1const POS = array(
2    vec2f(0, -1) * 0.5,
3    vec2f(1, 1) * 0.5,
4    vec2f(-1, 1) * 0.5,
5);
6
7@vertex
8fn vertex(@builtin(vertex_index) vertex_index: u32) -> @builtin(position) vec4f {
9    if vertex_index == 0 {
10        return vec4f(POS[0], 0, 1);
11    } else if vertex_index == 1 {
12        return vec4f(POS[1], 0, 1);
13    } else {
14        return vec4f(POS[2], 0, 1);
15    }
16}
17
18@fragment
19fn fragment() -> @location(0) vec4f {
20    return vec4f(1, 1, 0, 1);
21}