[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>S;[~S7  
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关键点说几个： =6woWlfb  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） "nZ*{uv  
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 H:!7:  
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 Z&ZP"P4  

以下是几个重要的函数： MG[o%I96  
1.判断点在区域中函数 1v,Us5s<"6  
2.计算夹角函数 j2Tr$gx<  
3.转置函数 @|<<H3I  
4.得到区域中心点，及区域半径函数 *4_jA](  
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） (EK"V';  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 !lEY=1nHOJ  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 350_CN,  
   cax = x2 - x1 n3}!p'-CC  
   cay = y2 - y1 wB.Nn/p  
   cbx = x2 - x3 wSb1"a  
   cby = y2 - y3 b`)){LR  
   mo_jj = cax * cbx + cay * cby /GIxR6i  
   mo_ca = Sqr(cax * cax + cay * cay) (Q%'N3gk  
   mo_cb = Sqr(cbx * cbx + cby * cby) 1&^MfP}  
   cos_acb = mo_jj / (mo_ca * mo_cb)  -QOw8vm  
   'ff_cos = cos_acb ,S'p%g  
   If cos_acb >= 1 Then \cC%!4  
   nn = 0 ,oaw0Vw  
   ElseIf cos_acb <= -1 Then Gqcq,_?gt  
   nn = 3.14159265258979 AgV G`q  
   Else _Dym{!t  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 6:q"l\n>  
   End If dY@WI[yog  
   'ff_angle = nn GytXFL3`:  
   ff_angle = nn * 180 / 3.14159265258979 ]4h92\\965  
End Function

'判断点在区域内函数 IX*
idcxR  
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 w=LP"bqlI  
Dim aob, boc, cod, doa, sum As Single f 1w~!O9  
  If ppx = p1x And ppy = p1y Then (>`5z(X  
     point_in = True H|RT?Q  
     Exit Function X5X?&* %{  
  End If f>piHh?  
  If ppx = p2x And ppy = p2y Then 9AxCiT.  
     point_in = True U+)xu>I  
     Exit Function LbaK={tR  
  End If R zf  
   If ppx = p3x And ppy = p3y Then M9y<t'
  
     point_in = True ?T>'j mmV=  
     Exit Function BNd^qB ?  
  End If @O
@GRq&V  
     3 n'V\Hvz  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 0PU8#2pR  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) J9\a{c;.  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ({JHZ6uZ  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) @J5Jpt*IE  
    sum = aob + boc + cod + doa )RO<o O  
    If 360.01 > sum And sum > 359.99 Then qduWzxB  
       point_in = True K'X2dG*  
    Else taFn![}/!g  
       point_in = False H^.IY_I`U*  
    End If -1ce<nN  
End Function

'得到点半径,得到交点坐标函数 dn}`i  
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() d
'/TdVM  
    '求得中心点坐标 5v?;PX  
Dim tt As String c>/
. ;p  
Dim rt(3) As Single Pb8^ b  
    '判断是否平行 q^A+<d  
   acx = p3x - p1x "TUe%o  
   acy = p3y - p1y GrTulN?  
   bdx = p4x - p2x $KLD2BAL  
   bdy = p4y - p2y >m#e:[N  
   If acx * bdy = acy * bdx Then KN?6;G{  
      rt(0) = 0 ,RgB$TcE  
      Exit Function 8E4mA5@  
   Else 81hbk((  
      '判断斜率存在否 ^2$ lJ
  
      If p1x = p3x And p2x <> p4x Then 3/b;7\M  
         tt = "ac_n_bd_y" =xNv\e  
      ElseIf p1x <> p3x And p2x = p4x Then esHQoIhd  
         tt = "ac_y_bd_n" \mw(cM#:  
      ElseIf p1x <> p3x And p2x <> p4x Then  ;b`[&g  
         tt = "ac_y_bd_y" >[Ye  
      End If 63.wL0~  
    Select Case tt )r[&RGz6  
         Case "ac_n_bd_y" ?Q-h n:F)  
            'bd线段方程 @FC"nM  
            k_bd = bdy / bdx n @?4b8"  
            b_bd = p2y - k_bd * p2x PH*\AZJCl  
            p_x = p1x k6Uc3O  
            p_y = k_bd * p_x + b_bd Vpr/  
         Case "ac_y_bd_n" o/C\d$i'  
            'ac线段方程 9_QP!,  
            k_ac = acy / acx uA$<\fnz
  
            b_ac = p1y - k_ac * p1x H-3Eo
#b#  
            p_x = p2x bu=?N  
            p_y = k_ac * p_x + b_ac 6m VuyI  
        Case "ac_y_bd_y" etoo #h"]1  
           'ac，bd线段都要求 sTOa  
           k_ac = acy / acx
8E8N6  
           b_ac = p1y - k_ac * p1x WHAQu]{  
           k_bd = bdy / bdx +uBLk0/)>  
           b_bd = p2y - k_bd * p2x *loOiM\5a  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) UjOB98Du  
           p_y = k_ac * p_x + b_ac $t5V=}m>  
        End Select 3Wwj p  
      rt(1) = p_x [kqYfY?K  
      rt(2) = p_y :>aQ~1f>]  
     <\0vR20/  
'计算最大半径 r1<F  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) T]j.=|,d  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 'S2bp4G  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) r?CI)Y;  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) *26334B.R  
Dim bb(5) As Single })w*m  
  bb(1) = rr1 oW^*l#v  
  bb(2) = rr2 9}c8Xt^&  
  bb(3) = rr3 3:{yJdpg  
  bb(4) = rr4 R/^u/~<  
  nb = rr1 V97,1`  
For i = 1 To 4 CiR%Ujf  
    If nb <= bb(i) Then it>r+%  
       nb = bb(i) A<\JQ  
    End If 11|Rdd+}  
Next i f50L,4,  
    rt(0) = Sqr(nb) Y-'78BJk  
    rr = rt() * ,v|y6  
  End If VdP`a(Yd;  
         5@hNnh16  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  m}$+Hdk+7  

ZyR_6n>L$  
有热压工艺方面的人才或者资料分享下； U,1AfzlF  
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 ,pK|SL  

高手真多！

楼主威武霸气.