Generated with sdf2stl.saej.in

float smoothMin( float a, float b, float k) { float r = 1. + exp2(-abs(a-b)/k); return min(a,b) - k * log2(r); } float sdLink(vec3 position, float height, float majorRadius, float minorRadius) { vec3 q = vec3(position.x, max(abs(position.y) - height, 0.), position.z); return length(vec2(length(q.xy) - majorRadius, q.z)) - minorRadius; } float map(in vec3 position) { float r2 = 8.; float k = 2.; float signedDistance = sdLink(position, 18., 18., r2); signedDistance = smoothMin(signedDistance, sdLink(position.yzx, 18., 18., r2), k); signedDistance = smoothMin(signedDistance, sdLink(position.zxy, 18., 18., r2), k); return signedDistance; }