AndroidOpenGL绘制3D立方体全解.docx
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AndroidOpenGL绘制3D立方体全解
AndroidOpenGLES案例总结
3D旋转立方体
彩色立方体
控制大小:
gl.glScalef（1.2f,1.2f,1.2f）;//**********大小
控制旋转速度
roate+=0.3f;//********设置旋转角度的增量
packagecom.spl.canvasdemo31.renderer;
importandroid.opengl.GLSurfaceView.Renderer;
importjava.nio.ByteBuffer;
importjava.nio.ByteOrder;
importjava.nio.IntBuffer;
importjavax.microedition.khronos.egl.EGLConfig;
importjavax.microedition.khronos.opengles.GL10;
/**
*Cube渲染器类
*@authorspl
*
*/
publicclassCubeRendererimplementsRenderer{
publicclassMyCube{
privateIntBuffervertexBuffer;
privateIntBuffercolorBuffer;
privateByteBufferindexBuffer;
publicMyCube（）
{
intone=65535;
//每个顶点的坐标值（x,y,z）
intvertex[]={
-one,-one,-one,
one,-one,-one,
one,one,-one,
-one,one,-one,
-one,-one,one,
one,-one,one,
one,one,one,
-one,one,one
};
//立方体每个顶点的颜色值，格式为RRGGBBAA
intcolors[]={
0,0,0,one,
one,0,0,one,
one,one,0,one,
0,one,0,one,
0,0,one,one,
one,0,one,one,
one,one,one,one,
0,one,one,one
};
//三角形顶点绘制顺序
byteindex[]={
0,4,5,0,5,1,
1,5,6,1,6,2,
2,6,7,2,7,3,
3,7,4,3,4,0,
4,7,6,4,6,5,
3,0,1,3,1,2
};
ByteBuffervbb=ByteBuffer.allocateDirect（vertex.length*4）;
vbb.order（ByteOrder.nativeOrder（））;
vertexBuffer=vbb.asIntBuffer（）;
vertexBuffer.put（vertex）;
vertexBuffer.position（0）;
ByteBuffercbb=ByteBuffer.allocateDirect（colors.length*4）;
cbb.order（ByteOrder.nativeOrder（））;
colorBuffer=cbb.asIntBuffer（）;
colorBuffer.put（colors）;
colorBuffer.position（0）;
indexBuffer=ByteBuffer.allocateDirect（index.length）;
indexBuffer.put（index）;
indexBuffer.position（0）;
}
publicvoiddraw（GL10gl）
{
gl.glFrontFace（GL10.GL_CW）;
gl.glVertexPointer（3,GL10.GL_FIXED,0,vertexBuffer）;
gl.glColorPointer（4,GL10.GL_FIXED,0,colorBuffer）;
gl.glDrawElements（GL10.GL_TRIANGLES,36,GL10.GL_UNSIGNED_BYTE,indexBuffer）;
}
}
privateMyCubemyCube;
privatefloatroate;
publicCubeRenderer（）{
myCube=newMyCube（）;
}
publicvoidonDrawFrame（GL10gl）{
//填充屏幕
gl.glClear（GL10.GL_COLOR_BUFFER_BIT|GL10.GL_DEPTH_BUFFER_BIT）;
//设置模型视景矩阵为当前操作矩阵
gl.glMatrixMode（GL10.GL_MODELVIEW）;
//将坐标原点移动到屏幕中心
gl.glLoadIdentity（）;
//移动坐标系
gl.glTranslatef（0,0,-6.0f）;
//在Y轴方向旋转坐标系
gl.glRotatef（roate,0,1,0）;
//在X轴方向旋转坐标系
gl.glRotatef（roate*0.25f,1,0,0）;
