[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： <@;Y.76~  
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关键点说几个： ,TuDG*Y
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1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） W/dl`UDY  
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 qPgLSZv  
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  T~I5W=y  

以下是几个重要的函数： Fv n:V\eb  
1.判断点在区域中函数 JX_hLy@`  
2.计算夹角函数 *Vk%"rwaG  
3.转置函数 WBS~e  
4.得到区域中心点，及区域半径函数 i#I+    
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） aL\vQ(1zO  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 N>z<v\
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Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single +QcgLq  
   cax = x2 - x1 O[O`4de9  
   cay = y2 - y1 w3lR8R]  
   cbx = x2 - x3 ZKKz?reM'  
   cby = y2 - y3 8y;W+I(71  
   mo_jj = cax * cbx + cay * cby l"%|VWZ{iq  
   mo_ca = Sqr(cax * cax + cay * cay) 4&r+K`C0  
   mo_cb = Sqr(cbx * cbx + cby * cby) Kg0Vbzvb  
   cos_acb = mo_jj / (mo_ca * mo_cb) V|.3Z\(  
   'ff_cos = cos_acb H\A!oB,sw  
   If cos_acb >= 1 Then HC,YmO:df"  
   nn = 0 ODn6%fp%  
   ElseIf cos_acb <= -1 Then O!+LM{> F  
   nn = 3.14159265258979 B9`^JYT<  
   Else p"4i(CWGS  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) k|W=kt$P  
   End If mx@F^  
   'ff_angle = nn uSSnr#i^j  
   ff_angle = nn * 180 / 3.14159265258979 ~@ZdO+n?  
End Function

'判断点在区域内函数 910Ym!\{:  
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 T^h;T{H2  
Dim aob, boc, cod, doa, sum As Single O@[c
*3]e  
  If ppx = p1x And ppy = p1y Then :A35?9E?  
     point_in = True [.DSY[!8U  
     Exit Function `6V-a_8;[  
  End If
uG2(NwOL  
  If ppx = p2x And ppy = p2y Then v)@EK6Nty  
     point_in = True 4,L(  
     Exit Function ~S}>|q$  
  End If <1[WNj2[  
   If ppx = p3x And ppy = p3y Then q;3,}emg  
     point_in = True Gv[W)+3f  
     Exit Function :+ksmyW  
  End If 4?XX_=+F|  
     l c)*HY
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    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) dw,Nlf~*0  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) pq[RH-{  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) p D!IB`cA4  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) %C=^ h1t%  
    sum = aob + boc + cod + doa K7}EL|Kx  
    If 360.01 > sum And sum > 359.99 Then KNU/Kc#  
       point_in = True 24{!j[,q@  
    Else V-a/%
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       point_in = False .{D[!Dp#h  
    End If ?&Si P-G  
End Function

'得到点半径,得到交点坐标函数 }xTTz,Oj$  
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() y [e$  
    '求得中心点坐标 uy\<t  
Dim tt As String N8(xz-6  
Dim rt(3) As Single kRNr`yfN  
    '判断是否平行 [dFxW6n  
   acx = p3x - p1x `*e',j2}UU  
   acy = p3y - p1y ^_3idLE  
   bdx = p4x - p2x rb%P30qc4  
   bdy = p4y - p2y jPYed@[+  
   If acx * bdy = acy * bdx Then uRG0}>]|U  
      rt(0) = 0 (:E_m|00;  
      Exit Function e:{v.C0ez  
   Else Vnuz! 6.  
      '判断斜率存在否 Py\xN  
      If p1x = p3x And p2x <> p4x Then STu!v5XY}-  
         tt = "ac_n_bd_y" ,(Fo%.j  
      ElseIf p1x <> p3x And p2x = p4x Then a`(6hL3IT  
         tt = "ac_y_bd_n" @& #df  
      ElseIf p1x <> p3x And p2x <> p4x Then $s.:wc^  
         tt = "ac_y_bd_y" v=nq P{  
      End If |J2_2a/"  
    Select Case tt !>b>"\b  
         Case "ac_n_bd_y" qa#Fa)g*  
            'bd线段方程 6PT ,m  
            k_bd = bdy / bdx K"Vv=  
            b_bd = p2y - k_bd * p2x c#nFm&}dm  
            p_x = p1x `;WiTE)&)  
            p_y = k_bd * p_x + b_bd >i~W$;t  
         Case "ac_y_bd_n" /S1EQ%_  
            'ac线段方程 *#e%3N05_  
            k_ac = acy / acx Da1BxbDeI  
            b_ac = p1y - k_ac * p1x o%X_V!B{V  
            p_x = p2x 7CYu"+Ea  
            p_y = k_ac * p_x + b_ac R'qB-v.  
        Case "ac_y_bd_y" %1SA!1>j  
           'ac，bd线段都要求 1i#uKKwE  
           k_ac = acy / acx NUiZ!&  
           b_ac = p1y - k_ac * p1x ~\4l*$3(^  
           k_bd = bdy / bdx LtbL[z>]  
           b_bd = p2y - k_bd * p2x ZgF
-.(GV  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) m9ts&b+TE  
           p_y = k_ac * p_x + b_ac ,kuJWaUC@  
        End Select tY !fO>Fn~  
      rt(1) = p_x @=`Dw/13  
      rt(2) = p_y m9Gyjr'L  
     v 2k/tT$t  
'计算最大半径 Z"'rc.>a  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ?{%P9I  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) b>;>*'e  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) fJLlz$H  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) \+fP&  
Dim bb(5) As Single j(F%uUpN  
  bb(1) = rr1 'x<gC"0A  
  bb(2) = rr2 #9}KC 9f  
  bb(3) = rr3 ]Rohf WHX  
  bb(4) = rr4 xr?=gY3E;  
  nb = rr1 " jn@S-  
For i = 1 To 4 PKT0Drv}c7  
    If nb <= bb(i) Then cy*Td7)/  
       nb = bb(i) xb0hJ~e  
    End If _X;^'mqf~  
Next i y;Q_8|,F  
    rt(0) = Sqr(nb) 3!Zd]1$  
    rr = rt() Smo^/K`f9  
  End If GV6!
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         WRZi^B8@  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  |rH;}t|un  

-. L)-%wIV  
有热压工艺方面的人才或者资料分享下； as)2ny!u  
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 @SDsd^N{2P  

高手真多！

楼主威武霸气.