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我无法理解我的 VBO 代码是否正确。下面是我的代码，它正在工作，但不是 VBO，然后我展示了我在尝试让 VBO 工作时所做的工作，我已经取得了一些成功，因为我的 Sprites/Quads 被绘制了，但是当它们是绘制，我没有看到任何性能提升。有人可以建议我是否正确执行此操作，只有两个专门针对 Java 中 Android 上的 VBO 的 tuts 之一（我看过 C 示例，但对它们没有任何兴趣）。

我不确定将一些代码放入构造函数中是否正确 - 每次绘制精灵时都不应调用此代码吗？

任何帮助，将不胜感激。

标准（非 VBO 代码、注意、X/YplotLeft/Right/Top/Bottom 已正确定义）

//This code is the from the drawSprite method of my VBO Class.

    vertices[0]=xPlotLeft;
    vertices[1]=yPlotTop;
    vertices[2]=0;
    vertices[3]=0;
    vertices[4]=0;

    vertices[5]=xPlotRight;
    vertices[6]=yPlotTop;
    vertices[7]=0;
    vertices[8]=1;
    vertices[9]=0;

    vertices[10]=xPlotLeft;
    vertices[11]=yPlotBottom;
    vertices[12]=0;
    vertices[13]=0;
    vertices[14]=1;

    vertices[15]=xPlotRight;
    vertices[16]=yPlotBottom;
    vertices[17]=0;
    vertices[18]=1;
    vertices[19]=1;

    //Reset Byte Buffer position

    vertexBuf.rewind();
    vertexBuf.put(vertices).position(0);

    //Bind the texture
    GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, texID);      
    //Use the program created earlier
    GLES20.glUseProgram(iProgId);
    //Combine the rotation matrix with the projection and camera view
    Matrix.multiplyMM(mvpMatrix2, 0, mvpMatrix, 0,  mRotationMatrix, 0);
    // get handle to shape's transformation matrix
    mMVPMatrixHandle = GLES20.glGetUniformLocation(iProgId, "uMVPMatrix");
     // Apply the projection and view transformation
    GLES20.glUniformMatrix4fv(mMVPMatrixHandle, 1, false, mvpMatrix2, 0);
    //Set starting position for vertices
    vertexBuf.position(0);
    //Specify attributes for vertex (X,Y,Z)
    GLES20.glVertexAttribPointer(iPosition, 3, GLES20.GL_FLOAT, false, 5 * 4, vertexBuf);
    //Enable attribute for position
    GLES20.glEnableVertexAttribArray(iPosition);
    //Set starting position for vertices (texture)
    vertexBuf.position(3);
    //Specify attributes for vertex (S T for textures)
    GLES20.glVertexAttribPointer(iTexCoords, 2, GLES20.GL_FLOAT, false, 5 * 4, vertexBuf);
    //Enable attribute for texture
    GLES20.glEnableVertexAttribArray(iTexCoords);
    //Enable Alpha blending and set blending function
    GLES20.glEnable(GLES20.GL_BLEND); 
    GLES20.glBlendFunc(GLES20.GL_ONE, GLES20.GL_ONE_MINUS_SRC_ALPHA);
    //Draw
    GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
    //Disable Alpha blending
    GLES20.glDisable(GLES20.GL_BLEND);

VBO 代码

在类级别定义：

//Buffer object for VBO (We will copy data from floatBuffer into this)
    final int buffers[] = new int[1];

我已将以下代码添加到我的 VBO 类的构造函数中：

    //Generate buffers as needed

GLES20.glGenBuffers(1, buffers, 0);

// Bind to the buffer. Future commands will affect this buffer specifically.
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, buffers[0]);

GLES20.glBufferData(GLES20.GL_ARRAY_BUFFER, vertexBuf.capacity() * 4,vertexBuf, GLES20.GL_STATIC_DRAW);

//drawSprite方法的主要VBO代码：

    vertices[0]=xPlotLeft;
    vertices[1]=yPlotTop;
    vertices[2]=0;
    vertices[3]=0;
    vertices[4]=0;

    vertices[5]=xPlotRight;
    vertices[6]=yPlotTop;
    vertices[7]=0;
    vertices[8]=1;
    vertices[9]=0;

    vertices[10]=xPlotLeft;
    vertices[11]=yPlotBottom;
    vertices[12]=0;
    vertices[13]=0;
    vertices[14]=1;

    vertices[15]=xPlotRight;
    vertices[16]=yPlotBottom;
    vertices[17]=0;
    vertices[18]=1;
    vertices[19]=1;


    //Reset Byte Buffer position

    vertexBuf.rewind();
    vertexBuf.put(vertices).position(0);

// Transfer data from client memory

    GLES20.glBufferSubData(GLES20.GL_ARRAY_BUFFER, 0, vertexBuf.capacity() * 4,vertexBuf);

    //Bind the texture
    GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, texID);      
    //Use program
    GLES20.glUseProgram(iProgId);
    //Combine the rotation matrix with the projection and camera view
    Matrix.multiplyMM(mvpMatrix2, 0, mvpMatrix, 0,  mRotationMatrix, 0);
    //get handle to shape's transformation matrix
    mMVPMatrixHandle = GLES20.glGetUniformLocation(iProgId, "uMVPMatrix");
    //Apply the projection and view transformation
    GLES20.glUniformMatrix4fv(mMVPMatrixHandle, 1, false, mvpMatrix2, 0);
    //Specify attributes for vertex (X,Y,Z)
    GLES20.glVertexAttribPointer(iPosition, 3, GLES20.GL_FLOAT, false, 5 * 4, 0);
    //Enable attribute for position
    GLES20.glEnableVertexAttribArray(iPosition);
    //Specify attributes for vertex S & T
    GLES20.glVertexAttribPointer(iTexCoords, 2, GLES20.GL_FLOAT, false, 5 * 4, 3 * 4);
    //Enable attribute for texture
    GLES20.glEnableVertexAttribArray(iTexCoords);
    //Enable Alpha blending and set blending function
    GLES20.glEnable(GLES20.GL_BLEND); 
    GLES20.glBlendFunc(GLES20.GL_ONE, GLES20.GL_ONE_MINUS_SRC_ALPHA);
    //Draw
    GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
    //Disable Alpha blending
    GLES20.glDisable(GLES20.GL_BLEND);

}
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