// XC_BUILTIN_SKYBOX_VULKAN_VS
#version 450

layout(location = 0) out vec2 vNdc;

void main() {
    const vec2 positions[3] = vec2[3](
        vec2(-1.0, -1.0),
        vec2(-1.0,  3.0),
        vec2( 3.0, -1.0)
    );

    vec2 position = positions[gl_VertexIndex];
    gl_Position = vec4(position, 1.0, 1.0);
    vNdc = position;
}