Blender model have two materials,uv maps and textures, how switch texture?

[AdiDOS]

Since you forgot the texture, then an example without textures.

	Spatial Model = assetManager.loadModel("player-test-fix.j3o");
	rootNode.attachChild(Model);

	SceneGraphVisitor searchGeomMat = new SceneGraphVisitor() {

		public void visit(Spatial spatial) {

			System.out.println("Geometry =" + spatial);

			if (spatial instanceof Geometry) {

				Geometry geom = (Geometry) spatial;

				System.out.println("Material =" + geom.getMaterial());

			}

		}

	};

	Model.depthFirstTraversal(searchGeomMat);

[nnpa]

Geometry =base.obj1 (Geometry)
Material =Army
Geometry =base.obj2 (Geometry)
Material =null
Geometry =base.obj3 (Geometry)
Material =null
Geometry =base.obj4 (Geometry)
Material =null
Geometry =base.obj (Node)
Geometry =Armature (Node)
Geometry =Lamp (LightNode)
Geometry =Camera (CameraNode)

Thank’s.

model have only assigned in blender material.

I think need:

1. assign material
2. save (serialize) material
3. load needed material

[AdiDOS]

Here’s an example of replacing a material, if you want to do it later, just assign it a variable.

	Spatial Model = assetManager.loadModel("player-test-fix.j3o");
	rootNode.attachChild(Model);

	SceneGraphVisitor searchGeomMat = new SceneGraphVisitor() {

		public void visit(Spatial spatial) {

			if (spatial instanceof Geometry) {

				Geometry geom = (Geometry) spatial;

				if (geom.getMaterial().getName().equals("Spec")) {

					Material mat = geom.getMaterial();
					Model.setMaterial(mat);

				}

			}

		}

	};

	Model.depthFirstTraversal(searchGeomMat);

EDIT: This can be interesting.

https://jmonkeyengine.github.io/wiki/jme3/advanced/save_and_load.html

[nnpa]

Thanks. Have null and army:

Think use this:

1. get material
2. serialize
3. load material

/*

• To change this license header, choose License Headers in Project Properties.
• To change this template file, choose Tools | Templates
• and open the template in the editor.
  */
  package custom;

import com.jme3.material.Material;
import java.io.Serializable;

/**
*

• @author nn
  */
  public class MaterisalSerializable extends Material implements Serializable {

}

/*

• To change this license header, choose License Headers in Project Properties.
• To change this template file, choose Tools | Templates
• and open the template in the editor.
  */
  package custom;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.Base64;

/**
*

• @author nn
  */
  public class Serialize {

  private static Object fromString( String s ) throws IOException, ClassNotFoundException {
  byte data = Base64.getDecoder().decode( s );
  ObjectInputStream ois = new ObjectInputStream(
  new ByteArrayInputStream( data ) );
  Object o = ois.readObject();
  ois.close();
  return o;
  }

/** Write the object to a Base64 string. */
private static String toString( Serializable o ) throws IOException {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ObjectOutputStream oos = new ObjectOutputStream( baos );
    oos.writeObject( o );
    oos.close();
    return Base64.getEncoder().encodeToString(baos.toByteArray()); 
}

}

[AdiDOS]

I do not think it’s right, it’s better to get all the parameters of the material and make the file readable in text form. You can edit it later with your hands. And it’s better to create it manually at once.

[nnpa]

Material file contains big lists and hash maps.

Write material with hands - big work.

Simple serialize object to string

[nnpa]

Node node = (Node) assetManager.loadModel(modelPath);
Geometry myGeo = (Geometry)node.getChild(“base.obj1”);

        Material material = myGeo.getMaterial();
        
        MaterisalSerializable materialSerializ = (MaterisalSerializable) material;

java.lang.RuntimeException: Uncompilable source code - incompatible types: com.jme3.material.Material cannot be converted to custom.MaterisalSerializable

But MaterisalSerializable extends Material

[nnpa]

As you propose to do?

[AdiDOS]

System.out.println(mat.getParams());

Based on them, create a material file: j3m

Material My shiny custom material : Common/MatDefs/Light/Lighting.j3md {
     MaterialParameters {
        DiffuseMap : Textures/Terrain/Pond/Pond.jpg
        NormalMap : Textures/Terrain/Pond/Pond_normal.png
        UseMaterialColors : true
        Specular : 1.0 1.0 1.0 1.0
        Diffuse : 1.0 1.0 1.0 1.0
        Shininess : 64.0
     }
}

The problem can arise with obtaining all the parameters.

[nnpa]

Maybe i get all parameters from material.
Add to class for save (serrialize).
Add set when it need?

[AdiDOS]

I have nothing to say.

[nnpa]

Thank’s i believe i solve this problem. I post answer later

[nnpa]

Next error

Vector4 variable

package custom; //import static com.jme3.shader.VarType.Texture2D; import com.jme3.shader.VarType.Vector4; import com.jme3.texture.Texture2D; import java.io.Serializable; /** * * @author nn */ public class MaterisalParams implements Serializable { public Vector4 diffuse; public boolean useMaterialColors; public float parallaxHeight; public Vector4 ambient; public boolean backfaceShadows; public Texture2D diffuseMap; public Vector4 specular; …

[nnpa]

I try to:

1. create material
2. add map
3. add change in scene composer

material switch but uv coordinates no asinged

[nnpa]

This video:

jME SDK Usecase Demo 2

[nnpa]

I generate tangents change texture position on model
not by uv in blender