初次提交

第14章 片元着色器的妙用/Sample14_9/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="src" path="gen"/>
+	<classpathentry kind="con" path="com.android.ide.eclipse.adt.ANDROID_FRAMEWORK"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

第14章 片元着色器的妙用/Sample14_9/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Sample14_9</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>com.android.ide.eclipse.adt.ResourceManagerBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>com.android.ide.eclipse.adt.PreCompilerBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>com.android.ide.eclipse.adt.ApkBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>com.android.ide.eclipse.adt.AndroidNature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

第14章 片元着色器的妙用/Sample14_9/.settings/org.eclipse.jdt.core.prefs

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+#Wed Jan 05 21:56:15 CST 2011
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.6
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.6

第14章 片元着色器的妙用/Sample14_9/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+      android:versionCode="1"
+      android:versionName="1.0" package="com.bn.Sample14_9">
+    <application android:icon="@drawable/icon" android:label="@string/app_name">
+        <activity android:name="com.bn.Sample14_9.Sample14_9_Activity" 
+                  android:label="@string/app_name">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+    <uses-sdk android:targetSdkVersion="8"></uses-sdk>
+</manifest> 

第14章 片元着色器的妙用/Sample14_9/assets/frag_tex.sh

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+precision mediump float;
+varying vec2 vTexPosition; //转换后纹理坐标
+const float maxIterations = 999.0;//最大迭代次数
+const float zoom = 0.6;//缩放系数  
+const float xCenter = 0.0;//中心坐标位置  
+const float yCenter = 0.0;
+const vec3 innerColor = vec3(0.0, 0.0, 1.0);//内部颜色
+const vec3 outerColor1 = vec3(1.0, 0.0, 0.0);//外部颜色1
+const vec3 outerColor2 = vec3(0.0, 1.0, 0.0);//外部颜色2
+void main() {  
+	float real = vTexPosition.x * zoom + xCenter;//变换当前位置 
+	float imag = vTexPosition.y * zoom + yCenter;	
+	float cReal = 0.32;//c的实部
+	float cImag =0.043;//c的虚部	
+	float r2 = 0.0;//半径的平方
+	float i;//迭代次数  
+	for(i=0.0; i<maxIterations && r2<4.0; i++){//循环迭代
+		float tmpReal = real;//保存当前实部值		
+		real = (tmpReal * tmpReal) - (imag * imag) +cReal;//计算下一次迭代后实部的值
+		imag = 2.0 *tmpReal * imag +cImag;//计算下一次迭代后虚部的值
+		r2 = (real * real) + (imag * imag);//计算半径的平方
+	}
+    vec3 color;    
+    if(r2 < 4.0){//如果r2未达到4就退出了循环，表明迭代次数已达到最大值
+    	color = innerColor;//为内部颜色赋值
+    }else{//如果因r2大于4.0而退出循环，表明此位置在外部
+    	color = mix(outerColor1, outerColor2, fract(i * 0.07));//按迭代次数为外部颜色赋不同的值
+    }    
+   	gl_FragColor = vec4(color, 1.0);//为最终颜色赋值   
+}              

第14章 片元着色器的妙用/Sample14_9/assets/vertex_tex.sh

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+uniform mat4 uMVPMatrix; //总变换矩阵
+attribute vec3 aPosition;  //顶点位置
+attribute vec2 aTexCoor;    //顶点纹理坐标
+varying vec2 vTexPosition; //转换后纹理坐标
+void main() {                            		
+   gl_Position = uMVPMatrix * vec4(aPosition,1); //根据总变换矩阵计算此次绘制此顶点位置
+   vTexPosition = (aTexCoor-0.5)*5.0;//将接收的纹理坐标传递给片元着色器
+}

第14章 片元着色器的妙用/Sample14_9/default.properties

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+# This file is automatically generated by Android Tools.
+# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
+# 
+# This file must be checked in Version Control Systems.
+# 
+# To customize properties used by the Ant build system use,
+# "build.properties", and override values to adapt the script to your
+# project structure.
+
+# Indicates whether an apk should be generated for each density.
+split.density=false
+# Project target.
+target=android-8

