स्क्रिप्टिंग उदाहरण

import { Behaviour, serializable } from "@needle-tools/engine"
import { Object3D } from "three"

export class MyComponent extends Behaviour {

    @serializable(Object3D)
    myObjectReference?: Object3D;

    start() {
        console.log("Hello world", this);
    }

    update() {
        this.gameObject.rotateY(this.context.time.deltaTime);
    }
}

import { Behaviour, serializable, Camera } from "@needle-tools/engine";
import { Object3D } from "three"

export class MyClass extends Behaviour {
    // this will be a "Transform" field in Unity
    @serializable(Object3D) 
    myObjectReference: Object3D | null = null;
    
    // this will be a "Transform" array field in Unity
    // Note that the @serializable decorator contains the array content type! (Object3D and not Object3D[])
    @serializable(Object3D) 
    myObjectReferenceList: Object3D[] | null = null;

    // for component or other objects use the object's type
    @serializable(Camera)
    myCameraComponent: Camera | null = null;
}

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

export class MyClass extends Behaviour {

    // if you export a prefab or scene as a reference from Unity you'll get a path to that asset
    // which you can de-serialize to AssetReference for convenient loading
    @serializable(AssetReference)
    myPrefab?: AssetReference;
    
    async start() {
      // directly instantiate
      const myInstance = await this.myPrefab?.instantiate();

      // you can also just load and instantiate later
      // const myInstance = await this.myPrefab.loadAssetAsync();
      // this.gameObject.add(myInstance)
      // this is useful if you know that you want to load this asset only once because it will not create a copy
      // since ``instantiate()`` does create a copy of the asset after loading it
    }  
}

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

export class LoadingScenes extends Behaviour {
    // tell the component compiler that we want to reference an array of SceneAssets
    // @type UnityEditor.SceneAsset[]
    @serializable(AssetReference)
    myScenes?: AssetReference[];

    async awake() {
        if (!this.myScenes) {
            return;
        }
        for (const scene of this.myScenes) {
            // check if it is assigned in unity
            if(!scene) continue;
            // load the scene once
            const myScene = await scene.loadAssetAsync();
            // add it to the threejs scene
            this.gameObject.add(myScene);
            
            // of course you can always just load one at a time
            // and remove it from the scene when you want
            // myScene.removeFromParent();
            // this is the same as scene.asset.removeFromParent()
        }
    }

    onDestroy(): void {
        if (!this.myScenes) return;
        for (const scene of this.myScenes) {
            scene?.unload();
        }
    }
}

import { Behaviour, IPointerClickHandler, PointerEventData, showBalloonMessage } from "@needle-tools/engine";

export class ClickExample extends Behaviour implements IPointerClickHandler {

    // Make sure to have an ObjectRaycaster component in the parent hierarchy
    onPointerClick(_args: PointerEventData) {
        showBalloonMessage("Clicked " + this.name);
    }
}

import { Behaviour, EventList, IPointerClickHandler, PointerEventData, serializable } from "@needle-tools/engine";

export class SyncedClick extends Behaviour implements IPointerClickHandler {

    @serializable(EventList)
    onClick!: EventList;

    onPointerClick(_args: PointerEventData) {
        console.log("SEND CLICK");
        this.context.connection.send("clicked/" + this.guid);
        this.onClick?.invoke();
    }

    onEnable(): void {
        this.context.connection.beginListen("clicked/" + this.guid, this.onRemoteClick);
    }
    onDisable(): void {
        this.context.connection.stopListen("clicked/" + this.guid, this.onRemoteClick);
    }


    onRemoteClick = () => {
        console.log("RECEIVED CLICK");
        this.onClick?.invoke();
    }
    
}

import { Behaviour, serializable, Animation, IPointerClickHandler, PointerEventData } from "@needle-tools/engine";

export class PlayAnimationOnClick extends Behaviour implements IPointerClickHandler {

    @serializable(Animation)
    animation?: Animation;

    awake() {
        if (this.animation) {
            this.animation.playAutomatically = false;
            this.animation.loop = false;
        }
    }

    onPointerClick(_args: PointerEventData) {
        if (this.animation) {
            this.animation.play();
        }
    }
}

