[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： 84'?um  
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关键点说几个： <*
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1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） [T`}yb@  
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 iITp**l  
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 Uki9/QiX>  

以下是几个重要的函数： F>+2DlA`<e  
1.判断点在区域中函数 5)'P'kVi7.  
2.计算夹角函数 5+P@sD  
3.转置函数 Sdd9Dv?!  
4.得到区域中心点，及区域半径函数 \Hwg) Uc{  
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） sG,+  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 l#bAl/c`  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 6^#uLp>  
   cax = x2 - x1 4;KWG}~[o  
   cay = y2 - y1 ZPO|<uR  
   cbx = x2 - x3 4nkE IZ  
   cby = y2 - y3 R$m`Z+/@  
   mo_jj = cax * cbx + cay * cby $/_qE  
   mo_ca = Sqr(cax * cax + cay * cay) .Q&rfH3  
   mo_cb = Sqr(cbx * cbx + cby * cby) LJQJ\bT?  
   cos_acb = mo_jj / (mo_ca * mo_cb) (j&A",^^S  
   'ff_cos = cos_acb V 0{tap}  
   If cos_acb >= 1 Then Yck~xt&]  
   nn = 0 g4&jo_3:p  
   ElseIf cos_acb <= -1 Then <]G${
y*;  
   nn = 3.14159265258979 u&]vd /  
   Else $%2H6Eg0  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) @5<CXTdF9c  
   End If SH8/0g?  
   'ff_angle = nn fgF;&(b  
   ff_angle = nn * 180 / 3.14159265258979 .px:e)iW  
End Function

'判断点在区域内函数 Qv#]81i(1  
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 >q7 %UK]&  
Dim aob, boc, cod, doa, sum As Single 3Wx,oq;4-  
  If ppx = p1x And ppy = p1y Then 3qMNl>>  
     point_in = True c[cAUsk i  
     Exit Function 7#2j>G{?]v  
  End If UG[e//m  
  If ppx = p2x And ppy = p2y Then or?%-)  
     point_in = True BWUq%o,@g  
     Exit Function JlZ0n;  
  End If <{ru|-9  
   If ppx = p3x And ppy = p3y Then F^kwdS  
     point_in = True svhrf;3:  
     Exit Function (f1M'w/OD  
  End If U/w.M_S  
     \
2X$C#8E  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) H\G{
3.T.9  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) fCUT[d+H  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) [CN$ScK,  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ,M6ZZ* ,e  
    sum = aob + boc + cod + doa ($!KzxF3  
    If 360.01 > sum And sum > 359.99 Then %mI~ =^za  
       point_in = True *\XH+/]+  
    Else %c/^_.  
       point_in = False d;G~hVu  
    End If ?nFO:N<  
End Function

'得到点半径,得到交点坐标函数 }NmNanW^  
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() -|_ir-j  
    '求得中心点坐标 eti`O  
Dim tt As String kU*{4G|6  
Dim rt(3) As Single <Gb %uny  
    '判断是否平行 oRY!\ADR  
   acx = p3x - p1x QGPw
2Q  
   acy = p3y - p1y fEnQE EU~P  
   bdx = p4x - p2x c{3rl;Cs  
   bdy = p4y - p2y _PXdzeI.  
   If acx * bdy = acy * bdx Then G*n2Ii  
      rt(0) = 0 _ Jc2&(;  
      Exit Function <$Yi]ty  
   Else Np,2j KF(  
      '判断斜率存在否 cvo[s, p  
      If p1x = p3x And p2x <> p4x Then =nxKttmU0  
         tt = "ac_n_bd_y" Z`_.x &Y  
      ElseIf p1x <> p3x And p2x = p4x Then {BV4h%P]:  
         tt = "ac_y_bd_n" {=JF=8@A  
      ElseIf p1x <> p3x And p2x <> p4x Then Ill[]O  
         tt = "ac_y_bd_y" p+w8$8)  
      End If Fwfo2  
    Select Case tt  v[,Src  
         Case "ac_n_bd_y" X;GfPw.m  
            'bd线段方程 i@$*Csj\9*  
            k_bd = bdy / bdx F:T GsV#  
            b_bd = p2y - k_bd * p2x %u!XzdG  
            p_x = p1x r/r:o
XK  
            p_y = k_bd * p_x + b_bd 0!#;j{JQ  
         Case "ac_y_bd_n" !{%G0(Dv  
            'ac线段方程 4<v;1   
            k_ac = acy / acx ijYvqZ_  
            b_ac = p1y - k_ac * p1x vq6%Ey3Gix  
            p_x = p2x 1:NS}r+>3.  
            p_y = k_ac * p_x + b_ac fE;Q:# Z.  
        Case "ac_y_bd_y" `/:
cfP\  
           'ac，bd线段都要求 D3]BTkMMS;  
           k_ac = acy / acx &O1v,$}'  
           b_ac = p1y - k_ac * p1x 2@i;_
3sv  
           k_bd = bdy / bdx +x1/-J8_sg  
           b_bd = p2y - k_bd * p2x q)I|2~Q c^  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) eBcJm  
           p_y = k_ac * p_x + b_ac w]!0<  
        End Select ~"dhu]^  
      rt(1) = p_x #gv4  
      rt(2) = p_y %_f;G+fK\p  
     {d!Y3+I%G  
'计算最大半径 );JJ2Jlkd  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ")`S0n5e  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) bhg}-dto  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) =>LZm+P  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 5 2Hqu>  
Dim bb(5) As Single |f' 8p8J  
  bb(1) = rr1 S@}4-\  
  bb(2) = rr2 z+VV}:Q  
  bb(3) = rr3 n[" 9|  
  bb(4) = rr4 _l&ucA
 
  nb = rr1 P_Uutn~  
For i = 1 To 4 ?2`$3[ET-  
    If nb <= bb(i) Then ZKdh%8C  
       nb = bb(i) ; B$*)X9  
    End If &3DK^|Lq  
Next i dOXD{c  
    rt(0) = Sqr(nb) >BoSw&T$Q  
    rr = rt() .Q\\dESn"  
  End If '2v f|CX  
         Tov&68A~e  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ]+,nA R  

*NjMb{[ZQ  
有热压工艺方面的人才或者资料分享下； SyB-iQ
n  
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 ee\Gl?VN  

高手真多！

楼主威武霸气.