展会信息港展会大全
当前位置： 人工智能实验室> 安卓Android开发 > Android OpenGL ES 纹理映射之glDrawElements

Android OpenGL ES 纹理映射之glDrawElements
来源：互联网   发布日期：2016-01-19 12:13:45   浏览：3061次  

导读：目标: 为四方体的每个面贴上一张图片，并自动旋转。 一、基础知识: 要实现每个面上贴一张图片，首先需要创建一个纹理，并使用图片来生成一个纹理。 ============================================== ...

目标: 为四方体的每个面贴上一张图片，并自动旋转。

一、基础知识:

要实现每个面上贴一张图片，首先需要创建一个纹理，并使用图片来生成一个纹理。

==========================================================================

1.初始化:

IntBuffer intBuffer = IntBuffer.allocate(2);

// 1.允许2D贴图,纹理

gl.glEnable(GL10.GL_TEXTURE_2D);

// 2.创建纹理

gl.glGenTextures(2, intBuffer);

texture = intBuffer.get(0);

// 3.设置要使用的纹理

gl.glBindTexture(GL10.GL_TEXTURE_2D, texture);

// 4.生成纹理

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.close_Bitmap, 0);

// 5.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);

==========================================================================

2.使用:

// 1.清除屏幕和深度缓存

gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);

// 2.重置当前的模型观察矩阵

gl.glLoadIdentity();

// 3.移动到指定的位置

gl.glTranslatef(0.0f, 0.0f, -5.0f);

// 4.设置3个方向的旋转

gl.glRotatef(xrot, 1.0f, 0.0f, 0.0f);

gl.glRotatef(yrot, 0.0f, 1.0f, 0.0f);

gl.glRotatef(zrot, 0.0f, 0.0f, 1.0f);

texture = intBuffer.get(1);;

// 5.绑定纹理

gl.glBindTexture(GL10.GL_TEXTURE_2D, texture);

// 6.开启顶点和纹理功能

gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);

gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);

// 7.纹理和四边形对应的顶点

gl.glVertexPointer(3, GL10.GL_FIXED, 0, vertices);

gl.glTexCoordPointer(2, GL10.GL_FIXED, 0, texCoords);

// 8.绘制0

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.iBitmap, 0);

gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, 4, GL10.GL_UNSIGNED_BYTE, indices_0);

// 9.关闭顶点和纹理功能

gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);

gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);

==========================================================================

二、实现:

1. 界面编辑：

【reslayoutmain.xml】

[html]

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/hello"

/>

android:id="@+id/button1"

android:layout_width="145dp"

android:layout_height="wrap_content"

android:text="演示开始" />

2.代码编辑:

【srccomyarinandroidExamplesActivity01.java】

[java]

package com.yarin.android.Examples_12_05;

import java.io.IOException;

import java.io.InputStream;

import javax.microedition.khronos.opengles.GL10;

import android.app.Activity;

import android.content.res.Resources;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLSurfaceView;

import android.opengl.GLUtils;

import android.opengl.GLSurfaceView.Renderer;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

public class Activity01 extends Activity

{

Renderer render = new GLRender();

GLSurfaceView glView;

Button start; // 演示开始

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

GLImage.load(this.getResources());

glView = new GLSurfaceView(this);

glView.setRenderer(render);

setContentView(R.layout.main);

start=(Button)findViewById(R.id.button1); // "演示开始"按钮初始化

start.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

setContentView(glView);

}

});

//setContentView(glView);

}

}

class GLImage

{

public static Bitmap iBitmap;

public static Bitmap jBitmap;

public static Bitmap kBitmap;

public static Bitmap lBitmap;

public static Bitmap mBitmap;

public static Bitmap nBitmap;

public static Bitmap close_Bitmap;

public static void load(Resources resources)

{

iBitmap = BitmapFactory.decodeResource(resources, R.drawable.img);

jBitmap = BitmapFactory.decodeResource(resources, R.drawable.jmg);

kBitmap = BitmapFactory.decodeResource(resources, R.drawable.kmg);

lBitmap = BitmapFactory.decodeResource(resources, R.drawable.lmg);

mBitmap = BitmapFactory.decodeResource(resources, R.drawable.mmg);

nBitmap = BitmapFactory.decodeResource(resources, R.drawable.nmg);

close_Bitmap = BitmapFactory.decodeResource(resources, R.drawable.close);

