Method trim

src/org/opensourcephysics/display/Stripchart.java:117–147

Trims data points whose x values are outside the xrange from the dataset.

()

   * Trims data points whose x values are outside the xrange from the dataset.
   */
  private void trim() {
    if((index>0)&&(xpoints[0]<lastx-xrange)) {
      int counter = 0;
      while((counter<index)&&(xpoints[counter]<lastx-xrange)) {
        counter++;
      }
      System.arraycopy(xpoints, counter, xpoints, 0, index-counter);
      System.arraycopy(ypoints, counter, ypoints, 0, index-counter);
      index = index-counter;
    }
    if(rightToLeft) {
      xmin = lastx-xrange;
    } else {
      xmin = lastx;
    }
    if(rightToLeft) {
      xmax = lastx;
    } else {
      xmax = lastx-xrange;
    }
    ymin = ymax = ypoints[0];
    for(int i = 1; i<index; i++) {
      ymin = Math.min(ymin, ypoints[i]);
      ymax = Math.max(ymax, ypoints[i]);
    }
    if(ymax-ymin<yrange) {
      ymin = (ymax+ymin-yrange)/2.0;
      ymax = (ymax+ymin+yrange)/2.0;
    }
    recalculatePath();
  }

  /**
   * Returns the XML.ObjectLoader for this class.