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具体就是参考 官网 https://libgdx.com/wiki/graphics/3d/importing-blender-models-in-libgdx

blender 教程可以看八个案例教程带你从0到1入门blender【已完结】

这里贴一下过程图。
1.初始环境搭建略过。
2.打开blender
选中摄像机和灯光，右键进行删除。

3.选中正方体，点击材质

给正方体添加一个颜色，选中基础色，设置一个颜色。

点击视图着色方式，查看着色效果

4.导出fbx

缩放设置0.01，向前选中z向前
因为Blender 以 1 个单位 = 1 米的速度导出，而 libGDX 以 1 个单位 = 1 厘米的比例导入，使导入的模型大 100 倍。将导出选项从默认的 1.00 更改为 0.01 进行修复。更改 Blender fbx 导出选项。

下载最新版本的fbx-conv ，https://github.com/libgdx/fbx-conv，用于将导出的fbx转化为g3dj(libgdx使用的格式)
5.将导出的fbx和下载的fbx-conv放于同一文件夹下。
在目录上输入cmd回车

输入命令进行转换

得到转换文件cube.g3dj

在libgdx中进行应用。

将转换得到的cube.g3dj文件放在assets/data/下

最后代码

package top.xxx.xxx.blockgameinternal;import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.PerspectiveCamera;
import com.badlogic.gdx.graphics.VertexAttributes.Usage;
import com.badlogic.gdx.graphics.g3d.Environment;
import com.badlogic.gdx.graphics.g3d.Model;
import com.badlogic.gdx.graphics.g3d.ModelBatch;
import com.badlogic.gdx.graphics.g3d.ModelInstance;
import com.badlogic.gdx.graphics.g3d.attributes.ColorAttribute;
import com.badlogic.gdx.graphics.g3d.environment.DirectionalLight;
import com.badlogic.gdx.graphics.g3d.Material;
import com.badlogic.gdx.graphics.g3d.loader.G3dModelLoader;
import com.badlogic.gdx.graphics.g3d.utils.AnimationController;
import com.badlogic.gdx.graphics.g3d.utils.CameraInputController;
import com.badlogic.gdx.graphics.g3d.utils.ModelBuilder;
import com.badlogic.gdx.utils.JsonReader;/*** Example program that imports "myModel.g3dj" from the assets folder and renders it onto the screen.*/
public class ImportG3DJ implements ApplicationListener {private Environment environment;private PerspectiveCamera camera;private CameraInputController cameraController;private ModelBatch modelBatch;private Model model;private ModelInstance instance;@Overridepublic void create() {// Create an environment so we have some lightingenvironment = new Environment();environment.set(new ColorAttribute(ColorAttribute.AmbientLight, 0.4f, 0.4f, 0.4f, 1f));environment.add(new DirectionalLight().set(0.8f, 0.8f, 0.8f, -1f, -0.8f, -0.2f));modelBatch = new ModelBatch();// Create a perspective camera with some sensible defaultscamera = new PerspectiveCamera(67, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());camera.position.set(10f, 10f, 10f);camera.lookAt(0, 0, 0);camera.near = 1f;camera.far = 300f;camera.update();// Import and instantiate our model (called "myModel.g3dj")ModelBuilder modelBuilder = new ModelBuilder();model = new G3dModelLoader(new JsonReader()).loadModel(Gdx.files.internal("data/cube.g3dj"));instance = new ModelInstance(model);cameraController = new CameraInputController(camera);Gdx.input.setInputProcessor(cameraController);}@Overridepublic void render() {cameraController.update();// Clear the stuff that is left over from the previous render cycleGdx.gl.glViewport(0, 0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT | GL20.GL_DEPTH_BUFFER_BIT);// Let our ModelBatch take care of efficient rendering of our ModelInstancemodelBatch.begin(camera);modelBatch.render(instance, environment);modelBatch.end();}@Overridepublic void dispose() {modelBatch.dispose();model.dispose();}@Overridepublic void resize(int width, int height) { }@Overridepublic void pause() { }@Overridepublic void resume() { }
}

效果