Function eval

kernels/subdiv/bezier_patch.h:125–130

    }

    static __forceinline Vertex_t eval(const Vertex matrix[4][4], const float uu, const float vv) 
    {      
      const Vec4f Bu = BezierBasis::eval(uu);
      const Vec4f Bv = BezierBasis::eval(vv);
      return bilinear(Bu,matrix,Bv);
    }

    static __forceinline Vertex_t eval_du(const Vertex matrix[4][4], const float uu, const float vv) 
    {