http://www.opengl.or...n#Vertex_format


my question: why? what's the benefit of Example 2 ?
what's the difference of binding a buffer vs binding a buffer to a binding point ?
and is the vertex buffer binding from glBindVertexBuffer a VAO state ?

to render multiple vbo's with the same vertex layout i could use

[font=courier new,courier,monospace]glVertexAttribFormat(...)[/font]
glVertexAttribBinding(..., 0);
glVertexAttribFormat(...)
glVertexAttribBinding(..., 0);
glBindVertexBuffer(0,...) / draw / glBindVertexBuffer(0,...) / draw ... right ?

can i do the same with VertexAttributePointer ?
glVertexAttribPointer(...) glBindBuffer(...) draw() glBindBuffer(...) draw()


Example1
[source lang="java"]
glBindBuffer(GL_ARRAY_BUFFER, buff);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), reinterpret_cast<void*>(baseOffset + offsetof(position, Vertex)));
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), reinterpret_cast<void*>(baseOffset + offsetof(normal, Vertex)));
glVertexAttribPointer(2, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(Vertex), reinterpret_cast<void*>(baseOffset + offsetof(color, Vertex)));[/source]

Example2
[source lang="java"]
glBindVertexBuffer(0, buff, baseOffset, sizeof(sizeof(Vertex)));
glVertexAttribFormat(0, 3, GL_FLOAT, GL_FALSE, offsetof(position, Vertex));
glVertexAttribBinding(0, 0);
glVertexAttribFormat(1, 3, GL_FLOAT, GL_FALSE, offsetof(normal, Vertex));
glVertexAttribBinding(1, 0);
glVertexAttribFormat(2, 4, GL_UNSIGNED_BYTE, GL_TRUE, offsetof(color, Vertex));
glVertexAttribBinding(2, 0);[/source]