第14章 片元着色器的妙用/Sample14_9/gen/com/bn/Sample14_9/R.java

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+/* AUTO-GENERATED FILE.  DO NOT MODIFY.
+ *
+ * This class was automatically generated by the
+ * aapt tool from the resource data it found.  It
+ * should not be modified by hand.
+ */
+
+package com.bn.Sample14_9;
+
+public final class R {
+    public static final class attr {
+    }
+    public static final class drawable {
+        public static final int icon=0x7f020000;
+    }
+    public static final class string {
+        public static final int app_name=0x7f030000;
+    }
+}

第14章 片元着色器的妙用/Sample14_9/res/values/strings.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">Sample14_9</string>
+</resources>

第14章 片元着色器的妙用/Sample14_9/src/com/bn/Sample14_9/MatrixState.java

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+package com.bn.Sample14_9;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.FloatBuffer;
+import java.util.*;
+import android.opengl.Matrix;
+
+//存储系统矩阵状态的类
+public class MatrixState 
+{
+	private static float[] mProjMatrix = new float[16];//4x4矩阵 投影用
+    private static float[] mVMatrix = new float[16];//摄像机位置朝向9参数矩阵   
+    private static float[] currMatrix;//当前变换矩阵
+    public static float[] lightLocation=new float[]{0,0,0};//定位光光源位置
+    public static FloatBuffer cameraFB;    
+    public static FloatBuffer lightPositionFB;
+    
+    public static Stack<float[]> mStack=new Stack<float[]>();//保护变换矩阵的栈
+     
+    public static void setInitStack()//获取不变换初始矩阵
+    {
+    	currMatrix=new float[16];
+    	Matrix.setRotateM(currMatrix, 0, 0, 1, 0, 0);
+    }
+    
+    public static void pushMatrix()//保护变换矩阵
+    {
+    	mStack.push(currMatrix.clone());
+    }
+    
+    public static void popMatrix()//恢复变换矩阵
+    {
+    	currMatrix=mStack.pop();
+    }
+    
+    public static void translate(float x,float y,float z)//设置沿xyz轴移动
+    {
+    	Matrix.translateM(currMatrix, 0, x, y, z);
+    }
+    
+    public static void rotate(float angle,float x,float y,float z)//设置绕xyz轴移动
+    {
+    	Matrix.rotateM(currMatrix,0,angle,x,y,z);
+    }
+    
+    public static void scale(float x,float y,float z)
+    {
+    	Matrix.scaleM(currMatrix,0, x, y, z);
+    }
+    
+    
+    //设置摄像机
+    public static void setCamera
+    (
+    		float cx,	//摄像机位置x
+    		float cy,   //摄像机位置y
+    		float cz,   //摄像机位置z
+    		float tx,   //摄像机目标点x
+    		float ty,   //摄像机目标点y
+    		float tz,   //摄像机目标点z
