[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： f<Xi/(  
t+2,;G  
MRa |<yK  

关键点说几个： ;*q  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Gu5%Pou  
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 T5? eb"  
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 BiCC72oig  

以下是几个重要的函数： :JfT&YYi"  
1.判断点在区域中函数 g"|Z1iy|9  
2.计算夹角函数 Oj0,Urs7  
3.转置函数 CT#u+]T  
4.得到区域中心点，及区域半径函数 $}z%}v  
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） khS >  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 #F25,:hY  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single O[v(kH'  
   cax = x2 - x1 &#DKB#.2  
   cay = y2 - y1 E;)7#3gY1  
   cbx = x2 - x3 qTi%].F"G  
   cby = y2 - y3 2%gLq  
   mo_jj = cax * cbx + cay * cby d|RDx;rl8  
   mo_ca = Sqr(cax * cax + cay * cay) i)mQ?Y#o  
   mo_cb = Sqr(cbx * cbx + cby * cby) e!.r- v9  
   cos_acb = mo_jj / (mo_ca * mo_cb) E!}~j  
   'ff_cos = cos_acb VFjNrngl  
   If cos_acb >= 1 Then J4>k9~q  
   nn = 0 Mr u  
   ElseIf cos_acb <= -1 Then +y\mlfJ.-b  
   nn = 3.14159265258979 +u]L#].;  
   Else =VPJ m\*V  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) LG>lj$hO  
   End If SRBQ"X[M2  
   'ff_angle = nn Sz3Tp5b  
   ff_angle = nn * 180 / 3.14159265258979 YDoVm?  
End Function

'判断点在区域内函数
W^Z#_{  
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 YKWtsy  
Dim aob, boc, cod, doa, sum As Single ,)](h+zl_6  
  If ppx = p1x And ppy = p1y Then I@9[  
     point_in = True 3,4m|Z2)  
     Exit Function dp'xd>m  
  End If \qB
:z7I2  
  If ppx = p2x And ppy = p2y Then Mw9;O6  
     point_in = True [Adk
j  
     Exit Function Wi3St`$  
  End If u&\QZW?  
   If ppx = p3x And ppy = p3y Then C#Y_La  
     point_in = True [yf&]0  
     Exit Function A:5B6Z  
  End If qsTB)RdjP%  
     Q\k|pg?  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) !w #x@6yq  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) iZbY@-3fc  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) cc_v4d{x  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 6y d/3k  
    sum = aob + boc + cod + doa ,oS<9kC68  
    If 360.01 > sum And sum > 359.99 Then jUg.Y98  
       point_in = True  #:st>V_h  
    Else %L;;W,l$`)  
       point_in = False Sx|)GTJJ|-  
    End If g9K7_T #W  
End Function

'得到点半径,得到交点坐标函数 }W)c-91  
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() 2^.qKY@g@  
    '求得中心点坐标 X \GB:#:X  
Dim tt As String +#IsRiH%>  
Dim rt(3) As Single qJ8@A}}8  
    '判断是否平行 c
6"hk_  
   acx = p3x - p1x @+(TM5Ub  
   acy = p3y - p1y 7UzbS,$x  
   bdx = p4x - p2x M^twD*  
   bdy = p4y - p2y \gE6KE<?p  
   If acx * bdy = acy * bdx Then WUnmUW[/  
      rt(0) = 0 X;D"}X4(E  
      Exit Function Pm*N!:u  
   Else K9 tuiD+j  
      '判断斜率存在否 \vR&-+8dk  
      If p1x = p3x And p2x <> p4x Then /Q8glLnM  
         tt = "ac_n_bd_y" >lg-j-pV  
      ElseIf p1x <> p3x And p2x = p4x Then *#
n?6KqZ  
         tt = "ac_y_bd_n" XKEd~2h<y  
      ElseIf p1x <> p3x And p2x <> p4x Then @=kDaPme92  
         tt = "ac_y_bd_y" ,b/qcu_|-  
      End If A,4|UA?-  
    Select Case tt E)h&<{%  
         Case "ac_n_bd_y" 6JYVC>i  
            'bd线段方程 00d<V:Aoy  
            k_bd = bdy / bdx k25:H[   
            b_bd = p2y - k_bd * p2x ?h*Ngb
j>  
            p_x = p1x 0M^v%22  
            p_y = k_bd * p_x + b_bd ARt+"[.*p  
         Case "ac_y_bd_n" 'Lb-+X,  
            'ac线段方程 E"|LA[o  
            k_ac = acy / acx /y.+N`_  
            b_ac = p1y - k_ac * p1x cJ> #jl&  
            p_x = p2x Eoo[)V#x{  
            p_y = k_ac * p_x + b_ac 6zfi\(fop  
        Case "ac_y_bd_y" I
2R" Y<  
           'ac，bd线段都要求 t
|ih{0  
           k_ac = acy / acx &1:_+  
           b_ac = p1y - k_ac * p1x $aFCe}3b<  
           k_bd = bdy / bdx uR:@7n  
           b_bd = p2y - k_bd * p2x @D3Y}nR:  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) xpb,Nzwt^  
           p_y = k_ac * p_x + b_ac }{(dG7G+  
        End Select 9Un3La8PX  
      rt(1) = p_x H(~:Ajj+zQ  
      rt(2) = p_y S1B^FLe7X  
     s$,gM,|cK  
'计算最大半径 3wQUNv0z  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) l; ._ ?H  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 
oJLpFL  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) &H`AS6  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Wt%+q{  
Dim bb(5) As Single <Xsy{7  
  bb(1) = rr1 HL^+:`,  
  bb(2) = rr2 =y$|2(6  
  bb(3) = rr3 "GTlJqhk  
  bb(4) = rr4 1zDat@<H  
  nb = rr1 (zO)J`z>  
For i = 1 To 4 v%=@_`Ht  
    If nb <= bb(i) Then b85r=tm   
       nb = bb(i) m@z.H;  
    End If _=wu>h&7  
Next i Lcx)wof  
    rt(0) = Sqr(nb) w4m)lQM  
    rr = rt() l=*60Ag\J~  
  End If );]9M~$  
         nI_43rG:Uf  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  F&Bh\C)]  

Z}8khNCYr  
有热压工艺方面的人才或者资料分享下； XTibx;yd<  
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 ou{}\^DgQ  

高手真多！

楼主威武霸气.