How to Dynamically Reference Different Objects in a JavaScript Class Based on User Input

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The Problem

Here's a snippet of the function that currently only references obj1:

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

The real challenge is figuring out how to determine which object is being interacted with. Let’s dive into a more scalable solution.

The Solution

To address this issue, you will create a more dynamic system that allows for easy tracking of all circle instances interacting with mouse events.

Step 1: Create an Array of Instances

First, you need a way to track all instances of your primitive class. Update your class constructor to include a name and push each instance into an array:

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

Step 2: Implement a Method to Find Instances

Next, you will create a static method within the primitive class that can find and return the correct object based on mouse coordinates. This method will loop through the instances stored in the PRIMITIVES array and check if the mouse is within the bounds of the shape.

Here’s how to implement it:

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

Step 3: Update Your Mouse Interaction Function

Finally, modify your whilePressed function to use the new findInstance method. This change will allow your simulation to interact with the correct instance based on user input:

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

Conclusion

Remember, programming can be tricky, but understanding object-oriented principles in JavaScript will make your projects much more manageable. If you have further questions or run into issues, feel free to reach out!