+    		float upx,  //摄像机UP向量X分量
+    		float upy,  //摄像机UP向量Y分量
+    		float upz   //摄像机UP向量Z分量		
+    )
+    {
+    	Matrix.setLookAtM
+        (
+        		mVMatrix, 
+        		0, 
+        		cx,
+        		cy,
+        		cz,
+        		tx,
+        		ty,
+        		tz,
+        		upx,
+        		upy,
+        		upz
+        );
+    	
+    	float[] cameraLocation=new float[3];//摄像机位置
+    	cameraLocation[0]=cx;
+    	cameraLocation[1]=cy;
+    	cameraLocation[2]=cz;
+    	
+    	ByteBuffer llbb = ByteBuffer.allocateDirect(3*4);
+        llbb.order(ByteOrder.nativeOrder());//设置字节顺序
+        cameraFB=llbb.asFloatBuffer();
+        cameraFB.put(cameraLocation);
+        cameraFB.position(0);  
+    }
+    
+    //设置透视投影参数
+    public static void setProjectFrustum
+    (
+    	float left,		//near面的left
+    	float right,    //near面的right
+    	float bottom,   //near面的bottom
+    	float top,      //near面的top
+    	float near,		//near面距离
+    	float far       //far面距离
+    )
+    {
+    	Matrix.frustumM(mProjMatrix, 0, left, right, bottom, top, near, far);    	
+    }
+    
+    //设置正交投影参数
+    public static void setProjectOrtho
+    (
+    	float left,		//near面的left
+    	float right,    //near面的right
+    	float bottom,   //near面的bottom
+    	float top,      //near面的top
+    	float near,		//near面距离
+    	float far       //far面距离
+    )
+    {    	
+    	Matrix.orthoM(mProjMatrix, 0, left, right, bottom, top, near, far);
+    }   
+   
+    //获取具体物体的总变换矩阵
+    public static float[] getFinalMatrix()
+    {
+    	float[] mMVPMatrix=new float[16];
+    	Matrix.multiplyMM(mMVPMatrix, 0, mVMatrix, 0, currMatrix, 0);
+        Matrix.multiplyMM(mMVPMatrix, 0, mProjMatrix, 0, mMVPMatrix, 0);        
+        return mMVPMatrix;
+    }
+    
+    //获取具体物体的变换矩阵
+    public static float[] getMMatrix()
+    {       
+        return currMatrix;
+    }
+    
+    //设置灯光位置的方法
+    public static void setLightLocation(float x,float y,float z)
+    {
+    	lightLocation[0]=x;
+    	lightLocation[1]=y;
+    	lightLocation[2]=z;
+    	ByteBuffer llbb = ByteBuffer.allocateDirect(3*4);
+        llbb.order(ByteOrder.nativeOrder());//设置字节顺序
+        lightPositionFB=llbb.asFloatBuffer();
+        lightPositionFB.put(lightLocation);
+        lightPositionFB.position(0);
+    }
+    //获取摄像机朝向的矩阵
+    public static float[] getCaMatrix()
+    {
+		return mVMatrix;
+    } 
+    //获取投影矩阵
+    public static float[] getProjMatrix()
+    {
+		return mProjMatrix;
+    }
+}

