,6) + " Mach" , xtext, ytext);
      break;
    case 3:
      text(nf(speedfloat*0.911344,1,2) + " ft/s" , xtext, ytext);
      break;
    case 4:
      text(nf(speedfloat*0.277778,1,2) + " m/s" , xtext, ytext);
      break;
    case 5:
      text(nf(speedfloat*0.539957,1,2) + " knots" , xtext, ytext);
      break;
    case 6:
      text(nf(speedfloat*0.000000000926567,1,9) + " c" , xtext, ytext);
      break;
    case 7:
      text(nf(speedfloat*54.67469,1,0) + " ft/min" , xtext, ytext);
      break;
    case 8:
      text(nf(pow((speedfloat*0.277778/0.836), 2.0/3),1,0) + " Bft" , xtext, ytext);
      break;
      
   
  }
  
  
  //Line
  image(image_line, 10, 100);
  
  int reducesizefactor=40;
  int lastytextpos=200;
  
  for (int i=speeds_show;i>0;i--){
    float colorpercentage=i*1.0/speeds_show;
    fill(0,132*colorpercentage+163*(1-colorpercentage),176*colorpercentage+86*(1-colorpercentage));
    textSize(50-(1-colorpercentage)*reducesizefactor);
    text(  nf(speeds[(speeds_show+speeds_index-1+i)%speeds_show], 1,2) + " km/h",  xtextstart, lastytextpos);
    lastytextpos+=50-(1-colorpercentage)*reducesizefactor;
  }
  
  textSize(40);
  text( "speed trap: "+nf(triggerspeedmin,1,1) +" km/h", 10,  height-50);
  
  
  if (spoutactive){
    spout.sendTexture();
  }
  
}

float getTimesMax(){
  float speedmax=0;
  for (int i=0;i<speeds_show;i++){
    if (speedmax<speeds[i]){
      speedmax=speeds[i];
    }
  }
  return speedmax;
}

float getTimesPercentile(float p){ //p==1 would be max value
  float[] sortedspeeds=sort(speeds);
  return sortedspeeds[int(p*sortedspeeds.length)];
}

void sendSpeedTrapValue(int v){
  myPort.write(""+v+"\n");
  println("Send trigger speed:"+v);
}


void appendTextToFile(String filename, String text){
  File f = new File(dataPath(filename));
  if(!f.exists()){
    createFile(f);
  }
  try {
    PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(f, true)));
    out.println(text);
    out.close();
  }catch (IOException e){
      e.printStackTrace();
  }
}
void createFile(File f){
  File parentDir = f.getParentFile();
  try{
    parentDir.mkdirs(); 
    f.createNewFile();
  }catch(Exception e){
    e.printStackTrace();
  }
}