[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： +N|t:8qaf  
vU#>3[aC  
N=@8~{V.  

关键点说几个： }e>OmfxDBt  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ]C-a[  
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 PD^Cj?wm  
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 d(,M  

以下是几个重要的函数： O7f"8|=HX  
1.判断点在区域中函数 j__l'?s  
2.计算夹角函数 <07~EP  
3.转置函数 kM
76?M  
4.得到区域中心点，及区域半径函数 =BeJ.8$@VC  
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） sGGi7%  
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+QVYk"  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single w(q\75  
   cax = x2 - x1 n-CF
B:L  
   cay = y2 - y1 t28 y=nv  
   cbx = x2 - x3 wkD"EuW(  
   cby = y2 - y3 :MF+`RpL  
   mo_jj = cax * cbx + cay * cby 9gETWz(3I  
   mo_ca = Sqr(cax * cax + cay * cay) uh3<%9#\k  
   mo_cb = Sqr(cbx * cbx + cby * cby) }`_x%]EJ  
   cos_acb = mo_jj / (mo_ca * mo_cb) GAlM:>  
   'ff_cos = cos_acb -'j|U[&N\  
   If cos_acb >= 1 Then W"5VqN6v  
   nn = 0 FivqyT7i  
   ElseIf cos_acb <= -1 Then %}Z1KiRiX  
   nn = 3.14159265258979
9@YhAj  
   Else ,veI'WHMB  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) h:r:qk  
   End If 35~1$uRA  
   'ff_angle = nn #$u7:p [t  
   ff_angle = nn * 180 / 3.14159265258979 ynZfO2kf  
End Function

'判断点在区域内函数 +w(B9rH  
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 )8V=!
73  
Dim aob, boc, cod, doa, sum As Single evz@c)8  
  If ppx = p1x And ppy = p1y Then 4u7^v1/  
     point_in = True ]=(PtzVa  
     Exit Function b4>1UZGW-  
  End If 4X$|jGQ\  
  If ppx = p2x And ppy = p2y Then \mNN ) K@  
     point_in = True 1"RC!  
     Exit Function n?8xRaEf  
  End If vFi+ExBU  
   If ppx = p3x And ppy = p3y Then Eu$hC]w  
     point_in = True T0%l$#6v  
     Exit Function F;Bq[V)R  
  End If &LHS<Nv^:  
     cA B<'44R  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Ev0=m;@_  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) SF[}suL  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) H~lvUHN  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) M[7$F&&n  
    sum = aob + boc + cod + doa *+j r? |  
    If 360.01 > sum And sum > 359.99 Then (vwKC D&  
       point_in = True B;J8^esypD  
    Else hWRr#030  
       point_in = False U,Z7nH3_  
    End If 4Xe8j55  
End Function

'得到点半径,得到交点坐标函数 yMJ(Sf  
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() axz.[L_elB  
    '求得中心点坐标 xtzkgb,0[  
Dim tt As String & DhdB0Hjf  
Dim rt(3) As Single x,TnYqT^  
    '判断是否平行 `a9iq>   
   acx = p3x - p1x ma@!"Z8S  
   acy = p3y - p1y u4DrZ-v  
   bdx = p4x - p2x +3]V>Mv  
   bdy = p4y - p2y N@V:nCl  
   If acx * bdy = acy * bdx Then b8|<O:]Hp  
      rt(0) = 0 S%df'bh$  
      Exit Function L`"V_ "Q#0  
   Else o~26<Lk  
      '判断斜率存在否 Koc5~qUY]  
      If p1x = p3x And p2x <> p4x Then $Ao'mT  
         tt = "ac_n_bd_y" RhkTN'vO  
      ElseIf p1x <> p3x And p2x = p4x Then "&@{f:+  
         tt = "ac_y_bd_n" M[ ON2P;  
      ElseIf p1x <> p3x And p2x <> p4x Then W>&!~9H  
         tt = "ac_y_bd_y" ^m-w@0^z  
      End If u]&+TR  
    Select Case tt 6dhzx; A  
         Case "ac_n_bd_y" hp}JKj@  
            'bd线段方程 'ji|'x T  
            k_bd = bdy / bdx a7jE*%f9  
            b_bd = p2y - k_bd * p2x Uz%2{HB@{  
            p_x = p1x $0Un'"`S  
            p_y = k_bd * p_x + b_bd kzC4V  
         Case "ac_y_bd_n" #?'@?0<6  
            'ac线段方程 %+ytX]E  
            k_ac = acy / acx eQ<Vky^SJ  
            b_ac = p1y - k_ac * p1x nxe9^h7m  
            p_x = p2x ':]Hj8t_  
            p_y = k_ac * p_x + b_ac `@8O|j  
        Case "ac_y_bd_y" !1Nh`FN  
           'ac，bd线段都要求 rTim1<IXR  
           k_ac = acy / acx r`Dm;
@JU  
           b_ac = p1y - k_ac * p1x 5RyxVC0<  
           k_bd = bdy / bdx aev(CY,z  
           b_bd = p2y - k_bd * p2x C=JS]2W2  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 5aNvGI1  
           p_y = k_ac * p_x + b_ac cJzkA^T9  
        End Select .TNGiUzG  
      rt(1) = p_x y:Aha#<
 
      rt(2) = p_y W#\{[o  
     9(lcQuE9  
'计算最大半径 $Ww.^ym  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ?Cv([ ^Y.u  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) M9?f`9  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) fpJ%{z2  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Q;GcV&f;f  
Dim bb(5) As Single  2.'hr/.  
  bb(1) = rr1 S}qGf%  
  bb(2) = rr2 }yw>d\] f  
  bb(3) = rr3 JH*fxG  
  bb(4) = rr4 ]d.e(yCuE  
  nb = rr1 B_>r|^Vh  
For i = 1 To 4 eo^C[# .  
    If nb <= bb(i) Then l[[^]__  
       nb = bb(i) #44}Snz  
    End If ,s/laZ)V  
Next i gZ8JfA_\R(  
    rt(0) = Sqr(nb) Nw1Bn~yx<R  
    rr = rt() `> +
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  End If X$_pDF&\z  
         NdrR+t^#  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  b"nkF\P@Fj  

p<?lF  
有热压工艺方面的人才或者资料分享下； *`LrvE@t  
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 Mpco8b-b  

高手真多！

楼主威武霸气.