Скачать или смотреть Creating a Counter from a Boolean Array: The Rotary Encoder Approach

Discover how to effectively convert a Boolean array into a counter that behaves like a rotary encoder, with a straightforward implementation in C# .
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Converting a Boolean Array into a Counter: The Rotary Encoder Approach

When working with a Boolean array, particularly in applications involving knobs or dials, it can be challenging to understand how to effectively manage the state of such an array. This guide will address a common problem: how to transform a Boolean array into a counter that accurately reflects the position of a rotary encoder.

The Problem Explained

Imagine you have a Boolean array of size 12. Each index in this array represents a position on a knob that rotates around a circle, denoted by values ranging from 0 to 11. At any given time, only one index in this Boolean array can be true, while all others are false.

Behavior of the Knob

Here's how the knob operates:

When you turn the knob clockwise from position 5 to 6, the state changes as follows:

Index 5 becomes false

Index 6 becomes true

The knob’s rotation also wraps around:

Moving clockwise from position 11 brings the knob back to position 0.

Conversely, moving from position 0 counterclockwise goes to position 11.

What you want is a counter that increments or decrements based on the direction in which the knob is turned, similar to the behavior observed in a rotary encoder.

The Solution

To implement this behavior, it’s suggested to create a dedicated class in C# , rather than using a Boolean array directly. Let's break down how to achieve this functionality.

1. Define the RotaryEncoder Class

The foundation of our solution is this custom class, which encapsulates the functionality of the rotary encoder.

[[See Video to Reveal this Text or Code Snippet]]

2. Key Components of the Class

Properties:

totalPositions: This property defines the number of states available in the rotary encoder.

ActiveIndex: This is the current position of the active knob, which is read-only outside the class.

Methods:

IncreasePosition(): This method handles moving the knob clockwise and wraps back to 0 after reaching the last position.

DecreasePosition(): This method decrements the position, allowing the knob to move counterclockwise, wrapping around from 0 back to 11.

3. Why Not Use a Boolean Array?

While it might be tempting to represent the state using a Boolean array, there are limitations:

A Boolean array doesn’t inherently support tracking the active index.

As the implementation grows, managing an array may become cumbersome and less efficient.

Creating a class provides a clear structure, encapsulation, and easier maintainability. Additionally, it allows for adding additional functionality in the future without altering the existing data structure.

Conclusion

In summary, turning a Boolean array into a counter that functions like a rotary encoder requires a dedicated class structure. By defining the RotaryEncoder, you centralize the logic of the knob's behavior and provide a simple interface for modifying the current position. This approach not only simplifies potential future modifications but also enhances readability and maintainability.

Take advantage of this structured approach to better manage your knob-like components in applications that require such functionality!