Android 中opengl es灯光效果实例

一、还是要准备一张图片，放在res/drawable中

二、灯光效果代码：

/** * 设置灯光 *///设置环境光gl.glLightfv(GL10.GL_LIGHT1, GL10.GL_AMBIENT, AmbientBuffer);//设置漫射光gl.glLightfv(GL10.GL_LIGHT1, GL10.GL_DIFFUSE, diffuseBuffer);//设置灯光位置gl.glLightfv(GL10.GL_LIGHT1, GL10.GL_POSITION, positionBuffer);//启用1号灯光gl.glEnable(GL10.GL_LIGHT1);

三、实例代码如下：

1、activity类代码

import android.app.Activity;import android.opengl.GLSurfaceView;import android.os.Bundle;import android.view.KeyEvent;public class LightOpenglActivity extends Activity {LightRender lightRender ;GLSurfaceView glView;@Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);                initBitmap.init(this.getResources());                lightRender = new LightRender();        glView = new GLSurfaceView(this);        glView.setRenderer(lightRender);                setContentView(glView);    }// 处理事件    @Override    public boolean onKeyDown(int keyCode, KeyEvent event) {    lightRender.onKeyDown(keyCode, event);        return super.onKeyDown(keyCode, event);    }    @Override    public boolean onKeyUp(int keyCode, KeyEvent event) {    lightRender.onKeyUp(keyCode, event);        return super.onKeyUp(keyCode, event);    } }

