[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： UGO#o`.G}  
Tvx1+0Z%z  

描述:请输入描述

图片:2.jpg

T?7u [D[[  

关键点说几个： XO <0;9|  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） c]^P$F8U  
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 9+@h2"|N4*  
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  
QHNyH  

以下是几个重要的函数： `s7pM  
1.判断点在区域中函数 Tdi^P}i_  
2.计算夹角函数 \FsA-W\X  
3.转置函数 N68mvBe  
4.得到区域中心点，及区域半径函数 GLf!i1Z  
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） $*0-+h  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 WoT
eIkM9  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single &>\;4E.O5  
   cax = x2 - x1 So1
TH%  
   cay = y2 - y1 Q a (Sb  
   cbx = x2 - x3 roQI;gq^  
   cby = y2 - y3 oP,*H6)i  
   mo_jj = cax * cbx + cay * cby ,`Hwe
Iq(  
   mo_ca = Sqr(cax * cax + cay * cay) 4A2}3$c9  
   mo_cb = Sqr(cbx * cbx + cby * cby) #tV1?q  
   cos_acb = mo_jj / (mo_ca * mo_cb) z x-[@G  
   'ff_cos = cos_acb lUu0AZQmG  
   If cos_acb >= 1 Then u}%OC43  
   nn = 0 w % Hj'  
   ElseIf cos_acb <= -1 Then j-K[]$  
   nn = 3.14159265258979 :BPgDLL,  
   Else ogFo/TKM  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 4t[7lL`Z  
   End If ?,pwYT0g  
   'ff_angle = nn XM:BMd|  
   ff_angle = nn * 180 / 3.14159265258979 :H&Q!\a  
End Function

'判断点在区域内函数 DSLX/uo1  
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 |Y!^E %*  
Dim aob, boc, cod, doa, sum As Single 0
T`Qoo>u  
  If ppx = p1x And ppy = p1y Then Z|_V ;*  
     point_in = True 3 `_/h' ~  
     Exit Function 8w:ay,=  
  End If J&aN6l?  
  If ppx = p2x And ppy = p2y Then @(#vg\UH  
     point_in = True ZjxF@`H  
     Exit Function "pDU v^ie  
  End If Ic&~iqQ  
   If ppx = p3x And ppy = p3y Then #2^0z`-\_z  
     point_in = True Pn9".  
     Exit Function "e-Y?_S7R8  
  End If v\w*VCjoV  
     XNa{_3v  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) |cC3L09  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ~3s?.[}d  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ]+e zg(C}  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ZRjM^ d;  
    sum = aob + boc + cod + doa ,[ 2N3iH  
    If 360.01 > sum And sum > 359.99 Then !P
Ig,  
       point_in = True QDxs+<#  
    Else yq.@-]ytZ  
       point_in = False ZW;Ec+n_K  
    End If L!JC)p.  
End Function

'得到点半径,得到交点坐标函数 kt Z~r. +  
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() G9xl-ag+z  
    '求得中心点坐标
%(s|  
Dim tt As String _*}D@yy&  
Dim rt(3) As Single +_ehzo97  
    '判断是否平行 Yjo$vQi  
   acx = p3x - p1x UK OhsE  
   acy = p3y - p1y T}\
>8EEG  
   bdx = p4x - p2x =0&XdxX  
   bdy = p4y - p2y ecm+33C  
   If acx * bdy = acy * bdx Then BUZ74  
      rt(0) = 0 $Ud9v4  
      Exit Function 53/$8=  
   Else jA8Bmwt;w  
      '判断斜率存在否 mmwc'-jU:  
      If p1x = p3x And p2x <> p4x Then ;|T|*0vY[  
         tt = "ac_n_bd_y" +Q"s!\5  
      ElseIf p1x <> p3x And p2x = p4x Then R)d_0Ng  
         tt = "ac_y_bd_n" \>su97  
      ElseIf p1x <> p3x And p2x <> p4x Then !rgXB(  
         tt = "ac_y_bd_y" v$`3}<3-  
      End If "viZ"/~6  
    Select Case tt =l2 @'YQ  
         Case "ac_n_bd_y" )%/ Ni^  
            'bd线段方程 %D-!<)z  
            k_bd = bdy / bdx
`!N.1RP _  
            b_bd = p2y - k_bd * p2x '3^_:E5y  
            p_x = p1x Y".?j5f?  
            p_y = k_bd * p_x + b_bd ?/}IDwuh  
         Case "ac_y_bd_n" 0<A*I{,4L  
            'ac线段方程 H1~9f{
 
            k_ac = acy / acx 'n{=`e(}cI  
            b_ac = p1y - k_ac * p1x s4 ,`  
            p_x = p2x ZLaht(`+  
            p_y = k_ac * p_x + b_ac  Dt5AG  
        Case "ac_y_bd_y" Nba1!5:M  
           'ac，bd线段都要求 0dx%b677d  
           k_ac = acy / acx  pb<eg,  
           b_ac = p1y - k_ac * p1x S]E|a@kD3  
           k_bd = bdy / bdx ^Gbcs l~Gj  
           b_bd = p2y - k_bd * p2x Hv"qRuQ?[  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) y[f%0*\B  
           p_y = k_ac * p_x + b_ac xxGQXW  
        End Select *W=1yPP  
      rt(1) = p_x Oxu}W%BF*  
      rt(2) = p_y &iuMB0rbu  
     -iy17$  
'计算最大半径 ! .Pbbs%  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ER`;0#3[9u  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 9-#=xE9'U  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Yh,,(V6  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 9u^za!pE  
Dim bb(5) As Single 5[6{
o$I  
  bb(1) = rr1 J{;\TNkJ  
  bb(2) = rr2 Ng&K5Z/  
  bb(3) = rr3 1A]  
  bb(4) = rr4 s7`2ky()kz  
  nb = rr1 u<\Sf"fs  
For i = 1 To 4 \= 6dF,V  
    If nb <= bb(i) Then 3cqc<  
       nb = bb(i) o|KmKC n>  
    End If dpdp0  
Next i  fs
KZ  
    rt(0) = Sqr(nb) !':y8(Ou  
    rr = rt() ^6UE/4x!y  
  End If )x,-O#"A  
         R-Tf9?)  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  F@@6D0\X?  

2u^/yl  
有热压工艺方面的人才或者资料分享下； 6tT*b@/_o  
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 qa)Qf,`  

高手真多！

楼主威武霸气.