第14章 片元着色器的妙用/Sample14_9/src/com/bn/Sample14_9/MySurfaceView.java

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+package com.bn.Sample14_9;
+import java.io.IOException;
+import java.io.InputStream;
+import android.opengl.GLSurfaceView;
+import android.opengl.GLES20;
+import android.opengl.GLUtils;
+import javax.microedition.khronos.egl.EGLConfig;
+import javax.microedition.khronos.opengles.GL10;
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+
+class MySurfaceView extends GLSurfaceView 
+{
+    private SceneRenderer mRenderer;//场景渲染器  	
+	public MySurfaceView(Context context) {
+        super(context);
+        this.setEGLContextClientVersion(2); //设置使用OPENGL ES2.0
+        mRenderer = new SceneRenderer();	//创建场景渲染器
+        setRenderer(mRenderer);				//设置渲染器		        
+        setRenderMode(GLSurfaceView.RENDERMODE_CONTINUOUSLY);//设置渲染模式为主动渲染   
+    }
+	private class SceneRenderer implements GLSurfaceView.Renderer 
+    {
+		TextureRect pmBase;
+        public void onDrawFrame(GL10 gl) 
+        { 
+        	//清除深度缓冲与颜色缓冲
+            GLES20.glClear( GLES20.GL_DEPTH_BUFFER_BIT | GLES20.GL_COLOR_BUFFER_BIT);            
+            MatrixState.pushMatrix(); 
+            pmBase.drawSelf();//平面
+            MatrixState.popMatrix();   
+        }  
+
+        public void onSurfaceChanged(GL10 gl, int width, int height) {
+            //设置视窗大小及位置 
+        	GLES20.glViewport(0, 0, width, height); 
+        	//计算GLSurfaceView的宽高比
+            float ratio = (float) width / height;
+            //设置camera位置
+            MatrixState.setCamera
+            (
+            		0,	//人眼位置的X
+            		0, //人眼位置的Y
+            		20, //人眼位置的Z
+            		0, 	//人眼球看的点X
+            		0,  //人眼球看的点Y
+            		0,  //人眼球看的点Z
+            		0, 	//up向量
+            		1, 
+            		0
+            );
+            //调用此方法计算产生透视投影矩阵
+            MatrixState.setProjectFrustum(-ratio, ratio, -1, 1, 2, 100);
+        }
+        @Override
+        public void onSurfaceCreated(GL10 gl, EGLConfig config) {
+            //设置屏幕背景色RGBA
+            GLES20.glClearColor(1.f,1.0f,1.0f,1.0f);    
+            //打开深度检测
+            GLES20.glEnable(GLES20.GL_DEPTH_TEST);
+            //打开背面剪裁   
+            GLES20.glEnable(GLES20.GL_CULL_FACE);
+            //初始化变换矩阵
+            MatrixState.setInitStack();  
+    		pmBase = new TextureRect(MySurfaceView.this,17, 17, 1, 1);
+        }
+    }
+
+	//初始化纹理
+	public int initTexture(int drawableId)
+	{
+		//生成纹理ID
+		int[] textures = new int[1];
+		GLES20.glGenTextures
+		(
+				1,          //产生的纹理id的数量
+				textures,   //纹理id的数组
+				0           //偏移量
+		);    
+		int textureId=textures[0];    
+		GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureId);
+		//非Mipmap纹理采样过滤参数	
+		GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER,GLES20.GL_NEAREST);
+		GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D,GLES20.GL_TEXTURE_MAG_FILTER,GLES20.GL_LINEAR);
+		
+		//ST方向纹理拉伸方式
+		GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S,GLES20.GL_REPEAT);
+		GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T,GLES20.GL_REPEAT);		
+        
+        //通过输入流加载图片===============begin===================
+        InputStream is = this.getResources().openRawResource(drawableId);
+        Bitmap bitmapTmp;
+        try 
+        {
+        	bitmapTmp = BitmapFactory.decodeStream(is);        	
+        }
+        finally 
+        {
+            try 
+            {
+                is.close();
+            } 
+            catch(IOException e) 
+            {
+                e.printStackTrace();
+            }
+        } 
+        //实际加载纹理,换成这个方法后，如果图片格式有问题，会抛出图片格式异常，不再会误显示其他异常
+	   	GLUtils.texImage2D
+	    (
+	    		GLES20.GL_TEXTURE_2D, //纹理类型
+	     		0, 
+	     		GLUtils.getInternalFormat(bitmapTmp), 
+	     		bitmapTmp, //纹理图像
+	     		GLUtils.getType(bitmapTmp), 
+	     		0 //纹理边框尺寸
+	     );   
+        //自动生成Mipmap纹理
+        GLES20.glGenerateMipmap(GLES20.GL_TEXTURE_2D);
+        //释放纹理图
+        bitmapTmp.recycle();
+        //返回纹理ID
+        return textureId;
+	}	
+}

