AABB of a disc

void discAabb(Vec3 *minOut, Vec3 *maxOut, Vec3 center, Vec3 normal, float radius)
{
   Vec3 half;
   float x2 = normal.x * normal.x;
   float y2 = normal.y * normal.y;
   float z2 = normal.z * normal.z;
 
   half.x = radius * sqrtf(y2 + z2);
   half.y = radius * sqrtf(z2 + x2);
   half.z = radius * sqrtf(x2 + y2);
 
   *minOut = center - half;
   *maxOut = center + half;
}