Automatically decide the appropriate hit test mode for the series.

Use a color encoded off screen buffer for hit testing. Should always be O(1) time for determining a hit series. This increases frame render time and memory usage, however. Consider using this if hit testing time is degrading performance.

Use a computational based approach to determine whether the series has been hit. This uses loose bounding boxes, in some cases, and can range in time complexity between O(1) and O(log n) to find a hit. This decreases frame render time compared to color encoded.