#version 450

layout(location = 0) out vec3 color;

void main() {
    vec2 positions[3] = vec2[](
        vec2( 0.0, -0.5),
        vec2( 0.5,  0.5),
        vec2(-0.5,  0.5)
    );
    gl_Position = vec4(positions[gl_VertexIndex], 0.0, 1.0);
    color = vec3(1.0, 0.0, 0.0);
}