using an arrayList to keep track and create alot of different classes.

alecburns

heres the code I'm getting a null pointer exception on line 73 and I don't know what is wrong. im trying to get this thing to run so i can fix it up.

/* alec burns * love data visualization project * 6/19/2015

• this program reads through text files that have
• lines with love in them from a single document or text book
• creates a visualization for them each text represented by a
• glowing particle that fades in and out of space. click on it
• and you can read the line, hover over it and lines connect all

• the balls from the same text

  */

  //color sceme: //tan int alpha = 100; color c1 = color(255,241,225); //cool-red color c2 = color(242,0,88); //pink color c3 = color(255,174,172); //black color c4 = color(0,0,5); //blue-gray color c5 = color(174,169,209); //create a textParticles object to keep track of the particles for that text file TextParticles quranParts;

void setup(){ //constructing the object for testing quranParts = new TextParticles(loadStrings("quran_love.txt")); background(c4); //testing color pallet size(400,400); rectMode(CORNER); float m = width / 5; noStroke(); fill(c1); rect(0,0,m,height); fill(c2); rect(m,0,m * 2, height); fill(c3); rect(m 2, 0, m3, height); fill(c4); rect(m3, 0, m4, height); fill(c5); rect(m*4, 0, m * 5, height);

}

void draw(){ quranParts.display(); }

class TextParticles { String[] txtFile; ArrayList particles; Boolean hoverOn = false; String displayText = ""; float xoff = 0; float yoff = 0.0;

TextParticles(String[] file){ txtFile = file; for(int lineNum = 0; lineNum < txtFile.length; lineNum++){ String line = txtFile[lineNum]; particles.add(new DustParticle(line, lineNum)); } }

void display(){ float offsetSizeX = map(noise(xoff),0,1,0,.3); float offsetSizeY = map(noise(yoff),0,1,0,.3);

for (int i = 0; i < particles.size(); i++){ float x = map(noise(xoff, yoff), 0, 1, width, height); float y = map(noise(xoff, yoff), 0, 1, width, height); DustParticle currPart = particles.get(i); currPart.xpos = x; currPart.ypos = y; //fill of the particles is the second color in the scheme fill(c2); if (currPart.stopMoving == true){ if ((mouseX == pmouseX) && (mouseY == pmouseY)){ ellipse(pmouseX,pmouseY,2+offsetSizeX,2+offsetSizeY);
ellipse(pmouseX,pmouseY,1+offsetSizeX,1+offsetSizeY); } else { currPart.stopMoving = false; } } if(hoverOn = false){ /* * if hover on is true: * all the dust particles from the same book light up */ // if mouse is close to or hovering over a dot hoveron is set to true if ((mouseX > x - 2) && (mouseX < x + 2) && (mouseY > y - 2) && (mouseY < y + 2)){ hoverOn = true; currPart.stopMoving = true; if(mousePressed){ //if the mouse is pressed while hovering over a particle the text of //that ball will be displayed displayText = currPart.loveLine; }
} else{ hoverOn = false; } ellipse(x,y,1+offsetSizeX,1+offsetSizeY); } else{ //if hoverOn is true (if the mouse is hovering over a particle) give each particle a glow and draw a line between them if(i > 0){ DustParticle pastPart = particles.get(i - 1); //draws a line from the last particle to the current particle //line color is fifth color in color pallet stroke(c5); line(pastPart.xpos, pastPart.ypos, currPart.xpos, currPart.ypos); }

ellipse(x,y,1+offsetSizeX,1+offsetSizeY);
} xoff += .01; yoff += .01; } } }

class DustParticle { String loveLine; int lineNumber; float xpos; float ypos; boolean stopMoving = false; DustParticle(String lovLin, int linNum){ loveLine = lovLin; lineNumber = linNum; xpos = random(width); ypos = random(height); } /* void generateLoc(){ xpos = random(width); ypos = random(height); */
}

bilmor

You'll get a better response if you format your code. Here's how:

http://forum.processing.org/two/discussion/8045/how-to-format-code-and-text

Chrisir

//color sceme: //tan 
int alpha = 100; 
color c1 = color(255, 241, 225);
//cool-red 
color c2 = color(242, 0, 88); 
//pink 
color c3 = color(255, 174, 172); 
//black 
color c4 = color(0, 0, 5);
//blue-gray 
color c5 = color(174, 169, 209); 

