OpenGL入门系列- gles 2.0 的 VBO 用法和例子

代码： 改的opengles 2.0 入门指导中的demo, 在次基础之上增加VBO 调用。

// Hello_Triangle.c
//
//    This is a simple example that draws a single triangle with
//    a minimal vertex/fragment shader.  The purpose of this
//    example is to demonstrate the basic concepts of
//    OpenGL ES 2.0 rendering.
#include <stdlib.h>
#include <GLES/gl.h>
#include <GLES/egl.h>
#include "esUtil.h"

GLuint _programObject;

typedef struct
{
   // Handle to a program object
   GLuint programObject;

} UserData;

///
// Create a shader object, load the shader source, and
// compile the shader.
//

GLuint LoadS