2、渲染类代码：

import java.nio.ByteBuffer;import java.nio.ByteOrder;import java.nio.FloatBuffer;import java.nio.IntBuffer;import javax.microedition.khronos.egl.EGLConfig;import javax.microedition.khronos.opengles.GL10;import android.R.bool;import android.content.Context;import android.graphics.Bitmap;import android.opengl.GLSurfaceView.Renderer;import android.opengl.GLUtils;import android.view.KeyEvent;public class LightRender implements Renderer {/** * 渲染类 * author:pis */private Context context;private int one = 0x10000;private Bitmap bitmap;public boolean mFlag ;public boolean bLight = true;//是否开启灯光private int[] vertices;//顶点数组private int[] textCood;//纹理数组float step = 0.3f;float xrot,yrot; //旋转float xSpeed,ySpeed; //移动速度private int[] textures = new int[1];private IntBuffer vertexBuffer; //顶点缓冲private IntBuffer textCoodBuffer; //纹理缓冲/** * 设置灯光 * @param context *///环境光private float[] lightAmbient;private FloatBuffer AmbientBuffer;//漫射光private float[] lightDiffuse;private FloatBuffer diffuseBuffer;//光源位置private float[] lightPosition;private FloatBuffer positionBuffer;/** * 初始化缓冲数据 */private void initBuffer(){//顶点ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length * 4);vbb.order(ByteOrder.nativeOrder());vertexBuffer = vbb.asIntBuffer();vertexBuffer.put(vertices);vertexBuffer.position(0);//纹理ByteBuffer tbb = ByteBuffer.allocateDirect(textCood.length * 4 * 6);tbb.order(ByteOrder.nativeOrder());textCoodBuffer = tbb.asIntBuffer();for (int i = 0; i < 6; i++) {textCoodBuffer.put(textCood);}textCoodBuffer.position(0);//环境光ByteBuffer ambientbb = ByteBuffer.allocateDirect(lightAmbient.length * 4 * 6);ambientbb.order(ByteOrder.nativeOrder());AmbientBuffer = ambientbb.asFloatBuffer();AmbientBuffer.put(lightAmbient);AmbientBuffer.position(0);//漫射光ByteBuffer diffusebb = ByteBuffer.allocateDirect(lightDiffuse.length * 4 * 6);diffusebb.order(ByteOrder.nativeOrder());diffuseBuffer = diffusebb.asFloatBuffer();diffuseBuffer.put(lightDiffuse);diffuseBuffer.position(0);//灯光位置ByteBuffer positionbb = ByteBuffer.allocateDirect(lightPosition.length * 4 * 6);positionbb.order(ByteOrder.nativeOrder());positionBuffer = positionbb.asFloatBuffer();positionBuffer.put(lightPosition);positionBuffer.position(0);}/** * 初始化顶点、纹理、灯光数据 */private void initData(){//顶点数组vertices = new int[] { -one, -one, one, one, -one, one, -one, one, one,                one, one, one, one, -one, one, one, -one, -one, one, one, one,                one, one, -one, one, -one, -one, -one, -one, -one, one, one,                -one, -one, one, -one, -one, -one, -one, -one, -one, one, -one,                one, -one, -one, one, one, -one, one, -one, one, one, -one,                -one, one, one, one, one, one, -one, -one, -one, -one, -one,                one, one, -one, -one, one, -one, one };//纹理数组,贴图时注意android中坐标与OpengGL 中定义的不同，android，y轴是向下的textCood = new int[] { 0, 0, one, 0, 0, one, one, one };//灯光lightAmbient = new float[]{0.5f,0.5f,0.5f,1.0f};lightDiffuse = new float[]{1.0f,1.0f,1.0f,1.0f};lightPosition = new float[]{0.0f,0.0f,2.0f,1.0f};}public LightRender() {initData();initBuffer();}@Overridepublic void onDrawFrame(GL10 gl) {//清除颜色和深度缓存gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);gl.glLoadIdentity();//启用灯光gl.glEnable(GL10.GL_LIGHTING);//启用顶点和纹理缓存gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);//移动和旋转设置gl.glTranslatef(0.0f, 0.0f, -6.0f);gl.glRotatef(xrot, 1.0f, 0.0f, 0.0f);gl.glRotatef(yrot, 0.0f, 1.0f, 0.0f);//设置顶点和纹理,经常忘记设置，唉！gl.glVertexPointer(3, GL10.GL_FIXED, 0, vertexBuffer);gl.glTexCoordPointer(2,GL10.GL_FIXED,0,textCoodBuffer);//绘制六个面，贴图for (int i = 0; i < 6; i++) {gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, i * 4, 4);}//取消缓存，需我们自己手动gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);gl.glLoadIdentity();if (mFlag) {xrot += 0.5f;yrot += 0.5f;}if (!bLight) {gl.glDisable(GL10.GL_LIGHT1);} else {gl.glEnable(GL10.GL_LIGHT1);}}@Overridepublic void onSurfaceChanged(GL10 gl, int width, int height) {//场景大小gl.glViewport(0, 0, width, height);float ratio = (float) width / height;//投影矩阵gl.glMatrixMode(GL10.GL_PROJECTION);//重置下gl.glLoadIdentity();//视图大小设置gl.glFrustumf(-ratio, ratio, -1, 1, 1, 10);//观察模型gl.glMatrixMode(GL10.GL_MODELVIEW);gl.glLoadIdentity();}@Overridepublic void onSurfaceCreated(GL10 gl, EGLConfig config) {//透视效果gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_FASTEST);//清屏gl.glClearColor(0, 0, 0, 0);//启用阴影平滑gl.glShadeModel(GL10.GL_SMOOTH);//清除深度缓存gl.glClearDepthf(one);//启用深度缓存gl.glEnable(GL10.GL_DEPTH_TEST);//深度缓存模式gl.glDepthFunc(GL10.GL_LEQUAL);/** * 设置纹理 *///启用纹理gl.glEnable(GL10.GL_TEXTURE_2D);//创建纹理gl.glGenTextures(1, textures, 0);//绑定纹理gl.glBindTexture(GL10.GL_TEXTURE_2D, textures[0]);//生成纹理GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, initBitmap.bitmap, 0);//线性滤波处理gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER,GL10.GL_LINEAR);gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER,GL10.GL_LINEAR);/** * 设置灯光 *///设置环境光gl.glLightfv(GL10.GL_LIGHT1, GL10.GL_AMBIENT, AmbientBuffer);//设置漫射光gl.glLightfv(GL10.GL_LIGHT1, GL10.GL_DIFFUSE, diffuseBuffer);//设置灯光位置gl.glLightfv(GL10.GL_LIGHT1, GL10.GL_POSITION, positionBuffer);//启用1号灯光gl.glEnable(GL10.GL_LIGHT1);}/** * 操作键盘上的上、下、左、右、确认键进行正方体的翻转和灯光操作 * @param keyCode * @param event * @return */    public boolean onKeyDown(int keyCode, KeyEvent event)    {        switch ( keyCode )        {            case KeyEvent.KEYCODE_DPAD_UP:                mFlag  = true;                xSpeed =-step;                break;            case KeyEvent.KEYCODE_DPAD_DOWN:                mFlag  = true;                xSpeed = step;                break;            case KeyEvent.KEYCODE_DPAD_LEFT:                mFlag  = true;                ySpeed =-step;                break;            case KeyEvent.KEYCODE_DPAD_RIGHT:                mFlag  = true;                ySpeed =step;                break;            case KeyEvent.KEYCODE_DPAD_CENTER:                bLight = !bLight;                break;        }        return false;    }       public boolean onKeyUp(int keyCode, KeyEvent event)    {        mFlag = false;        return false;    } }

3、初始化bitmap类代码

import android.content.res.Resources;import android.graphics.Bitmap;import android.graphics.BitmapFactory;public class initBitmap {public static Bitmap bitmap;public static void init(Resources res){bitmap = BitmapFactory.decodeResource(res, R.drawable.balloons) ;}}

4、运行效果

按键盘中的确认键后效果图：

好像搞的太黑了，其实是有图的，认真看下把，呵呵。。

就这么多了