第14章 片元着色器的妙用/Sample14_9/src/com/bn/Sample14_9/Sample14_9_Activity.java

@@ -0,0 +1,39 @@
+package com.bn.Sample14_9;
+import android.app.Activity;
+import android.content.pm.ActivityInfo;
+import android.os.Bundle;
+import android.view.Window;
+import android.view.WindowManager;
+ 
+public class Sample14_9_Activity extends Activity {
+	private MySurfaceView mGLSurfaceView;
+    @Override
+    protected void onCreate(Bundle savedInstanceState) 
+    {
+        super.onCreate(savedInstanceState);         
+        //设置为全屏
+        requestWindowFeature(Window.FEATURE_NO_TITLE); 
+		getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN ,  
+		              WindowManager.LayoutParams.FLAG_FULLSCREEN);
+		//设置为横屏模式
+		setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
+			
+		//初始化GLSurfaceView
+        mGLSurfaceView = new MySurfaceView(this);
+        setContentView(mGLSurfaceView);	
+        mGLSurfaceView.requestFocus();//获取焦点
+        mGLSurfaceView.setFocusableInTouchMode(true);//设置为可触控  
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        mGLSurfaceView.onResume();
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        mGLSurfaceView.onPause();
+    }    
+}

第14章 片元着色器的妙用/Sample14_9/src/com/bn/Sample14_9/ShaderUtil.java

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+package com.bn.Sample14_9;
+
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+
+import android.content.res.Resources;
+import android.opengl.GLES20;
+import android.util.Log;
+
+//加载顶点Shader与片元Shader的工具类
+public class ShaderUtil 
+{
+   //加载制定shader的方法
+   public static int loadShader
+   (
+		 int shaderType, //shader的类型  GLES20.GL_VERTEX_SHADER   GLES20.GL_FRAGMENT_SHADER
+		 String source   //shader的脚本字符串
+   ) 
+   {
+	    //创建一个新shader
+        int shader = GLES20.glCreateShader(shaderType);
+        //若创建成功则加载shader
+        if (shader != 0) 
+        {
+        	//加载shader的源代码
+            GLES20.glShaderSource(shader, source);
+            //编译shader
+            GLES20.glCompileShader(shader);
+            //存放编译成功shader数量的数组
+            int[] compiled = new int[1];
+            //获取Shader的编译情况
+            GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0);
+            if (compiled[0] == 0) 
+            {//若编译失败则显示错误日志并删除此shader
+                Log.e("ES20_ERROR", "Could not compile shader " + shaderType + ":");
+                Log.e("ES20_ERROR", GLES20.glGetShaderInfoLog(shader));
+                GLES20.glDeleteShader(shader);
+                shader = 0;      
+            }  
+        }
+        return shader;
+    }
+    
+   //创建shader程序的方法
+   public static int createProgram(String vertexSource, String fragmentSource) 
+   {
+	    //加载顶点着色器
+        int vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, vertexSource);
+        if (vertexShader == 0) 
+        {
+            return 0;
+        }
+        
+        //加载片元着色器
+        int pixelShader = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentSource);
+        if (pixelShader == 0) 
+        {
+            return 0;
+        }
+
+        //创建程序
+        int program = GLES20.glCreateProgram();
+        //若程序创建成功则向程序中加入顶点着色器与片元着色器
+        if (program != 0) 
+        {
+        	//向程序中加入顶点着色器
+            GLES20.glAttachShader(program, vertexShader);
+            checkGlError("glAttachShader");
+            //向程序中加入片元着色器
+            GLES20.glAttachShader(program, pixelShader);
+            checkGlError("glAttachShader");
+            //链接程序
+            GLES20.glLinkProgram(program);
+            //存放链接成功program数量的数组
+            int[] linkStatus = new int[1];
+            //获取program的链接情况
+            GLES20.glGetProgramiv(program, GLES20.GL_LINK_STATUS, linkStatus, 0);
+            //若链接失败则报错并删除程序
+            if (linkStatus[0] != GLES20.GL_TRUE) 
+            {
+                Log.e("ES20_ERROR", "Could not link program: ");
+                Log.e("ES20_ERROR", GLES20.glGetProgramInfoLog(program));
+                GLES20.glDeleteProgram(program);
+                program = 0;
+            }
+        }
+        return program;
+    }
+    
+   //检查每一步操作是否有错误的方法 
+   public static void checkGlError(String op) 
+   {
+        int error;
+        while ((error = GLES20.glGetError()) != GLES20.GL_NO_ERROR) 
+        {
+            Log.e("ES20_ERROR", op + ": glError " + error);
+            throw new RuntimeException(op + ": glError " + error);
+        }
+   }
+   
+   //从sh脚本中加载shader内容的方法
+   public static String loadFromAssetsFile(String fname,Resources r)
+   {
+   	String result=null;    	
+   	try
+   	{
+   		InputStream in=r.getAssets().open(fname);
+			int ch=0;
+		    ByteArrayOutputStream baos = new ByteArrayOutputStream();
+		    while((ch=in.read())!=-1)
+		    {
+		      	baos.write(ch);
+		    }      
+		    byte[] buff=baos.toByteArray();
+		    baos.close();
+		    in.close();
+   		result=new String(buff,"UTF-8"); 
+   		result=result.replaceAll("\\r\\n","\n");
+   	}
+   	catch(Exception e)
+   	{
+   		e.printStackTrace();
+   	}    	
+   	return result;
+   }
+}

