void VertexBuffer::addAttribute(unsigned int id, unsigned int components, int offset)
{
Attribute a;
a.id = id;
a.components = components;
a.offset = offset;
mAttributes.push_back(a);
calculateStride();
}
VertexLayout::Impl::Impl(Attributes& attributes)
: attributes(attributes)
, stride(calculateStride(this->attributes)) {}