he folks, I am struggeling with a nested loop problem, or at least thats what i think i am struggeling with^^....
I try to display (on screen) only every 5th value of a loop - I solved it with an if statement but this is very bad coding i think^^
any help would be greatly appreciated
thx

1. PFont font;
   float[] numbersPed;
   float[] numbersCar;
   int m1, m2; // number of steps
   float t2; // angle 
   float x, y, z;
   float xm;
   float ym;
   float r;
   float c1, c2;
   boolean button = false; /// fuers umschalten zwischen ped und cars
   
   void setup() {
     frameRate(27);
     font = loadFont("CordiaNew-bob.vlw");
     size(600, 600);
     smooth();
     xm = width/2;
     ym = height/2;
   
     String[] lines= loadStrings("08082012__a.txt");
     numbersPed = new float[lines.length];
     numbersCar = new float[lines.length];
     for (int i =0; i< lines.length; i = i+2) {
       numbersPed[i] = float(lines[i]);
     }
     for (int i =1; i< lines.length; i = i+2) {
       numbersCar[i] = float(lines[i]);
     }
   }
   
   void draw() {
     m2 = numbersPed.length;
     t2 = 2*PI/m2;
     if (button) {
       c1 = 255;
       c2 = 50;
     }
     else {
       c1 = 50;
       c2 = 255;
     }
   
     background(255);
     strokeWeight(1);
     noFill();
     for (int i=0; i<=numbersPed.length-1; i+=2) {       
       x=xm+r*sin(t2*i);      
       y=ym+r*cos(t2*i);
       //println(numbersPed[i]);
       stroke(numbersPed[i]*15, 0, 0, c1);
       r=numbersPed[i]*22;
       line(x, y, width/2, height/2);
       fill(0);
       float intervall = i;
       float time = 8+ 0.1*intervall;
       textAlign(LEFT);
       if(time>24){
         time=time-24;
       }
      ////////////// for ( int j =0; j<numbersPed.length; j=j+5){/////////////////////////////
       if (i==0||i==5||i==10||i==15||i==20||i==25||i==30||i==35||i==40||i==45||i==50||i==55
         ||i==60||i==65||i==70||i==75||i==80||i==85||i==90||i==95||i==100||i==105||i==110||i==115
         ||i==120||i==125||i==130||i==135||i==140||i==145||i==150||i==155||i==160||i==165||i==170
         ||i==175||i==180||i==185||i==190||i==195||i==200||i==205||i==210||i==215||i==220||i==225
         ||i==230||i==235||i==240||i==245) {
         text(int(time)+ ":" + "00", x, y);
       }
     }
   
     for (int i=1; i<=numbersCar.length-1; i+=2) {       
       x=xm+r*sin(t2*i);      
       y=ym+r*cos(t2*i);
       // println(numbersCar[i]);
       stroke(numbersCar[i]*15, 0, 0, c2);
       r=numbersCar[i]*22;
       line(x, y, width/2, height/2);
     }
     // noLoop();
   }
   
   void mousePressed() {
     button = !button;
   }
   
   

he folks, i am rather new to processing and I stuck with a problem. I try to visualize a motion detection with a line like a seismograph - so the line should grow over time. I tried a lot but it seems I am stumped. I post the most clear code with no experiments...
Any help is very appreciated.
ty B

1. import processing.video.*;
   Timer timer;
   PImage prevFrame;
   Capture video;
   
   int totalTime = 500;
   int arrayLength = totalTime/int(frameRate);
   float[] r1 = new float[arrayLength];
   float threshold = 30;
   int x = 0;
   
   void setup() {
     size(320, 240);
     smooth();
     background(0);
     video = new Capture(this, width, height, 5);
     prevFrame = createImage(video.width, video.height, RGB);
     timer = new Timer(totalTime);
     timer.start();
     for (int i = 0; i < r1.length; i++) {
       r1[i]=0;
     }
   }
   
   void draw() {
   
     if (video.available()) {
       prevFrame.copy(video, 0, 0, video.width, video. height, 0, 0, video.width, video.height);
       prevFrame.updatePixels();
       video.read();
     }
   
     loadPixels();
     video.loadPixels();
     prevFrame.loadPixels();
     //// motion detection
     float totalMotion = 0;
     for (int i = 0; i <video.pixels.length; i++) {
       color fgColor = video.pixels[i];
       color bgColor = prevFrame.pixels[i];
       float r1 = red(fgColor);
       float g1 = green(fgColor);
       float b1 = blue(fgColor);
       float r2 = red(bgColor);
       float g2 = green(bgColor);
       float b2 = blue(bgColor);
   
       float diff = dist(r1, g1, b1, r2, g2, b2);
       totalMotion += diff;
     }
   
     float avgMotion =totalMotion/video.pixels.length;
   
   
     /// average motion over certain time
     for (int i = 0; i < r1.length-1; i ++ ) {
       r1[i] = r1[i+1];
     }
     r1[r1.length-1]=avgMotion;
     float sum = 0;
     for (int i = 0; i < r1.length; i++) {
       sum +=r1[i];
     }
   
     float avgMinute = sum/(totalTime/100);
   
     float r = avgMotion*2;
   
     if (timer.isFinished()) {
       println(avgMinute);
       x+=5;
       stroke(255);
       noFill();
       strokeWeight(1);
      
       //// draw spline
       beginShape();
       curveVertex(x, avgMinute);
       endShape();
       timer.start();
     }
   }