class Blob extends Solid{
  float noiseScale;
  //-----------
  Blob(){
    super();
    this.noiseScale = 3;
  }
  //-----------
  void parse(String[] strs, int s){
    for(  ; s<strs.length ; s++ ){
      universalPropertiesParse(strs[s]);
      String[] ex = trim(strs[s]).split(" *: *| *, *");
      if( ex[0].equals("noiseScale") )
        noiseScale = float( ex[1] );
    }
  }
  //-----------
  Vector3D getRandomPosition(){
    float x,y,z;
    while(true){
      x = random(-1,1);
      y = random(-1,1);
      z = random(-1,1);
      float val = voxel(x,y,z);
      if( val>0.4 && val<0.5) break;
    }
    
    return new Vector3D( x, y, z);
  }
  //-----------
  Vector3D getSequentialPosition(){
    return getRandomPosition();
  }
  //-----------
  float voxel(float x, float y, float z){
    float d = 1 - sq(mag(x,y,z));
    d = ( d<0 ? 0 : d );
    return d*noise(4711+noiseScale*x,17+noiseScale*y,noiseScale*z);
  }
}