[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： & *&  
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关键点说几个： ~_SVQ7P  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） &sPu3.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 QjUojHz%Z  
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 $%J$  

以下是几个重要的函数： t!vlZNc  
1.判断点在区域中函数 D61e  
2.计算夹角函数 vro5G')  
3.转置函数 }\\6"90g*  
4.得到区域中心点，及区域半径函数 r;aP`MVO<  
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） i(>v~T,(  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Y_Lsmq2!  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 6ypqnOTr  
   cax = x2 - x1 ui6B  
   cay = y2 - y1 V/-~L]G  
   cbx = x2 - x3 }tT*Ch?u  
   cby = y2 - y3 *:A)j?(  
   mo_jj = cax * cbx + cay * cby QWGFXy,=1  
   mo_ca = Sqr(cax * cax + cay * cay) "ae55ft//  
   mo_cb = Sqr(cbx * cbx + cby * cby) %z0@4Gq  
   cos_acb = mo_jj / (mo_ca * mo_cb) +nslS:(  
   'ff_cos = cos_acb aw:0R=S,>  
   If cos_acb >= 1 Then $/(H%f&  
   nn = 0 Qmh*Gh?v  
   ElseIf cos_acb <= -1 Then KPA5 X]  
   nn = 3.14159265258979 YB}_zuZ4&  
   Else cBA2;5E  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) way-Q7  
   End If 1P\_3.V{  
   'ff_angle = nn DDhc^(  
   ff_angle = nn * 180 / 3.14159265258979 {#y HL  
End Function

'判断点在区域内函数 2h6F j&  
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 <`9:hPp0  
Dim aob, boc, cod, doa, sum As Single #zt+U^#)  
  If ppx = p1x And ppy = p1y Then \ca4X{x  
     point_in = True h OboM3_  
     Exit Function U%45qCU  
  End If yK&)H+v  
  If ppx = p2x And ppy = p2y Then 2s6Hr;^w.1  
     point_in = True 8YN+
\  
     Exit Function +o/;bm*U<K  
  End If I$wP`gQh
 
   If ppx = p3x And ppy = p3y Then 1.H"$D>TC  
     point_in = True ]yVB6
6l  
     Exit Function m|"MJP  
  End If N]yk<55  
     9AL\6@<a*  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) n5]<|>Uvx  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 3P6!j
  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) g%=\Wiit]  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ._tv$Gd@k  
    sum = aob + boc + cod + doa a4: PufS  
    If 360.01 > sum And sum > 359.99 Then :WCUHQ+  
       point_in = True m9xu$z|e  
    Else s_Dl8O4u  
       point_in = False I( y Wct  
    End If Hab9~v ]  
End Function

'得到点半径,得到交点坐标函数 0`ib_&yI  
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() t583Q/1@  
    '求得中心点坐标 FUcs=7c  
Dim tt As String Jc%>=`f  
Dim rt(3) As Single ;Ok11wOw  
    '判断是否平行 DU7Ki6  
   acx = p3x - p1x x)*/3[  
   acy = p3y - p1y -owfuS?i=  
   bdx = p4x - p2x ;5%&q6&a  
   bdy = p4y - p2y %mYIXsuH  
   If acx * bdy = acy * bdx Then YHRI UYd  
      rt(0) = 0 462ae` 6l  
      Exit Function 2\5@_U^
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   Else <zDe;&  
      '判断斜率存在否 }.gg!V'9w  
      If p1x = p3x And p2x <> p4x Then  7:p]~eM)  
         tt = "ac_n_bd_y" TwhK>HN  
      ElseIf p1x <> p3x And p2x = p4x Then z vYDE]  
         tt = "ac_y_bd_n" $cy:G  
      ElseIf p1x <> p3x And p2x <> p4x Then */+s^{W7  
         tt = "ac_y_bd_y" e-K8K+7  
      End If f%}+.e
D  
    Select Case tt +|8Lt[^ux  
         Case "ac_n_bd_y" BxT~1SBFq  
            'bd线段方程 IGqmH=-  
            k_bd = bdy / bdx %8{_;-f  
            b_bd = p2y - k_bd * p2x yR$_$N+E  
            p_x = p1x 7lj-Z~1  
            p_y = k_bd * p_x + b_bd &+^ # `nq  
         Case "ac_y_bd_n" y-X'eCUz  
            'ac线段方程 i-=ff  
            k_ac = acy / acx LK%B6-;~-  
            b_ac = p1y - k_ac * p1x ?7p| F^  
            p_x = p2x k2WO*xa*  
            p_y = k_ac * p_x + b_ac \9?<E[  
        Case "ac_y_bd_y" G
JuD :  
           'ac，bd线段都要求 @ixX?N)V  
           k_ac = acy / acx ).boe& .  
           b_ac = p1y - k_ac * p1x KN`z68c4
L  
           k_bd = bdy / bdx <EUSl|6  
           b_bd = p2y - k_bd * p2x 

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           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ,Df36-74v5  
           p_y = k_ac * p_x + b_ac :58'U|
 
        End Select bOdv]nQ1  
      rt(1) = p_x (qP$I:Q4]v  
      rt(2) = p_y (j I|F-i  
     *u>\&`h=  
'计算最大半径 prs<ZxbQb  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) dtBV0$  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) (R}X(u  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) W9Lg}[>:)  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) j)DZmGg&t  
Dim bb(5) As Single UmE{>5Pt  
  bb(1) = rr1 #]N9/Hij#g  
  bb(2) = rr2 }\{1`$*~  
  bb(3) = rr3 @[RY8~  
  bb(4) = rr4 -}sya1(<8  
  nb = rr1 %Eh%mMb^  
For i = 1 To 4 *4:/<wI!  
    If nb <= bb(i) Then mwCnP8:K  
       nb = bb(i) Y fA\#N0;3  
    End If c]r|I%D  
Next i L _y|l5  
    rt(0) = Sqr(nb) b . j^US^  
    rr = rt() TjK5UML  
  End If SkA'+(  
         $?-o  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  }R&5qpl  

?g;ZbD  
有热压工艺方面的人才或者资料分享下； o$`kpr  
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 jJ"EGFa8  

高手真多！

楼主威武霸气.