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

export class ExportAnimationClip extends Behaviour {

    @serializable(AnimationClip)
    animation?: AnimationClip;

    awake() {
        console.log("My referenced animation clip", this.animation);
    }
}

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

export class MyComponent extends Behaviour {

    @serializable(EventList)
    myEvent? : EventList;

    start() {
        this.myEvent?.invoke();
    }
}

import { Behaviour, serializable, EventList } from "@needle-tools/engine";
import { Object3D } from "three";

/*
Make sure to have a c# file in your project with the following content:

using UnityEngine;
using UnityEngine.Events;

[System.Serializable]
public class MyCustomUnityEvent : UnityEvent<string>
{
}

Unity documentation about custom events: 
https://docs.unity3d.com/ScriptReference/Events.UnityEvent_2.html

*/

// Documentation → https://docs.needle.tools/scripting

export class CustomEventCaller extends Behaviour {

    // The next line is not just a comment, it defines 
    // a specific type for the component generator to use.

    //@type MyCustomUnityEvent
    @serializable(EventList)
    myEvent!: EventList;

    // just for testing - could be when a button is clicked, etc.
    start() {
        this.myEvent.invoke("Hello");
    }
}

export class CustomEventReceiver extends Behaviour {

    logStringAndObject(str: string) {
        console.log("From Event: ", str);
    }
}

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

// Documentation → https://docs.needle.tools/scripting

class CustomSubData {
    @serializable()
    subString: string = "";
    
    @serializable()
    subNumber: number = 0;
}

class CustomData {
    @serializable()
    myStringField: string = "";
    
    @serializable()
    myNumberField: number = 0;
    
    @serializable()
    myBooleanField: boolean = false;
    
    @serializable(CustomSubData)
    subData: CustomSubData | undefined = undefined;

    someMethod() {
        console.log("My string is " + this.myStringField, "my sub data", this.subData)
    }
}

export class SerializedDataSample extends Behaviour {

    @serializable(CustomData)  
    myData: CustomData | undefined;
    
    onEnable() {
        console.log(this.myData);
        this.myData?.someMethod();
    }
}

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

export class WhereAmI extends Behaviour {
    start() {
        navigator.geolocation.getCurrentPosition((position) => {
            console.log("Navigator response:", position);
            const latlong = position.coords.latitude + ", " + position.coords.longitude;
            showBalloonMessage("You are at\nLatLong " + latlong);
        });
    }
}

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

export class DisplayTime extends Behaviour {

    @serializable(Text)
    text?: Text;

    onEnable(): void {
        this.startCoroutine(this.updateTime())
    }

    private *updateTime() {
        while (true) {
            if (this.text) {
                this.text.text = new Date().toLocaleTimeString();
                console.log(this.text.text)
            }
            yield WaitForSeconds(1)
        }
    };
}

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

declare type MyCustomShaderMaterial = {
   _Speed: number;
};

export class IncreaseShaderSpeedOverTime extends Behaviour {

   @serializable(Material)
   myMaterial?: Material & MyCustomShaderMaterial;

   update() {
       if (this.myMaterial) {
           this.myMaterial._Speed *= 1 + this.context.time.deltaTime;
           if(this.myMaterial._Speed > 1) this.myMaterial._Speed = .0005;
           if(this.context.time.frame % 30 === 0) console.log(this.myMaterial._Speed)
       }
   }
}

import { EffectProviderResult, PostProcessingEffect, registerCustomEffectType, serializable } from "@needle-tools/engine";
import { OutlineEffect } from "postprocessing";
import { Object3D } from "three";

export class OutlinePostEffect extends PostProcessingEffect {

    // the outline effect takes a list of objects to outline
    @serializable(Object3D)
    selection!: Object3D[];

    // this is just an example method that you could call to update the outline effect selection
    updateSelection() {
        if (this._outlineEffect) {
            this._outlineEffect.selection.clear();
            for (const obj of this.selection) {
                this._outlineEffect.selection.add(obj);
            }
        }
    }


    // a unique name is required for custom effects
    get typeName(): string {
        return "Outline";
    }

    private _outlineEffect: void | undefined | OutlineEffect;

