[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： 3B{[%#vO  
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描述:请输入描述

图片:2.jpg

sqpGrW.  

关键点说几个： ;`(R7X *3  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） xWE8Wm  
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 \Q&,ISO\  
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 `8:Kp  

以下是几个重要的函数： osHCg  
1.判断点在区域中函数 p &(OZJT  
2.计算夹角函数 |L
::bx(  
3.转置函数 KE}H&1PjU  
4.得到区域中心点，及区域半径函数 bw4oLu?  
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） S%mfs!E>  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ?GT@puJS-  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 1X1 NtS@  
   cax = x2 - x1 K^[#]+nQ  
   cay = y2 - y1 ,!#ccv+Vm%  
   cbx = x2 - x3 n,'OiVl[  
   cby = y2 - y3 l$xxrb9P!  
   mo_jj = cax * cbx + cay * cby ,*svtw:2')  
   mo_ca = Sqr(cax * cax + cay * cay) G"SBYU  
   mo_cb = Sqr(cbx * cbx + cby * cby) Wp0 Dq(  
   cos_acb = mo_jj / (mo_ca * mo_cb) 2 QTZwx  
   'ff_cos = cos_acb 9N8I ip]w  
   If cos_acb >= 1 Then `~BZ1)@  
   nn = 0 An`3Ex[  
   ElseIf cos_acb <= -1 Then kOL'|GgK  
   nn = 3.14159265258979 m#!=3P7T  
   Else 1bnBji  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1)
s1N?/>lmB  
   End If N)2f7j4C&  
   'ff_angle = nn -~{c u47_  
   ff_angle = nn * 180 / 3.14159265258979 zYER  
End Function

'判断点在区域内函数 `r"+644  
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 Uu s.  
Dim aob, boc, cod, doa, sum As Single  uF|3/x=  
  If ppx = p1x And ppy = p1y Then p{A}pnjf  
     point_in = True ,_.I\
EY[  
     Exit Function nQX+pkJ  
  End If zET^T5>:  
  If ppx = p2x And ppy = p2y Then {P%9  
     point_in = True yOU(2"8p  
     Exit Function 7c
P@jj  
  End If r|Z3$J{^"  
   If ppx = p3x And ppy = p3y Then Qj{8?lew  
     point_in = True !^#jwRpeN  
     Exit Function 1@48BN8cm'  
  End If z /KK)u(q  
     $,=6[T!z+e  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ia&AW  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) @}p2aV59  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) t.8 GT&p  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) RcG0 8p.)  
    sum = aob + boc + cod + doa wcSyw2D  
    If 360.01 > sum And sum > 359.99 Then {'sY|lou  
       point_in = True e1(Q(3  
    Else NL=|z=q  
       point_in = False {
N2g8W:  
    End If g6@Fp7T  
End Function

'得到点半径,得到交点坐标函数 Wt)Drv{@ {  
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() 0nn okN^  
    '求得中心点坐标 WARb"8Kg  
Dim tt As String +a&p$\  
Dim rt(3) As Single hT$~ygQ  
    '判断是否平行 ]-oJ[5cQ0v  
   acx = p3x - p1x |b-9b&  
   acy = p3y - p1y !TZhQiorC  
   bdx = p4x - p2x V@>r*7\F  
   bdy = p4y - p2y Qy<[7  
   If acx * bdy = acy * bdx Then ;Op3?_  
      rt(0) = 0 ,fK3ZC  
      Exit Function /{wJEuE  
   Else LmlXMia  
      '判断斜率存在否 sK{l 9  
      If p1x = p3x And p2x <> p4x Then D3|oOOoG  
         tt = "ac_n_bd_y" A(?\>X 9g  
      ElseIf p1x <> p3x And p2x = p4x Then JdIlWJY  
         tt = "ac_y_bd_n" 4h@Z/G!T3
 
      ElseIf p1x <> p3x And p2x <> p4x Then .s#;s'>g  
         tt = "ac_y_bd_y" &_JD)mM5  
      End If o]nw0q?  
    Select Case tt m(], r})  
         Case "ac_n_bd_y" `_b`kzJ  
            'bd线段方程 uwRr LF  
            k_bd = bdy / bdx +/#Ei'do  
            b_bd = p2y - k_bd * p2x
1;Pv0&[q/  
            p_x = p1x R'
kyrEO  
            p_y = k_bd * p_x + b_bd /Q,{?';~  
         Case "ac_y_bd_n" G
pm{m:$L  
            'ac线段方程 |F9z,cc"  
            k_ac = acy / acx b-3*Nl_%  
            b_ac = p1y - k_ac * p1x GUF"<k  
            p_x = p2x Bo<>e~6P  
            p_y = k_ac * p_x + b_ac wApMzZ(X2y  
        Case "ac_y_bd_y" !61Pl/uQ  
           'ac，bd线段都要求 Pnd`=%w%]  
           k_ac = acy / acx nW;g2
8  
           b_ac = p1y - k_ac * p1x D;UV&.$'v  
           k_bd = bdy / bdx dt~YW  
           b_bd = p2y - k_bd * p2x nXjP
x@  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) kId n6 Wx,  
           p_y = k_ac * p_x + b_ac 5K|"\  
        End Select :>p8zG  
      rt(1) = p_x mhW-J6u*  
      rt(2) = p_y ##Z_QB(;  
     7' S@3
 
'计算最大半径 F)z;Z6{t4  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ,39aF*r1Q  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) _fZZ_0\Q  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) =]-j;#'&  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) )xb|3&+W  
Dim bb(5) As Single >J|]moSVA  
  bb(1) = rr1 k</%YKk  
  bb(2) = rr2 v)2M1  
  bb(3) = rr3 %cE2s`  
  bb(4) = rr4 |+`c3*PV  
  nb = rr1 -=.V '  
For i = 1 To 4 6sa"O89  
    If nb <= bb(i) Then N)&4Hy  
       nb = bb(i) 3Vp#a:  
    End If ;<0LXYL;  
Next i gKOOHUCb
 
    rt(0) = Sqr(nb) U%h);!<  
    rr = rt() ?|:BuHkT  
  End If lo'W1p  
         ' oFxR003  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  -l}IZY  

moVbw`T  
有热压工艺方面的人才或者资料分享下； }h 3K@R   
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 7H>@iI"?  

高手真多！

楼主威武霸气.