//create a textParticles object to keep track of the particles for that text file
TextParticles quranParts;

String[] testtext = {
  "love is king", "God is love", "love all", "love reigns", "love your neighbour", "love your enemy"
};

void setup() {
  size(400, 400);

  //constructing the object for testing
  // quranParts = new TextParticles(loadStrings("quran_love.txt"));
  quranParts = new TextParticles(testtext); 

  background(c4); 

  if (false) {

    //testing color pallet
    rectMode(CORNER); 
    float m = width / 5;
    noStroke(); 
    fill(c1); 
    rect(0, 0, m, height); 
    fill(c2); 
    rect(m, 0, m * 2, height); 
    fill(c3); 
    rect(m * 2, 0, m*3, height); 
    fill(c4); 
    rect(m * 3, 0, m*4, height); 
    fill(c5); 
    rect(m * 4, 0, m * 5, height);
  }
  //
}

void draw() { 
  quranParts.display();
}

class TextParticles { 
  //  String[] txtFile; 
  ArrayList<DustParticle> particles = new ArrayList(); // tells the ArrayList its type 
  Boolean hoverOn = false; 
  String displayText = ""; 
  float xoff = 0; 
  float yoff = 0.0;

  TextParticles(String[] file) { 
    //txtFile = file; 
    for (int lineNum = 0; lineNum < file.length; lineNum++) { 
      String line1 = file[lineNum]; 
      particles.add(new DustParticle(line1, lineNum));
    }
  }

  void display() { 
    float offsetSizeX = map(noise(xoff), 0, 1, 0, .3); 
    float offsetSizeY = map(noise(yoff), 0, 1, 0, .3);

    for (int i = 0; i < particles.size (); i++) { 
      float x = map(noise(xoff, yoff), 0, 1, 0, width); 
      float y = map(noise(xoff, yoff), 0, 1, 0, height); 
      DustParticle currPart = particles.get(i); 
      currPart.xpos = x; 
      currPart.ypos = y; 
      //fill of the particles is the second color in the scheme 
      fill(c2); 
      if (currPart.stopMoving) { 
        if ((mouseX == pmouseX) && (mouseY == pmouseY)) { 
          fill(255); 
          ellipse(pmouseX, pmouseY, 2+offsetSizeX, 2+offsetSizeY);
          ellipse(pmouseX, pmouseY, 1+offsetSizeX, 1+offsetSizeY);
        } else { 
          currPart.stopMoving = false;
        }
      } 
      if (hoverOn = false) { 
        /* 
         * if hover on is FALSE: 
         * all the dust particles from the same book light up 
         */
        // if mouse is close to or hovering over a dot hoveron is set to true
        if ((mouseX > x - 2) && (mouseX < x + 2) && (mouseY > y - 2) && (mouseY < y + 2)) { 
          hoverOn = true; 
          currPart.stopMoving = true; 
          if (mousePressed) { 
            //if the mouse is pressed while hovering over a particle the text of 
            //that ball will be displayed 
            displayText = currPart.loveLine;
            fill(255); 
            text(displayText, currPart.xpos, currPart.ypos );
          }
        } else { 
          hoverOn = false;
        } 
        fill(255); 
        ellipse(x, y, 1+offsetSizeX, 1+offsetSizeY);
      } else { 
        //if hoverOn is true (if the mouse is hovering over a particle) give each particle a glow and draw a line between them
        if (i > 0) { 
          DustParticle pastPart = particles.get(i - 1);
          //draws a line from the last particle to the current particle
          //line color is fifth color in color pallet 
          stroke(c5); 
          line(pastPart.xpos, pastPart.ypos, 
          currPart.xpos, currPart.ypos);
        }

        ellipse(x, y, 1+offsetSizeX, 1+offsetSizeY);
      } 
      xoff += .01; 
      yoff += .01;
    }
  }
}

class DustParticle { 
  String loveLine; 
  int lineNumber; 
  float xpos; 
  float ypos; 
  boolean stopMoving = false;

  DustParticle(String lovLin, int linNum) { 
    loveLine = lovLin; 
    lineNumber = linNum; 
    xpos = random(width); 
    ypos = random(height);
  }

  /* void generateLoc(){ 
   xpos = random(width); 
   ypos = random(height); 
   */
}
//

Chrisir

not finished yet....................

Chrisir

do not accept an answer too soon...

or is it solved?