[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： d-W@/J  
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8Moe8X#3  

关键点说几个： zq:+e5YT?T  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 0TDcQ  
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 a5)<roWQ  
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 #|ppW fZQ  

以下是几个重要的函数： <]SI-  
1.判断点在区域中函数  3ih3O  
2.计算夹角函数 1TOT}h5  
3.转置函数 $jc&Tk#  
4.得到区域中心点，及区域半径函数 <hJ%]]  
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） O/?Lk*r  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 oB$P6
 
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single hB!>*AsG  
   cax = x2 - x1 Xcy Xju#"p  
   cay = y2 - y1 T>!Y-e.q  
   cbx = x2 - x3 :vsF4  
   cby = y2 - y3 M9t`w-@_w  
   mo_jj = cax * cbx + cay * cby 0m,3''Q5lO  
   mo_ca = Sqr(cax * cax + cay * cay) -;i vBR  
   mo_cb = Sqr(cbx * cbx + cby * cby) 4P>4d +  
   cos_acb = mo_jj / (mo_ca * mo_cb) @_ZE_n   
   'ff_cos = cos_acb BDO]-y  
   If cos_acb >= 1 Then #},4m  
   nn = 0 |e]2 >NjQa  
   ElseIf cos_acb <= -1 Then "u H VX|`  
   nn = 3.14159265258979 &nRbI:R  
   Else cl'#nLPz;  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) q#6K'
=AC  
   End If Y*KP1=Md  
   'ff_angle = nn ac2G;}B|  
   ff_angle = nn * 180 / 3.14159265258979 
cD6T4  
End Function

'判断点在区域内函数 {'^!S"9x  
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 Wpdn^=dhL  
Dim aob, boc, cod, doa, sum As Single 2H]~X9,z2  
  If ppx = p1x And ppy = p1y Then mDG=h6y"V  
     point_in = True e*Y>+*2y  
     Exit Function G|LJOq7QB  
  End If T+q3]&  
  If ppx = p2x And ppy = p2y Then (c'kZ9&  
     point_in = True j@98UZ{g\  
     Exit Function oA;> z  
  End If aOOkC&%  
   If ppx = p3x And ppy = p3y Then m0a<~  
     point_in = True 9P)28\4  
     Exit Function KJLC2,  
  End If n;w&}g  
     v<Ozr:lL  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) c[6=&  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) WS7a]~3'  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) o=}vK[0u  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) /+p]VHP\  
    sum = aob + boc + cod + doa / Ml d.  
    If 360.01 > sum And sum > 359.99 Then ^gu;  
       point_in = True SR<*y

O  
    Else tnn,lWu|  
       point_in = False g3h:oQCS  
    End If ?04$1n:  
End Function

'得到点半径,得到交点坐标函数 nWzGb2Y  
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() M,WC+")Z=  
    '求得中心点坐标 by{ *R  
Dim tt As String OM1pyt  
Dim rt(3) As Single .%3qzOrN  
    '判断是否平行 %CaUC'  
   acx = p3x - p1x g0&Rl  
   acy = p3y - p1y F# a)"$j;  
   bdx = p4x - p2x L74Sx0nk=  
   bdy = p4y - p2y d$O)k+j  
   If acx * bdy = acy * bdx Then NU#rv%p  
      rt(0) = 0 =JK# "'  
      Exit Function ;i,:F`b~  
   Else a#NP69  
      '判断斜率存在否 i(p
evu  
      If p1x = p3x And p2x <> p4x Then OD~TWT_  
         tt = "ac_n_bd_y" /U1 jCLR'  
      ElseIf p1x <> p3x And p2x = p4x Then &qP@WFl  
         tt = "ac_y_bd_n" *K}j>A  
      ElseIf p1x <> p3x And p2x <> p4x Then 1$^=M[v  
         tt = "ac_y_bd_y" M,f|.p{,Y  
      End If j1hx{P'  
    Select Case tt `tjH#
W`  
         Case "ac_n_bd_y" @m99xF\e  
            'bd线段方程 SB<09|2  
            k_bd = bdy / bdx cz6\qSh\,  
            b_bd = p2y - k_bd * p2x "v9i;Ba>+  
            p_x = p1x ZR|cZH1}C  
            p_y = k_bd * p_x + b_bd r!,/~~mT  
         Case "ac_y_bd_n" jh*aD=y  
            'ac线段方程 RE?j)$y?`  
            k_ac = acy / acx i)[8dv  
            b_ac = p1y - k_ac * p1x -1P*4H2a  
            p_x = p2x 5uJ{#Zd  
            p_y = k_ac * p_x + b_ac <s737Rl  
        Case "ac_y_bd_y" ?t{ 2y1  
           'ac，bd线段都要求 (wtw1E5X  
           k_ac = acy / acx TM1D|H  
           b_ac = p1y - k_ac * p1x ^^m3 11=  
           k_bd = bdy / bdx mEM/}]2  
           b_bd = p2y - k_bd * p2x 3"pl="[*  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) f|&ga'5g&  
           p_y = k_ac * p_x + b_ac IxxA8[^V  
        End Select &\_cU?0d  
      rt(1) = p_x 5csqu^/y  
      rt(2) = p_y UVIR P#  
     XM"{"  
'计算最大半径 sJHN4  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) '+Gy)@c  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) NxyrP**j  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) UJX=lh.o  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ]F]!>dKA  
Dim bb(5) As Single w=txSF&Qr  
  bb(1) = rr1 R Wd#)3  
  bb(2) = rr2 )&$Zt(  
  bb(3) = rr3 tHj |_t  
  bb(4) = rr4 &d8z`amP  
  nb = rr1 @}^eyS$|!  
For i = 1 To 4 p7YfOUo k  
    If nb <= bb(i) Then mAFVjSa2  
       nb = bb(i) h"-}BjL  
    End If KC`~\sYRN]  
Next i )7j CEA03  
    rt(0) = Sqr(nb) f/&k$,w  
    rr = rt() u,rieKYF  
  End If iQI$Y]Y7  
         mh4`,N  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  3sk$B%a>Z  

i4Y_5  
有热压工艺方面的人才或者资料分享下； 0.}Um  
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 ,_ XDCu @  

高手真多！

楼主威武霸气.