睡觉之前再记录一点，也算是自己学习的小总结吧，前段时间总能看见有人问怎么为一个物体的每一面贴不同的纹理图，我这有个为金字塔形状四面贴不同纹理图的例子，拿出来整理分享一下，有需要的同志们可以看一看。
不废话了，上代码，
第一步： Main.java
在入口Activity中定义一个内部类，用于获取Bitmap用的
class BitGL { public static Bitmap bitmap; public static void init(Resources resources) { bitmap = BitmapFactory.decodeResource(resources, R.drawable.walla); }}第二步：在MySurfaceView.java中的onSurfaceCreated()方法中初始化金字塔类，并赋相应的值
py = new Pyramid(gl,15.0f, 2.6f, 5.0f, 0, mContext); // 初始化金字塔绘制金字塔的时候在onDrawFrame()方法中调用py.drawSlef(gl); 画金字塔
第三步：然后就是画金字塔并贴图了，注意，这是一个单独的类
public class Pyramid { Context mContext = null; private int one = 0x10000; public float mAngleX; public float mAngleY; private IntBuffer mVertexBuffer; private FloatBuffer mTexBuffer; FloatBuffer lightDiffuse = FloatBuffer.wrap(new float[] { 0.5f, 0.5f, 0.5f, 1.0f }); FloatBuffer specularParams = FloatBuffer.wrap(new float[] { 0.5f, 1.0f, 0.5f, 1.0f }); FloatBuffer lightPosition = FloatBuffer.wrap(new float[] { 0.3f, 0.0f, 2.0f, 1.0f }); int vertices[] = { 0, one, 0, -one, -one, one, one, -one, one, 0, one, 0, one, -one, one, one, -one, -one, 0, one, 0, one, -one, -one, -one, -one, -one, 0, one, 0, -one, -one, -one, -one, -one, one }; //纹理点 private int[] texCoords = { 0, one,one, one,0, 0, one, 0 }; float x, y, z; boolean isY = true; private Bitmap bitmap; private int[] textureids=null; private IntBuffer texBuffer; private Bitmap[] bit =new Bitmap[4]; public Pyramid(GL10 gl,float x, float y, float z, float rot,Context context) { this.mContext = context; this.x = x; this.y = y; this.z = z; ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length * 4); vbb.order(ByteOrder.nativeOrder()); mVertexBuffer = vbb.asIntBuffer(); mVertexBuffer.put(vertices); mVertexBuffer.position(0); // 初始化 textureids = new int[4]; bit[0]=BitmapFactory.decodeResource(mContext.getResources(), R.drawable.walla); bit[1]=BitmapFactory.decodeResource(mContext.getResources(), R.drawable.wallb); bit[2]=BitmapFactory.decodeResource(mContext.getResources(), R.drawable.walld); bit[3]=BitmapFactory.decodeResource(mContext.getResources(), R.drawable.wallf); // 实例化bitmap bitmap = BitGL.bitmap; ByteBuffer tbbs = ByteBuffer.allocateDirect(texCoords.length * 3 * 4); tbbs.order(ByteOrder.nativeOrder()); texBuffer = tbbs.asIntBuffer(); //为每一个面贴上纹理 for (int i = 0; i < 3; i++) { texBuffer.put(texCoords); } texBuffer.position(0); /*********贴图开始********/ //打开纹理 gl.glEnable(GL10.GL_TEXTURE_2D); IntBuffer ib = IntBuffer.allocate(4); gl.glGenTextures(4, ib); textureids = ib.array(); //gl.glGenTextures(4, textureids, 0); //4个纹理个数，用于四面 // 绑定要使用的纹理 gl.glBindTexture(GL10.GL_TEXTURE_2D, textureids[0]); // 生成纹理 GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bit[0], 0); // 线性滤波 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); gl.glBindTexture(GL10.GL_TEXTURE_2D, textureids[1]); GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bit[1], 0); 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); gl.glBindTexture(GL10.GL_TEXTURE_2D, textureids[2]); GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bit[2], 0); 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); gl.glBindTexture(GL10.GL_TEXTURE_2D, textureids[3]); GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bit[3], 0); 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); /*********贴图结束********/ } public void drawSlef(GL10 gl) { gl.glPushMatrix(); gl.glTranslatef(x, y, z); // 绘制对象的位置 //gl.glRotatef(mAngleX, 0, 1, 0); // 对象的X旋转角度 //gl.glRotatef(mAngleY, 1, 0, 0); // 对象的Y旋转角度 gl.glEnableClientState(GL10.GL_VERTEX_ARRAY); gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);// 使用纹理数组 gl.glVertexPointer(3, gl.GL_FIXED, 0, mVertexBuffer); gl.glTexCoordPointer(2, GL10.GL_FIXED, 0, texBuffer); // Define for (int i = 0; i < 4; i++) { // 创建纹理 gl.glBindTexture(GL10.GL_TEXTURE_2D, textureids[i]); gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, i * 3, 3); } gl.glDisable(GL10.GL_TEXTURE_2D);// 关闭纹理 gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY); gl.glDisableClientState(GL10.GL_VERTEX_ARRAY); gl.glLoadIdentity(); mAngleX++; if (isY) { mAngleY = mAngleY + 0.01f; if (mAngleY > 1.8) { isY = false; } } else { mAngleY = mAngleY - 0.01f; if (mAngleY < -2.5) { isY = true; } } gl.glPopMatrix(); }下面是Pyramid.java类的下载,有些多余的调试代码，可以删掉