}

}

【srccomyarinandroidExamplesGLRender.java】

package com.yarin.android.Examples_12_05;

import java.io.IOException;

import java.io.InputStream;

import java.nio.ByteBuffer;

import java.nio.IntBuffer;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLUtils;

import android.opengl.GLSurfaceView.Renderer;

public class GLRender implements Renderer

{

float xrot, yrot, zrot;

int texture = -1;

int one = 0x10000;

IntBuffer intBuffer = IntBuffer.allocate(2);

int n_view_start_x=100;

int n_view_start_y=20;

int n_close_flag=0; // 1: close_icon show. 0: close_icon hide.

public int textureId;

IntBuffer vertices = IntBuffer.wrap(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 texCoords = IntBuffer.wrap(new int[]{

one,0,0,0,0,one,one,one,

0,0,0,one,one,one,one,0,

one,one,one,0,0,0,0,one,

0,one,one,one,one,0,0,0,

0,0,0,one,one,one,one,0,

one,0,0,0,0,one,one,one,

});

ByteBuffer indices = ByteBuffer.wrap(new byte[]{

0,1,3,2,

4,5,7,6,

8,9,11,10,

12,13,15,14,

16,17,19,18,

20,21,23,22,

});

ByteBuffer indices_0 = ByteBuffer.wrap(new byte[]{

0,1,3,2

});

ByteBuffer indices_1 = ByteBuffer.wrap(new byte[]{

4,5,7,6

});

ByteBuffer indices_2 = ByteBuffer.wrap(new byte[]{

8,9,11,10

});

ByteBuffer indices_3 = ByteBuffer.wrap(new byte[]{

12,13,15,14

});

ByteBuffer indices_4 = ByteBuffer.wrap(new byte[]{

16,17,19,18

});

ByteBuffer indices_5 = ByteBuffer.wrap(new byte[]{

20,21,23,22

});

//正方形的4个顶点

private IntBuffer quaterBuffer = IntBuffer.wrap(new int[]{

one,one,0,

-one,one,0,

one,-one,0,

-one,-one,0});

IntBuffer texCoords_rect = IntBuffer.wrap(new int[]{

0,1,1,1,1,0,0,0,

});

@Override

public void onDrawFrame(GL10 gl)

{

// 1.清除屏幕和深度缓存

gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);

// 2.重置当前的模型观察矩阵

gl.glLoadIdentity();

// 3.移动到指定的位置

gl.glTranslatef(0.0f, 0.0f, -5.0f);

// 4.设置3个方向的旋转

gl.glRotatef(xrot, 1.0f, 0.0f, 0.0f);

gl.glRotatef(yrot, 0.0f, 1.0f, 0.0f);

gl.glRotatef(zrot, 0.0f, 0.0f, 1.0f);

texture = intBuffer.get(1);;

// 5.绑定纹理

gl.glBindTexture(GL10.GL_TEXTURE_2D, texture);

// 6.开启顶点和纹理功能

gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);

gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);

// 7.纹理和四边形对应的顶点

gl.glVertexPointer(3, GL10.GL_FIXED, 0, vertices);

gl.glTexCoordPointer(2, GL10.GL_FIXED, 0, texCoords);

// 8.绘制0

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.iBitmap, 0);

gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, 4, GL10.GL_UNSIGNED_BYTE, indices_0);

//绘制1

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.jBitmap, 0);

gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, 4, GL10.GL_UNSIGNED_BYTE, indices_1);

//绘制2

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.kBitmap, 0);

gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, 4, GL10.GL_UNSIGNED_BYTE, indices_2);

//绘制3

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.lBitmap, 0);

gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, 4, GL10.GL_UNSIGNED_BYTE, indices_3);

//绘制4

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.mBitmap, 0);

gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, 4, GL10.GL_UNSIGNED_BYTE, indices_4);

//绘制5

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.close_Bitmap, 0);

gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, 4, GL10.GL_UNSIGNED_BYTE, indices_5);

if(0==n_close_flag)

