Discrete Poisson solver Partial Derivative for neighborhood Np overlaps boundary (Big yet sparse linear system) N-∑后=∑G+∑w q∈Np q∈Mp∩ag q∈Np Partial derivative for interior points N-∑后=∑W ∈Np q∈NP cc可视计算研究中心 Visual Computing Research Center• Partial Derivative for neighborhood overlaps boundary(Big yet sparse linear system): • Partial Derivative for interior points: Discrete Poisson Solver 19 Np        − = + p q Np pq q Np q q N NP fp fq f v *     − = p q NP pq q N Np fp fq v