hi there,

some days ago i found an amazing script called "typestar" ( http://scott.j38.net/work/interactive/typestar/)
it's like a karaoke machine that renders lyrics in realtime.

when a song has a lot of lyrics the animation gets quite slow and shaky. i want to cut the text off so that only the last ~100 syllables are shown. i've been searching the plugintowers.java for a while but couldnt find a line to add a cut-off.

someone has a clue?

plugintower.java:
import java.util.TreeMap;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Arrays;

import processing.core.*;

class pluginTower {
  PApplet myPApplet;
  Song mySong;
  PFont myFont, myFontEm;
  int targetWidth;

  public PVector eye, target, nextEye, nextTarget;
  public float aimFrame, nextAimFrame, aimRotation, nextAimRotation;

  pluginTower (PApplet newPApplet, Song newSong, PFont newFont, PFont newFontEm, int newTargetWidth) {
    try {
      mySong = (Song)ObjectCloner.deepCopy(newSong);
    }
    catch(Exception e)
    {
      System.out.println("Exception in main = " +  e);
    }
    myPApplet = newPApplet;
    myFont = newFont;
    myFontEm = newFontEm;

    eye = new PVector();
    target = new PVector();
    aimFrame = 0;
    aimRotation = 0;
    nextEye = new PVector();
    nextTarget = new PVector();
    nextAimFrame = 0;
    nextAimRotation = 0;

    myPApplet.resetMatrix();

    TreeMap songLines = mySong.getLines(); 
    Iterator<Integer> lineItr = songLines.keySet().iterator();
    myPApplet.textFont(myFont);

    int lastRotationFactor = 0;
    int rotationFactorCount = 0;
    targetWidth = newTargetWidth;
    int lineCounter = 1;
    float lastLineHeight = 0;
    float lastLineCount = 1;
    while (lineItr.hasNext()) {
      int curLineKey = lineItr.next();
      Line curLine = (Line)songLines.get(curLineKey);

      int lineRotate = 0;
      //    if (lineCounter % 3 == 1)
      //      lineRotate = 0;
      //    else if (lineCounter %3 == 2)
      //      lineRotate = 90;
      //    else if (lineCounter %3 == 0)
      //      lineRotate = -180;      

      lineCounter++;   

      // ------------------------------
      // Set Line Transformation Matrix
      // ------------------------------

      PMatrix3D lineMatrix = new PMatrix3D();
      lastLineHeight = 0;
      float[] lineMatrixRaw  = new float[16];
      lineMatrix.get(lineMatrixRaw);
      curLine.setMatrix(lineMatrixRaw);

      int letterCount = curLine.getLetters().length();
      int wordCount = myPApplet.splitTokens(curLine.getLetters()).length;



      float lineCount;
      if (wordCount <= 3)
        lineCount = 1;
      else if (wordCount > 3 && wordCount <= 7)
        lineCount = 2;
      else if (wordCount > 7 && wordCount <= 13)
        lineCount = 3;
      else
        lineCount = 4;

      int lineStep = myPApplet.ceil(wordCount / lineCount);
      lastLineCount = lineCount;

      //
      // Determine Segment sizes
      //

      ArrayList segmentScales = new ArrayList();
      for (int curSegment = 0; curSegment < lineCount; curSegment++) {
        int fromIndex = curSegment * lineStep;
        int toIndex = (curSegment * lineStep) + lineStep;
        if (toIndex > myPApplet.splitTokens(curLine.getLetters()).length)
          toIndex = myPApplet.splitTokens(curLine.getLetters()).length;

        ArrayList segmentWords = new ArrayList(Arrays.asList(myPApplet.splitTokens(curLine.getLetters())).subList(fromIndex, toIndex ));

        String segmentString = "";
        Iterator<String> itr = segmentWords.iterator();
        while (itr.hasNext()) {
          segmentString = segmentString + " " +itr.next();
        }
        float segmentScale = targetWidth/myPApplet.textWidth(segmentString.trim());
        //println(textWidth(segmentString.trim()) + " " + segmentScale + " " + segmentString);
        segmentScales.add(segmentScale);
      }



      //println(wordCount + " " + lineCount + " " + lineStep + " " + curLine.getLetters());     

