原文链接:http://blog.youkuaiyun.com/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);
- }
- }
效果图如下:
估计91助手的屏幕截图有点问题,这正方体看起来有点弯曲,但实际就是一个四四方方的正方体,并在旋转。