本文是生成一个半透明的纹理贴图画像，demo如下：
package com.example.zp.a3dword; import android.graphics.Bitmap;import android.opengl.GLSurfaceView;import android.opengl.GLUtils; import java.nio.ByteBuffer;import java.nio.FloatBuffer;import java.nio.IntBuffer; import javax.microedition.khronos.egl.EGLConfig;import javax.microedition.khronos.opengles.GL10; /** * Created by lenovo on 2016/9/7. */public class GLRenderer implements GLSurfaceView.Renderer{ float xrot, yrot, zrot; int textureSize = 2; int texture[] = new int [textureSize]; int one = 0x10000; private Bitmap mBitmap[]; //正方体的6个面，4个点确定一个面 IntBuffer vertices = BufferUtil.intToBuffer(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 }); IntBuffer texCoords2 = BufferUtil.intToBuffer(new int[]{ 0, one, one, one, 0, 0, one, 0, 0, 0, 0, one, one, 0, one, one, one, one, one, 0, 0, one, 0, 0, 0, one, one, one, 0, 0, one, 0, 0, 0, 0, one, one, 0, one, one, one, 0, 0, 0, one, one, 0, one, }); public GLRenderer(Bitmap mBitmap[]) { this.mBitmap = mBitmap; } @Override public void onDrawFrame(GL10 gl) { // 清除屏幕和深度缓存 gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT); // 重置当前的模型观察矩阵 gl.glEnable(GL10.GL_LIGHTING); gl.glLoadIdentity();// 通过修改z的值，发现屏幕是处在-1层，因此若想物体显示出来必须在屏幕内的-1层以下
gl.glTranslatef(0.0f, 0.0f, -4f); //设置3个方向的旋转 gl.glRotatef(xrot, 1.0f, 0.0f, 0.0f); gl.glRotatef(yrot, -1.0f, 0.0f, 0.0f); gl.glRotatef(zrot, 0.0f, 0.0f, 1.0f); gl.glEnableClientState(GL10.GL_VERTEX_ARRAY); gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);//启用纹理映射 gl.glVertexPointer(3, GL10.GL_FIXED, 0, vertices); gl.glTexCoordPointer(2, GL10.GL_FIXED, 0, texCoords2); gl.glBindTexture(GL10.GL_TEXTURE_2D, texture[1]); for(int i = 0 ; i < 6 ; i ++) { gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP , i*4 , 4); gl.glFinish(); } gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY); gl.glDisableClientState(GL10.GL_VERTEX_ARRAY); xrot+=0.5f; yrot+=0.2f; zrot+=0.3f; } @Override public void onSurfaceChanged(GL10 gl, int width, int height) { float ratio = (float) width / height; //设置OpenGL场景的大小 gl.glViewport(0, 0, width, height); //设置投影矩阵 gl.glMatrixMode(GL10.GL_PROJECTION); //重置投影矩阵 gl.glLoadIdentity(); // 设置视口的大小 gl.glFrustumf(-ratio, ratio, -1, 1, 1, 10); // 选择模型观察矩阵 gl.glMatrixMode(GL10.GL_MODELVIEW); // 重置模型观察矩阵 gl.glLoadIdentity(); } @Override public void onSurfaceCreated(GL10 gl, EGLConfig config) { // 黑色背景 gl.glClearColor(0, 0, 0, 0);// 这里千万别加这条，它让纹理只贴在图形表面，而正方体内部是黑色的，因此如果启用了，我们就看不到透明的立方体了
// gl.glEnable(GL10.GL_CULL_FACE); // 启用阴影平滑 gl.glShadeModel(GL10.GL_SMOOTH); // 启用深度测试 gl.glEnable(GL10.GL_DEPTH_TEST); // 启用混合模式 gl.glEnable(GL10.GL_BLEND); gl.glDisable(GL10.GL_DEPTH_TEST); // 关闭深度测试 //设置光线,,1.0f为全光线，a=50% gl.glColor4f(1.0f,1.0f,1.0f,0.5f); // 基于源象素alpha通道值的半透明混合函数 gl.glBlendFunc(GL10.GL_SRC_ALPHA,GL10.GL_ONE); //启用纹理映射 gl.glClearDepthf(1.0f); //深度测试的类型 gl.glDepthFunc(GL10.GL_LEQUAL); //精细的透视修正 gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_NICEST); //允许2D贴图,纹理 gl.glEnable(GL10.GL_TEXTURE_2D); getTextures(gl); //设置光颜色 FloatBuffer lightAmbient = BufferUtil.floatToBuffer(new float[]{ 1f, 1f, 1f, 1f } ); FloatBuffer lightDiffuse = BufferUtil.floatToBuffer(new float[]{ 1f,1f,1f,1f } ); //定义光源位置 FloatBuffer lightPosition = BufferUtil.floatToBuffer(new float[]{ -2f,0f,-4f,1f } ); // //设置环境光 gl.glLightfv(GL10.GL_LIGHT1, GL10.GL_AMBIENT, lightAmbient); //设置漫射光 gl.glLightfv(GL10.GL_LIGHT1, GL10.GL_DIFFUSE, lightDiffuse); //设置光源位置 gl.glLightfv(GL10.GL_LIGHT1, GL10.GL_POSITION, lightPosition); //开启一号光源 gl.glEnable(GL10.GL_LIGHT1); } private void getTextures(GL10 gl) { IntBuffer intBuffer = IntBuffer.allocate(2);//申请2个纹理存储空间 // 创建纹理 gl.glGenTextures(2 , intBuffer); //创建2个纹理，绑定intuffer texture[0] = intBuffer.get(); // 获取第一个纹理的存储指针，即纹理存储位置，位置+1 texture[1] = intBuffer.get(); //获取下一个纹理存储的位置 // 设置要使用的纹理 gl.glBindTexture(GL10.GL_TEXTURE_2D, texture[0]); //生成纹理 GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0 , mBitmap[0] , 0);//利用图mBitmap[0]生成纹理，存储在texture[0] // 线形滤波 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); //生成第二个纹理 gl.glBindTexture(GL10.GL_TEXTURE_2D, texture[1]); GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0 , mBitmap[1] , 0);//利用图mBitmap[0]生成纹理，存储在texture[1] 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); }}