How to work with collisions?

discord-import · July 5, 2023, 12:00am

how to make a collider trigger in code without raycast. For example, if an object enters some object, so that it is written in the console that this object has entered this zone.

Original Post on Discord

by user 1101049107931480066

marcel · July 5, 2023, 12:00am

Hi, you can use the component events: Needle Engine Scripting | Needle Engine Documentation

marcel · July 5, 2023, 12:00am

You can also checkout the samples for physics: Needle Engine Samples < e.g. the color changes is done via those event methods

marcel · July 5, 2023, 12:00am

github.com

needle-tools/needle-engine-samples/blob/main/package/Runtime/_Shared/SampleScripts~/ChangeColorOnCollision.ts

// START MARKER Change Color On Collision
import { Behaviour, Collision, Renderer } from "@needle-tools/engine";
import{ Color } from "three";

export class ChangeColorOnCollision extends Behaviour {

    private renderer: Renderer | null = null;
    private collisionCount: number = 0;

    private _startColor? : Color[];

    start() {
        this.renderer = this.gameObject.getComponent(Renderer);
        if (!this.renderer) return;
        if(!this._startColor) this._startColor = [];
        for (let i = 0; i < this.renderer.sharedMaterials.length; i++) {
            this.renderer.sharedMaterials[i] = this.renderer.sharedMaterials[i].clone();
            this._startColor[i] = this.renderer.sharedMaterials[i]["color"].clone();
        }
    }

This file has been truncated. show original

marcel · July 5, 2023, 12:00am

or needle-engine-samples/package/Runtime/_Shared/SampleScripts~/PlayAnimationOnTrigger.ts at main · needle-tools/needle-engine-samples · GitHub

marcel · July 5, 2023, 12:00am

Now also in the docs Script Examples | Needle Engine Documentation

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Clarification about Colliders 🌵 Needle Engine question	20	68	September 6, 2023
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How to work with collisions?

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