gl.glRotatef（roate,0,0,1）;
/////////////////////////////////////
gl.glScalef（1.2f,1.2f,1.2f）;//**********大小
///////////////////////////////////
//开启顶点坐标
gl.glEnableClientState（GL10.GL_VERTEX_ARRAY）;
//开启颜色
gl.glEnableClientState（GL10.GL_COLOR_ARRAY）;
myCube.draw（gl）;
roate+=0.3f;//********设置旋转角度的增量
}
publicvoidonSurfaceChanged（GL10gl,intwidth,intheight）{
gl.glViewport（0,0,width,height）;
floatratio=（float）width/height;
gl.glMatrixMode（GL10.GL_PROJECTION）;
gl.glLoadIdentity（）;
gl.glFrustumf（-ratio,ratio,-1,1,1,10）;
}
publicvoidonSurfaceCreated（GL10gl,EGLConfigconfig）{
gl.glEnable（GL10.GL_CULL_FACE）;
gl.glClearColor（0.5F,0.5F,0.5F,1.0F）;
}
}
纯色立方体
packagecom.spl.canvasdemo31.renderer;
importandroid.opengl.GLSurfaceView.Renderer;
importandroid.opengl.GLU;
importjava.nio.ByteBuffer;
importjava.nio.ByteOrder;
importjava.nio.FloatBuffer;
importjavax.microedition.khronos.egl.EGLConfig;
importjavax.microedition.khronos.opengles.GL10;
/**
*立方体（纯色）
*/
publicclassOpenGL3DRendererimplementsRenderer{
FloatBuffer_mCubeVertexBuffer;
//立方体顶点坐标
privatefloatbox[]={
//FRONT
-0.5f,-0.5f,0.5f,
0.5f,-0.5f,0.5f,
-0.5f,0.5f,0.5f,
0.5f,0.5f,0.5f,
//BACK
-0.5f,-0.5f,-0.5f,
-0.5f,0.5f,-0.5f,
0.5f,-0.5f,-0.5f,
0.5f,0.5f,-0.5f,
//LEFT
-0.5f,-0.5f,0.5f,
-0.5f,0.5f,0.5f,
-0.5f,-0.5f,-0.5f,
-0.5f,0.5f,-0.5f,
//RIGHT
0.5f,-0.5f,-0.5f,
0.5f,0.5f,-0.5f,
0.5f,-0.5f,0.5f,
0.5f,0.5f,0.5f,
//TOP
-0.5f,0.5f,0.5f,
0.5f,0.5f,0.5f,
-0.5f,0.5f,-0.5f,
0.5f,0.5f,-0.5f,
//BOTTOM
-0.5f,-0.5f,0.5f,
-0.5f,-0.5f,-0.5f,
0.5f,-0.5f,0.5f,
0.5f,-0.5f,-0.5f
};
privatefloatrotx;
privatefloatroty;
privatefloatrotz;
publicvoidonDrawFrame（GL10gl）{
//清除屏幕
gl.glClear（GL10.GL_COLOR_BUFFER_BIT|GL10.GL_DEPTH_BUFFER_BIT）;
//重置模型矩阵
gl.glLoadIdentity（）;
/***************这里设置颜色*********************/
gl.glColor4f（1f,0f,0f,1f）;//纯色的****************
//开启顶点坐标功能
gl.glEnableClientState（GL10.GL_VERTEX_ARRAY）;
//设置顶点坐标
gl.glVertexPointer（3,GL10.GL_FLOAT,0,_mCubeVertexBuffer）;
//保存matrix当前状态
gl.glPushMatrix（）;
//向屏幕移入5个单位
gl.glTranslatef（0.0f,0.0f,-5.0f）;
//设置旋转轴,以x轴旋转
gl.glRotatef（rotx,1,0,0）;
//设置旋转轴,以y轴旋转
gl.glRotatef（roty,0,1,0）;
//设置旋转轴,以z轴旋转
gl.glRotatef（rotz,0,0,1）;
//绘制第一个立方体面
gl.glDrawArrays（GL10.GL_TRIANGLE_STRIP,0,4）;
