[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： WacU@L $A  
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关键点说几个： YjIED,eRv  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） LBbo.KxAe3  
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 ?V\9,BTb)  
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 uz#eO|z@o  

以下是几个重要的函数： 13_+$DhU-L  
1.判断点在区域中函数 ttAVB{kdo  
2.计算夹角函数 8)q]^  
3.转置函数 +k(3+b$S-  
4.得到区域中心点，及区域半径函数 n%MYX'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） 3Ld ;zW  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 zhvk%Y:  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 6t mNfI34  
   cax = x2 - x1 E_gDwWot  
   cay = y2 - y1 84oW  
   cbx = x2 - x3 neY=:9  
   cby = y2 - y3 */Ry6Yu  
   mo_jj = cax * cbx + cay * cby U0bEB  
   mo_ca = Sqr(cax * cax + cay * cay) ,w/mk$v  
   mo_cb = Sqr(cbx * cbx + cby * cby) hC 4X Y  
   cos_acb = mo_jj / (mo_ca * mo_cb) j+B5m:ExfI  
   'ff_cos = cos_acb O]%m{afM  
   If cos_acb >= 1 Then t1{%FJ0F  
   nn = 0 8.3_Wb(c  
   ElseIf cos_acb <= -1 Then /&!d  
   nn = 3.14159265258979 a^}P_hg}-  
   Else Z"%O&O  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 1PTu3o&3  
   End If
~ew**@N  
   'ff_angle = nn >LaL!PnZ  
   ff_angle = nn * 180 / 3.14159265258979 Gv+
Tg/  
End Function

'判断点在区域内函数 Z2j*%/  
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 cxJK>%84  
Dim aob, boc, cod, doa, sum As Single gWv+i/,  
  If ppx = p1x And ppy = p1y Then \/4%[Q2QDm  
     point_in = True ,JBw$C  
     Exit Function nh&<fnh  
  End If q{+poVX  
  If ppx = p2x And ppy = p2y Then a*8.^SdzR  
     point_in = True MbFe1U]B  
     Exit Function <C96]}/ ?  
  End If ]XafFr6pe  
   If ppx = p3x And ppy = p3y Then WKJL< D ]:  
     point_in = True +2f
J  
     Exit Function @]"9EW 0  
  End If )~mc1U`b  
     m^x\@!N:(  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) jhbH6=f4]^  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) >h( rd1  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) :E&T}RN  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) yz$1qEII`q  
    sum = aob + boc + cod + doa U9[A(  
    If 360.01 > sum And sum > 359.99 Then yGG\[I;7  
       point_in = True _xL&sy09t  
    Else /FV6lR!0^  
       point_in = False vrnj}f[h  
    End If m'"VuH?^  
End Function

'得到点半径,得到交点坐标函数 St&HE:  
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() SWO!E  
    '求得中心点坐标 m1o65FsY08  
Dim tt As String H1qw1[%0y
 
Dim rt(3) As Single C{,] 1X
6g  
    '判断是否平行 JU \J   
   acx = p3x - p1x UuC"-$:  
   acy = p3y - p1y (ai-n,y  
   bdx = p4x - p2x vk+%#w  
   bdy = p4y - p2y t}+c/ C%b=  
   If acx * bdy = acy * bdx Then PH%gX`N  
      rt(0) = 0 RW[<e   
      Exit Function +Qb/:xQu  
   Else pz}hh^]t  
      '判断斜率存在否 f>[;|r@K  
      If p1x = p3x And p2x <> p4x Then &0Zk3D4  
         tt = "ac_n_bd_y" (wF$"c3'{  
      ElseIf p1x <> p3x And p2x = p4x Then ! e,(Zz5  
         tt = "ac_y_bd_n" =V]i?31[  
      ElseIf p1x <> p3x And p2x <> p4x Then kGiw?~t=%  
         tt = "ac_y_bd_y" 3CuoBb8  
      End If }gRLW2&mR>  
    Select Case tt \1'R}B@;  
         Case "ac_n_bd_y" V*uu:  
            'bd线段方程 g@f/OsR76  
            k_bd = bdy / bdx K2`WcEe  
            b_bd = p2y - k_bd * p2x :!15>ML;-  
            p_x = p1x %)ov,p|  
            p_y = k_bd * p_x + b_bd -+@~*$ d  
         Case "ac_y_bd_n" ~0GX~{;r  
            'ac线段方程 ,,wx197XeD  
            k_ac = acy / acx v$/i5kcWx  
            b_ac = p1y - k_ac * p1x 'z!#E!i  
            p_x = p2x zR_l^NK  
            p_y = k_ac * p_x + b_ac qA/3uA!z  
        Case "ac_y_bd_y" r74w[6(  
           'ac，bd线段都要求 z( [$,e\  
           k_ac = acy / acx &n kGdHX/a  
           b_ac = p1y - k_ac * p1x &-Er n/[  
           k_bd = bdy / bdx u`,R0=<
4  
           b_bd = p2y - k_bd * p2x 3zF7V:XH  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) g7f%(W2dd  
           p_y = k_ac * p_x + b_ac ]=<@G.[=  
        End Select 1RHH<c%2n  
      rt(1) = p_x @|A&\a-"J  
      rt(2) = p_y O'
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     G)|HFcE  
'计算最大半径 5
z]KkPQ  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ^qr[?ky]&  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Qnh
1su5  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) i.,B 0s]Z  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 90D.G_45  
Dim bb(5) As Single o;/F=Zp  
  bb(1) = rr1 G=Bj1ss
.  
  bb(2) = rr2 RM$S|y{L  
  bb(3) = rr3 5
*Iz3vTq  
  bb(4) = rr4 5X|aa>/  
  nb = rr1 vtjG&0GSK  
For i = 1 To 4 >g=:01z9  
    If nb <= bb(i) Then o:ob1G[p%  
       nb = bb(i) Py<vN!
 
    End If ;yrcH+I$_  
Next i C,.{y`s'  
    rt(0) = Sqr(nb) Yb/
^Qk59  
    rr = rt() mt7:`-  
  End If EJY:C9W  
         m!if_Iq  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  nC w1H kW  

'D bHXS7N  
有热压工艺方面的人才或者资料分享下； <8Ad\MU  
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%C{~,7)x  

高手真多！

楼主威武霸气.