{

// 重置当前的模型观察矩阵

gl.glLoadIdentity();

// 左移 1.5 单位，并移入屏幕 5.0

gl.glTranslatef(-4.5f, 3.0f, -5.0f);

gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);

gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);

texture = intBuffer.get(0);

// 绑定纹理

gl.glBindTexture(GL10.GL_TEXTURE_2D, texture);

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.close_Bitmap, 0);

// 绘制关闭按钮

// 设置和绘制正方形

gl.glVertexPointer(3, GL10.GL_FIXED, 0, quaterBuffer);

gl.glTexCoordPointer(2, GL10.GL_FIXED, 0, texCoords_rect);

gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4);

//gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, 4, GL10.GL_UNSIGNED_BYTE, indices_5);

n_close_flag=1;

}

// 9.关闭顶点和纹理功能

gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);

gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);

xrot+=0.5f;

yrot+=0.6f;

zrot+=0.3f;

}

@Override

public void onSurfaceChanged(GL10 gl, int width, int height)

{

float ratio = (float) (width-n_view_start_x) / (height-n_view_start_x);

//设置OpenGL场景的大小

//gl.glViewport(0, 0, width, height);

gl.glViewport(n_view_start_x, n_view_start_y, width-n_view_start_x, height-n_view_start_y);

//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)

{

// 绿色背景

gl.glClearColor(0, 1, 0, 0);

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);

/*

// 1.允许2D贴图,纹理

gl.glEnable(GL10.GL_TEXTURE_2D);

IntBuffer intBuffer = IntBuffer.allocate(1);

// 2.创建纹理

gl.glGenTextures(1, intBuffer);

texture = intBuffer.get();

// 3.设置要使用的纹理

gl.glBindTexture(GL10.GL_TEXTURE_2D, texture);

// 4.生成纹理

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.mBitmap, 0);

// 5.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);

*/

// 1.允许2D贴图,纹理

gl.glEnable(GL10.GL_TEXTURE_2D);

// 2.创建纹理

gl.glGenTextures(2, intBuffer);

texture = intBuffer.get(0);

// 3.设置要使用的纹理

gl.glBindTexture(GL10.GL_TEXTURE_2D, texture);

// 4.生成纹理

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.close_Bitmap, 0);

texture = intBuffer.get(1);

// 3.设置要使用的纹理

gl.glBindTexture(GL10.GL_TEXTURE_2D, texture);

// 4.生成纹理

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.nBitmap, 0);

// 5.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);

}

}

package com.yarin.android.Examples_12_05;

import java.io.IOException;

import java.io.InputStream;

import javax.microedition.khronos.opengles.GL10;

import android.app.Activity;

import android.content.res.Resources;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLSurfaceView;

import android.opengl.GLUtils;

import android.opengl.GLSurfaceView.Renderer;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

public class Activity01 extends Activity

{

Renderer render = new GLRender();

GLSurfaceView glView;

Button start; // 演示开始

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

GLImage.load(this.getResources());

glView = new GLSurfaceView(this);

glView.setRenderer(render);

setContentView(R.layout.main);

start=(Button)findViewById(R.id.button1); // "演示开始"按钮初始化

start.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

setContentView(glView);

}

});

//setContentView(glView);

}

}

class GLImage

{

public static Bitmap iBitmap;

public static Bitmap jBitmap;

public static Bitmap kBitmap;

public static Bitmap lBitmap;

public static Bitmap mBitmap;

public static Bitmap nBitmap;

public static Bitmap close_Bitmap;

public static void load(Resources resources)

{

iBitmap = BitmapFactory.decodeResource(resources, R.drawable.img);

jBitmap = BitmapFactory.decodeResource(resources, R.drawable.jmg);

kBitmap = BitmapFactory.decodeResource(resources, R.drawable.kmg);

lBitmap = BitmapFactory.decodeResource(resources, R.drawable.lmg);

mBitmap = BitmapFactory.decodeResource(resources, R.drawable.mmg);

nBitmap = BitmapFactory.decodeResource(resources, R.drawable.nmg);

close_Bitmap = BitmapFactory.decodeResource(resources, R.drawable.close);

