// only test purpose override value: f32; @vertex fn vs_main(@builtin(vertex_index) in_vertex_index: u32) -> @builtin(position) vec4<f32> { // only test purpose _ = value; let x = f32(i32(in_vertex_index) - 1); let y = f32(i32(in_vertex_index & 1u) * 2 - 1); return vec4<f32>(x, y, 0.0, 1.0); } @fragment fn fs_main() -> @location(0) vec4<f32> { // only test purpose _ = value; return vec4<f32>(1.0, 0.0, 0.0, 1.0); }