[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： t =*K?'ly  
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关键点说几个： H,I}R  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） m!2Dk#t  
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 7&QVw(:)M  
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 {c1qC zM4  

以下是几个重要的函数： HUghl2L.<  
1.判断点在区域中函数 j*zK"n  
2.计算夹角函数 N:<O  
3.转置函数 <2Q@^  
4.得到区域中心点，及区域半径函数 Ocb2XEF  
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） ,,J3 h  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 caP  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single rTm{-b)r  
   cax = x2 - x1 R]Oy4U,f  
   cay = y2 - y1 >S!DIL  
   cbx = x2 - x3 .ndQ(B  
   cby = y2 - y3 5\S7Va;W  
   mo_jj = cax * cbx + cay * cby , .I^ekF  
   mo_ca = Sqr(cax * cax + cay * cay) f*],j  
   mo_cb = Sqr(cbx * cbx + cby * cby) FT;JYkO  
   cos_acb = mo_jj / (mo_ca * mo_cb) k~#|8eLv  
   'ff_cos = cos_acb :/NN=3e  
   If cos_acb >= 1 Then 4I*Mc%dD  
   nn = 0 z
l\#n:|  
   ElseIf cos_acb <= -1 Then KV_Ga8hs  
   nn = 3.14159265258979 a,~P_B|@  
   Else F4Uk+|]Bu  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) {wP|b@(1t  
   End If A
s|/ O7%  
   'ff_angle = nn Z-|C{1}A  
   ff_angle = nn * 180 / 3.14159265258979 G C'%s  
End Function

'判断点在区域内函数 XL^N5  
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 ?MM3LA! <  
Dim aob, boc, cod, doa, sum As Single UwkX[u  
  If ppx = p1x And ppy = p1y Then <UJJ],)^1A  
     point_in = True |"qB2.[  
     Exit Function
T''+zk  
  End If wG5RN;`V  
  If ppx = p2x And ppy = p2y Then k{jw%a<Sc  
     point_in = True 4QAIQQS  
     Exit Function V1)P=?%(US  
  End If /dt!J `:  
   If ppx = p3x And ppy = p3y Then DA)v3Nd  
     point_in = True MuV0;K\  
     Exit Function Ok
~{@\  
  End If q_y,j&  
      |7zP8  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Treh{s  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 'S7@+kJ  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) :IVMTdYf  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 6^O?p2xpo  
    sum = aob + boc + cod + doa h5rP]dbhXU  
    If 360.01 > sum And sum > 359.99 Then QX.6~*m1  
       point_in = True qMES<UL>  
    Else z-G7Y#  
       point_in = False $H-D9+8 7  
    End If eD{ @0&
 
End Function

'得到点半径,得到交点坐标函数 e9@fQ  
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() }SMJD  
    '求得中心点坐标 #VdI{IbW  
Dim tt As String MAe<.DHY  
Dim rt(3) As Single @=NVOJy}c  
    '判断是否平行 5m.KtnT)  
   acx = p3x - p1x G:c8`*5Q  
   acy = p3y - p1y HS
6Imi  
   bdx = p4x - p2x 4ZJT[zi  
   bdy = p4y - p2y
SXBQ  
   If acx * bdy = acy * bdx Then 3H'nRK},  
      rt(0) = 0 dD^_^'i  
      Exit Function Uty(sDtu  
   Else 5<O61Lgx  
      '判断斜率存在否 L);||]B  
      If p1x = p3x And p2x <> p4x Then r($_>TS&"  
         tt = "ac_n_bd_y" B2G5hbaA  
      ElseIf p1x <> p3x And p2x = p4x Then Krr?`n  
         tt = "ac_y_bd_n" 0?F@iB~1F  
      ElseIf p1x <> p3x And p2x <> p4x Then oBj>9I;  
         tt = "ac_y_bd_y" I,<>%Z|'  
      End If RZd4(7H=q  
    Select Case tt p_5>?[TW:  
         Case "ac_n_bd_y" }^pQ
bFku  
            'bd线段方程 X(!AI|6Bt  
            k_bd = bdy / bdx lv00sa2z  
            b_bd = p2y - k_bd * p2x QypiF*fSU  
            p_x = p1x 3j+=3n,  
            p_y = k_bd * p_x + b_bd l|vWeBs  
         Case "ac_y_bd_n" W"-EC`nP  
            'ac线段方程 53`9^|:  
            k_ac = acy / acx /=muj9|+s  
            b_ac = p1y - k_ac * p1x pY)j0tdd  
            p_x = p2x V5yxQb  
            p_y = k_ac * p_x + b_ac )&Kn(l)  
        Case "ac_y_bd_y" )iEa2uJ  
           'ac，bd线段都要求 MJ>Qq[0  
           k_ac = acy / acx Qh|-a@  
           b_ac = p1y - k_ac * p1x V#zhGAMy.  
           k_bd = bdy / bdx KkdG.c'  
           b_bd = p2y - k_bd * p2x MdVCD^B  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ?GUz?'d  
           p_y = k_ac * p_x + b_ac }RA3$%3  
        End Select Bbl)3$`,  
      rt(1) = p_x Y( 1L>4  
      rt(2) = p_y Et}C`vZ+Ve  
     HzD>-f  
'计算最大半径 `R=a@DQ  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 23}BW_m  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 28T\@zi  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) b`h%W"|2L  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) z"6ZDC6
 
Dim bb(5) As Single 'R4>CZ%jV  
  bb(1) = rr1 <\1}@?NGC  
  bb(2) = rr2 QJM-`(  
  bb(3) = rr3 \~gA+o}Q  
  bb(4) = rr4 ?418*tXd  
  nb = rr1 GOYn\N;V2  
For i = 1 To 4 L.09\1?.n  
    If nb <= bb(i) Then _HWHQF7  
       nb = bb(i) ,
J~,ga~  
    End If *? K4!q'  
Next i ?%\mQmjas  
    rt(0) = Sqr(nb) ~K5Cr  
    rr = rt() vp\PYg;x  
  End If *[d~Nk%Y$  
         F=oHl@  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  8GY.){d!l  

 7krh4  
有热压工艺方面的人才或者资料分享下； 1:_=g#WH  
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 }xqXd
%uz  

高手真多！

楼主威武霸气.