    // method that creates the effect once
    onCreateEffect(): EffectProviderResult | undefined {

        const outlineEffect = new OutlineEffect(this.context.scene, this.context.mainCamera!);
        this._outlineEffect = outlineEffect;
        outlineEffect.edgeStrength = 10;
        outlineEffect.visibleEdgeColor.set(0xff0000);
        for (const obj of this.selection) {
            outlineEffect.selection.add(obj);
        }

        return outlineEffect;
    }
}
// You need to register your effect type with the engine
registerCustomEffectType("Outline", OutlinePostEffect);

import { Behaviour, ParticleSystem } from "@needle-tools/engine";
import { ParticleSystemBaseBehaviour, QParticle } from "@needle-tools/engine";

// Derive your custom behaviour from the ParticleSystemBaseBehaviour class (or use QParticleBehaviour)
class MyParticlesBehaviour extends ParticleSystemBaseBehaviour {

    // callback invoked per particle
    update(particle: QParticle): void {
        particle.position.y += 5 * this.context.time.deltaTime;
    }
}
export class TestCustomParticleSystemBehaviour extends Behaviour {
    start() {
        // add your custom behaviour to the particle system
        this.gameObject.getComponent(ParticleSystem)!.addBehaviour(new MyParticlesBehaviour())
    }
}

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

// declaring AudioClip type is for codegen to produce the correct input field (for e.g. Unity or Blender)
declare type AudioClip = string;

export class My2DAudio extends Behaviour {

    // The clip contains a string pointing to the audio file - by default it's relative to the GLB that contains the component
    // by adding the URL decorator the clip string will be resolved relative to your project root and can be loaded
    @serializable(URL)
    clip?: AudioClip;

    awake() {
        // creating a new audio element and playing it
        const audioElement = new Audio(this.clip);
        audioElement.loop = true;
        // on the web we have to wait for the user to interact with the page before we can play audio
        AudioSource.registerWaitForAllowAudio(() => {
            audioElement.play();
        })
    }
}

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

export class FileReferenceExample extends Behaviour {

    // A FileReference can be used to load and assign arbitrary data in the editor. You can use it to load images, audio, text files... FileReference types will not be saved inside as part of the GLB (the GLB will only contain a relative URL to the file)
    @serializable(FileReference)
    myFile?: FileReference;
    // Tip: if you want to export and load an image (that is not part of your GLB) if you intent to add it to your HTML content for example you can use the ImageReference type instead of FileReference. It will be loaded as an image and you can use it as a source for an <img> tag.

    async start() {
        console.log("This is my file: ", this.myFile);
        // load the file
        const data = await this.myFile?.loadRaw();
        if (!data) {
            console.error("Failed loading my file...");
            return;
        }
        console.log("Loaded my file. These are the bytes:", await data.arrayBuffer());
    }
}

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

export class HTMLButtonClick extends Behaviour {

    /** Enter a button query (e.g. button.some-button if you're interested in a button with the class 'some-button') 
     * Or you can also use an id (e.g. #some-button if you're interested in a button with the id 'some-button')
     * Or you can also use a tag (e.g. button if you're interested in any button
    */
    @serializeable()
    htmlSelector: string = "button.some-button";
    
    /** This is the event to be invoked when the html element is clicked. In Unity or Blender you can assign methods to be called in the Editor */
    @serializable(EventList)
    onClick: EventList = new EventList();

    private element? : HTMLButtonElement;

    onEnable() {
        // Get the element from the DOM
        this.element = document.querySelector(this.htmlSelector) as HTMLButtonElement;
        if (this.element) {
            this.element.addEventListener('click', this.onClicked);
        }
        else console.warn(`Could not find element with selector \"${this.htmlSelector}\"`);
    }

    onDisable() {
        if (this.element) {
            this.element.removeEventListener('click', this.onClicked);
        }
    }

    private onClicked = () => {
        this.onClick.invoke();
    }
}

import { Behaviour } from "@needle-tools/engine";
import { Texture } from "three";

export class DisableEnvironmentLight extends Behaviour {

   private _previousEnvironmentTexture: Texture | null = null;

   onEnable(): void {
       this._previousEnvironmentTexture = this.context.scene.environment;
       this.context.scene.environment = null;
   }