}

}

【srccomyarinandroidExamplesGLRender.java】

package com.yarin.android.Examples_12_05;

import java.io.IOException;

import java.io.InputStream;

import java.nio.ByteBuffer;

import java.nio.IntBuffer;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLUtils;

import android.opengl.GLSurfaceView.Renderer;

public class GLRender implements Renderer

{

float xrot, yrot, zrot;

int texture = -1;

int one = 0x10000;

IntBuffer intBuffer = IntBuffer.allocate(2);

int n_view_start_x=100;

int n_view_start_y=20;

int n_close_flag=0; // 1: close_icon show. 0: close_icon hide.

public int textureId;

IntBuffer vertices = IntBuffer.wrap(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 texCoords = IntBuffer.wrap(new int[]{

one,0,0,0,0,one,one,one,

0,0,0,one,one,one,one,0,

one,one,one,0,0,0,0,one,

0,one,one,one,one,0,0,0,

0,0,0,one,one,one,one,0,

one,0,0,0,0,one,one,one,

});

ByteBuffer indices = ByteBuffer.wrap(new byte[]{

0,1,3,2,

4,5,7,6,

8,9,11,10,

12,13,15,14,

16,17,19,18,

20,21,23,22,

});

ByteBuffer indices_0 = ByteBuffer.wrap(new byte[]{

0,1,3,2

});

ByteBuffer indices_1 = ByteBuffer.wrap(new byte[]{

4,5,7,6

});

ByteBuffer indices_2 = ByteBuffer.wrap(new byte[]{

8,9,11,10

});

ByteBuffer indices_3 = ByteBuffer.wrap(new byte[]{

12,13,15,14

});

ByteBuffer indices_4 = ByteBuffer.wrap(new byte[]{

16,17,19,18

});

ByteBuffer indices_5 = ByteBuffer.wrap(new byte[]{

20,21,23,22

});

//正方形的4个顶点

private IntBuffer quaterBuffer = IntBuffer.wrap(new int[]{

one,one,0,

-one,one,0,

one,-one,0,

-one,-one,0});

IntBuffer texCoords_rect = IntBuffer.wrap(new int[]{

0,1,1,1,1,0,0,0,

});

@Override

public void onDrawFrame(GL10 gl)

{

// 1.清除屏幕和深度缓存

gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);

// 2.重置当前的模型观察矩阵

gl.glLoadIdentity();

// 3.移动到指定的位置

gl.glTranslatef(0.0f, 0.0f, -5.0f);

// 4.设置3个方向的旋转

gl.glRotatef(xrot, 1.0f, 0.0f, 0.0f);

gl.glRotatef(yrot, 0.0f, 1.0f, 0.0f);

gl.glRotatef(zrot, 0.0f, 0.0f, 1.0f);

texture = intBuffer.get(1);;

// 5.绑定纹理

gl.glBindTexture(GL10.GL_TEXTURE_2D, texture);

// 6.开启顶点和纹理功能

gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);

gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);

// 7.纹理和四边形对应的顶点

gl.glVertexPointer(3, GL10.GL_FIXED, 0, vertices);

gl.glTexCoordPointer(2, GL10.GL_FIXED, 0, texCoords);

// 8.绘制0

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.iBitmap, 0);

gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, 4, GL10.GL_UNSIGNED_BYTE, indices_0);

//绘制1

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.jBitmap, 0);

gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, 4, GL10.GL_UNSIGNED_BYTE, indices_1);

//绘制2

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.kBitmap, 0);

gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, 4, GL10.GL_UNSIGNED_BYTE, indices_2);

//绘制3

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.lBitmap, 0);

gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, 4, GL10.GL_UNSIGNED_BYTE, indices_3);

//绘制4

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.mBitmap, 0);

gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, 4, GL10.GL_UNSIGNED_BYTE, indices_4);

//绘制5

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.close_Bitmap, 0);

gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, 4, GL10.GL_UNSIGNED_BYTE, indices_5);

if(0==n_close_flag)

{

// 重置当前的模型观察矩阵

gl.glLoadIdentity();

