using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class ChangeCubeColor : MonoBehaviour
{
// Start is called before the first frame update
public GameObject cube; // Assign your cube here in the inspector
public Button changeColorButton; // Assign your button here in the inspector
void Start()
{
// Add a listener to the button
changeColorButton.onClick.AddListener(ChangeColor);
}
public void ChangeColor()
{
if (cube != null)
{
// Change the cubeās color to a random color
cube.GetComponent().material.color = Color.blue;
}
}
}
i am using this script and it is not working
Hi Burhanuddin Limdiwala,
Letās troubleshoot your script for changing the cubeās color using the button. Hereās a step-by-step checklist to ensure everything is set up correctly:
-
Cube Assignment: Ensure that youāve assigned the cube
GameObject in the Unity inspector. If itās not assigned, cube
will be null
.
-
Button Assignment: Similarly, make sure that you have assigned the changeColorButton
to the appropriate Button component in the inspector.
-
Event System: Confirm that your scene contains an EventSystem
GameObject. Unity requires this for UI elements to function correctly.
-
Canvas Setup: Ensure that your Button is placed inside a Canvas
in your scene.
-
Renderer Component: Make sure the cube has a Renderer
component.
Here is your existing code with the random color commented out, replaced with a fixed color for easier testing:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class ChangeCubeColor : MonoBehaviour
{
// Start is called before the first frame update
public GameObject cube; // Assign your cube here in the inspector
public Button changeColorButton; // Assign your button here in the inspector
void Start()
{
// Add a listener to the button
changeColorButton.onClick.AddListener(ChangeColor);
}
public void ChangeColor()
{
if (cube != null)
{
// Change the cube's color to blue
cube.GetComponent<Renderer>().material.color = Color.blue;
}
else
{
Debug.LogError("Cube is not assigned!");
}
}
}
Tips:
- Check the Console for any errors or logs indicating issues.
- If you see the āCube is not assigned!ā error, revisit the inspector to confirm the assignments.
- Make sure your cube is active in the scene when you click the button.
If this does not resolve the issue, please let me know about any error messages you receive, or if you have specific details about your Unity setup that might affect the script.
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thread_gEROtLgJpZNtm5VF67h0wKEJ
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Hi Burhanuddin Limdiwala,
To assist you more effectively, could you please provide the following details?
- Error Messages: Are there any error messages in the Unity Console?
- Unity Version: Which version of Unity are you using?
- Inspector Setup: Can you confirm that the
cube
and changeColorButton
GameObjects are correctly assigned in the inspector?
- Scene Setup: Is there an Event System and Canvas present in your scene?
Providing these details will help diagnose the issue more accurately.
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thread_gEROtLgJpZNtm5VF67h0wKEJ
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I am not getting any error message
unity version 6.033f1
Inspector Setup:yes
Scene Setup :yes
Hi Burhanuddin_Limdiwal, Iām sorry but I canāt help you right now. You have reached the maximum number of replies.
. Please try again later or get a PRO license for more AI help.
**
Hi Burhanuddin_Limdiwal, Iām sorry but I canāt help you right now. You have reached the maximum number of replies.
. Please try again later or get a PRO license for more AI help.
**
To me it looks like what youāre showing here is a C# script inside Unity. Needle uses TypeScript components. Would recommend you take a look at our getting started docs.
The easiest way to change color on click is to use the SetMaterialOnClick component from our Everywhere Actions.
I have sent you a DM to verify your license since I canāt find a license registered using your name or email address. Thanks
import { Behaviour, serializable, findComponent, Object3D, MeshRenderer } from "@needle-tools/engine";
export class ChangeCubeColor extends Behaviour {
@serializable(Object3D)
cube?: Object3D;
@serializable()
buttonSelector: string = "#changeColorButton"; // e.g., "#myButton"
private _button?: HTMLButtonElement;
awake() {
this._button = document.querySelector(this.buttonSelector) as HTMLButtonElement;
if (this._button) {
this._button.addEventListener("click", () => this.changeColor());
}
}
changeColor() {
if (this.cube) {
const renderer = findComponent(this.cube, MeshRenderer);
if (renderer) {
renderer.setColor("#0000ff");
}
}
}
}
i have use this object 3d and find component error
Hi, could you please share the whole error message?