//绘制第二个立方体面
gl.glDrawArrays（GL10.GL_TRIANGLE_STRIP,4,4）;
//绘制第三个立方体面
gl.glDrawArrays（GL10.GL_TRIANGLE_STRIP,8,4）;
//绘制第四个立方体面
gl.glDrawArrays（GL10.GL_TRIANGLE_STRIP,12,4）;
//绘制第五个立方体面
gl.glDrawArrays（GL10.GL_TRIANGLE_STRIP,16,4）;
//绘制第六个立方体面
gl.glDrawArrays（GL10.GL_TRIANGLE_STRIP,20,4）;
//将matrix回复成上面push时的matrix
gl.glPopMatrix（）;
//关闭设置顶点功能
gl.glDisableClientState（GL10.GL_VERTEX_ARRAY）;
//使旋转角度不断变化
rotx+=0.2f;
roty+=0.3f;
rotz+=0.4f;
}
publicvoidonSurfaceChanged（GL10gl,intwidth,intheight）{
//设置场景大小
gl.glViewport（0,0,width,height）;
//设置投影矩阵
gl.glMatrixMode（GL10.GL_PROJECTION）;
//重置模型矩阵
gl.glLoadIdentity（）;
//设置窗口比例和透视图
GLU.gluPerspective（gl,45.0f,（float）width/（float）height,0.1f,100.0f）;
//设置模型矩阵
gl.glMatrixMode（GL10.GL_MODELVIEW）;
//重置模型矩阵
gl.glLoadIdentity（）;
}
publicvoidonSurfaceCreated（GL10gl,EGLConfigconfig）{
//将顶点坐标转换为native类型的数据
_mCubeVertexBuffer=createFloatBuffer（box）;
//平滑着色
gl.glShadeModel（GL10.GL_SMOOTH）;
//设置黑色背景
gl.glClearColor（0.0f,0.0f,0.0f,0.5f）;
//设置深度缓存
gl.glClearDepthf（1.0f）;
//启动深度测试
gl.glEnable（GL10.GL_DEPTH_TEST）;
//深度测试的类型
gl.glDepthFunc（GL10.GL_LEQUAL）;
//告诉系统对透视进行修正
gl.glHint（GL10.GL_PERSPECTIVE_CORRECTION_HINT,GL10.GL_NICEST）;
}
//转换为Native类型的浮点缓存
publicstaticFloatBuffercreateFloatBuffer（floatdata[]）
{
ByteBuffervbb=ByteBuffer.allocateDirect（data.length*4）;
vbb.order（ByteOrder.nativeOrder（））;
FloatBufferoutBuffer=vbb.asFloatBuffer（）;
outBuffer.put（data）.position（0）;
returnoutBuffer;
}
}
贴图立方体
packagecom.spl.canvasdemo31.renderer;
importandroid.content.Context;
importandroid.graphics.Bitmap;
importandroid.opengl.GLSurfaceView.Renderer;
importandroid.opengl.GLU;
importandroid.opengl.GLUtils;
importcom.spl.canvasdemo31.R;
importcom.spl.canvasdemo31.util.Utility;
importjava.nio.FloatBuffer;
importjavax.microedition.khronos.egl.EGLConfig;
importjavax.microedition.khronos.opengles.GL10;
/**
*立方体（贴图）
*/
publicclassOpenGL3DRendererTeximplementsRenderer{
FloatBuffer_mCubeVertexBuffer;
FloatBuffer_mCubeTexBuffer;
Context_context;
publicOpenGL3DRendererTex（Contextcontext）
{
_context=context;
}
//立方体顶点坐标
privatefloatbox[]={
//FRONT
-0.5f,-0.5f,0.5f,
0.5f,-0.5f,0.5f,
-0.5f,0.5f,0.5f,
0.5f,0.5f,0.5f,
//BACK
-0.5f,-0.5f,-0.5f,
