use attribute variable in shader

Signed-off-by: dayo7116 <DLi@esri.com>
render dynamically

Signed-off-by: dayo7116 <DLi@esri.com>
use anonymous function to avoid global variables

Signed-off-by: dayo7116 <DLi@esri.com>
pass uniform to ps

Signed-off-by: dayo7116 <DLi@esri.com>
update: going to chap 3

Signed-off-by: dayo7116 <DLi@esri.com>