   onDisable(): void {
       this.context.scene.environment = this._previousEnvironmentTexture;
   }
}

import { FilesetResolver, HandLandmarker, HandLandmarkerResult, NormalizedLandmark } from "@mediapipe/tasks-vision";
import { Behaviour, Mathf, serializable, showBalloonMessage } from "@needle-tools/engine";
import { ParticleSphere } from "./ParticleSphere";

export class MediapipeHands extends Behaviour {

    @serializable(ParticleSphere)
    spheres: ParticleSphere[] = [];

    private _video!: HTMLVideoElement;
    private _handLandmarker!: HandLandmarker;

    async awake() {
        showBalloonMessage("Initializing mediapipe...")

        const vision = await FilesetResolver.forVisionTasks(
            // path/to/wasm/root
            "https://cdn.jsdelivr.net/npm/@mediapipe/tasks-vision@latest/wasm"
        );
        this._handLandmarker = await HandLandmarker.createFromOptions(
            vision,
            {
                baseOptions: {
                    modelAssetPath: "https://storage.googleapis.com/mediapipe-models/hand_landmarker/hand_landmarker/float16/latest/hand_landmarker.task",
                    delegate: "GPU"
                },
                numHands: 2
            });
        //@ts-ignore
        await this._handLandmarker.setOptions({ runningMode: "VIDEO" });

        this._video = document.createElement("video");
        this._video.setAttribute("style", "max-width: 30vw; height: auto;");
        console.log(this._video);
        this._video.autoplay = true;
        this._video.playsInline = true;
        this.context.domElement.appendChild(this._video);
        this.startWebcam(this._video);
    }

    private _lastVideoTime: number = 0;

    update(): void {
        if (!this._video || !this._handLandmarker) return;
        const video = this._video;
        if (video.currentTime !== this._lastVideoTime) {
            let startTimeMs = performance.now();
            showBalloonMessage("<strong>Control the spheres with one or two hands</strong>!<br/><br/>Sample scene by <a href='https://twitter.com/llllkatjallll/status/1659280435023605773'>Katja Rempel</a>")
            const detections = this._handLandmarker.detectForVideo(video, startTimeMs);
            this.processResults(detections);
            this._lastVideoTime = video.currentTime;
        }

    }

    private processResults(results: HandLandmarkerResult) {
        const hand1 = results.landmarks[0];
        // check if we have even one hand
        if (!hand1) return;

        if (hand1.length >= 4 && this.spheres[0]) {
            const pos = hand1[4];
            this.processLandmark(this.spheres[0], pos);
        }

        // if we have a second sphere:
        if (this.spheres.length >= 2) {
            const hand2 = results.landmarks[1];
            if (!hand2) {
                const pos = hand1[8];
                this.processLandmark(this.spheres[1], pos);
            }
            else {
                const pos = hand2[4];
                this.processLandmark(this.spheres[1], pos);
            }
        }
    }

    private processLandmark(sphere: ParticleSphere, pos: NormalizedLandmark) {
        const px = Mathf.remap(pos.x, 0, 1, -6, 6);
        const py = Mathf.remap(pos.y, 0, 1, 6, -6);
        sphere.setTarget(px, py, 0);
    }

    private async startWebcam(video: HTMLVideoElement) {
        const constraints = { video: true, audio: false };
        const stream = await navigator.mediaDevices.getUserMedia(constraints);
        video.srcObject = stream;
    }
}

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();
        }
    }

    onCollisionEnter(_col: Collision) {
        if (!this.renderer) return;
        this.collisionCount += 1;
        for (let i = 0; i < this.renderer.sharedMaterials.length; i++) {
            this.renderer.sharedMaterials[i]["color"].setRGB(Math.random(), Math.random(), Math.random());
        }
    }

    onCollisionExit(_col: Collision) {
        if (!this.renderer || !this._startColor) return;
        this.collisionCount -= 1;
        if (this.collisionCount === 0) {
            for (let i = 0; i < this.renderer.sharedMaterials.length; i++) {
                this.renderer.sharedMaterials[i]["color"].copy(this._startColor[i])
                // .setRGB(.1, .1, .1);
            }
        }
    }

