[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： O)dnr8*  
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描述:请输入描述

图片:2.jpg

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关键点说几个： 1ubu~6  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） xv]z>4@z,  
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 `LkrG9KV{  
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 ` i[26Qb  

以下是几个重要的函数： 1clzDwW  
1.判断点在区域中函数 q'jOI_b  
2.计算夹角函数 p\[!=ZXFr\  
3.转置函数 Z|qI[uiO  
4.得到区域中心点，及区域半径函数 u#ya 8  
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） 8-G )lyfj  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 "r6qFxY  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Pim  
   cax = x2 - x1 _f!ko<52  
   cay = y2 - y1 1:eWZ]B5"  
   cbx = x2 - x3 O8Mypv/C  
   cby = y2 - y3 'ON/WKJr|W  
   mo_jj = cax * cbx + cay * cby (%R%UkwP9  
   mo_ca = Sqr(cax * cax + cay * cay) +Ug &  
   mo_cb = Sqr(cbx * cbx + cby * cby) 8$-MUF,  
   cos_acb = mo_jj / (mo_ca * mo_cb) *A9v8$  
   'ff_cos = cos_acb HK[%'OQ  
   If cos_acb >= 1 Then ^$oa`B^2JM  
   nn = 0 S\Z*7j3;M  
   ElseIf cos_acb <= -1 Then 1XN%&VR>^D  
   nn = 3.14159265258979 'N{1b_v?  
   Else l i<9nMZ<  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) =)bOteWM  
   End If IEm?'o:  
   'ff_angle = nn 7}xQ4M\u$  
   ff_angle = nn * 180 / 3.14159265258979 lZwjrU| _  
End Function

'判断点在区域内函数 7'+`vt#E  
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 j&DlI_  
Dim aob, boc, cod, doa, sum As Single  e$  
  If ppx = p1x And ppy = p1y Then u9;3Xn8  
     point_in = True e`+  
     Exit Function GGHMpQ   
  End If ~a=]w#-KD  
  If ppx = p2x And ppy = p2y Then ';eAaDM  
     point_in = True []\-*{^r  
     Exit Function pe[huYE  
  End If <> =(BAw  
   If ppx = p3x And ppy = p3y Then g?1bEOA!  
     point_in = True (6[<+j&.  
     Exit Function KXTk.\c  
  End If *)r_Y|vg  
     =2Ju)!%wr  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) |x.[*'X@  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) !@gjIYq
_Y  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) f[zKA{R  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) k5&}bj-  
    sum = aob + boc + cod + doa \ bNDeA&l  
    If 360.01 > sum And sum > 359.99 Then jhG6,;1zMI  
       point_in = True `iuQ.I  
    Else d}E6d||A  
       point_in = False 3Mh_&%
!O  
    End If D{]w+  
End Function

'得到点半径,得到交点坐标函数 MoC/xF&  
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() -J!k|GK#MX  
    '求得中心点坐标 #z}IW(u<  
Dim tt As String 0/+TQD!L  
Dim rt(3) As Single {flxZ}  
    '判断是否平行
;f3))x  
   acx = p3x - p1x >48)@sS  
   acy = p3y - p1y p'SY 2xq-,  
   bdx = p4x - p2x $>~4RXC  
   bdy = p4y - p2y RV5;EM)~[  
   If acx * bdy = acy * bdx Then Re\V<\$J  
      rt(0) = 0 t;%MSedn  
      Exit Function UJX5}36  
   Else AQBr{^inH|  
      '判断斜率存在否 p t{/|P  
      If p1x = p3x And p2x <> p4x Then cRPy5['E  
         tt = "ac_n_bd_y" cMt , 80  
      ElseIf p1x <> p3x And p2x = p4x Then 4s&koH(x  
         tt = "ac_y_bd_n" ]kkH|b$[T  
      ElseIf p1x <> p3x And p2x <> p4x Then ;S>ml  
         tt = "ac_y_bd_y" QEL3b4Vm  
      End If +QrbW  
    Select Case tt .=b)Ae c  
         Case "ac_n_bd_y" hzk]kM/OC  
            'bd线段方程 m
K7egAo  
            k_bd = bdy / bdx _
{gRCR)  
            b_bd = p2y - k_bd * p2x _1Iw"K49Qx  
            p_x = p1x l3/?,xn  
            p_y = k_bd * p_x + b_bd T xwZ3E  
         Case "ac_y_bd_n" ~_L_un.R  
            'ac线段方程  F_%&,"$  
            k_ac = acy / acx FU~:9EEx  
            b_ac = p1y - k_ac * p1x W[W}:@KZ  
            p_x = p2x z+@Jx~<i  
            p_y = k_ac * p_x + b_ac b{d@:"  
        Case "ac_y_bd_y" [318Q%W&  
           'ac，bd线段都要求 ~4tu*\P  
           k_ac = acy / acx ;i&'va$  
           b_ac = p1y - k_ac * p1x gTP0:  
           k_bd = bdy / bdx C}GOwvAL>  
           b_bd = p2y - k_bd * p2x *FUbKr0  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) [<{+tAdn)  
           p_y = k_ac * p_x + b_ac  bR5+({yH  
        End Select AA,n.;zy<  
      rt(1) = p_x G_x<2E"d  
      rt(2) = p_y V`"A|Y  
     Y;XEC;PXD  
'计算最大半径 oW/ #/;|`  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) rfMzHY}%  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) gg%OOvaj5  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) MkG*6A  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) P\CT|K'P  
Dim bb(5) As Single O9W|&LAL  
  bb(1) = rr1 Nu'T0LPNq(  
  bb(2) = rr2 /g!', r,  
  bb(3) = rr3 cA4xx^~  
  bb(4) = rr4 (a i&v  
  nb = rr1 M1T)e9k=x  
For i = 1 To 4 *G#W],~0  
    If nb <= bb(i) Then ZK@ENfG  
       nb = bb(i) h~ =UFE%'  
    End If V}kZowWD  
Next i .qCD(XZ+  
    rt(0) = Sqr(nb) q~=]_PMP  
    rr = rt() 50.cMms  
  End If
.5zqpm  
         E(oI0*S.5  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  4hep1Kz%  

UGK4uK+I`  
有热压工艺方面的人才或者资料分享下； K'EGm #I  
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 @bQf =N+  

高手真多！

楼主威武霸气.