      TreeMap songWords = curLine.getWords();
      Iterator<Integer> wordItr = songWords.keySet().iterator();

      int wordCounter = 0;
      int segmentCounter = 0;
      float wordOffsetX = 0;
      float wordOffsetY = 0;
      float wordScale = 1;
      float wordTotalX = 0;
      float wordTotalY = 0;
      boolean newSegment = true;
      while (wordItr.hasNext()) {
        int curWordKey = wordItr.next();
        Word curWord = (Word)songWords.get(curWordKey);

        //println(curWord.getLetters());
        if (wordCounter % lineStep == 0) {
          newSegment = true;
        }

        if (newSegment) {
          if (segmentCounter < segmentScales.size()) {
            float lastScale = 1;
            float curScale = 1;

            for (int curSegment = 0; curSegment <= segmentCounter; curSegment++) {
              //println(lastScale + " " + 1/lastScale);
              curScale = Float.valueOf(segmentScales.get(curSegment).toString()).floatValue() * (1/lastScale);
              lastScale = Float.valueOf(segmentScales.get(curSegment).toString()).floatValue();
            }
            wordScale = curScale;
            lastLineHeight += ((myPApplet.textAscent() * .95) * lastScale) + (targetWidth/100);
            segmentCounter++;       
          }
        }
        else {
          wordScale = 1;
        }

        if (wordCounter % lineStep == 0) {
          wordOffsetX = wordOffsetX - wordTotalX;
          wordTotalX = 0;       
          wordOffsetY = (float)((myPApplet.textAscent() * .95)  * wordScale) + (targetWidth/50);
        }
        else {
          wordOffsetY = 0;
        }     


        //
        // Set Word Transformation Matrix
        //

        PMatrix3D wordMatrix = new PMatrix3D();
        wordMatrix.translate(wordOffsetX, wordOffsetY);
        wordMatrix.scale(wordScale);
        float[] wordMatrixRaw  = new float[16];
        wordMatrix.get(wordMatrixRaw);
        curWord.setMatrix(wordMatrixRaw);

        if (curWord.getLetters().charAt(0) == ' ' && newSegment)
          curWord.setLetters(curWord.getLetters().substring(1));       

        wordOffsetX = myPApplet.textWidth(curWord.getLetters());

        TreeMap songSyllables = curWord.getSyllables();
        Iterator<Integer> syllableItr = songSyllables.keySet().iterator();

        float syllableOffset = 0;
        while (syllableItr.hasNext()) {
          int curSyllableKey = syllableItr.next();
          Syllable curSyllable = (Syllable)songSyllables.get(curSyllableKey);   

          //
          // Set Word Transformation Matrix
          //

          PMatrix3D syllableMatrix = new PMatrix3D();
          syllableMatrix.translate(syllableOffset, 0);
          float[] syllableMatrixRaw  = new float[16];
          syllableMatrix.get(syllableMatrixRaw);
          curSyllable.setMatrix(syllableMatrixRaw);

          if (curSyllable.getLetters().charAt(0) == ' ' && newSegment)
            curSyllable.setLetters(curSyllable.getLetters().substring(1));         

          syllableOffset = myPApplet.textWidth(curSyllable.getLetters());
          wordTotalX += syllableOffset;
          //curSyllable.setEndFrame(curSyllable.getStartFrame() + 600);
          curWord.addSyllable(curSyllable);
        }

        //curWord.setEndFrame(curWord.getStartFrame() + 600);
        curLine.addWord(curWord);

        wordCounter++;
        newSegment = false;
      }

      //curLine.setEndFrame(curLine.getStartFrame() + 600);

      // Pick left or right rotation
      int newRotationFactor;
      if(myPApplet.round(myPApplet.random(2)) == 1) {
        newRotationFactor = 1;
      } else {
        newRotationFactor = -1;
      }

      if (lastRotationFactor == newRotationFactor)
        rotationFactorCount++;

      if (rotationFactorCount > 1) {
        newRotationFactor *= -1;
        rotationFactorCount = 0;
      }

      curLine.setRotationFactor(newRotationFactor);
      lastRotationFactor = newRotationFactor;

      curLine.setHeight(lastLineHeight);
      mySong.addLine(curLine);

    }

  }



  void draw(int currentFrame, int textColor, PMatrix3D songMatrix, PMatrix3D lineMatrix, boolean stepWidth, boolean stepHeight, boolean dropShadow, int[] autoRotate, int[] syllableAnimation) {
    float lastLineHeight = 0;
    myPApplet.pushMatrix();
    myPApplet.applyMatrix(songMatrix);

