[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： n(9$)B_y  
p{x6BVw?>  
TMD*-wYr  

关键点说几个： c~={A  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 24*3m&fA*K  
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 W~5gTiBZ]  
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 #!>`$  

以下是几个重要的函数： KVHK~Y-G  
1.判断点在区域中函数 X7SSTcA  
2.计算夹角函数 $#_^uWN-M  
3.转置函数 [OFT!=.y &  
4.得到区域中心点，及区域半径函数 _)~|Z~  
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） uN0'n}c;1.  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 mG%cE(j*D  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single }dSFv   
   cax = x2 - x1 R=W$3Ue~,  
   cay = y2 - y1 E8o9ufj3  
   cbx = x2 - x3 s%
?<:
9  
   cby = y2 - y3 3ep L'My$  
   mo_jj = cax * cbx + cay * cby we?t/YB=  
   mo_ca = Sqr(cax * cax + cay * cay) M+4S>Sjw  
   mo_cb = Sqr(cbx * cbx + cby * cby) th=45y"C  
   cos_acb = mo_jj / (mo_ca * mo_cb) UHDcheeRD  
   'ff_cos = cos_acb '=IuwCB|;  
   If cos_acb >= 1 Then efh1-3f  
   nn = 0 "?YpF2pD  
   ElseIf cos_acb <= -1 Then L~_zR>  
   nn = 3.14159265258979 R xWD>:  
   Else e co=ia  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) o#IWH;ck.  
   End If /`w'X/'VJ  
   'ff_angle = nn [ HjG
dC  
   ff_angle = nn * 180 / 3.14159265258979 gKb5W094@  
End Function

'判断点在区域内函数 ;<`  
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 &l~=c2  
Dim aob, boc, cod, doa, sum As Single {K2F(kz?T  
  If ppx = p1x And ppy = p1y Then j0jam:.p  
     point_in = True ~K|o@LK  
     Exit Function JDC,]  
  End If 14\!FCe)!  
  If ppx = p2x And ppy = p2y Then NO)vk+   
     point_in = True @yjui  
     Exit Function 5{6ebq55"  
  End If /XW,H0pR  
   If ppx = p3x And ppy = p3y Then KL*UU,qU  
     point_in = True vGPaWYV  
     Exit Function z~a]dMs"(P  
  End If ]%%cc  
     O4 Y;  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 6d/b*,4[  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) [h2V9>4:  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) %K]nX#.B&  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) FdJC@Y-#uA  
    sum = aob + boc + cod + doa ts0K"xmY\c  
    If 360.01 > sum And sum > 359.99 Then /h%MWCZWm^  
       point_in = True *'(dcy9  
    Else LvS3c9|Aj  
       point_in = False K#{E87
G(  
    End If (.
3L'+F  
End Function

'得到点半径,得到交点坐标函数 i&FC-{|Z  
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() 0?t!tugG  
    '求得中心点坐标 _>:g&pS/  
Dim tt As String Vt
4}!b(O  
Dim rt(3) As Single ig/716r|  
    '判断是否平行 49Ue2=PP#  
   acx = p3x - p1x "WYcw\@U  
   acy = p3y - p1y jIc;jjAF  
   bdx = p4x - p2x IJXH_H_%*  
   bdy = p4y - p2y c\4n7m,y  
   If acx * bdy = acy * bdx Then C127he  
      rt(0) = 0 k*c:%vC!  
      Exit Function 1,`x1dcO!A  
   Else @#H{nj Z  
      '判断斜率存在否 rb\Ohv\  
      If p1x = p3x And p2x <> p4x Then gkk<-j'  
         tt = "ac_n_bd_y" ,em6wIq,  
      ElseIf p1x <> p3x And p2x = p4x Then 1I
^Sv  
         tt = "ac_y_bd_n" 6l vx  
      ElseIf p1x <> p3x And p2x <> p4x Then p go\(K0  
         tt = "ac_y_bd_y" q%:Jmi>  
      End If (Fgt#H(B  
    Select Case tt r IK|}5  
         Case "ac_n_bd_y" ?s"v0cg+  
            'bd线段方程 *u{.K:.I  
            k_bd = bdy / bdx F<(xz=  
            b_bd = p2y - k_bd * p2x Eq<#pX6  
            p_x = p1x 0RSa{iS*A  
            p_y = k_bd * p_x + b_bd H@j^,  
         Case "ac_y_bd_n" 2aje$w-  
            'ac线段方程 nG%j4r ;  
            k_ac = acy / acx ,m b3H  
            b_ac = p1y - k_ac * p1x 610k#$  
            p_x = p2x 49zp@a  
            p_y = k_ac * p_x + b_ac +li^0+3-'  
        Case "ac_y_bd_y" iRVLo~  
           'ac，bd线段都要求 1aT$07G0  
           k_ac = acy / acx gq@."wHU  
           b_ac = p1y - k_ac * p1x 6~/H#8Kdn  
           k_bd = bdy / bdx U;q)01  
           b_bd = p2y - k_bd * p2x X*yl%V  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) #dfW1@m  
           p_y = k_ac * p_x + b_ac 0?h .X=G  
        End Select hB+ t pa  
      rt(1) = p_x TnaIRJ\B  
      rt(2) = p_y Elq8WtS  
     T?ZMmUE  
'计算最大半径 5Q}@Y3 i=  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) H= y-Y_R  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) zXCIn  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ;hZ@C!S:  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) -oo=IUk  
Dim bb(5) As Single *sG<w%%  
  bb(1) = rr1 4yM8W\je  
  bb(2) = rr2 3U`.:w`  
  bb(3) = rr3 rh l5r"%  
  bb(4) = rr4 IyuT=A~Ki  
  nb = rr1 m#eD v*  
For i = 1 To 4 *j* WE\  
    If nb <= bb(i) Then ~GeYB6F  
       nb = bb(i) D?'y)](  
    End If 
NE4fQi?3  
Next i  k WtUj  
    rt(0) = Sqr(nb) 4dK@UN\  
    rr = rt() wg1pt1 `  
  End If mC7Y *  
         @6!JW(,]\  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  B
kxhF  

('q vYQ  
有热压工艺方面的人才或者资料分享下； Lu39eO6  
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 V55J[s*6!  

高手真多！

楼主威武霸气.