ufna

struct Functions
{
    float distLine(float2 p, float2 a, float2 b) {
        float2 ap = p - a;
        float2 ab = b - a;
        float aDotB = clamp(dot(ap, ab) / dot(ab, ab), 0.0, 1.0);
        return length(ap - ab * aDotB);
    }

    float drawLine(float2 uv, float2 a, float2 b) {