    //myPApplet.translate(0,(float)(0 - currentFrame * 2));   
    TreeMap songLines = mySong.getLines(); 
    Iterator<Integer> lineItr = songLines.keySet().iterator();

    aimRotation = nextAimRotation = 0;
    myPApplet.pushMatrix();
    int lineCounter = 0;
    while (lineItr.hasNext()) {
      lineCounter++;
      int curLineKey = lineItr.next();
      Line curLine = (Line)songLines.get(curLineKey);

      if (stepWidth) myPApplet.translate(targetWidth,0);     
      if (stepHeight) myPApplet.translate(0,lastLineHeight);

      lastLineHeight = curLine.getHeight();

      myPApplet.applyMatrix(lineMatrix);
      PMatrix3D curLineMatrix = new PMatrix3D();
      curLineMatrix.set(curLine.getMatrix());
      //curLineMatrix.print();
      myPApplet.applyMatrix(curLineMatrix);

      int modFactor = ((lineCounter%2) == 0) ? -1 : 1;
      if (autoRotate[0] == 1) myPApplet.rotateX(myPApplet.radians(90 * modFactor));
      if (autoRotate[1] == 1) myPApplet.rotateY(myPApplet.radians(90 * curLine.getRotationFactor()));
      if (autoRotate[2] == 1) myPApplet.rotateZ(myPApplet.radians(90 * curLine.getRotationFactor()));  
      
      if ((currentFrame < curLine.getStartFrame()) && lineCounter==1){
      myPApplet.textFont(myFont,30);
       myPApplet.text(mySong.artist + " - " + mySong.title,1,1);         
      } 

      if (curLine.getStartFrame() > currentFrame){
        myPApplet.pushMatrix();
        nextTarget.set(myPApplet.modelX(0,0,0),myPApplet.modelY(0,0,0),myPApplet.modelZ(0,0,0));
        nextEye.set(myPApplet.modelX(0,0,500),myPApplet.modelY(0,0,500),myPApplet.modelZ(0,0,500));
        nextAimFrame = curLine.getStartFrame();  
        myPApplet.popMatrix();       
        break;               
      }

      myPApplet.pushMatrix();
      target.set(myPApplet.modelX(0,0,0),myPApplet.modelY(0,0,0),myPApplet.modelZ(0,0,0));
      eye.set(myPApplet.modelX(0,0,500),myPApplet.modelY(0,0,500),myPApplet.modelZ(0,0,500));
      aimFrame = curLine.getStartFrame();     
      myPApplet.popMatrix();     

      TreeMap songWords = curLine.getWords();
      Iterator<Integer> wordItr = songWords.keySet().iterator();

      myPApplet.pushMatrix();
      while (wordItr.hasNext()) {
        int curWordKey = wordItr.next();
        Word curWord = (Word)songWords.get(curWordKey);
        if (curWord.getStartFrame() > currentFrame)
          continue; 

        PMatrix3D curWordMatrix = new PMatrix3D();
        curWordMatrix.set(curWord.getMatrix());
        myPApplet.applyMatrix(curWordMatrix);

        TreeMap songSyllables = curWord.getSyllables();
        Iterator<Integer> syllableItr = songSyllables.keySet().iterator();

        myPApplet.pushMatrix();

        while (syllableItr.hasNext()) {
          int curSyllableKey = syllableItr.next();
          Syllable curSyllable = (Syllable)songSyllables.get(curSyllableKey);      
          if (curSyllable.getStartFrame() > currentFrame)
            continue;

          PMatrix3D curSyllableMatrix = new PMatrix3D();
          curSyllableMatrix.set(curSyllable.getMatrix());
          myPApplet.applyMatrix(curSyllableMatrix);

          if (currentFrame - curSyllable.getStartFrame() < 8 ) {
            float aniFactor = (currentFrame - curSyllable.getStartFrame()) / 8f;
            if (syllableAnimation[0] == 1)
              myPApplet.translate(0,0,myPApplet.round(256 - ( aniFactor* 256)));
            if (syllableAnimation[1] == 1)
              myPApplet.rotateX(myPApplet.radians(myPApplet.round(85 - ( aniFactor* 85))));
            if (syllableAnimation[2] == 1)
              myPApplet.scale(aniFactor);
          }    

