初次提交

第5章 投影及各种变换/Sample5_1/.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5章 投影及各种变换/Sample5_1/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Sample5_1</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5章 投影及各种变换/Sample5_1/.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5章 投影及各种变换/Sample5_1/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.Sample5_1">
+    <application android:icon="@drawable/icon" android:label="@string/app_name">
+        <activity android:name="com.bn.Sample5_1.Sample5_1_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5章 投影及各种变换/Sample5_1/assets/frag.sh

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+precision mediump float;
+varying  vec4 aaColor; //接收从顶点着色器过来的参数
+void main()                         
+{                       
+   gl_FragColor = aaColor;//给此片元颜色值
+}              

第5章 投影及各种变换/Sample5_1/assets/vertex.sh

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+uniform mat4 uMVPMatrix; //总变换矩阵
+attribute vec3 aPosition;  //顶点位置
+attribute vec4 aColor;    //顶点颜色
+varying  vec4 aaColor;  //用于传递给片元着色器的变量
+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
+   aaColor = aColor;//将接收的颜色传递给片元着色器
+}                      

第5章 投影及各种变换/Sample5_1/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5章 投影及各种变换/Sample5_1/gen/com/bn/Sample5_1/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.Sample5_1;
+
+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5章 投影及各种变换/Sample5_1/res/values/strings.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">Sample5_1</string>
+</resources>

第5章 投影及各种变换/Sample5_1/src/com/bn/Sample5_1/MatrixState.java

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+package com.bn.Sample5_1;
+
+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[] mMVPMatrix;//最后起作用的总变换矩阵
+    
+    //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
+        );
+    }
+    
+    //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[] spec)
+    {
+    	mMVPMatrix=new float[16];
+    	Matrix.multiplyMM(mMVPMatrix, 0, mVMatrix, 0, spec, 0);
+        Matrix.multiplyMM(mMVPMatrix, 0, mProjMatrix, 0, mMVPMatrix, 0);        
+        return mMVPMatrix;
+    }
+}

第5章 投影及各种变换/Sample5_1/src/com/bn/Sample5_1/MySurfaceView.java

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+package com.bn.Sample5_1;
+import android.opengl.GLSurfaceView;
+import android.view.MotionEvent;
+import android.opengl.GLES20;
+import javax.microedition.khronos.egl.EGLConfig;
+import javax.microedition.khronos.opengles.GL10;
+import android.content.Context;
+
+class MySurfaceView extends GLSurfaceView 
+{
+	private final float TOUCH_SCALE_FACTOR = 180.0f/320;//角度缩放比例
+    private SceneRenderer mRenderer;//场景渲染器
+	 
+	private float mPreviousY;//上次的触控位置Y坐标
+    private float mPreviousX;//上次的触控位置X坐标
+	
+	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   
+    }
+	
+	//触摸事件回调方法
+    @Override 
+    public boolean onTouchEvent(MotionEvent e) {
+        float y = e.getY();
+        float x = e.getX();
+        switch (e.getAction()) {
+        case MotionEvent.ACTION_MOVE:
+            float dy = y - mPreviousY;//计算触控笔Y位移
+            float dx = x - mPreviousX;//计算触控笔X位移            
+            for(SixPointedStar h:mRenderer.ha)
+            {
+            	h.yAngle += dx * TOUCH_SCALE_FACTOR;//设置六角星数组中的各个六角星绕y轴旋转角度
+                h.xAngle+= dy * TOUCH_SCALE_FACTOR;//设置六角星数组中的各个六角星绕x轴旋转角度
+            }
+        }
+        mPreviousY = y;//记录触控笔位置
+        mPreviousX = x;//记录触控笔位置
+        return true;
+    }
+
+	private class SceneRenderer implements GLSurfaceView.Renderer 
+    {   
+    	SixPointedStar[] ha=new SixPointedStar[6];//六角星数组
+    	
+        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);
+            //绘制六角星数组中的各个六角星
+            for(SixPointedStar h:ha)
+            {
+            	h.drawSelf();
+            }
+        }  
+
+        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;
+            //设置平行投影
+        	MatrixState.setProjectOrtho(-ratio, ratio, -1, 1, 1, 10); 
+        	
+            //调用此方法产生摄像机9参数位置矩阵
+			MatrixState.setCamera(
+					0, 0, 3f, 
+					0, 0, 0f, 
+					0f, 1.0f, 0.0f
+					);
+        }
+
+        public void onSurfaceCreated(GL10 gl, EGLConfig config) {
+            //设置屏幕背景色RGBA
+            GLES20.glClearColor(0.5f,0.5f,0.5f, 1.0f);  
+            //创建六角星数组中的各个对象 
+            for(int i=0;i<ha.length;i++)
+            {
+            	ha[i]=new SixPointedStar(MySurfaceView.this,0.2f,0.5f,-0.3f*i);   
+            }            
+            //打开深度检测
+            GLES20.glEnable(GLES20.GL_DEPTH_TEST);
+        }
+    }
+}

