Vertex Attributes, Vertex Arrays, and Buffer Objects - Praise for OpenGL ES 30 Programming Guide - page 146

Example 6-5 Drawing with and without Vertex Buffer Objects

#define VERTEX_POS_SIZE 3 // x, y, and z
#define VERTEX_COLOR_SIZE 4 // r, g, b, and a

#define VERTEX_POS_INDX 0
#define VERTEX_COLOR_INDX 1
//
// vertices - pointer to a buffer that contains vertex
// attribute data
// vtxStride - stride of attribute data / vertex in bytes
// numIndices - number of indices that make up primitives
// drawn as triangles
// indices - pointer to element index buffer
//
void DrawPrimitiveWithoutVBOs(GLfloat *vertices,
GLint vtxStride,
GLint numIndices,
GLushort *indices)
{
GLfloat *vtxBuf = vertices;

glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);

glEnableVertexAttribArray(VERTEX_POS_INDX);
glEnableVertexAttribArray(VERTEX_COLOR_INDX);

glVertexAttribPointer(VERTEX_POS_INDX, VERTEX_POS_SIZE,
GL_FLOAT, GL_FALSE, vtxStride,
vtxBuf);
vtxBuf += VERTEX_POS_SIZE;

glVertexAttribPointer(VERTEX_COLOR_INDX,
VERTEX_COLOR_SIZE, GL_FLOAT,
GL_FALSE, vtxStride, vtxBuf);

glDrawElements(GL_TRIANGLES, numIndices, GL_UNSIGNED_SHORT,
indices);

glDisableVertexAttribArray(VERTEX_POS_INDX);
glDisableVertexAttribArray(VERTEX_COLOR_INDX);
}

void DrawPrimitiveWithVBOs(ESContext *esContext,
GLint numVertices, GLfloat *vtxBuf,
GLint vtxStride, GLint numIndices,
GLushort *indices)