#version 460

const vec2 vertices[3] = vec2[3](
    vec2(-0.5, 0.5),
    vec2( 0.5, 0.5),
    vec2( 0.0, -0.5)
);

void main()
{
    gl_Position = vec4(vertices[gl_VertexIndex], 0.0, 1.0);
}