[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： 9&e=s<6dO  
It.G-(  

描述:请输入描述

图片:2.jpg

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关键点说几个： yu8xTh$:  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ]7SX _:'*  
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 nlv8HC  
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 )+ }\NCFh  

以下是几个重要的函数： Ww8<f$  
1.判断点在区域中函数 <\i}zoPO  
2.计算夹角函数 -"m4 A0  
3.转置函数 !brXQj8D7  
4.得到区域中心点，及区域半径函数 P,.<3W"4i  
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） >^mNIfdE^=  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 k 4|*t}o7  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single uL`6}0  
   cax = x2 - x1 <zmtVE*>g  
   cay = y2 - y1 i7@qfe$fR  
   cbx = x2 - x3 `U-i{i  
   cby = y2 - y3
g.3 . C?  
   mo_jj = cax * cbx + cay * cby 'FVh/};Y.D  
   mo_ca = Sqr(cax * cax + cay * cay) 5v1f?btc  
   mo_cb = Sqr(cbx * cbx + cby * cby) lHg&|S&J  
   cos_acb = mo_jj / (mo_ca * mo_cb) )C \ %R  
   'ff_cos = cos_acb cM9z b6m  
   If cos_acb >= 1 Then !Db0r/_:G  
   nn = 0 J$Huzs#  
   ElseIf cos_acb <= -1 Then #9HQW:
On  
   nn = 3.14159265258979 w QV4[  
   Else GtYtB2U  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Dm=d   
   End If 2|J>e(&akY  
   'ff_angle = nn `gI`Cq4  
   ff_angle = nn * 180 / 3.14159265258979 *{3&?pxx  
End Function

'判断点在区域内函数 MjGeH>c  
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 XaFu(Xu7  
Dim aob, boc, cod, doa, sum As Single - v\n0Jt  
  If ppx = p1x And ppy = p1y Then %}t<,ex(yO  
     point_in = True {Q/XV=  
     Exit Function <IiX_*  
  End If ?kOtK  
  If ppx = p2x And ppy = p2y Then *-KgU'u?  
     point_in = True |nfFI  
     Exit Function < 5%:/j  
  End If Tt,<@U[/}  
   If ppx = p3x And ppy = p3y Then +9 Uo<6}  
     point_in = True 942(a  
     Exit Function QG~4<zy  
  End If (%\vp**F  
     fn
6;  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) b<]--\  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) D{%l 4og  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) fc}G6P;3{  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) D1Yc_  
    sum = aob + boc + cod + doa u}zCcWP|L  
    If 360.01 > sum And sum > 359.99 Then eB]cPo4gW  
       point_in = True Q
ktj  
    Else _?9|0>]xG  
       point_in = False 2`D1cX  
    End If dNQR<v\IL  
End Function

'得到点半径,得到交点坐标函数 m)5,ut/  
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() '<
Nhq_u{  
    '求得中心点坐标 >8I?YT.  
Dim tt As String !B&OK&*  
Dim rt(3) As Single 7Wd}H Z  
    '判断是否平行 3M5+!H  
   acx = p3x - p1x #84<aM  
   acy = p3y - p1y V^n?0^o  
   bdx = p4x - p2x J}$St|1y  
   bdy = p4y - p2y wt8?@lJ"/  
   If acx * bdy = acy * bdx Then C-vFl[@a0  
      rt(0) = 0 /7s^OkQ  
      Exit Function [,s{/32s  
   Else ~1_v;LhH5+  
      '判断斜率存在否 COV8=E~  
      If p1x = p3x And p2x <> p4x Then G
Fq,Ca~  
         tt = "ac_n_bd_y" L7\rx
w  
      ElseIf p1x <> p3x And p2x = p4x Then fyRSg B00$  
         tt = "ac_y_bd_n" -E*VF{IG1  
      ElseIf p1x <> p3x And p2x <> p4x Then qy]tuKZI  
         tt = "ac_y_bd_y" K *<+K<Tp  
      End If 2j9+ f{ l  
    Select Case tt XZ|%9#6  
         Case "ac_n_bd_y" 4pYscB  
            'bd线段方程 .(RX;.lw  
            k_bd = bdy / bdx vlygS(Y_7  
            b_bd = p2y - k_bd * p2x E%B:6
 
            p_x = p1x e`N/3q7  
            p_y = k_bd * p_x + b_bd fFr[ &\[  
         Case "ac_y_bd_n" [iT*L)R4  
            'ac线段方程 xsPY#  
            k_ac = acy / acx SxAZ2|/-  
            b_ac = p1y - k_ac * p1x 4
[&L<D6h  
            p_x = p2x EFd9n  
            p_y = k_ac * p_x + b_ac T-;|E^  
        Case "ac_y_bd_y" '@jP$6T&  
           'ac，bd线段都要求 /Dmuvb|A  
           k_ac = acy / acx l r16*2.  
           b_ac = p1y - k_ac * p1x +2qC
H^80  
           k_bd = bdy / bdx L0sb[:'luz  
           b_bd = p2y - k_bd * p2x q6A"+w,N  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) C0RnBu  
           p_y = k_ac * p_x + b_ac <-Hw@g  
        End Select )BJZ{E*  
      rt(1) = p_x V2v}F=  
      rt(2) = p_y \dB)G<_  
     li4"|T&  
'计算最大半径 a 8(mU%  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) `oPUf!  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) _J N$zZ{  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) s<GR ?  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) AW\#)Em  
Dim bb(5) As Single v`G[6Z  
  bb(1) = rr1 i_[nW  
  bb(2) = rr2 dTATJ)NH  
  bb(3) = rr3 y)Y0SY1\j  
  bb(4) = rr4 l-~ o&n  
  nb = rr1 a7Xa3 vlpO  
For i = 1 To 4 h#e((j3-2Z  
    If nb <= bb(i) Then rQrh(~\:  
       nb = bb(i) y}.?`/Q#  
    End If x_k@hGSC  
Next i 6 _Cc+}W  
    rt(0) = Sqr(nb) HZ_,f"22  
    rr = rt() ;7 F'xz
"  
  End If qsUob  
         GIs *;ps7w  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  q n2X._`  

6%8,OOS  
有热压工艺方面的人才或者资料分享下； p0b2n a !  
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 2uajK..b  

高手真多！

楼主威武霸气.