第5章 投影及各种变换/Sample5_1/src/com/bn/Sample5_1/Sample5_1_Activity.java

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+package com.bn.Sample5_1;
+import android.app.Activity;
+import android.content.pm.ActivityInfo;
+import android.os.Bundle;
+import android.view.Window;
+import android.view.WindowManager;
+
+public class Sample5_1_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_PORTRAIT);
+		
+		//初始化GLSurfaceView
+        mGLSurfaceView = new MySurfaceView(this);
+        
+		//切换到主界面
+		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5章 投影及各种变换/Sample5_1/src/com/bn/Sample5_1/ShaderUtil.java

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+package com.bn.Sample5_1;
+
+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5章 投影及各种变换/Sample5_1/src/com/bn/Sample5_1/SixPointedStar.java

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+package com.bn.Sample5_1;
+import static com.bn.Sample5_1.ShaderUtil.createProgram;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.FloatBuffer;
+import java.util.ArrayList;
+import java.util.List;
+
+import android.opengl.GLES20;
+import android.opengl.Matrix;
+
+//六角星
+public class SixPointedStar 
+{	
+	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 maColorHandle; //顶点颜色属性引用  
+    String mVertexShader;	//顶点着色器代码脚本 
+    String mFragmentShader;	//片元着色器代码脚本
+    static float[] mMMatrix = new float[16];	//具体物体的3D变换矩阵，包括旋转、平移、缩放
+	
+	FloatBuffer   mVertexBuffer;//顶点坐标数据缓冲
+	FloatBuffer   mColorBuffer;//顶点着色数据缓冲
+    int vCount=0;    
+    float yAngle=0;//绕y轴旋转的角度
+    float xAngle=0;//绕z轴旋转的角度
+    final float UNIT_SIZE=1;
+    
+    public SixPointedStar(MySurfaceView mv,float r,float R,float z)
+    {    	
+    	//调用初始化顶点数据的initVertexData方法
+    	initVertexData(R,r,z);
+    	//调用初始化着色器的intShader方法     
+    	initShader(mv);
+    }
+    
+    //自定义初始化顶点数据的initVertexData方法
+    public void initVertexData(float R,float r,float z)
+    {
+		List<Float> flist=new ArrayList<Float>();
+		float tempAngle=360/6;
+		for(float angle=0;angle<360;angle+=tempAngle)
+		{
+			//第一个三角形
+			//第一个中心点
+			flist.add(0f);
+			flist.add(0f);
+			flist.add(z);
+			//第二个点
+			flist.add((float) (R*UNIT_SIZE*Math.cos(Math.toRadians(angle))));
+			flist.add((float) (R*UNIT_SIZE*Math.sin(Math.toRadians(angle))));
+			flist.add(z);
+			//第三个点
+			flist.add((float) (r*UNIT_SIZE*Math.cos(Math.toRadians(angle+tempAngle/2))));
+			flist.add((float) (r*UNIT_SIZE*Math.sin(Math.toRadians(angle+tempAngle/2))));
+			flist.add(z);
+			
+			//第二个三角形
+			//第一个中心点
+			flist.add(0f);
+			flist.add(0f);
+			flist.add(z);
+			//第二个点
+			flist.add((float) (r*UNIT_SIZE*Math.cos(Math.toRadians(angle+tempAngle/2))));
+			flist.add((float) (r*UNIT_SIZE*Math.sin(Math.toRadians(angle+tempAngle/2))));
+			flist.add(z);
+			//第三个点
+			flist.add((float) (R*UNIT_SIZE*Math.cos(Math.toRadians(angle+tempAngle))));
+			flist.add((float) (R*UNIT_SIZE*Math.sin(Math.toRadians(angle+tempAngle))));
+			flist.add(z);
+		}
+		vCount=flist.size()/3;
+		float[] vertexArray=new float[flist.size()];
+		for(int i=0;i<vCount;i++)
+		{
+			vertexArray[i*3]=flist.get(i*3);
