NAME

       al_lock_vertex_buffer - Allegro 5 API

SYNOPSIS

              #include <allegro5/allegro_primitives.h>

              void* al_lock_vertex_buffer(ALLEGRO_VERTEX_BUFFER* buffer, int offset,
                 int length, int flags)

DESCRIPTION

       Locks  a vertex buffer so you can access its data.  Will return NULL if the parameters are
       invalid, if reading is requested from a write only buffer, or if  the  buffer  is  already
       locked.

       Parameters:

       • buffer - Vertex buffer to lock

       • offset - Vertex index of the start of the locked range

       • length - How many vertices to lock

       • flags - ALLEGRO_LOCK_READONLY, ALLEGRO_LOCK_WRITEONLY or ALLEGRO_LOCK_READWRITE

SINCE

       5.1.3

SEE ALSO

       ALLEGRO_VERTEX_BUFFER(3alleg5), al_unlock_vertex_buffer(3alleg5)