第14章 片元着色器的妙用/Sample14_9/src/com/bn/Sample14_9/TextureRect.java

@@ -0,0 +1,129 @@
+package com.bn.Sample14_9;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.FloatBuffer;
+import android.opengl.GLES20;
+public class TextureRect 
+{
+	int mProgram;//自定义渲染管线着色器程序id
+    int muMVPMatrixHandle;//总变换矩阵引用
+    int maPositionHandle; //顶点位置属性引用   
+    int maTexCoorHandle; //顶点纹理坐标属性引用
+    
+    String mVertexShader;//顶点着色器    	 
+    String mFragmentShader;//片元着色器
+	
+    private FloatBuffer   mVertexBuffer;//顶点坐标数据缓冲
+	FloatBuffer   mTexCoorBuffer;//顶点纹理坐标数据缓冲 
+    int vCount;//顶点数量
+    
+    float width;
+    float height;
+    
+    float sEnd;//按钮右下角的s、t值
+    float tEnd;
+	public TextureRect(MySurfaceView mv, 
+			float width,float height,	//矩形的宽高
+			float sEnd, float tEnd //右下角的s、t值
+			)
+	{
+
+		this.width=width;
+    	this.height=height;
+    	this.sEnd = sEnd;
+    	this.tEnd = tEnd;
+		initVertexData();
+        initShader(mv);
+        
+	}
+    //初始化顶点坐标与着色数据的方法
+    public void initVertexData()
+    {
+    	//顶点坐标数据的初始化================begin============================
+        vCount=6;//每个格子两个三角形，每个三角形3个顶点        
+        float vertices[]=
+        {
+            	-width/2.0f, height/2.0f, 0,
+            	-width/2.0f, -height/2.0f, 0,
+            	width/2.0f, height/2.0f, 0,
+            	
+            	-width/2.0f, -height/2.0f, 0,
+            	width/2.0f, -height/2.0f, 0,
+            	width/2.0f, height/2.0f, 0,
+        };
+        //创建顶点坐标数据缓冲
+        //vertices.length*4是因为一个整数四个字节
+        ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length*4);
+        vbb.order(ByteOrder.nativeOrder());//设置字节顺序
+        mVertexBuffer = vbb.asFloatBuffer();//转换为int型缓冲
+        mVertexBuffer.put(vertices);//向缓冲区中放入顶点坐标数据
+        mVertexBuffer.position(0);//设置缓冲区起始位置
+        
+      //顶点纹理坐标数据的初始化================begin============================
+        float texCoor[]=new float[]//纹理坐标
+        {
+        		0,0, 0,tEnd, sEnd,0,
+        		0,tEnd, sEnd,tEnd, sEnd,0        		
+        };        
+        //创建顶点纹理坐标数据缓冲
+        ByteBuffer cbb = ByteBuffer.allocateDirect(texCoor.length*4);
+        cbb.order(ByteOrder.nativeOrder());//设置字节顺序
+        mTexCoorBuffer = cbb.asFloatBuffer();//转换为Float型缓冲
+        mTexCoorBuffer.put(texCoor);//向缓冲区中放入顶点着色数据
+        mTexCoorBuffer.position(0);//设置缓冲区起始位置
+        //特别提示：由于不同平台字节顺序不同数据单元不是字节的一定要经过ByteBuffer
+        //转换，关键是要通过ByteOrder设置nativeOrder()，否则有可能会出问题
+        //顶点纹理坐标数据的初始化================end============================
+    }
+    public void initShader(MySurfaceView mv)
+    {
+    	//加载顶点着色器的脚本内容
+        mVertexShader=ShaderUtil.loadFromAssetsFile("vertex_tex.sh", mv.getResources());
+        //加载片元着色器的脚本内容
+        mFragmentShader=ShaderUtil.loadFromAssetsFile("frag_tex.sh", mv.getResources());  
+        //基于顶点着色器与片元着色器创建程序
+        mProgram = ShaderUtil.createProgram(mVertexShader, mFragmentShader);
+        //获取程序中顶点位置属性引用 
+        maPositionHandle = GLES20.glGetAttribLocation(mProgram, "aPosition"); 
+        //获取程序中总变换矩阵id
+        muMVPMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uMVPMatrix");  
+        //获取程序中顶点纹理坐标属性引用
+        maTexCoorHandle= GLES20.glGetAttribLocation(mProgram, "aTexCoor");
+    }
+	public void drawSelf()
+	{
+		 //制定使用某套着色器程序
+   	 	GLES20.glUseProgram(mProgram);
+        //将最终变换矩阵传入着色器程序
+        GLES20.glUniformMatrix4fv(muMVPMatrixHandle, 1, false, MatrixState.getFinalMatrix(), 0);
+
+		// 将顶点纹理坐标数据传入渲染管线
+		GLES20.glVertexAttribPointer
+		(
+				maTexCoorHandle, 
+				2, 
+				GLES20.GL_FLOAT,
+				false, 
+				2 * 4, 
+				mTexCoorBuffer
+		);
+		// 启用顶点位置数据
+		GLES20.glEnableVertexAttribArray(maPositionHandle);
+		GLES20.glEnableVertexAttribArray(maTexCoorHandle);
+		
+        //将顶点法向量数据传入渲染管线
+        GLES20.glVertexAttribPointer  
+        (
+        		maPositionHandle,   
+        		3, 
+        		GLES20.GL_FLOAT, 
+        		false,
+               3*4,   
+               mVertexBuffer
+        );          
+        //绘制矩形
+        GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, vCount); 
+	}
+	
+}