[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： #cjB <APY  
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描述:请输入描述

图片:2.jpg

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关键点说几个： BT`/OD@  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） "b -KVZ  
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 @iWIgL  
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 #c?\(qjWA  

以下是几个重要的函数： &x;v&  
1.判断点在区域中函数 nC[L"%E|se  
2.计算夹角函数 $?;aW^E  
3.转置函数 `wk#5[Y_  
4.得到区域中心点，及区域半径函数 2/>AmVM  
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） 7,Z%rqf\)  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 IVEvu3  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single (AR-8  
   cax = x2 - x1 u5T\_0  
   cay = y2 - y1 o+6Y/6Xp@  
   cbx = x2 - x3 183'1Z$KA  
   cby = y2 - y3 inR8m 4c]P  
   mo_jj = cax * cbx + cay * cby T[ky7\  
   mo_ca = Sqr(cax * cax + cay * cay) zjVb+Z\n  
   mo_cb = Sqr(cbx * cbx + cby * cby) YZ/mTQn_D  
   cos_acb = mo_jj / (mo_ca * mo_cb) NaAq^F U  
   'ff_cos = cos_acb ]iPTB  
   If cos_acb >= 1 Then xa!@$w=U&  
   nn = 0 t{x&|%u  
   ElseIf cos_acb <= -1 Then :@YZ6?hf  
   nn = 3.14159265258979 G0a
UZCw  
   Else t
%N#Yh!  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Qv']*C[!z  
   End If
q#MAA_  
   'ff_angle = nn {?eD7xL:-  
   ff_angle = nn * 180 / 3.14159265258979 ]sbu9O ^"f  
End Function

'判断点在区域内函数 W\FKAvS  
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 .B>|>W O  
Dim aob, boc, cod, doa, sum As Single Q:@Y/4=  
  If ppx = p1x And ppy = p1y Then BKVvu}V(o  
     point_in = True sveFxI  
     Exit Function Gvj@?62  
  End If Fda<cS]  
  If ppx = p2x And ppy = p2y Then .8fOc.h8h  
     point_in = True P'Rr5Xa  
     Exit Function J& yDX>  
  End If PP$Ig2Q  
   If ppx = p3x And ppy = p3y Then 'pZ~3q  
     point_in = True !)_5z<  
     Exit Function -/7[_,  
  End If =a7m^e7  
     vT3LhN+1  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ZL
~}B.nqS  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 1gH5#_?  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) c( gUH  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) SLZv`  
    sum = aob + boc + cod + doa !YAkHrF`[0  
    If 360.01 > sum And sum > 359.99 Then
uyAhN  
       point_in = True c|ZZ+2IYd  
    Else x7{,4js  
       point_in = False ZOS{F_2.  
    End If 
,3N8  
End Function

'得到点半径,得到交点坐标函数 L~vNW6#W  
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() (m.]0v*&c  
    '求得中心点坐标 P+
"#xH  
Dim tt As String j-yD;N  
Dim rt(3) As Single !j7b7<wR  
    '判断是否平行 & qd:o}  
   acx = p3x - p1x ;'p0"\SV  
   acy = p3y - p1y xx/DD%IZ  
   bdx = p4x - p2x x-%nnC6e  
   bdy = p4y - p2y Za=<euc7  
   If acx * bdy = acy * bdx Then A$1pMG~as  
      rt(0) = 0 17};I7  
      Exit Function 3OM\R%M  
   Else |wK)(s  
      '判断斜率存在否 \a|gzC1
G  
      If p1x = p3x And p2x <> p4x Then W>1\f0'  
         tt = "ac_n_bd_y" 5|H?L@_9  
      ElseIf p1x <> p3x And p2x = p4x Then (y(V,kXwa8  
         tt = "ac_y_bd_n" !pDS*{)E  
      ElseIf p1x <> p3x And p2x <> p4x Then A.z~wu%(  
         tt = "ac_y_bd_y" #yU4X\oO  
      End If ^Jc~G~x4*  
    Select Case tt Li<c  
         Case "ac_n_bd_y" u6B (f;  
            'bd线段方程 * z{D}L-&  
            k_bd = bdy / bdx <u^41  
            b_bd = p2y - k_bd * p2x li;P,kg$  
            p_x = p1x >n` OLHg;  
            p_y = k_bd * p_x + b_bd R` X$@iM  
         Case "ac_y_bd_n" z{ymVd0#  
            'ac线段方程 Tri.>@-u  
            k_ac = acy / acx I s8|  
            b_ac = p1y - k_ac * p1x YjdH7.js  
            p_x = p2x 4)XN1r:  
            p_y = k_ac * p_x + b_ac A;Zg:  
        Case "ac_y_bd_y" x/9`2X`~  
           'ac，bd线段都要求 Ex@#!fz{%  
           k_ac = acy / acx 2\s-4H| q  
           b_ac = p1y - k_ac * p1x <@zOdW|{:  
           k_bd = bdy / bdx Z?v9ub~%  
           b_bd = p2y - k_bd * p2x 4Y-9W2s  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) wx57dm+  
           p_y = k_ac * p_x + b_ac 071wo7  
        End Select I7[+:?2  
      rt(1) = p_x IE,g  
      rt(2) = p_y u
IWCVR8`Y  
     c)$/Uu  
'计算最大半径 nQ/ha9v=n  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ~&KfJ  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) .#+rH}=Z  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) MJ7!f+!5  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) _$, .NK,6  
Dim bb(5) As Single mBnC]$<R  
  bb(1) = rr1 xDVzHgbf  
  bb(2) = rr2 *Qyw _Q  
  bb(3) = rr3 b[u_r,b  
  bb(4) = rr4 ^ qE4:|e  
  nb = rr1 PHz/^p3F  
For i = 1 To 4 Q2Q`g`*O:  
    If nb <= bb(i) Then 73]%^kx=  
       nb = bb(i) pR~PB  
    End If <rCl  
Next i `T~M:\^D  
    rt(0) = Sqr(nb) %K/rPhU  
    rr = rt() `N|WCiBV.  
  End If {N _v4})  
         t#<q O6&B  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  VgoQz]z  

6`+DBr  
有热压工艺方面的人才或者资料分享下； Jl5<9x  
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 dQ^k-  

高手真多！

楼主威武霸气.