android绘制立方体带坐标,Android Opengl 画立方体

吉吉过六级

于 2021-05-25 23:37:31 发布

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文章标签： android绘制立方体带坐标

此博客介绍了如何在Android中使用GLSurfaceView进行OpenGL ES渲染，包括创建3D模型、设置旋转、纹理贴图和触摸事件处理。展示了如何初始化顶点缓冲区、纹理坐标和法线缓冲，以及关键的OpenGL ES调用和纹理加载过程。

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package com.android.antking;

import java.nio.ByteBuffer;

import java.nio.ByteOrder;

import java.nio.FloatBuffer;

import java.nio.IntBuffer;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

import android.content.Context;

import android.opengl.GLSurfaceView.Renderer;

import android.opengl.GLUtils;

import android.view.KeyEvent;

import android.view.MotionEvent;

public class GLRender1 implements Renderer

{

private final IntBuffer

mVertexBuffer;

private final IntBuffer nBuffer;

private final IntBuffer normals;

float xrot, yrot, zrot;

int[] texture;

int i=0;

boolean key = false;

int one =0x10000;

FloatBuffer lightAmbient= FloatBuffer.wrap(new

float[]{0.5f,0.5f,0.5f,1.0f});

FloatBuffer lightDiffuse= FloatBuffer.wrap(new

float[]{0.5f,1.0f,1.0f,1.0f});

FloatBuffer lightPosition = FloatBuffer.wrap(new

float[]{0.0f,0.0f,1.0f,1.0f});

public GLRender1(Context context){

int texCoord[]={

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,

};

int vertices[]={

-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,

};

int nolmos[]={

0,0,one,

0,0,-one,

0,one,0,

0,-one,0,

one,0,0,

-one,0,0,

};

ByteBuffer vbb =

ByteBuffer.allocateDirect(vertices.length

* 4);

vbb.order(ByteOrder.nativeOrder());

mVertexBuffer =

vbb.asIntBuffer();

mVertexBuffer.put(vertices);

mVertexBuffer.position(0);

ByteBuffer v

ByteBuffer.allocateDirect(texCoord.length

*4);

v.order(ByteOrder.nativeOrder());

nBuffer =

v.asIntBuffer();

nBuffer.put(texCoord);

nBuffer.position(0);

ByteBuffer vv

ByteBuffer.allocateDirect(nolmos.length

*4);

vv.order(ByteOrder.nativeOrder());

normals =

vv.asIntBuffer();

normals.put(nolmos);

normals.position(0);

}

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 indices1 = ByteBuffer.wrap(new byte[]{

0,1,3,2,

0,0,0,0,

});

ByteBuffer indices2 = ByteBuffer.wrap(new byte[]{

0,0,0,0,

4,5,7,6,

0,0,0,0,

});

ByteBuffer indices3 = ByteBuffer.wrap(new byte[]{

0,0,0,0,

8,9,11,10,

0,0,0,0,

});

ByteBuffer indices4 = ByteBuffer.wrap(new byte[]{

0,0,0,0,

12,13,15,14,

0,0,0,0,

});

ByteBuffer indices5 = ByteBuffer.wrap(new byte[]{

0,0,0,0,

16,17,19,18,

0,0,0,0,

});

ByteBuffer indices6 = ByteBuffer.wrap(new byte[]{

0,0,0,0,

20,21,23,22,

});

@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.glLoadIdentity();

gl.glEnable(GL10.GL_LIGHTING);

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

//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);

// 绑定纹理

gl.glEnableClientState(GL10.GL_NORMAL_ARRAY);

gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);

gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);

//纹理和四边形对应的顶点

gl.glNormalPointer(GL10.GL_FIXED, 0, normals);

//gl.glTexCoordPointer(2, GL10.GL_FIXED, 0, nBuffer);

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

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

gl.glBindTexture(GL10.GL_TEXTURE_2D, texture[i]);

gl.glDrawElements(GL10.GL_TRIANGLE_STRIP,24,

GL10.GL_UNSIGNED_BYTE, indices);

gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);

gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);

gl.glDisableClientState(GL10.GL_NORMAL_ARRAY);

xrot+=0.5f;

yrot+=0.6f;

zrot+=0.3f;

if(key){

gl.glEnable(GL10.GL_BLEND); // 打开混合

gl.glDisable(GL10.GL_DEPTH_TEST);

}else{

gl.glDisable(GL10.GL_BLEND);

gl.glEnable(GL10.GL_DEPTH_TEST);

}

@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.glDisable(GL10.GL_DITHER);

gl.glClearColor(0, 0, 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);

//允许2D贴图,纹理

gl.glEnable(GL10.GL_TEXTURE_2D);

IntBuffer intBuffer = IntBuffer.allocate(6);

// 创建纹理

gl.glGenTextures(6, intBuffer);

//loadTexture(gl,context);

texture = intBuffer.array();

// 设置要使用的纹理

gl.glBindTexture(GL10.GL_TEXTURE_2D, texture[i]);

GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0,GLImage.mt[i],

0);