+			vertexArray[i*3+1]=flist.get(i*3+1);
+			vertexArray[i*3+2]=flist.get(i*3+2);
+		}
+		ByteBuffer vbb=ByteBuffer.allocateDirect(vertexArray.length*4);
+		vbb.order(ByteOrder.nativeOrder());	//设置字节顺序为本地操作系统顺序
+		mVertexBuffer=vbb.asFloatBuffer();
+		mVertexBuffer.put(vertexArray);
+		mVertexBuffer.position(0);
+		
+		
+		
+        
+        //顶点着色数据的初始化================begin============================
+		float[] colorArray=new float[vCount*4];
+		for(int i=0;i<vCount;i++)
+		{
+			if(i%3==0){//中心点为白色
+				colorArray[i*4]=1;
+				colorArray[i*4+1]=1;
+				colorArray[i*4+2]=1;
+				colorArray[i*4+3]=0;
+			}
+			else{//边上的点为淡蓝色
+				colorArray[i*4]=0.45f;
+				colorArray[i*4+1]=0.75f;
+				colorArray[i*4+2]=0.75f;
+				colorArray[i*4+3]=0;
+			}
+		}
+		ByteBuffer cbb=ByteBuffer.allocateDirect(colorArray.length*4);
+		cbb.order(ByteOrder.nativeOrder());	//设置字节顺序为本地操作系统顺序
+		mColorBuffer=cbb.asFloatBuffer();
+		mColorBuffer.put(colorArray);
+		mColorBuffer.position(0);
+        //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
+        //顶点着色数据的初始化================end============================
+
+    }
+
+    //自定义初始化着色器的intShader方法
+    public void initShader(MySurfaceView mv)
+    {
+    	//加载顶点着色器的脚本内容
+        mVertexShader=ShaderUtil.loadFromAssetsFile("vertex.sh", mv.getResources());
+        //加载片元着色器的脚本内容
+        mFragmentShader=ShaderUtil.loadFromAssetsFile("frag.sh", mv.getResources());  
+        //基于顶点着色器与片元着色器创建程序
+        mProgram = createProgram(mVertexShader, mFragmentShader);
+        //获取程序中顶点位置属性引用id  
+        maPositionHandle = GLES20.glGetAttribLocation(mProgram, "aPosition");
+        //获取程序中顶点颜色属性引用id  
+        maColorHandle= GLES20.glGetAttribLocation(mProgram, "aColor");
+        //获取程序中总变换矩阵引用id
+        muMVPMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uMVPMatrix");  
+    }
+    
+    public void drawSelf()
+    {        
+    	 //制定使用某套shader程序
+    	 GLES20.glUseProgram(mProgram);        
+    	 //初始化变换矩阵
+         Matrix.setRotateM(mMMatrix,0,0,0,1,0);
+         //设置沿Z轴正向位移1
+         Matrix.translateM(mMMatrix,0,0,0,1);
+         //设置绕y轴旋转
+         Matrix.rotateM(mMMatrix,0,yAngle,0,1,0);
+         //设置绕z轴旋转
+         Matrix.rotateM(mMMatrix,0,xAngle,1,0,0);  
+         //将最终变换矩阵传入shader程序
+         GLES20.glUniformMatrix4fv(muMVPMatrixHandle, 1, false, MatrixState.getFinalMatrix(mMMatrix), 0); 
+         //为画笔指定顶点位置数据
+         GLES20.glVertexAttribPointer  
+         (
+         		maPositionHandle,   
+         		3, 
+         		GLES20.GL_FLOAT, 
+         		false,
+                3*4, 
+                mVertexBuffer
+         );       
+         //为画笔指定顶点着色数据
+         GLES20.glVertexAttribPointer  
+         (
+        		maColorHandle, 
+         		4, 
+         		GLES20.GL_FLOAT, 
+         		false,
+                4*4,   
+                mColorBuffer
+         );   
+         //允许顶点位置数据数组
+         GLES20.glEnableVertexAttribArray(maPositionHandle);  
+         GLES20.glEnableVertexAttribArray(maColorHandle);  
+         //绘制六角星
+         GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, vCount); 
+    }
+}