rename

Signed-off-by: DayongLi <DLi@esri.com>
update

Signed-off-by: DayongLi <DLi@esri.com>
use vertex attribute in vertex buffer

Signed-off-by: DayongLi <DLi@esri.com>
add util

Signed-off-by: DayongLi <DLi@esri.com>
vb & va update

Signed-off-by: DayongLi <DLi@esri.com>