GPU Pro 4

36 I Geometry Manipulation

compute the actual index of each vertex. We believe that such parameters

are not necessarily useful for all scenarios. The registers used for those

parameters should become user-defined variables to store the DrawID, for

example.

• The series of if statements required to select the right vertex format inside

the vertex fetching function is not very elegant as it introduces a level of

indirection. By backing subroutines in buffers, we could select a subroutine

per draw and effectively hide this indirection.

• The strategy behind the Programmable Vertex Pulling Rendering Pipeline

is to replace CPU resource switching by GPU-based ...