float* GeometryBuffer::getAttribute(VertexAttribute attribute, uint32 i) const
{
VertexElement* elem = declarations.find(attribute);
if( !elem ) return nullptr;
if(elem->stride == 0)
{
uint8 elemSize = elem->getSize();
const uint8* loc = &data.front() + elem->offset + (elemSize * i);
return (float*) loc;
}
// Calculate the starting position of the attribute data.
uint8 totalSize = declarations.getVertexSize();
uint8 localOffset = declarations.getOffset(elem->attribute);
// TODO: Check the bounds and return null in that case too.
const uint8* loc = &data.front() + (totalSize * i) + localOffset;
return (float*) loc;
}
void VertexDeclaration::add( const VertexElement& element ) {
_stride += element.getSize();
_elements.push_back(element);
}