//VERTEX
attribute vec2 coord2d
;
void
main
(
void
)
{
gl_Position
=
vec4
(
coord2d
,
0.0
,
1.0
)
;
}
//FRAGMENT
void
main
(
void
)
{
gl_FragColor
[
0
]
=
gl_FragCoord.
x
/
640.0
;
gl_FragColor
[
1
]
=
gl_FragCoord.
y
/
480.0
;
gl_FragColor
[
2
]
=
0.5
;
}