[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：  ylS
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关键点说几个： Dsc0;7~6  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ~3Zz.!F  
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 [F;\NJp6?^  
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 9k6/D.Dz  

以下是几个重要的函数： x>tm[k  
1.判断点在区域中函数 W=LJhCpRHj  
2.计算夹角函数 S#HeOPRL  
3.转置函数 ^8]7  
4.得到区域中心点，及区域半径函数 ~ qa
T jSP  
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） fkImX:|q  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 f&$;iE  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single j!oX\Y-:&  
   cax = x2 - x1  7
( Z9\  
   cay = y2 - y1 |`Yn'Mj8rm  
   cbx = x2 - x3 yV(9@lj3;  
   cby = y2 - y3 e{Vn{.i,5  
   mo_jj = cax * cbx + cay * cby 8t, &dq  
   mo_ca = Sqr(cax * cax + cay * cay) ggkz fg&  
   mo_cb = Sqr(cbx * cbx + cby * cby) L;L_$hu)  
   cos_acb = mo_jj / (mo_ca * mo_cb) )Y'g;  
   'ff_cos = cos_acb 4
g}r+!T  
   If cos_acb >= 1 Then Q=vo5)t   
   nn = 0 M8\/[R\  
   ElseIf cos_acb <= -1 Then nN@ Ch  
   nn = 3.14159265258979 *zDDi(@vtK  
   Else |O'*CCrCL  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) *n# =3D  
   End If MtF0/aT  
   'ff_angle = nn ,_w}\'?L  
   ff_angle = nn * 180 / 3.14159265258979 Vm8dX?  
End Function

'判断点在区域内函数 _h,_HW)G  
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 =ud~  
Dim aob, boc, cod, doa, sum As Single Q8QB{*4  
  If ppx = p1x And ppy = p1y Then :sLg$OF  
     point_in = True m-;8O /  
     Exit Function ,O-_Pv  
  End If >hq{:m  
  If ppx = p2x And ppy = p2y Then q@XJ,e1A  
     point_in = True *icaKy3  
     Exit Function _5(p=Zc  
  End If h"Wpb}FT  
   If ppx = p3x And ppy = p3y Then `'3 De(  
     point_in = True 5WxN
H}{  
     Exit Function w2/
3[VZ}l  
  End If fO^s4gWTg  
     /38I(0  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) YPq:z"`-y4  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) $3&XM  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 'NfsAE  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) tSoF!@6  
    sum = aob + boc + cod + doa @"/H er  
    If 360.01 > sum And sum > 359.99 Then {%^4%Eco  
       point_in = True 5`Uzxu  
    Else r2i]9>w  
       point_in = False \+Y=}P>  
    End If *&_cp]3-WF  
End Function

'得到点半径,得到交点坐标函数 Z(R0IW  
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() wmXI8'~F&  
    '求得中心点坐标
QkHG`yW  
Dim tt As String i1KjQ1\a+  
Dim rt(3) As Single c>3? T^=  
    '判断是否平行 J]S30&?  
   acx = p3x - p1x ~7g$TAe{  
   acy = p3y - p1y l7VTuVGUJ  
   bdx = p4x - p2x 6|3 X*Orn  
   bdy = p4y - p2y '|5o(6u'  
   If acx * bdy = acy * bdx Then `ZM$\Q=:  
      rt(0) = 0 6w m-uu  
      Exit Function $""kZ  
   Else ;XjXv'  
      '判断斜率存在否 #;@I.  
      If p1x = p3x And p2x <> p4x Then FU .%td=:  
         tt = "ac_n_bd_y" Lw(tO0b2H  
      ElseIf p1x <> p3x And p2x = p4x Then mSZg;7DE3*  
         tt = "ac_y_bd_n" S0:Oep   
      ElseIf p1x <> p3x And p2x <> p4x Then cVO-iPK  
         tt = "ac_y_bd_y" >JY\h1+ H  
      End If Y= =5\;-  
    Select Case tt 9h)8Mq+M  
         Case "ac_n_bd_y" KiKw,@  
            'bd线段方程 @H+L1H%9n  
            k_bd = bdy / bdx yuJ>xsM  
            b_bd = p2y - k_bd * p2x 7w8UnPuM  
            p_x = p1x mQ`2c:Rn&7  
            p_y = k_bd * p_x + b_bd em)%U  
         Case "ac_y_bd_n" wxPl[)E  
            'ac线段方程 jA^Dk$  
            k_ac = acy / acx OU#p^5K  
            b_ac = p1y - k_ac * p1x 8tna<Hx  
            p_x = p2x Wc!]X.|9*  
            p_y = k_ac * p_x + b_ac xWK/uE(  
        Case "ac_y_bd_y" T9]0/>  
           'ac，bd线段都要求 afD {w*[8  
           k_ac = acy / acx jAy2C&aP  
           b_ac = p1y - k_ac * p1x "XLtrAu{  
           k_bd = bdy / bdx _JTK$\  
           b_bd = p2y - k_bd * p2x E.ji;5  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) GQd[7j[sh  
           p_y = k_ac * p_x + b_ac 1=,2i)  
        End Select Hy,""Py  
      rt(1) = p_x vZ57 S13  
      rt(2) = p_y 2  @T~VRy  
     ;~d$OM  
'计算最大半径 @H~oOf  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) =2NrmwWZs  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) $o\z4_I  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) CQa8I2VF (  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) r%ebC  
Dim bb(5) As Single d8+@K&
z|  
  bb(1) = rr1 J=: \b  
  bb(2) = rr2 ~OvbMWu  
  bb(3) = rr3 Kr1Y3[iNv  
  bb(4) = rr4 4E2/?3D  
  nb = rr1 6vps`k$,~  
For i = 1 To 4 2e-bt
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    If nb <= bb(i) Then wQd8/&mmk  
       nb = bb(i) jV%=YapF  
    End If cZ)mp`^n7  
Next i ONDO xXs  
    rt(0) = Sqr(nb) %0/qb0N&  
    rr = rt() <-n^h~,4  
  End If 8Lx1XbwK  
         3"v>y]$U  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  V59!}kel1%  

U!c+i#:t  
有热压工艺方面的人才或者资料分享下； XxdD)I  
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 r*$f^T!|  

高手真多！

楼主威武霸气.