[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：
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ymKdRF  
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关键点说几个： ESs)|t h  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Ev()2 80  
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 ;02lmpBj  
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 @ +7'0[y?  

以下是几个重要的函数： Ki'EO$  
1.判断点在区域中函数 &v:iC u^|  
2.计算夹角函数 lu>>~vy6  
3.转置函数 oreSu;`$  
4.得到区域中心点，及区域半径函数 =v_ju;C=  
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） RH`m=?~J,  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 r2
Q"NVw  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single p0@iGyd  
   cax = x2 - x1 i P/I% D  
   cay = y2 - y1 akNJL\b  
   cbx = x2 - x3 >_5D`^  
   cby = y2 - y3 {}>"f]3  
   mo_jj = cax * cbx + cay * cby :!3P4?a  
   mo_ca = Sqr(cax * cax + cay * cay) UP,
(zKTA  
   mo_cb = Sqr(cbx * cbx + cby * cby) J+9D/VT  
   cos_acb = mo_jj / (mo_ca * mo_cb) Y&#<{j':  
   'ff_cos = cos_acb ;B7>/q;g  
   If cos_acb >= 1 Then v+\E%H  
   nn = 0 }$b/g  
   ElseIf cos_acb <= -1 Then h IGa);g  
   nn = 3.14159265258979  6E  
   Else Tp9LBF  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) / {A]('t  
   End If AKS(WNGEp  
   'ff_angle = nn 2[WQq)\  
   ff_angle = nn * 180 / 3.14159265258979 6/GhQ/T%D  
End Function

'判断点在区域内函数 )hn,rmn (P  
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 F`Pu$>8C  
Dim aob, boc, cod, doa, sum As Single +|o-lb  
  If ppx = p1x And ppy = p1y Then X.JB&~/rO  
     point_in = True bf}r8$,  
     Exit Function /0(4wZe~?  
  End If BL]^+KnP  
  If ppx = p2x And ppy = p2y Then _Jx?m  
     point_in = True EkJo.'0@  
     Exit Function  *A_  
  End If s  n?  
   If ppx = p3x And ppy = p3y Then 8^M5u>=t;  
     point_in = True {V
I%]n{M  
     Exit Function ;1"K79  
  End If 8fdOV&&D~i  
     tl#hCy  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) \Z)''
:},C  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 4}8Xoywi1  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) I]T-}pG  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) C8(sH@  
    sum = aob + boc + cod + doa X5)>yM^N`  
    If 360.01 > sum And sum > 359.99 Then &npf %Eub  
       point_in = True iPHMyxT+S  
    Else }p&aI?-B  
       point_in = False xv1$,|^ts  
    End If uV;Z  
End Function

'得到点半径,得到交点坐标函数 smk0*m4  
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() 0k3
^+#J  
    '求得中心点坐标 a3p|>M6E  
Dim tt As String &(wik#S  
Dim rt(3) As Single  eYS  
    '判断是否平行 LV9\  
   acx = p3x - p1x 783a Z8  
   acy = p3y - p1y ~PS%^zxyn  
   bdx = p4x - p2x KxiZx I  
   bdy = p4y - p2y 1OJ:Vy}n  
   If acx * bdy = acy * bdx Then t-/%|@?D  
      rt(0) = 0 .o fYFK  
      Exit Function A(<- U|  
   Else [;};qQ-C2  
      '判断斜率存在否 F7=a|g  
      If p1x = p3x And p2x <> p4x Then .H9!UQ&It  
         tt = "ac_n_bd_y" `t#C0  
      ElseIf p1x <> p3x And p2x = p4x Then tXfB.[U  
         tt = "ac_y_bd_n" p61"a,Xc  
      ElseIf p1x <> p3x And p2x <> p4x Then "%0RR?  
         tt = "ac_y_bd_y" i"_JF-IbN  
      End If en#W<"_"
  
    Select Case tt -7\RO%U  
         Case "ac_n_bd_y" W*VQ"CW{^]  
            'bd线段方程 60QElJ9D  
            k_bd = bdy / bdx -BNW\]}  
            b_bd = p2y - k_bd * p2x g[!sGa&  
            p_x = p1x yKq;EcVx  
            p_y = k_bd * p_x + b_bd ];oED?I  
         Case "ac_y_bd_n" I7]45pF  
            'ac线段方程 >Utn[']~  
            k_ac = acy / acx ~l.]3wyk  
            b_ac = p1y - k_ac * p1x g"<kj"  
            p_x = p2x ;Q-sie(#  
            p_y = k_ac * p_x + b_ac
'L=g(  
        Case "ac_y_bd_y" BXLhi(.s  
           'ac，bd线段都要求 US4X CJxB  
           k_ac = acy / acx 4|x5-m+T  
           b_ac = p1y - k_ac * p1x .bew,92  
           k_bd = bdy / bdx w[loV  
           b_bd = p2y - k_bd * p2x YIjBKh  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ./.E=,j  
           p_y = k_ac * p_x + b_ac At.WBa3j%{  
        End Select R?^FO:nM%!  
      rt(1) = p_x >uxak2nM-  
      rt(2) = p_y #F[6$. Gr  
     A@&+!sO  
'计算最大半径 8=t?rA  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 7?p%~j  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) )WuuU [(  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) YW>|gE  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) J6\<>5A?  
Dim bb(5) As Single 2<YHo{0BLS  
  bb(1) = rr1 dqPJ 2j $\  
  bb(2) = rr2 7;c{lQOj}  
  bb(3) = rr3 W9.ZhpM  
  bb(4) = rr4 trM8p  
  nb = rr1 qo4AQ}0 <  
For i = 1 To 4 pHKj*Y  
    If nb <= bb(i) Then _d)w, ;m#  
       nb = bb(i) IjD: hR@
 
    End If #_4L/LV  
Next i 7|IW\  
    rt(0) = Sqr(nb) ^!E;+o' t  
    rr = rt() 'U5 E{  
  End If KmpX^Se[  
         u~% m(  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  r{p?aG  

h`&mW w  
有热压工艺方面的人才或者资料分享下； ;(VJZ_
 
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
}5zH3MPQH  

高手真多！

楼主威武霸气.