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Learn how to efficiently move objects along a LineRenderer in Unity, overcoming performance issues for smooth, high-speed movement.
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This video is based on the question https://stackoverflow.com/q/64560933/ asked by the user 'Daniel Lip' ( https://stackoverflow.com/u/847881/ ) and on the answer https://stackoverflow.com/a/64561989/ provided by the user 'Ruzihm' ( https://stackoverflow.com/u/1092820/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Move Objects Faster on a LineRenderer Path in Unity

If you've ever tried moving an object along a LineRenderer in Unity and found that it's not as fast as you'd hoped, you're not alone! Many game developers encounter this issue, especially when dealing with long curved lines that contain numerous points. Let's dive into the problem and explore an effective solution.

Understanding the Problem

When you set the speed of an object to a high value (like 1000 or even 10000), you may expect it to race across your path immediately, yet you'll notice that it doesn't always reach your desired velocity—particularly when the path includes many positions. This can be a huge hurdle if you're working with complex scenes, as objects like cars or other moving entities are expected to move smoothly and at considerable speeds.

Key Insights:

Position Count: With a high number of points (1157 or even up to 5000), calculating movement might feel cumbersome.

Speed Limitations: The inherent limitations of Vector3.MoveTowards can prevent achieving that high-speed effect.

Expectation vs. Reality: You might have seen demos where objects move effortlessly along curved paths. So, what is their secret?

The Solution

The good news is that with a slight change to your movement method, you can achieve the desired speed without sacrificing the smoothness of your animations. Instead of moving towards the target in a single step, we can move based on the calculated distance to travel for that frame, allowing us to loop through multiple points if necessary.

Proposed Code Modification

Below is an improved version of the movement script that implements this concept:

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

How It Works

Distance Calculation: Instead of moving a fixed amount towards the target point, the script calculates how far to move based on the object's speed. This allows for covering more distance in a single update frame.

Iterative Movement: The while loop checks if the object has reached the target point, and if not, it continues moving. This means that if the object is at a high speed, it will move through multiple points in a single frame until it either reaches the target or exceeds the distance it's supposed to travel.

Smooth Transition: By adjusting the position in small increments, we maintain smooth motion while effectively increasing speed.

Conclusion

Now you can allow your objects to move much faster along a LineRenderer, enhancing the dynamics of your Unity projects. By making this small change in your movement logic, you can take full advantage of your high speed settings while ensuring that your objects transition smoothly along their designated paths.

Happy coding, and may your Unity projects run faster than ever!