float scalar(float x, float y) {
    x = length(x);
    x = distance(x, y);
    x = dot(x, y);
    x = normalize(x);
    return x;
}

float2 vector(float2 x, float2 y) {
    x = length(x).xx;
    x = distance(x, y).xx;
    x = dot(x, y).xx;
    x = normalize(x);
    return x;
}

void main() {
    float x = scalar(1, 2);
    float2 y = vector(float2(1, 2), float2(3, 4));
    sk_FragColor = half4(half(x), half2(y), 1);
}