Method eval_general

kernels/subdiv/patch_eval_simd.h:65–75

        }
        
        vbool eval_general(const vbool& valid, const typename Patch::SubdividedGeneralPatch* patch, const vfloat& U, const vfloat& V, const size_t depth)
        {
          vbool ret = false;
          const vint l = (vint)floor(0.5f*U); const vfloat u = 2.0f*frac(0.5f*U)-0.5f; 
          const vint h = (vint)floor(0.5f*V); const vfloat v = 2.0f*frac(0.5f*V)-0.5f; 
          const vint i = (h<<2)+l; assert(all(valid,i<patch->N));
          foreach_unique(valid,i,[&](const vbool& valid, const int i) {
              ret |= eval(valid,patch->child[i],u,v,1.0f,depth+1);
            });
          return ret;
        }
        
        vbool eval(const vbool& valid, Ref This, const vfloat& u, const vfloat& v, const float dscale, const size_t depth) 
        {