How set texture in Renderer?

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How set texture in Renderer ?

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Hi oot4chi! To set a texture in a Renderer component within Needle Engine, you typically work with the texture property defined in a variety of rendering classes. Here’s a simplified approach based on the existing methods:

  1. Set the texture directly on the material: You can assign a Texture object to a material in the Renderer. Make sure your material is created and available.

  2. Using the SpriteRenderer: If you are working with a SpriteRenderer, you can directly set the texture using the set texture method.

Here’s an example of how to set a texture in the SpriteRenderer:

import { SpriteRenderer, Texture } from "@needle-tools/engine";

// Assuming you have a reference to your `gameObject`
const spriteRenderer = gameObject.addComponent(SpriteRenderer);

// Create or load the texture
const myTexture = new Texture(); // Assume you've initialized this Texture with image data

// Set the texture
spriteRenderer.texture = myTexture;

For a more generic Renderer class, you could do something like this:

import { Renderer, Material, Texture } from "@needle-tools/engine";

// On your game object
const renderer = gameObject.addComponent(Renderer);

// Create a new material and assign a texture
const myMaterial = new Material();
const myTexture = new Texture(); // Assume you've initialized this Texture properly

myMaterial.map = myTexture; // Assign texture to the material
renderer.sharedMaterial = myMaterial; // Set the material in the renderer

Make sure your texture is properly loaded before assignment to avoid rendering issues. For further information on rendering or manipulating materials, check out the Needle Engine documentation (see the documentation).

Feel free to ask if you need more specific examples or further clarifications!

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Set texture in 3d object via script

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Hi oot4chi! To set a texture on a 3D object via script in Needle Engine, you can do it as follows. Here’s a step-by-step approach using a Mesh object:

  1. Create or Load Your Texture: Initialize your texture.

  2. Create or Get a Mesh: Ensure you have a 3D object to apply your texture to.

  3. Set the Texture on Material: Assign the texture to the material of your mesh.

Here’s a code example demonstrating this process:

import { Mesh, MeshBasicMaterial, Texture, PlaneGeometry } from "@needle-tools/engine";

// Create a new texture (ensure it is properly loaded)
const myTexture = new Texture(); // Replace with your texture initialization logic

// Create a geometry and a material
const geometry = new PlaneGeometry(1, 1); // Change dimensions as necessary
const material = new MeshBasicMaterial({ map: myTexture }); // Set the texture

// Create a Mesh
const mesh = new Mesh(geometry, material);

// Optionally, add the mesh to your scene or parent object
scene.add(mesh); // Make sure `scene` is defined as your 3D scene instance

Steps Breakdown:

  • Texture Creation: This could involve loading an image file into the Texture object.
  • Material Assignment: The texture is set in the map property of MeshBasicMaterial.
  • Mesh Creation: A Mesh combines geometry and material into a 3D object that can be rendered in the scene.

Make sure to load your texture properly and to handle any asynchronous loading if you’re fetching textures externally. For more information, refer to Needle Engine documentation for components or the Three.js documentation for materials (see the documentation).

Let me know if you need further details or assistance!

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5

why cant use this?

 this.targetRenderer.sharedMaterial["map"] = texture;

image
image1148×175 16.7 KB

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Hi oot4chi! The line you’ve written to set the texture on sharedMaterial might not work due to how properties are accessed in the Needle Engine or the specific API being used.

Here are some potential reasons and solutions:

  1. Property Not Found: The property map may not exist on the sharedMaterial object as expected. Instead, check the documentation to ensure you are accessing the correct property to set the texture.

  2. Using a Material Instance: In some cases, you may need to create or alter a specific instance of the material rather than trying to modify the shared material directly. Instead, try cloning the material:

    const material = this.targetRenderer.sharedMaterial.clone();
material.map = texture; // Set your texture here
this.targetRenderer.sharedMaterial = material; // Assign the updated material

  3. Type Checking: Ensure the sharedMaterial is of the correct type that supports the texture mapping you are trying to apply. If it’s a different material type, the property access may change.

  4. Context of this: Confirm that this.targetRenderer is correctly pointing to a valid Renderer instance when you execute that line. Use console.log(this.targetRenderer) before the assignment to verify.

  5. Texture Loading: Make sure that the texture itself is fully loaded before assigning it. You may need to add a callback or check the loading state.

If these suggestions don’t resolve the issue, please provide any error messages or additional context from your environment that can help diagnose the problem further!

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Hi @oot4chi

sharedMaterial is of type [Material](https://threejs.org/docs/#api/en/materials/Material) - this is the basic three.js material class because it can be a PBR material or Unlit material or custom shader.

You need to cast the material (and not clone!!! as the bot suggested, that’s wrong).

e.g. here’s one way to do it: (for MeshStandardMaterial)

if(this.targetRenderer.sharedMaterial instanceOf MeshStandardMaterial) {
  this.targetRenderer.sharedMaterial.map = texture
}

or

const mat = this.targetRenderer.sharedMaterial;
if("map" in mat ) {
  mat .map = texture
}
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