public class RedRibbon {
  
  float noiseScale=0.01; 
  float noiseSpeed = 0.6;
  float noiseStep = 0;
  int history = 600;
  int blobSize = 1000;
  float ribbonWidth = 2;
  int ribbonCurrentLength = 0;  
  int historyPos = 0;
  int lastHistoryPos = 0;
  int historyReadPos = 0;
  float [] posHistoryX = new float[history];
  float [] posHistoryY = new float[history];
  float [] posHistoryZ = new float[history];  
  float noiseValX, noiseValY, noiseValZ;

  void calculateRibbon() {
    // Get Next Position 
    noiseValX = noise((noiseStep)*noiseScale)-.5; 
    noiseValY = noise((noiseStep)*noiseScale,(noiseStep)*noiseScale)-.5; 
    noiseValZ = noise((noiseStep)*noiseScale,(noiseStep)*noiseScale,(noiseStep)*noiseScale)-.5; 
    noiseStep = noiseStep + noiseSpeed;
    // Poulate Position History
    posHistoryX[historyPos] = noiseValX;
    posHistoryY[historyPos] = noiseValY;
    posHistoryZ[historyPos] = noiseValZ;  
    lastHistoryPos = historyPos;
    historyPos++;
    if (historyPos>history-1) historyPos = 0;    
  }
  
  void renderRibbon() {
    // Draw Pos History
    historyReadPos = historyPos-1;
    // texture(glowLine);
    if (frameCount < history) {
      if (historyReadPos<0) historyReadPos = historyPos-1;
      ribbonCurrentLength = historyPos-1;
    } else {
      if (historyReadPos<0) historyReadPos = history-1;
      ribbonCurrentLength = history-1;
    }
    beginShape(QUAD_STRIP);
    for (int i=0; i<ribbonCurrentLength; i++) {
      vertex(posHistoryX[historyReadPos]*blobSize-ribbonWidth, posHistoryY[historyReadPos]*blobSize, posHistoryZ[historyReadPos]*blobSize);
      vertex(posHistoryX[historyReadPos]*blobSize+ribbonWidth, posHistoryY[historyReadPos]*blobSize, posHistoryZ[historyReadPos]*blobSize);
      historyReadPos--;
      if (historyReadPos<0) {
        historyReadPos = ribbonCurrentLength-1;
      }
    }
    endShape(); 
  }
}