func (vao *VAO) Enable(elements int, buffer *Buffer, attrib Attrib, opts ...VAOOption) {
opt := vaoOption{
stride: 0,
offset: 0,
normalize: false,
}
for _, o := range opts {
o(&opt)
}
gl.BindVertexArray(vao.id)
defer gl.BindVertexArray(0)
gl.BindBuffer(gl.ARRAY_BUFFER, buffer.id)
defer gl.BindBuffer(gl.ARRAY_BUFFER, 0)
gl.EnableVertexAttribArray(attrib.Location())
gl.VertexAttribPointer(
attrib.Location(),
int32(elements),
buffer.data.typ,
opt.normalize,
int32(opt.stride*buffer.data.siz),
gl.PtrOffset(opt.offset*buffer.data.siz))
}
func (vao *VAO) Use() {
gl.BindVertexArray(vao.id)
}