[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： EV$n>.  
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关键点说几个： 2O/_hv.  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） +6atbbe}  
2.需要定义光轴的方向；简便的方法就是指定光源坐标，及网点区域坐标，这样光轴就确定了 qC1@p?8$  
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 ]9Hy "#Fz  

以下是几个重要的函数： $!Tw`O
 
1.判断点在区域中函数 }__+[-  
2.计算夹角函数 E12k1gC`  
3.转置函数 T^_9R;  
4.得到区域中心点，及区域半径函数 ZI7<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） se[};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 eAMT72_  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single `Nj|}^A  
   cax = x2 - x1 _q 8m$4  
   cay = y2 - y1 n>WS@b/o  
   cbx = x2 - x3 ~ 4aaJ0  
   cby = y2 - y3 YbKW;L&Ff  
   mo_jj = cax * cbx + cay * cby .FUEF)  
   mo_ca = Sqr(cax * cax + cay * cay) ioggD  
   mo_cb = Sqr(cbx * cbx + cby * cby) |Bp?"8%*l  
   cos_acb = mo_jj / (mo_ca * mo_cb) 9\F^\h{  
   'ff_cos = cos_acb -g0>>{M'  
   If cos_acb >= 1 Then !r<7]nwV  
   nn = 0 ]NCOi?Odx  
   ElseIf cos_acb <= -1 Then art{PV
4-  
   nn = 3.14159265258979 }MNm>3  
   Else *D,T}N  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) #_d%hr~d  
   End If L6m'u6:1{  
   'ff_angle = nn qb Q> z+c  
   ff_angle = nn * 180 / 3.14159265258979 'g#GUSXfj  
End Function

'判断点在区域内函数 $[Fk>d  
Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean r$KDNa$/a  
Dim aob, boc, cod, doa, sum As Single /SiQw7yp%  
  If ppx = p1x And ppy = p1y Then yC[}gHv  
     point_in = True gnQd#`  
     Exit Function 9g7T~|P  
  End If  Dg@6o  
  If ppx = p2x And ppy = p2y Then /=N`P &R#  
     point_in = True 'Gk|&^  
     Exit Function 7$'ja  
  End If @bZb#,n]  
   If ppx = p3x And ppy = p3y Then fc91D]c  
     point_in = True wNlp4Z'[  
     Exit Function }sFHb[I &  
  End If 1WU-gQki!  
     i|t$sBIh  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) %]-tA,
u  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) *d=pK*g  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) wegBMRQVp  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ?1YK
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    sum = aob + boc + cod + doa 9I,Trk@&  
    If 360.01 > sum And sum > 359.99 Then 8g3 6-8  
       point_in = True W|:WAxJ*d  
    Else K&/W cuP&  
       point_in = False y=t -
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    End If k@?<Aw8_X  
End Function

'得到点半径,得到交点坐标函数 3oh(d.Z  
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() TV}H  
    '求得中心点坐标 L!\I>a5C0G  
Dim tt As String 8{AzB8xp  
Dim rt(3) As Single ).\%a h  
    '判断是否平行 =cxjb,r  
   acx = p3x - p1x @>:r'Fmu-  
   acy = p3y - p1y =oBV.BST u  
   bdx = p4x - p2x V[#jrwhA  
   bdy = p4y - p2y YtFtU;{  
   If acx * bdy = acy * bdx Then yovC~  
      rt(0) = 0 [j):2  
      Exit Function _di[P
U=Vh  
   Else \]zHM.E1  
      '判断斜率存在否 $. Ih-  
      If p1x = p3x And p2x <> p4x Then V V<Zl  
         tt = "ac_n_bd_y" 'Je;3"@  
      ElseIf p1x <> p3x And p2x = p4x Then rAgb<D@,H  
         tt = "ac_y_bd_n" Wh,p$|vL  
      ElseIf p1x <> p3x And p2x <> p4x Then H?PaN)_6-+  
         tt = "ac_y_bd_y" @,
$>H7o  
      End If opd^|xx0  
    Select Case tt ->d3FR  
         Case "ac_n_bd_y" Mp}U>+
8  
            'bd线段方程 s$A|>TOY  
            k_bd = bdy / bdx [:Sl^ Z&6M  
            b_bd = p2y - k_bd * p2x :M3Fq@w=  
            p_x = p1x (m13 ong  
            p_y = k_bd * p_x + b_bd n}EH{k9#  
         Case "ac_y_bd_n" *4]}_ .rG#  
            'ac线段方程 nPE{Gp) }  
            k_ac = acy / acx fT
Mn  
            b_ac = p1y - k_ac * p1x nwf(`=TC  
            p_x = p2x XsEDI?p2  
            p_y = k_ac * p_x + b_ac U`z=!KI+g  
        Case "ac_y_bd_y" 51xiX90D  
           'ac，bd线段都要求 U&GSMjqg  
           k_ac = acy / acx p[>!;qI  
           b_ac = p1y - k_ac * p1x f<<1.4)oSV  
           k_bd = bdy / bdx H>X:#xOA_  
           b_bd = p2y - k_bd * p2x vr"O9L w  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) xQ%N% `  
           p_y = k_ac * p_x + b_ac !#3v<_]#d  
        End Select |cs]98FEf  
      rt(1) = p_x EN^5Hppb  
      rt(2) = p_y 1N,</<"  
     :pq+SifP  
'计算最大半径 8u6*;*o  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) MaN6bM  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ~7ZWtg;B  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ew?4;  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) yvv]iRk<  
Dim bb(5) As Single 6/6M.
p  
  bb(1) = rr1 f}=>c|Do  
  bb(2) = rr2 E%LUJx}  
  bb(3) = rr3 }]<0!q &xB  
  bb(4) = rr4 A`71LV%  
  nb = rr1 I'}&s|6  
For i = 1 To 4 !Ah v07SI  
    If nb <= bb(i) Then gamE^Ee  
       nb = bb(i) ?fW['%  
    End If -!q^/ux  
Next i VkFMr8@|  
    rt(0) = Sqr(nb) >e>%AMzo[  
    rr = rt() w{mw?0  
  End If Y \Gx|  
         gWQ(
B  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  yUj`vu2  

UAPd["`)y  
有热压工艺方面的人才或者资料分享下； k:I,$"y4  
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 +q'\rpt  

高手真多！

楼主威武霸气.