Your import statement is not correct. Object3D
needs to imported from three
like so: import { Object3D } from "three"
FindComponent does not exist. You probably mean findObjectOfType
? Or this.cube.getComponentInChildren(MeshRenderer)
and then set the color on the sharedMaterial (itās a threejs Material type so you might need to cast it to e.g. a MeshStandardMaterial and then set the color)
Please also take a look at Creating and using Components | Needle Engine Documentation to learn how to write custom scripts for Needle Engine
Could you also reply my question here? I want change color of cube by clicking a button - #10 by marwie1
Hereās some small example code for how to change the color - i hope it helps
Can you please provide me for button click and color change by script
Here you go Needle-engine Change Color Example - StackBlitz
import {
Behaviour,
Button,
MeshRenderer,
serializable,
} from '@needle-tools/engine';
import { Color } from 'three';
export class ChangeColor extends Behaviour {
@serializable(Button)
button?: Button;
@serializable(Color)
color?: Color;
@serializable(MeshRenderer)
target?: MeshRenderer;
onEnable(): void {
this.button?.onClick?.addEventListener(this.changeColor);
}
onDisable(): void {
this.button?.onClick?.removeEventListener(this.changeColor);
}
private changeColor = () => {
if (!this.color || !this.target) return;
for (const mat of this.target.sharedMaterials) {
if (mat && 'color' in mat && mat.color instanceof Color) {
mat.color.set(this.color);
}
}
};
}
Hi i am using pro version of needle from different account how to remove needle logo when loading
debug_console.ts:24
Tip: You can add the ā?consoleā query parameter to the url to show the debug console (on mobile it will automatically open in the bottom right corner when your get errors during development. In VR a spatial console will appear.)
Open this page to get the console: https://192.168.1.2:3000/?console=1
three.quarks.esm.js:3106 Particle system powered by three.quarks. https://quarks.art/
WebXRButtons.ts:218 [WebXR] āimmersive-arā is not supported on this device ā make sure your server runs using HTTPS and you have a device connected that supports immersive-ar
WebXRButtons.ts:218 [WebXR] āimmersive-vrā is not supported on this device ā make sure your server runs using HTTPS and you have a device connected that supports immersive-vr
engine_context.ts:1199 Frame #52
TypeError: Cannot read properties of undefined (reading āvisibleā)
at projectObject (three.module.js:30142:28)
at projectObject (three.module.js:30158:5)
at projectObject (three.module.js:30158:5)
at projectObject (three.module.js:30158:5)
at projectObject (three.module.js:30158:5)
at WebGLRenderer.render (three.module.js:29922:4)
at WebGLRenderer.wrappedFunction (engine_patcher.ts:135:41)
at renderer.render (lods_manager.js:156:34)
at WebGLRenderer.wrappedFunction [as render___needle] (engine_patcher.ts:135:41)
at _Context.renderNow (engine_context.ts:1470:18)
update @ engine_context.ts:1199
engine_context.ts:1199 Frame #53
TypeError: Cannot read properties of undefined (reading āvisibleā)
at projectObject (three.module.js:30142:28)
at projectObject (three.module.js:30158:5)
at projectObject (three.module.js:30158:5)
at projectObject (three.module.js:30158:5)
at projectObject (three.module.js:30158:5)
at WebGLRenderer.render (three.module.js:29922:4)
at WebGLRenderer.wrappedFunction (engine_patcher.ts:135:41)
at renderer.render (lods_manager.js:156:34)
at WebGLRenderer.wrappedFunction [as render___needle] (engine_patcher.ts:135:41)
at _Context.renderNow (engine_context.ts:1470:18)
update @ engine_context.ts:1199
engine_context.ts:1199 Frame #54
TypeError: Cannot read properties of undefined (reading āvisibleā)
at projectObject (three.module.js:30142:28)
at projectObject (three.module.js:30158:5)
at projectObject (three.module.js:30158:5)
at projectObject (three.module.js:30158:5)
at projectObject (three.module.js:30158:5)
at WebGLRenderer.render (three.module.js:29922:4)
at WebGLRenderer.wrappedFunction (engine_patcher.ts:135:41)
at renderer.render (lods_manager.js:156:34)
at WebGLRenderer.wrappedFunction [as render___needle] (engine_patcher.ts:135:41)
at _Context.renderNow (engine_context.ts:1470:18)
update @ engine_context.ts:1199
engine_context.ts:1201 Stopping render loop due to error
update @ engine_context.ts:1201
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Hi
The account youāre logged in with must be part of a team that has an active license. Then you can disable the branding or customize it. To add a new team member just go to your team page on Needle Cloud, select the team and invite the new member via email.
Please include some more details - Iām not sure what youāre asking here. It looks like thereās an error during the renderloop - if thatās the case feel free to report a bug via Unity (Needle Engine/Report a bug) so we can look at the scene/your assets. Otherwise itās hard to say more without more information.