How to change the material correctly

Help & Support
1

Hi. Help me solve the problem. I have an array of materials. I need to apply them to game objects.When I change the texture, all objects have the same textures

forEach((elem,i)=>{
    var newEl = el.clone()
    newEl.name = 'BoxTemplate'+ i
    newEl.rigidbody.teleport(0,0,5)
    this.app.root.addChild(newEl)
    newEl.model.meshInstances[0].material.diffuseMap = this.app.textureItem[i]
    newEl.model.meshInstances[0].material.update()
})

in this code, I change textures, and I also have materials

2

Hi @sergey_ch,

To update the material you use the following line, no need for calling .update() unless you are changing a material property:

newEl.model.meshInstances[0].material = newMaterial;
3

When I try to do this, I get errors:
Uncaught TypeError: Cannot read property ‘cull’ of undefined

 const newMaterial = this.app.material[i]
  newEl.model.meshInstances[0].material = newMaterial

Если не трудно, можешь посмотреть в редакторе? ссылку в личку пришлю

4

newMaterial was just an example variable. You need to replace that variable with the materials you keep in your materials array.

5

I did it.

const newMaterial = this.app.material[i]
1 Like
6

Try debugging then if the following is an actual material using the browser console:

const newMaterial = this.app.material[i];
console.log(newMaterial);
7

Did, it’s standartmaterial, and it’s weird

8

it generates an error endlessly. Look in the editor, I sent the link

9

First of all one good advice is avoid spamming the pc.Application reference, since you may override required properties. For example instead of doing the following in your scripts:

    this.app.level = 1
    this.app.state = null

Just do this:

    this.level = 1
    this.state = null

The error that you get indicates that somewhere you passed undefined/null for material, check your loop again. I did take a look but it’s too much code to debug like that:

image

10

Figured out the error cycle. Put an insert of the primitive after the assignment of the material. Now here is such a mistake. You don’t know what that means?
Cannot read property ‘blendType’ of undefined

11

Yes, that means that a material you pass to a mesh instance is undefined.