24小时热门版块排行榜

返回列表

pakchoi1987

新虫 (初入文坛)

应助: 0 (幼儿园)
金币: 33.3
帖子: 12
在线: 14小时
虫号: 2182152
注册: 2012-12-12
专业: 机械结构强度学

[求助] 保存成eps矢量图时出现问题

画的NURBS基函数，为什么输出eps格式时在分段区间边界处显示过于间断（理论上是间断的，但是输出到图片也太明显了，见下图）？如果输出位图而且取样点较多就不明显（如果x取点较少也会有间断，）程序代码如下，求大神帮忙

%!test
n = 6;
U = [0 0 0 1/8 5/8 6/8 1 1 1];
p = 2;
u = linspace (0, 1, 1000);
s = findspan (n, p, u, U);
Bref = [1.00000 0.00000 0.00000
      0.60494 0.37037 0.02469
      0.30864 0.59259 0.09877
      0.11111 0.66667 0.22222
      0.01235 0.59259 0.39506
      0.39506 0.59259 0.01235
      0.22222 0.66667 0.11111
      0.09877 0.59259 0.30864
      0.02469 0.37037 0.60494
      0.00000 0.00000 1.00000];
  B = basisfun (s, u, p, U);

  B1(:,1) = u';
  B1(:,2) = B(:,1);
  B2(:,1) = u';
  B2(:,2) = B(:,2);
  B3(:,1) = u';
  B3(:,2) = B(:,3);


  k11 = 1;
  k12 = 1;
  k13 = 1;
  k14 = 1;
  k21 = 1;
  k22 = 1;
  k23 = 1;
  k24 = 1;
  k31 = 1;
  k32 = 1;
  k33 = 1;
  k34 = 1;

%分段画出，共4段（0~1/4;1/4~2/4;2/4~3/4;3/4~1）
  nmax = size(B,1);
for i = 1:nmax
  if (B1(i,1)>=0&&B1(i,1)<=1/8)
   B11(k11,:) = B1(i,:);
   k11=k11+1;
  elseif(B1(i,1)>=1/8&&B1(i,1)<=5/8)
   B12(k12,:) = B1(i,:);
   k12=k12+1;
  elseif(B1(i,1)>=5/8&&B1(i,1)<=6/8)
   B13(k13,:) = B1(i,:);
   k13=k13+1;
  elseif(B1(i,1)>=6/8&&B1(i,1)<=1)
   B14(k14,:) = B1(i,:);
   k14=k14+1;
  end

  if (B2(i,1)>=0&&B2(i,1)<=1/8)
   B21(k21,:) = B2(i,:);
   k21=k21+1;
  elseif(B2(i,1)>=1/8&&B2(i,1)<=5/8)
   B22(k22,:) = B2(i,:);
   k22=k22+1;
  elseif(B2(i,1)>=5/8&&B2(i,1)<=6/8)
   B23(k23,:) = B2(i,:);
   k23=k23+1;
  elseif(B2(i,1)>=6/8&&B2(i,1)<=1)
   B24(k24,:) = B2(i,:);
   k24=k24+1;
  end

  if (B3(i,1)>=0&&B3(i,1)<=1/8)
   B31(k31,:) = B3(i,:);
   k31=k31+1;
  elseif(B3(i,1)>=1/8&&B3(i,1)<=5/8)
   B32(k32,:) = B3(i,:);
   k32=k32+1;
  elseif(B3(i,1)>=5/8&&B3(i,1)<=6/8)
   B33(k33,:) = B3(i,:);
   k33=k33+1;
  elseif(B3(i,1)>=6/8&&B3(i,1)<=1)
   B34(k34,:) = B3(i,:);
   k34=k34+1;
  end
end

plot(B11(:,1),B11(:,2),B12(:,1),B12(:,2),B13(:,1),B13(:,2),B14(:,1),B14(:,2),B21(:,1),B21(:,2),B22(:,1),B22(:,2),B23(:,1),B23(:,2),B24(:,1),B24(:,2),B31(:,1),B31(:,2),B32(:,1),B32(:,2),B33(:,1),B33(:,2),B34(:,1),B34(:,2))

2014-3-28 10-59-55.jpg

回复此楼