libgdx系列之－加载obj(3D文件)

原文链接：http://blog.csdn.net/cng1991/article/details/7293946

今天看了下libgdx，觉得加载3d模型的功能很炫。所以分享下代码。

首先用blender(开源的3D模型工具，百度即可搜到)新建一个工程,然后导出为cube.obj。最主要的是获取obj文件。将.obj文件放在android工程的assets/data目录下。然后搭建android下的libgdx环境，即导入架包。

然后编写代码：

package com.cng;




import android.os.Bundle;

import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.backends.android.AndroidApplication;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL10;
import com.badlogic.gdx.graphics.Mesh;
import com.badlogic.gdx.graphics.PerspectiveCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.Texture.TextureFilter;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.graphics.g3d.loaders.ModelLoaderOld;
import com.badlogic.gdx.utils.ScreenUtils;




public class MyGameActivity extends AndroidApplication {

    class MyGameListen  implements ApplicationListener
    {
        SpriteBatch batch;
        Texture texture;
        TextureRegion fbteRegion;
        BitmapFont font;
        PerspectiveCamera camera;
        Mesh mesh;
        Color clearColor=new Color(0.2f, 0.2f, 0.2f, 1);
        float angle;
        @Override
        public void create()
        {
            mesh=ModelLoaderOld.loadObj(Gdx.files.internal("data/cube.obj").read());
            texture=new Texture(Gdx.files.internal("data/badlogic.jpg"),true);
            texture.setFilter(TextureFilter.MipMap, TextureFilter.Linear);

            batch=new SpriteBatch();
            font=new BitmapFont();

            camera=new PerspectiveCamera(67, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
            camera.position.set(3, 3, 3);
            camera.direction.set(-1, -1, -1);
        }
        @Override
        public void dispose()
        {

        }

        @Override
        public void pause()
        {

        }

        @Override
        public void render()
        {
            GL10 gl=Gdx.graphics.getGL10();
            gl.glViewport(0, 0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
            gl.glClearColor(clearColor.r, clearColor.g, clearColor.b, clearColor.a);
            gl.glClear(GL10.GL_COLOR_BUFFER_BIT|GL10.GL_DEPTH_BUFFER_BIT);
            gl.glEnable(GL10.GL_DEPTH_TEST);
            gl.glEnable(GL10.GL_TEXTURE_2D);

            camera.update();
            camera.apply(gl);
            angle+=45*Gdx.graphics.getDeltaTime();
            gl.glPushMatrix();
            gl.glRotatef(angle, 1, 0, 0);
            texture.bind();
            mesh.render(GL10.GL_TRIANGLES);
            gl.glPopMatrix();
            if(fbteRegion==null||Gdx.input.justTouched())
            {
                if(fbteRegion!=null) fbteRegion.getTexture().dispose();
                fbteRegion=ScreenUtils.getFrameBufferTexture();
            }
            batch.begin();
            if(fbteRegion!=null)
            {
                batch.draw(fbteRegion, 0, 0, 100, 100);
            }
            batch.end();
        }

        @Override
        public void resize(int arg0, int arg1)
        {

        }

        @Override
        public void resume()
        {
        }




    }


    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        initialize(new MyGameListen(), false);
    }

}

因为我是libgdx的初学者，里面有些代码不能解释，所以就先不解释了，只是提供一个例子。