[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： )~6974  
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#xmUND`@  

关键点说几个： @t_<oOI2  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） L8V'mUyD  
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 I0Vm^\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 {Z|C  

以下是几个重要的函数： 9Vp$A$7M  
1.判断点在区域中函数 C ZJW`c/  
2.计算夹角函数 zNBG;\W  
3.转置函数 j*CnnM#n  
4.得到区域中心点，及区域半径函数 L|c01  
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） 6ds&n#n  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 hGPjH=^EM  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single {~Phc 2z  
   cax = x2 - x1 ll6~8PN  
   cay = y2 - y1 A6-JV8^  
   cbx = x2 - x3 rl!c\  
   cby = y2 - y3 W4Zi?@L>'  
   mo_jj = cax * cbx + cay * cby ^G5_d"Gr  
   mo_ca = Sqr(cax * cax + cay * cay) yXlzImPn  
   mo_cb = Sqr(cbx * cbx + cby * cby) `2GHB@S"k  
   cos_acb = mo_jj / (mo_ca * mo_cb) *`|F?wF  
   'ff_cos = cos_acb :c c#e&BO  
   If cos_acb >= 1 Then b8>rUGA{  
   nn = 0 s$mcIMqs  
   ElseIf cos_acb <= -1 Then '#^ONnSTn  
   nn = 3.14159265258979 "MlY G6  
   Else K4y4!zz  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) uZi]$/ic  
   End If /I="+  
   'ff_angle = nn xa
ejG/'iK  
   ff_angle = nn * 180 / 3.14159265258979 BsRxD9r  
End Function

'判断点在区域内函数 nT9B?P>  
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 N_Yop  
Dim aob, boc, cod, doa, sum As Single gTm[<Y  
  If ppx = p1x And ppy = p1y Then =fEn h'KE  
     point_in = True A@+pv
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     Exit Function ~`(#sjr6KR  
  End If "4|D"|wI)  
  If ppx = p2x And ppy = p2y Then o[
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     point_in = True zJOL\J'  
     Exit Function YrFB~z.V  
  End If WM~@/J  
   If ppx = p3x And ppy = p3y Then 89@gYA"Su  
     point_in = True )mS Aog<  
     Exit Function DhYQ>Gv8U  
  End If V!(Ty%7  
     Z-.`JkKd8  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) K#kU6/  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) gYw4YP0Gz  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) V`m'r+ Y  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) GBVw6+(c  
    sum = aob + boc + cod + doa JT#jJ/^  
    If 360.01 > sum And sum > 359.99 Then 'WUd7  
       point_in = True ~A(fn
:d  
    Else l`4hWs\I  
       point_in = False _f8Wa u# "  
    End If p<: b
Pw  
End Function

'得到点半径,得到交点坐标函数 =W$ f+  
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() 7VduewKX8  
    '求得中心点坐标 aEM2xrhy,  
Dim tt As String 4}E|CD/p
Z  
Dim rt(3) As Single .zZee,kM  
    '判断是否平行 CB]#`|f  
   acx = p3x - p1x D
,b
'1=  
   acy = p3y - p1y F !g>fIg  
   bdx = p4x - p2x dj>zy  
   bdy = p4y - p2y 3|x*lmit  
   If acx * bdy = acy * bdx Then wc`UcGO  
      rt(0) = 0 xkV(E!O  
      Exit Function x]{
}y_  
   Else Y@B0.5U2  
      '判断斜率存在否 p8,Rr{  
      If p1x = p3x And p2x <> p4x Then GCm(3%{V%(  
         tt = "ac_n_bd_y" B|XrjI?  
      ElseIf p1x <> p3x And p2x = p4x Then iq*]CF  
         tt = "ac_y_bd_n" |mvY=t %  
      ElseIf p1x <> p3x And p2x <> p4x Then v"ZNS  
         tt = "ac_y_bd_y" |qTvy,U[  
      End If +?y ', Ir  
    Select Case tt Uq/FH@E=  
         Case "ac_n_bd_y" |7ct2o~un  
            'bd线段方程  i;B &~  
            k_bd = bdy / bdx i7D[5!  
            b_bd = p2y - k_bd * p2x |iSd
<  
            p_x = p1x ?TTtGbvU  
            p_y = k_bd * p_x + b_bd t$~CLq5ad  
         Case "ac_y_bd_n" W'lejOiw  
            'ac线段方程 %n?&#_G|  
            k_ac = acy / acx %x{jmZ$}  
            b_ac = p1y - k_ac * p1x ,Y9bXC8+dU  
            p_x = p2x ISa}Km>Q  
            p_y = k_ac * p_x + b_ac 6.5E d-  
        Case "ac_y_bd_y" &`x1_*l  
           'ac，bd线段都要求 r)<c ~\0 7  
           k_ac = acy / acx o0ky]9 P  
           b_ac = p1y - k_ac * p1x `st3iTLZY  
           k_bd = bdy / bdx jEhPx  
           b_bd = p2y - k_bd * p2x }Um,wY[tK  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) zu/BDyF  
           p_y = k_ac * p_x + b_ac "qh~wKJ  
        End Select (:er~Y}  
      rt(1) = p_x (E(J}r~E  
      rt(2) = p_y R?62gH  
     !#&`1cYX  
'计算最大半径 hufpky[&8  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) l(A)Gd5>  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) KpX1GrIn3  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) O,.c gX   
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) g79zzi-  
Dim bb(5) As Single ^O6eFD U  
  bb(1) = rr1 LUaOp "  
  bb(2) = rr2 x&p.-Fi  
  bb(3) = rr3 Fv_B(a  
  bb(4) = rr4 R1C}S  
  nb = rr1 {<cL@W  
For i = 1 To 4 7m$EZTw?  
    If nb <= bb(i) Then
h;[<4zw  
       nb = bb(i) <>v=jH|L  
    End If d HN"pNNs  
Next i 3s\}|LqX#  
    rt(0) = Sqr(nb) o'EJ,8  
    rr = rt() -kk0zg &|i  
  End If 3-/F]}0y6  
         '[Zgwz;z  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  6zi 5#23  

GExr] 2r  
有热压工艺方面的人才或者资料分享下； o%!s/Z1  
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 Z~w2m6;s  

高手真多！

楼主威武霸气.