-0.5f,0.5f,-0.5f,
0.5f,-0.5f,-0.5f,
0.5f,0.5f,-0.5f,
//LEFT
-0.5f,-0.5f,0.5f,
-0.5f,0.5f,0.5f,
-0.5f,-0.5f,-0.5f,
-0.5f,0.5f,-0.5f,
//RIGHT
0.5f,-0.5f,-0.5f,
0.5f,0.5f,-0.5f,
0.5f,-0.5f,0.5f,
0.5f,0.5f,0.5f,
//TOP
-0.5f,0.5f,0.5f,
0.5f,0.5f,0.5f,
-0.5f,0.5f,-0.5f,
0.5f,0.5f,-0.5f,
//BOTTOM
-0.5f,-0.5f,0.5f,
-0.5f,-0.5f,-0.5f,
0.5f,-0.5f,0.5f,
0.5f,-0.5f,-0.5f
};
//立方体纹理坐标
privatefloattexCoords[]={
//FRONT
0.0f,0.0f,
1.0f,0.0f,
0.0f,1.0f,
1.0f,1.0f,
//BACK
1.0f,0.0f,
1.0f,1.0f,
0.0f,0.0f,
0.0f,1.0f,
//LEFT
1.0f,0.0f,
1.0f,1.0f,
0.0f,0.0f,
0.0f,1.0f,
//RIGHT
1.0f,0.0f,
1.0f,1.0f,
0.0f,0.0f,
0.0f,1.0f,
//TOP
0.0f,0.0f,
1.0f,0.0f,
0.0f,1.0f,
1.0f,1.0f,
//BOTTOM
1.0f,0.0f,
1.0f,1.0f,
0.0f,0.0f,
0.0f,1.0f
};
privatefloatrotx;
privatefloatroty;
privatefloatrotz;
publicvoidonDrawFrame（GL10gl）{
//TODOAuto-generatedmethodstub
//清除屏幕
gl.glClear（GL10.GL_COLOR_BUFFER_BIT|GL10.GL_DEPTH_BUFFER_BIT）;
//重置模型矩阵
gl.glLoadIdentity（）;
//开启顶点坐标功能
gl.glEnableClientState（GL10.GL_VERTEX_ARRAY）;
gl.glEnableClientState（GL10.GL_TEXTURE_COORD_ARRAY）;
//设置顶点坐标
gl.glVertexPointer（3,GL10.GL_FLOAT,0,_mCubeVertexBuffer）;
gl.glTexCoordPointer（2,GL10.GL_FLOAT,0,_mCubeTexBuffer）;
//保存matrix当前状态
gl.glPushMatrix（）;
//向屏幕移入5个单位
gl.glTranslatef（0.0f,0.0f,-5.0f）;
//设置旋转轴,以x轴旋转
gl.glRotatef（rotx,1,0,0）;
//设置旋转轴,以y轴旋转
gl.glRotatef（roty,0,1,0）;
//设置旋转轴,以z轴旋转
gl.glRotatef（rotz,0,0,1）;
/***************************************/
floatfscale=1.0f;
gl.glScalef（fscale,fscale,fscale）;//大小
//----------------------------------------//
//绘制第一个立方体面
gl.glDrawArrays（GL10.GL_TRIANGLE_STRIP,0,4）;
//绘制第二个立方体面
gl.glDrawArrays（GL10.GL_TRIANGLE_STRIP,4,4）;
//绘制第三个立方体面
gl.glDrawArrays（GL10.GL_TRIANGLE_STRIP,8,4）;
//绘制第四个立方体面
gl.glDrawArrays（GL10.GL_TRIANGLE_STRIP,12,4）;
//绘制第五个立方体面
gl.glDrawArrays（GL10.GL_TRIANGLE_STRIP,16,4）;
//绘制第六个立方体面
gl.glDrawArrays（GL10.GL_TRIANGLE_STRIP,20,4）;
//将matrix回复成上面push时的matrix
gl.glPopMatrix（）;
//关闭设置顶点功能
gl.glDisableClientState（GL10.GL_VERTEX_ARRAY）;
gl.glDisableClientState（GL10.GL_TEXTURE_COORD_ARRAY）;
//使旋转角度不断变化
rotx+=0.2f;
roty+=0.3f;
rotz+=0.4f;
}
publicvoidonSurfaceChanged（GL10gl,intwidth,intheight）{
//TODOAuto-g
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