[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： ~uuM
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关键点说几个： _ Uv3glK  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） C{YTHNn  
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 MYUL y2)  
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 `'ak/%Krh  

以下是几个重要的函数： ,772$
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1.判断点在区域中函数 e_llW(*l8^  
2.计算夹角函数 5-"aK~@+  
3.转置函数 HCaEETk5  
4.得到区域中心点，及区域半径函数 "SV/'0  
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） m!:sDQn{3  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 zl$z>z)  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 7@ mP;K0  
   cax = x2 - x1 m"~),QwF9  
   cay = y2 - y1 Y NGS"3F  
   cbx = x2 - x3 86~q pN  
   cby = y2 - y3 Ce_l\J8G  
   mo_jj = cax * cbx + cay * cby k;vhQ=  
   mo_ca = Sqr(cax * cax + cay * cay) TL([hR _  
   mo_cb = Sqr(cbx * cbx + cby * cby) #mc6;TRZO  
   cos_acb = mo_jj / (mo_ca * mo_cb) sT>l ?L  
   'ff_cos = cos_acb uG4Q\,R  
   If cos_acb >= 1 Then  t/a  
   nn = 0 HeM-  
   ElseIf cos_acb <= -1 Then ?^ `EI}g  
   nn = 3.14159265258979 tN&X1  
   Else oY7 eVuz  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) {_X&{dZLX  
   End If Q5tx\GE  
   'ff_angle = nn 7
R>Pk9J  
   ff_angle = nn * 180 / 3.14159265258979 Dqm;twd>  
End Function

'判断点在区域内函数 q%k _C0  
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 HH'5kE0;d  
Dim aob, boc, cod, doa, sum As Single j'|`:^ Sy  
  If ppx = p1x And ppy = p1y Then O:W4W=K  
     point_in = True ^I6GH?19>e  
     Exit Function Ozs&YZ  
  End If Iih]q  
  If ppx = p2x And ppy = p2y Then bd3q207>  
     point_in = True K_LwYO3  
     Exit Function Q#*Pjl  
  End If /SQ1i}%  
   If ppx = p3x And ppy = p3y Then K"9V8x3Wg  
     point_in = True 1TL~I-G&n  
     Exit Function <^wqN!/  
  End If +v"%@lC};  
     y7Y g$)sL  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) [Xo}CU  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) wM&W
R2  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) "SN+ ^`  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) /&G )IY]g  
    sum = aob + boc + cod + doa 6O'6,%#  
    If 360.01 > sum And sum > 359.99 Then a1# 'uS9W  
       point_in = True /S&8%fb  
    Else {Qj7?}xW  
       point_in = False y,=TB#  
    End If +@5*_n\e`  
End Function

'得到点半径,得到交点坐标函数  0@dN$e  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() :Y2J7p[+  
    '求得中心点坐标 T&~7*j(|e  
Dim tt As String #~`]eM5`J  
Dim rt(3) As Single X3,+aL`  
    '判断是否平行 7c.LyvM  
   acx = p3x - p1x ]<?7CpP  
   acy = p3y - p1y +2S#3m?1  
   bdx = p4x - p2x R SqO$~  
   bdy = p4y - p2y zV"oB9\9O  
   If acx * bdy = acy * bdx Then UV8K$n<  
      rt(0) = 0 'ai!6[|SD  
      Exit Function om}jQJ]KH  
   Else ~6-6aYhe  
      '判断斜率存在否 _4#&!b6  
      If p1x = p3x And p2x <> p4x Then 2rJe
ON  
         tt = "ac_n_bd_y" E5F0C]hq  
      ElseIf p1x <> p3x And p2x = p4x Then >*cg K}!@  
         tt = "ac_y_bd_n" Jdp@3mP  
      ElseIf p1x <> p3x And p2x <> p4x Then JypXQC}~  
         tt = "ac_y_bd_y" m5rJY/  
      End If H.8Vm[W  
    Select Case tt 1I -LGe[Q  
         Case "ac_n_bd_y" .WT^L2l%  
            'bd线段方程 Kk_h&by?  
            k_bd = bdy / bdx zS+_6s  
            b_bd = p2y - k_bd * p2x KL\]1YX  
            p_x = p1x sCE2 F_xjL  
            p_y = k_bd * p_x + b_bd J,=: ]t  
         Case "ac_y_bd_n" &b7i> ()  
            'ac线段方程 %:WM]dc  
            k_ac = acy / acx ;_hL  
            b_ac = p1y - k_ac * p1x I~.d/!
>Z
 
            p_x = p2x nlkQ'XGAI  
            p_y = k_ac * p_x + b_ac 0x/3Xz  
        Case "ac_y_bd_y" #\)tz z  
           'ac，bd线段都要求 {#'M3z=  
           k_ac = acy / acx auS.q5 %  
           b_ac = p1y - k_ac * p1x I_h{n{,sr  
           k_bd = bdy / bdx lSk<euCYs  
           b_bd = p2y - k_bd * p2x @*rED6zH  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 7yK1Q_XY>  
           p_y = k_ac * p_x + b_ac SJdi*>  
        End Select c@1q8,  
      rt(1) = p_x #RA3 T[A  
      rt(2) = p_y /P3s.-sL  
     [M{EO)  
'计算最大半径 ?dcR!-3  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 9?_ybO~Oq  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 8K/o/  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) w(xRL#%  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ^,M&PP6  
Dim bb(5) As Single /NDuAjp[@  
  bb(1) = rr1 \"u3x.!  
  bb(2) = rr2 "=BO,see9  
  bb(3) = rr3 4:
<=%d  
  bb(4) = rr4 6b8@6;&LI  
  nb = rr1 0fd\R_"d.  
For i = 1 To 4 
P_w\d/3  
    If nb <= bb(i) Then 0u"/7OU  
       nb = bb(i) r 7mg>3  
    End If o-D,K dY  
Next i yU@~UCmja  
    rt(0) = Sqr(nb) a}w%k  
    rr = rt() #1C~i}J1  
  End If !tNJLOYf  
         pM i w9}  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  x 0  

|Z;wk&  
有热压工艺方面的人才或者资料分享下； ^+[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 dW7dMx  

高手真多！

楼主威武霸气.