weirdboxes.cginc

float fBoxCheap(float3 p, float3 b) { //cheap box
    return vmax(abs(p) - b);
}

inline float fBox(float3 p, float3 b) {
    float3 d = abs(p) - b;
    return length(max(d, float3(0,0,0))) + vmax(min(d, float3(0,0,0)));
}

inline float DistanceFunction(float3 pos)
{
    float t = _Time.x;
    pModMirror2(pos.xy, float2(t,t));
    float box = fBox(pos, float3(1,1,1));
    float sphere = length(pos - float3(1,1,1)) - 1;
    float d = min(box,sphere);
    float guard = -fBoxCheap(pos, float3(0.25,0.25,0.25));
    guard = abs(guard) + 0.05;
    return d;
    return min(d,guard);
}