// 左移 1.5 单位，并移入屏幕 5.0

gl.glTranslatef(-4.5f, 3.0f, -5.0f);

gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);

gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);

texture = intBuffer.get(0);

// 绑定纹理

gl.glBindTexture(GL10.GL_TEXTURE_2D, texture);

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.close_Bitmap, 0);

// 绘制关闭按钮

// 设置和绘制正方形

gl.glVertexPointer(3, GL10.GL_FIXED, 0, quaterBuffer);

gl.glTexCoordPointer(2, GL10.GL_FIXED, 0, texCoords_rect);

gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4);

//gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, 4, GL10.GL_UNSIGNED_BYTE, indices_5);

n_close_flag=1;

}

// 9.关闭顶点和纹理功能

gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);

gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);

xrot+=0.5f;

yrot+=0.6f;

zrot+=0.3f;

}

@Override

public void onSurfaceChanged(GL10 gl, int width, int height)

{

float ratio = (float) (width-n_view_start_x) / (height-n_view_start_x);

//设置OpenGL场景的大小

//gl.glViewport(0, 0, width, height);

gl.glViewport(n_view_start_x, n_view_start_y, width-n_view_start_x, height-n_view_start_y);

//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)

{

// 绿色背景

gl.glClearColor(0, 1, 0, 0);

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);

/*

// 1.允许2D贴图,纹理

gl.glEnable(GL10.GL_TEXTURE_2D);

IntBuffer intBuffer = IntBuffer.allocate(1);

// 2.创建纹理

gl.glGenTextures(1, intBuffer);

texture = intBuffer.get();

// 3.设置要使用的纹理

gl.glBindTexture(GL10.GL_TEXTURE_2D, texture);

// 4.生成纹理

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.mBitmap, 0);

// 5.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);

*/

// 1.允许2D贴图,纹理

gl.glEnable(GL10.GL_TEXTURE_2D);

// 2.创建纹理

gl.glGenTextures(2, intBuffer);

texture = intBuffer.get(0);

// 3.设置要使用的纹理

gl.glBindTexture(GL10.GL_TEXTURE_2D, texture);

// 4.生成纹理

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.close_Bitmap, 0);

texture = intBuffer.get(1);

// 3.设置要使用的纹理

gl.glBindTexture(GL10.GL_TEXTURE_2D, texture);

// 4.生成纹理

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GLImage.nBitmap, 0);

// 5.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);

}

}

赞助本站

人工智能实验室

相关热词： glDrawElements OpenGL ES 纹理

上一篇：Android开发简单的乘法计算器,并添加退出菜单
下一篇：AudioTrack中write函数size android开发教程
相关内容
AiLab云推荐
最新资讯
本月热点
热门排行
最坏时期已过，美国5G市场即将迎来回暖？

阅读量：47333

华为5G-A实现规模组网，下载速度超过4Gbps，比5G快10倍

阅读量：46669

回望2023年5G发展：释放和提升价值成最大课题

阅读量：12241

全球吹响5G-A商用号角

阅读量：11126

5.5G在欧洲突破，DNA首次将5.5G技术引入现网

阅读量：10231

首发新款麒麟5G芯片！曝华为nova 12系列12月26日登场

阅读量：10003

推荐内容
展开

热门栏目HotCates

关于我们

人工智能实验室（AiLab：Artificial Intelligence Laboratory）中国人工智能领域的专业媒体平台，始于2010年的中国AI创业先行者，专注人工智能、机器人、无人驾驶、可穿戴、模式识别、物联网、云计算等新兴技术信息资讯，是人工智能爱好者学习和交流平台，是一群梦想者与实践者的网络家园！

版权声明

本站部分文章来源于互联网以及网友投稿，本站只负责对文章进行整理、排版、编辑，是出于知识传递之目的，并不意味着赞同其观点或证实其内容的真实性。如果您有什么意见或建议，请联系E-mail：kefu#ailab.cn(将#换成@)！

Copyright © 2010-2024 AiLab Team. 人工智能实验室 版权所有    关于我们 | 联系我们 | 广告服务 | 公司动态 | 免责声明 | 隐私条款 | 工作机会 | 展会港