How to Instantiate Prefab in Scene every 5 seconds

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1

I need a script in typescript to spawn a prefab in the scene every 5 seconds, I will attach this script as a component to an empty game object. Serialize so I can drop the asset into the component.

2

Here’s a TypeScript script for your requirement to instantiate a prefab in the scene every 5 seconds. This script will be attached to an empty game object, and you can serialize the prefab reference for easy assignment in the editor:

import { Behaviour, serializable, AssetReference } from "@needle-tools/engine";

export class PrefabSpawner extends Behaviour {
    @serializable(AssetReference)
    prefab?: AssetReference; // Serialized reference to the prefab

    private spawnInterval: number = 5000; // Interval in milliseconds
    private timer: number = 0;

    async update() {
        this.timer += this.context.time.deltaTime * 1000; // Convert delta time to milliseconds

        if (this.timer >= this.spawnInterval) {
            this.timer = 0; // Reset timer
            await this.spawnPrefab(); // Spawn the prefab
        }
    }

    private async spawnPrefab() {
        if (this.prefab) {
            await this.prefab.instantiate(); // Instantiate the prefab
        }
    }
}

Explanation:

  1. @serializable(AssetReference): This allows you to assign the prefab in the Unity editor directly to this variable.
  2. update(): This function runs every frame, accumulating time until it reaches 5000 ms (5 seconds).
  3. spawnPrefab(): This method is called to instantiate the prefab using the reference provided.

Next Steps:

  • Attach this component to an empty GameObject.
  • Assign the prefab that you want to spawn to the prefab field in the inspector.

Let me know if you need any further assistance!

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1 Like
3

Amazing, thank you!

4

You’re welcome, 0nederful! If you have any more questions or need further assistance with Needle Engine, feel free to ask. Happy coding!

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