    // more events:
    // onCollisionStay(_col: Collision)
    // onCollisionExit(_col: Collision)
}

export class PhysicsTrigger extends Behaviour {

    @serializeable(GameObject)
    triggerObjects?:GameObject[];

    @serializeable(EventList)
    onEnter?: EventList;

    @serializeable(EventList)
    onStay?: EventList;

    @serializeable(EventList)
    onExit?: EventList;

    onTriggerEnter(col: Collider) {
        if(this.triggerObjects && this.triggerObjects.length > 0 && !this.triggerObjects?.includes(col.gameObject)) return;
        this.onEnter?.invoke();
    }

    onTriggerStay(col: Collider) {
        if(this.triggerObjects && this.triggerObjects.length > 0 && !this.triggerObjects?.includes(col.gameObject)) return;
        this.onStay?.invoke();
    }

    onTriggerExit(col: Collider) {
        if(this.triggerObjects && this.triggerObjects.length > 0 && !this.triggerObjects?.includes(col.gameObject)) return;
        this.onExit?.invoke();
    }
}

import { Behaviour, Collider, GameObject, Rigidbody, serializeable } from "@needle-tools/engine";
import { Vector3 } from "three";

export class StartPosition extends Behaviour {

    //@nonSerialized
    startPosition?: Vector3;

    start() {
        this.updateStartPosition();
    }

    updateStartPosition(){
        this.startPosition = this.gameObject.position.clone();
    }

    resetToStart() {
        if (!this.startPosition) return;
        const rb = GameObject.getComponent(this.gameObject, Rigidbody);
        rb?.teleport(this.startPosition);
    }
}

/** Reset to start position when object is exiting the collider */
export class AutoReset extends StartPosition {

    @serializeable(Collider)
    worldCollider?: Collider;

    start(){
        super.start();
        if(!this.worldCollider) console.warn("Missing collider to reset", this);
    }
    
    onTriggerExit(col) {
        if(col === this.worldCollider){
            this.resetToStart();
        }
    }
}

import { AudioSource, Behaviour, serializeable } from "@needle-tools/engine";

export class PlayAudioOnCollision extends Behaviour {
    @serializeable(AudioSource)
    audioSource?: AudioSource;

    onCollisionEnter() {
        this.audioSource?.play();
    }
}

import { Behaviour, serializeable, Renderer } from "@needle-tools/engine";
import { Color } from "three";

export class RandomColor extends Behaviour {

    @serializeable()
    applyOnStart: boolean = true;

    start() {
        if (this.applyOnStart)
            this.applyRandomColor();

        // if materials are not cloned and we change the color they might also change on other objects
        const cloneMaterials = true;
        if (cloneMaterials) {
            const renderer = this.gameObject.getComponent(Renderer);
            if (!renderer) {
                return;
            }
            for (let i = 0; i < renderer.sharedMaterials.length; i++) {
                renderer.sharedMaterials[i] = renderer.sharedMaterials[i].clone();
            }
        }
    }

    applyRandomColor() {
        const renderer = this.gameObject.getComponent(Renderer);
        if (!renderer) {
            console.warn("Can not change color: No renderer on " + this.name);
            return;
        }
        for (let i = 0; i < renderer.sharedMaterials.length; i++) {
            renderer.sharedMaterials[i].color = new Color(Math.random(), Math.random(), Math.random());
        }
    }
}

import { Behaviour, GameObject, LogType, serializeable, showBalloonMessage, WaitForSeconds } from "@needle-tools/engine";

export class TimedSpawn extends Behaviour {
    @serializeable(GameObject)
    object?: GameObject;

    interval: number = 1000;
    max: number = 100;

    private spawned: number = 0;

    awake() {
        if (!this.object) {
            console.warn("TimedSpawn: no object to spawn");
            showBalloonMessage("TimedSpawn: no object to spawn", LogType.Warn);
            return;
        }
        GameObject.setActive(this.object, false);
        this.startCoroutine(this.spawn())
    }

    *spawn() {
        if (!this.object) return;
        while (this.spawned < this.max) {
            const instance = GameObject.instantiate(this.object);
            GameObject.setActive(instance!, true);
            this.spawned += 1;
            yield WaitForSeconds(this.interval / 1000);
        }
    }
}