[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： e4?>-  
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描述:请输入描述

图片:2.jpg

t/VD31  

关键点说几个： c;Pe/d  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ILEz;D{]  
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 k_ & :24Lj  
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 49GkPy#]L=  

以下是几个重要的函数： We$:&K0  
1.判断点在区域中函数 *|%@6I(  
2.计算夹角函数 ORe(]I`Z  
3.转置函数 $PTP/^  
4.得到区域中心点，及区域半径函数 l{I6&^!KS  
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） ^1iSn)&  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 $$|rrG  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single {MtpkUN  
   cax = x2 - x1 U`R5'Tf;  
   cay = y2 - y1 wvO|UP H\  
   cbx = x2 - x3 ciBP7>'::  
   cby = y2 - y3 Ixb=L(V  
   mo_jj = cax * cbx + cay * cby [Y|8\Ph`&  
   mo_ca = Sqr(cax * cax + cay * cay) 0h#lJS*  
   mo_cb = Sqr(cbx * cbx + cby * cby) sy:[T T!w  
   cos_acb = mo_jj / (mo_ca * mo_cb) Oft-w)cYz,  
   'ff_cos = cos_acb v\KA'PmiP  
   If cos_acb >= 1 Then hL/)|N~  
   nn = 0 zKw`Md  
   ElseIf cos_acb <= -1 Then wQqb`l7+  
   nn = 3.14159265258979 Yw4n-0g  
   Else aoM
qSwF=  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) UtPLIal  
   End If \Jx04[=  
   'ff_angle = nn  aC$B2
  
   ff_angle = nn * 180 / 3.14159265258979 m? eiIrMW  
End Function

'判断点在区域内函数 iP =V8g?L  
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 vMA]j>>  
Dim aob, boc, cod, doa, sum As Single Sh/T,  
  If ppx = p1x And ppy = p1y Then 8J:}%DaxL  
     point_in = True =d".|k  
     Exit Function &M46&^Jho  
  End If M9!HQ   
  If ppx = p2x And ppy = p2y Then C<NLE-  
     point_in = True 6g|*`x{  
     Exit Function )Q1"\\2j0  
  End If n"c)m%yZ  
   If ppx = p3x And ppy = p3y Then T=iJGRctB  
     point_in = True DnC{YK  
     Exit Function =Q+;=-1  
  End If wG~`[>y (  
     =y [M\m  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Z'4./  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) H<VTa? n  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) {9?
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    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) wb]%m1H`:  
    sum = aob + boc + cod + doa _Tf4WFu2  
    If 360.01 > sum And sum > 359.99 Then BUWqIdg  
       point_in = True <oR a3Gi(%  
    Else /35R u}c  
       point_in = False 0rOfrTNOz%  
    End If igIRSN}h  
End Function

'得到点半径,得到交点坐标函数 eFaO7mz5V%  
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() =7w\ 7-.m  
    '求得中心点坐标 /.3}aj;6  
Dim tt As String }j^i}^Du,  
Dim rt(3) As Single [NaN>BZ?  
    '判断是否平行 ! ='rc-E  
   acx = p3x - p1x ]ro*G"-_1#  
   acy = p3y - p1y d*jMZ%@uS  
   bdx = p4x - p2x H| 8Qp*  
   bdy = p4y - p2y [Grxw[(_:  
   If acx * bdy = acy * bdx Then 6{"$nF]  
      rt(0) = 0 b6Wqr/  
      Exit Function 7uKNd *%  
   Else ePr&!Tz#  
      '判断斜率存在否 {l>yi  
      If p1x = p3x And p2x <> p4x Then N"" BCh"  
         tt = "ac_n_bd_y" CS@FYO  
      ElseIf p1x <> p3x And p2x = p4x Then -&3hEv5  
         tt = "ac_y_bd_n" mzeY%A<0^  
      ElseIf p1x <> p3x And p2x <> p4x Then YpH&<$x:  
         tt = "ac_y_bd_y" `}(b2Hc>  
      End If }])oM|fgO  
    Select Case tt XiL~TCkx4  
         Case "ac_n_bd_y" F$ #U5}Q  
            'bd线段方程 @ o3T  
            k_bd = bdy / bdx 8vMG5
#U[  
            b_bd = p2y - k_bd * p2x |.F$G<  
            p_x = p1x =h0,?]z  
            p_y = k_bd * p_x + b_bd n;@bLJ$W  
         Case "ac_y_bd_n" W8ouO+wK  
            'ac线段方程 W+PJZn  
            k_ac = acy / acx U^Q:Y}^  
            b_ac = p1y - k_ac * p1x o=50>$5jlS  
            p_x = p2x # WAZ9,t  
            p_y = k_ac * p_x + b_ac 2nSSFx r  
        Case "ac_y_bd_y" H,DM1Z9rz  
           'ac，bd线段都要求 hEBY8=gK  
           k_ac = acy / acx sejg&8  
           b_ac = p1y - k_ac * p1x Ov-icDMm  
           k_bd = bdy / bdx zG ^$"f2  
           b_bd = p2y - k_bd * p2x 0\[Chja  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) te3}d'9&|  
           p_y = k_ac * p_x + b_ac 4)@mSSfn.  
        End Select Q4+gAS9  
      rt(1) = p_x iPd[l{85Z  
      rt(2) = p_y 7JEbH?lEN  
     -=~| ."O  
'计算最大半径 n/SwP  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) _a6[{_Pc  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ZUoxMm  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 1guJG_;z  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 9QDFEYG  
Dim bb(5) As Single BI3@|,._N  
  bb(1) = rr1 ;_rF;9z9  
  bb(2) = rr2 0`X]o'RxS  
  bb(3) = rr3 &
Xf^Iu  
  bb(4) = rr4 XZ^^%*ew  
  nb = rr1 "uaMk}[ <!  
For i = 1 To 4 ]j`c]
2EuP  
    If nb <= bb(i) Then p-Kz-+A[  
       nb = bb(i) L<ue$'  
    End If wE?'Cl  
Next i GBRa.;Kk  
    rt(0) = Sqr(nb) j!U-'zJ  
    rr = rt() [co% :xJu  
  End If U56G.  
         - `p4-J!Fy  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  mH%yGBp_  

y\Ic@-aWI  
有热压工艺方面的人才或者资料分享下； }<@b=_>S  
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 [d(U38BI  

高手真多！

楼主威武霸气.