[分享]绝对随机网点分布（excel之vba） [复制链接]

想学习的请研究下，直接给程序就没意思了，由于公司想做一套导光板的模具，没有现成的软件可用，就自己做了较简单的程序，虽然简单，但基本功能已经满足了导光板网点设计的要求；具备功能：任意多边形区域；含有光轴，且可以根据光源调整；网点密度可沿光轴方向调整，效果图如下： fx4#R(N  
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关键点说几个： \I/"W#\SJo  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ]TUoXU2<x  
2.需要定义光轴的方向；简便的方法就是指定光源坐标，及网点区域坐标，这样光轴就确定了 1:M'|uc  
3.网点区域密度可调；把区域分成若干小块，每块的密度不同即可 =h=-&DSA  

以下是几个重要的函数： U8HuqFC  
1.判断点在区域中函数 Wnp[8IEU  
2.计算夹角函数 4AvIU!0w  
3.转置函数 0R+p\Nc&1  
4.得到区域中心点，及区域半径函数 E5|GP  
5.再有就是若干个点抽取其中一部分；或者采用随机分布（该方法会有重合点，所以没采用） qh&KNJ>1  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 $(OL#>9Ly  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single zH~g5xgh  
   cax = x2 - x1 @^-f+o  
   cay = y2 - y1 )liNjY@  
   cbx = x2 - x3 |\"%Dy[m  
   cby = y2 - y3 K&dc< 4DC  
   mo_jj = cax * cbx + cay * cby 4 BNbS|?vV  
   mo_ca = Sqr(cax * cax + cay * cay) eCg|@d%D  
   mo_cb = Sqr(cbx * cbx + cby * cby) eUgKwu;  
   cos_acb = mo_jj / (mo_ca * mo_cb) 6 {3ql:  
   'ff_cos = cos_acb eSMno_Gt3  
   If cos_acb >= 1 Then LA6Ik_-F  
   nn = 0 HC>k/Gk"  
   ElseIf cos_acb <= -1 Then *_Pkb
.3R  
   nn = 3.14159265258979 mryT%zSlM  
   Else (15.?9  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) +K;%sAZy  
   End If oK"#*n  
   'ff_angle = nn Q2@yUDd!  
   ff_angle = nn * 180 / 3.14159265258979 :4"b(L  
End Function

'判断点在区域内函数 ^c sOXP=Yp  
Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean 3[m~6Ys  
Dim aob, boc, cod, doa, sum As Single _
9iF`Q  
  If ppx = p1x And ppy = p1y Then HNfd[#gV  
     point_in = True 4&`d$K  
     Exit Function gkx<<)y l  
  End If Y3'dV)  
  If ppx = p2x And ppy = p2y Then +2s][^-KV  
     point_in = True 6". v6  
     Exit Function 9v}vCg  
  End If h&bs`  
   If ppx = p3x And ppy = p3y Then 6~8dMy;w  
     point_in = True !t&C,@Ox  
     Exit Function <L3ig%#B  
  End If twPD'X!r  
     6wy
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L-{:  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) _#o75*42tT  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) -kzg(+sm  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) FWyfFCK  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 45Q#6BtE  
    sum = aob + boc + cod + doa G0x!
:[  
    If 360.01 > sum And sum > 359.99 Then #j"N5e}U  
       point_in = True v
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    Else -$y/*'  
       point_in = False kmsgaB7?  
    End If DEpn>   
End Function

'得到点半径,得到交点坐标函数 &vS@-K  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() `[.4SIah  
    '求得中心点坐标 #TY[\$BHs  
Dim tt As String n0'"/zyc  
Dim rt(3) As Single s!K9-qZl<  
    '判断是否平行 ~^"s.Lsb  
   acx = p3x - p1x TZ@S?r>^  
   acy = p3y - p1y ^9*Jz{e  
   bdx = p4x - p2x .?-]+-J?`  
   bdy = p4y - p2y ]Y6y ]u  
   If acx * bdy = acy * bdx Then 7 [?]DyOf  
      rt(0) = 0 I-|1eR+3  
      Exit Function QU^?a~r  
   Else Zk 9i}H  
      '判断斜率存在否 hk+"c^g:j<  
      If p1x = p3x And p2x <> p4x Then 'fY( Vm  
         tt = "ac_n_bd_y" UNKXfe(X9  
      ElseIf p1x <> p3x And p2x = p4x Then JAcNjzL  
         tt = "ac_y_bd_n" q#1CmKt4R  
      ElseIf p1x <> p3x And p2x <> p4x Then FKu^{'Y6E0  
         tt = "ac_y_bd_y" }q[IhjD%  
      End If V']
1j  
    Select Case tt cP(is!  
         Case "ac_n_bd_y" l(
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            'bd线段方程 u1i ?L'  
            k_bd = bdy / bdx &$E.rgtg  
            b_bd = p2y - k_bd * p2x BZWGXzOFh  
            p_x = p1x _^u^@.Q'i<  
            p_y = k_bd * p_x + b_bd Y^J/jA0\B  
         Case "ac_y_bd_n" W&Gt^5  
            'ac线段方程 dRnO5 7+{  
            k_ac = acy / acx \jThbCb  
            b_ac = p1y - k_ac * p1x 91j.%#[v'  
            p_x = p2x k8ej.  
            p_y = k_ac * p_x + b_ac ( G#W6  
        Case "ac_y_bd_y" XYsU)(;j  
           'ac，bd线段都要求 %W]"
JwRu  
           k_ac = acy / acx QDJ:LJz\  
           b_ac = p1y - k_ac * p1x $79-)4;z4  
           k_bd = bdy / bdx _i+7O^=d6X  
           b_bd = p2y - k_bd * p2x - -H%FYF`  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ,Taq~  
           p_y = k_ac * p_x + b_ac l>:\% ol  
        End Select Cu+u'&U!  
      rt(1) = p_x p*S;4+>#  
      rt(2) = p_y :yC|Q)  
     07tSXl5!  
'计算最大半径 0}y-DCuQ  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y)
Hg;;>  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ?e+$?8l[3  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) /0I=?+QSo  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ZRo-=/1  
Dim bb(5) As Single maTZNzy  
  bb(1) = rr1 u9R:2ah&K  
  bb(2) = rr2 b9@VD)J0E  
  bb(3) = rr3 bv8GJ #  
  bb(4) = rr4 X-=J7G`\h#  
  nb = rr1 QHuh=7u)  
For i = 1 To 4
f$^+;j  
    If nb <= bb(i) Then v"a.%"oN8  
       nb = bb(i) _ 0Ced&i  
    End If !2Q>  
Next i v\?J$Hdd  
    rt(0) = Sqr(nb) ;0`p"T0  
    rr = rt() L=WB'*N  
  End If koAM",5D  
         fnm:Wa|,%|  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  [i'\d}  

Z0~}'K   
有热压工艺方面的人才或者资料分享下； LQMVC^G  
我公司主要做透镜类产品，现在有客户要审核我公司的导光膜工艺，头疼 swDSV1alMB  

高手真多！

楼主威武霸气.