Vertex Attributes, Vertex Arrays, and Buffer Objects - Praise for OpenGL ES 30 Programming Guide - page 130

Example 6-1 Array of Structures (continued)

VERTEX_TEXC00RD1_SIZE,
GL_FLOAT, GL_FALSE,

VERTEX_ATTRIB_SIZE * sizeof(float),

(p + VERTEX_TEXC00RD1_0FFSET));

In Example 6-2, position , normal , and texture coordinates 0 and 1 are
stored in separate buffers.

Example 6-2 Structure of Arrays

float *position = (float*) malloc(numVertices *
VERTEX_POS_SIZE * sizeof(float));
float *normal = (float*) malloc(numVertices *
VERTEX_NORMAL_SIZE * sizeof(float));
float *texcoordO = (float*) malloc(numVertices *
VERTEX_TEXCOORD0_SIZE * sizeof(float));
float *texcoordl = (float*) malloc(numVertices *
VERTEX_TEXC00RD1_SIZE * sizeof(float));

// position is vertex attribute 0
glVertexAttribPointer(VERTEX_POS_INDX, VERTEX_POS_SIZE,
GL_FLOAT, GL_FALSE,
VERTEX_POS_SIZE * sizeof(float),
position);

// normal is vertex attribute 1
glVertexAttribPointer(VERTEX_NORMAL_INDX, VERTEX_NORMAL_SIZE,
GL_FLOAT, GL_FALSE,
VERTEX_NORMAL_SIZE * sizeof(float),
normal);

// texture coordinate 0 is vertex attribute 2
glVertexAttribPointer(VERTEX_TEXCOORDO_INDX,
VERTEX_TEXCOORD0_SIZE,
GL_FLOAT, GL_FALSE,
VERTEX_TEXCOORD0_SIZE *
sizeof(float), texcoordO);

// texture coordinate 1 is vertex attribute 3
glVertexAttribPointer(VERTEX_TEXCOORDl_INDX,
VERTEX_TEXC00RD1_SIZE,
GL_FLOAT, GL_FALSE,
VERTEX_TEXC00RD1_SIZE * sizeof(float),

texcoordl);