          //myPApplet.println( curSyllable.getLetters() + " " + currentFrame + " "  + (curSyllable.getStartFrame()));

          if (curSyllable.getEndFrame() - curSyllable.getStartFrame() < 5)
            myPApplet.textFont(myFont);
          else
            myPApplet.textFont(myFontEm);

          if (dropShadow){
            myPApplet.shininess(0); 
            myPApplet.fill(0,0,0,(float)(curLine.getStartFrame() * 1.0 / currentFrame) * 128) ;
            myPApplet.pushMatrix();
            myPApplet.translate(targetWidth/80,targetWidth/80,-targetWidth/80);
            myPApplet.text(curSyllable.getLetters(), 0, 0); 
            myPApplet.popMatrix();
          }

          myPApplet.shininess(100); 
          myPApplet.fill(textColor , (float)(curLine.getStartFrame() * 1.0 / currentFrame) * 255) ;
          myPApplet.text(curSyllable.getLetters(), 0, 0);    
        }
        myPApplet.popMatrix();
      }
      if (!lineItr.hasNext()) {
        myPApplet.pushMatrix();
        if (stepWidth) myPApplet.translate(targetWidth,0);     
        if (stepHeight) myPApplet.translate(0,curLine.getHeight());       
        nextTarget.set(myPApplet.modelX(0,0,0),myPApplet.modelY(0,0,0),myPApplet.modelZ(0,0,0));
        nextEye.set(myPApplet.modelX(0,0,500),myPApplet.modelY(0,0,500),myPApplet.modelZ(0,0,500));
        nextAimFrame = curLine.getEndFrame();
        myPApplet.popMatrix();           
      }
      myPApplet.popMatrix();
    }  

    myPApplet.popMatrix();
    myPApplet.popMatrix();
  }


  PVector getAim(int currentFrame) {
    int curAimX, curAimY, curAimZ;
    if(nextAimFrame - aimFrame > 300) {
      if (currentFrame < ((nextAimFrame - aimFrame)/2) + aimFrame) {
        nextTarget.set(0,0,0);
      }
      else {
        target.set(0,0,0);
      }
    }
   
  
    if (currentFrame > nextAimFrame) {
      curAimX = myPApplet.floor(nextTarget.x);
      curAimY = myPApplet.floor(nextTarget.y);
      curAimZ = myPApplet.floor(nextTarget.z);
    }
    else {
      curAimX = myPApplet.floor(target.x + (nextTarget.x - target.x) * ((currentFrame - aimFrame) / (nextAimFrame - aimFrame)));         
      curAimY = myPApplet.floor(target.y + (nextTarget.y - target.y) * ((currentFrame - aimFrame) / (nextAimFrame - aimFrame)));
      curAimZ = myPApplet.floor(target.z + (nextTarget.z - target.z) * ((currentFrame - aimFrame) / (nextAimFrame - aimFrame)));       
    }     
    return(new PVector(curAimX, curAimY, curAimZ));
  }

  PVector getEye(int currentFrame) {
    int curEyeX, curEyeY, curEyeZ;
    if(nextAimFrame - aimFrame > 300) {
      if (currentFrame < ((nextAimFrame - aimFrame)/2) + aimFrame) {
        nextEye.set(0,0,0);
      }
      else {
        eye.set(0,0,0);
      }
    }
  
    if (currentFrame > nextAimFrame) {
      curEyeX = myPApplet.floor(nextEye.x);
      curEyeY = myPApplet.floor(nextEye.y);
      curEyeZ = myPApplet.floor(nextEye.z);
    }
    else {
      curEyeX = myPApplet.floor(eye.x + (nextEye.x - eye.x) * ((currentFrame - aimFrame) / (nextAimFrame - aimFrame)));         
      curEyeY = myPApplet.floor(eye.y + (nextEye.y - eye.y) * ((currentFrame - aimFrame) / (nextAimFrame - aimFrame)));
      curEyeZ = myPApplet.floor(eye.z + (nextEye.z - eye.z) * ((currentFrame - aimFrame) / (nextAimFrame - aimFrame)));       
    }
   
   
    return(new PVector(curEyeX, curEyeY, curEyeZ));
  }

}