[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： ,A{Bx`o?  
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关键点说几个： n0l|7:Mk  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） :<P4=P P  
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 I]eeV+U8W  
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 hhPQ.{]>  

以下是几个重要的函数： iqR6z\p&  
1.判断点在区域中函数 (m2%7f.I  
2.计算夹角函数 IB# u
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3.转置函数 'df@4}9  
4.得到区域中心点，及区域半径函数 4S'e>:  
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） c{Z "'t7  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 #tZ!D^GQHq  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Z]Xa:[  
   cax = x2 - x1 ?x",VA  
   cay = y2 - y1 fZf>>mu@r'  
   cbx = x2 - x3 #8t=vb3  
   cby = y2 - y3 gtH^'vFZ  
   mo_jj = cax * cbx + cay * cby &c-V QP(  
   mo_ca = Sqr(cax * cax + cay * cay) Po=:-Of:  
   mo_cb = Sqr(cbx * cbx + cby * cby) {s@!N  
   cos_acb = mo_jj / (mo_ca * mo_cb) `Zuo`GP*1  
   'ff_cos = cos_acb m>Wt'Cc  
   If cos_acb >= 1 Then qWK}  
   nn = 0 @{qcu\sZ  
   ElseIf cos_acb <= -1 Then HAE$Np|>a  
   nn = 3.14159265258979 GjEV]hqR  
   Else z}J~X%}e  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) w +UBXW  
   End If 0* x?rO?  
   'ff_angle = nn @;9KP6d  
   ff_angle = nn * 180 / 3.14159265258979 H$?MPA-c  
End Function

'判断点在区域内函数 fATn
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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
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Dim aob, boc, cod, doa, sum As Single I@N/Y{y#  
  If ppx = p1x And ppy = p1y Then U{EcV%C2  
     point_in = True q) 5s'(  
     Exit Function @QJPcF"  
  End If vKoQ!7g  
  If ppx = p2x And ppy = p2y Then dn~k_J=p  
     point_in = True D {E,XOi  
     Exit Function q\P{h ij  
  End If ow (YgM>t  
   If ppx = p3x And ppy = p3y Then
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     point_in = True S5m.oHJI*  
     Exit Function ^,'KmZm=  
  End If p&(z'
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     %j0c|u  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) I&8!V)r)  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) t:.X=/02  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) QWm g#2'  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) "OP$n-*@%  
    sum = aob + boc + cod + doa fCb&$oRr!  
    If 360.01 > sum And sum > 359.99 Then 4nd)*0{f  
       point_in = True h{]0 H'g  
    Else +;@R&Y  
       point_in = False KdlUa^}
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    End If FzsW^u+  
End Function

'得到点半径,得到交点坐标函数 QSYKYgxC  
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() O St~P^1  
    '求得中心点坐标 Hg]iZ,8?  
Dim tt As String noWwX  
Dim rt(3) As Single 0oyZlv*  
    '判断是否平行 jA3Ir;a  
   acx = p3x - p1x a,t]>z95  
   acy = p3y - p1y &C/,~pJ1S  
   bdx = p4x - p2x A{hST~
s  
   bdy = p4y - p2y .GDY J9vi  
   If acx * bdy = acy * bdx Then vf<Tq  
      rt(0) = 0 "X1{*  
      Exit Function <
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   Else )Vy}oFT\  
      '判断斜率存在否 @:u2{>Yl  
      If p1x = p3x And p2x <> p4x Then P

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         tt = "ac_n_bd_y" ]\=M$:,RZ  
      ElseIf p1x <> p3x And p2x = p4x Then V+y:!t`  
         tt = "ac_y_bd_n" @rW%*?$7  
      ElseIf p1x <> p3x And p2x <> p4x Then }PzYt~Z`@  
         tt = "ac_y_bd_y" wdgC{WGl  
      End If _@]@&^K$E  
    Select Case tt `ucr;P  
         Case "ac_n_bd_y" 4d]T`  
            'bd线段方程 j98>Jr\  
            k_bd = bdy / bdx A$'rT|>se  
            b_bd = p2y - k_bd * p2x JA?P jo  
            p_x = p1x %$(*.o!+8  
            p_y = k_bd * p_x + b_bd ~gbq^  
         Case "ac_y_bd_n" @ GzN0yXhR  
            'ac线段方程 '"Dgov$q  
            k_ac = acy / acx ,OO
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            b_ac = p1y - k_ac * p1x TCO^9RP<  
            p_x = p2x I^y,@EHR  
            p_y = k_ac * p_x + b_ac cM+s)4TPL  
        Case "ac_y_bd_y" Z}6H529[  
           'ac，bd线段都要求 $Xo_C_:B  
           k_ac = acy / acx G0$,H(]~  
           b_ac = p1y - k_ac * p1x $30lNZK1m8  
           k_bd = bdy / bdx BBm;QOBU  
           b_bd = p2y - k_bd * p2x \Mod4tQ  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) YR/rN,  
           p_y = k_ac * p_x + b_ac @Nt$B'+S&  
        End Select 9k!#5_ M  
      rt(1) = p_x >/F,Z%!&q  
      rt(2) = p_y bQ2 '*T  
     ur`:wR] 2?  
'计算最大半径 "(#]H;!W  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 1QH5<)Oa  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) e?~6HP^%.  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) E M
Kv)5MH  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) liq9P,(  
Dim bb(5) As Single s5ddGiZnBT  
  bb(1) = rr1 (f|3(u'e?  
  bb(2) = rr2 $q;dsW,8  
  bb(3) = rr3 9ozUg,+Z|J  
  bb(4) = rr4 s4c2  
  nb = rr1 Rm!Iv&{  
For i = 1 To 4 qS|t7*  
    If nb <= bb(i) Then 6muZE1sn  
       nb = bb(i) Gvw:h9v  
    End If $u./%JS  
Next i aYQIe7J90J  
    rt(0) = Sqr(nb) BI-xo}KI  
    rr = rt() .DSmy\FI5  
  End If Mrlv(1PQT  
         jE</a%  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  r5kKNyJ  

S:IhJQ4K  
有热压工艺方面的人才或者资料分享下； iYi3x_A`  
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 |N%?7PZ(  

高手真多！

楼主威武霸气.