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    [分享]绝对随机网点分布(excel之vba) [复制链接]

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    离线safeng1122
     
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    只看楼主 倒序阅读 楼主  发表于: 2013-04-08
    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: 5{d\u E%'p  
    .Pe9_ZH$W  
    %y&]'A  
     
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    离线safeng1122
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    只看该作者 1楼 发表于: 2013-04-08
    关键点说几个: JBC$Ku  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) "B{ECM;  
    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 ibpzeuUl  
    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 :K':P5i  
    离线safeng1122
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    只看该作者 2楼 发表于: 2013-04-08
    以下是几个重要的函数: 17|np2~  
    1.判断点在区域中函数 'zZcn" +!  
    2.计算夹角函数 \.uc06  
    3.转置函数 $HJTj29/  
    4.得到区域中心点,及区域半径函数 - nbMTY}  
    5.再有就是若干个点抽取其中一部分;或者采用随机分布(该方法会有重合点,所以没采用) p|+B3  
    6.文件开启与关闭,这个最常见了,就不说了
    离线safeng1122
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    只看该作者 3楼 发表于: 2013-04-08
    '计算夹角函数 S6d`ioi-  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 69K{+|  
       cax = x2 - x1 n5-)/R[z  
       cay = y2 - y1 S8d8%R~1=h  
       cbx = x2 - x3 kq=V4-a[  
       cby = y2 - y3 Sh6JF574T  
       mo_jj = cax * cbx + cay * cby X-LA}YH=tS  
       mo_ca = Sqr(cax * cax + cay * cay) `d]IX^;  
       mo_cb = Sqr(cbx * cbx + cby * cby) |RkcDrB~  
       cos_acb = mo_jj / (mo_ca * mo_cb) S~Z|PLtF  
       'ff_cos = cos_acb MPgS!V1  
       If cos_acb >= 1 Then 4Y> Yi*n  
       nn = 0 %V`F!D<D  
       ElseIf cos_acb <= -1 Then y&m0Lz53Z  
       nn = 3.14159265258979 %xZG*2vc!B  
       Else '*^yAlgtt  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) iIT8H\e  
       End If F>je4S;  
       'ff_angle = nn X~=xXN.  
       ff_angle = nn * 180 / 3.14159265258979 -|k)tvAm  
    End Function
    离线safeng1122
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    只看该作者 4楼 发表于: 2013-04-08
    '判断点在区域内函数 H=*5ASc  
    Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean `p b5*h6r!  
    Dim aob, boc, cod, doa, sum As Single u]NZ`t%AP  
      If ppx = p1x And ppy = p1y Then 8P7"&VYc8  
         point_in = True vu!d)Fy  
         Exit Function j"^ +oxH  
      End If 99$ 5`R;  
      If ppx = p2x And ppy = p2y Then eI.2`)>  
         point_in = True -9 !.m  
         Exit Function tWTKgbj(  
      End If FLg*R/  
       If ppx = p3x And ppy = p3y Then =deMd`=J  
         point_in = True 8.' #?]a  
         Exit Function ]5~s "fnG  
      End If ?Xdak|?i  
         BqDKT  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 9a\nszwa  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Xs&TJ8a  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y)  [,n c  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y)  ~ ~uAc_  
        sum = aob + boc + cod + doa >Vy>O &r  
        If 360.01 > sum And sum > 359.99 Then b2 _Yu^  
           point_in = True alh >"9~!  
        Else aQ^umrj@?9  
           point_in = False -9RDr\&`(  
        End If v_e9}yI   
    End Function
    离线safeng1122
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    只看该作者 5楼 发表于: 2013-04-08
    '得到点半径,得到交点坐标函数 t8^m`W  
    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() z <mK>$  
        '求得中心点坐标 6v,z@!b  
    Dim tt As String Rqwzh@}  
    Dim rt(3) As Single UAR5^  
        '判断是否平行 ^[%%r3"$C  
       acx = p3x - p1x eC5$#,HiC  
       acy = p3y - p1y 6wco&7   
       bdx = p4x - p2x zF5uN:-s  
       bdy = p4y - p2y $/6;9d^  
       If acx * bdy = acy * bdx Then QwhRNnE=  
          rt(0) = 0 l5l>d62  
          Exit Function w9 w%&{j  
       Else e><5Pr)  
          '判断斜率存在否 G=;k=oX(  
          If p1x = p3x And p2x <> p4x Then >~`C-K#  
             tt = "ac_n_bd_y" Kwc6mlw~M  
          ElseIf p1x <> p3x And p2x = p4x Then s2j['g5  
             tt = "ac_y_bd_n" .]aF 1}AI  
          ElseIf p1x <> p3x And p2x <> p4x Then x0 d~i!d  
             tt = "ac_y_bd_y" Bgmn2-  
          End If Ra*e5  
        Select Case tt }j,[ 1@S  
             Case "ac_n_bd_y" JCAq8=zM  
                'bd线段方程 JG{j)O|L  
                k_bd = bdy / bdx L 8{\r$  
                b_bd = p2y - k_bd * p2x eY{+~|KZ  
                p_x = p1x 7JSNYTH  
                p_y = k_bd * p_x + b_bd .9O$G2'oh  
             Case "ac_y_bd_n" EUsI%p  
                'ac线段方程 j~j\\Y  
                k_ac = acy / acx (E]!Z vE  
                b_ac = p1y - k_ac * p1x wP"dZagpj  
                p_x = p2x ~b {Gz6u>  
                p_y = k_ac * p_x + b_ac nx0K$ Ptq  
            Case "ac_y_bd_y" sg E-`#  
               'ac,bd线段都要求 Q f(p~a(d  
               k_ac = acy / acx |yo\R{&6  
               b_ac = p1y - k_ac * p1x +a^F\8H  
               k_bd = bdy / bdx 7)h[Zy,A  
               b_bd = p2y - k_bd * p2x p}[zt#v  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) pRSOYTebP  
               p_y = k_ac * p_x + b_ac !|c|o*t{  
            End Select Ts~L:3oaQ  
          rt(1) = p_x l }XU 59  
          rt(2) = p_y ja=F7Usb  
         xq"Jy=4Q*  
    '计算最大半径 xC C:BO`pw  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) |d6T/Uxo  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) |p$spQ  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 43V}# DA@  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) a#T]*(Yq)  
    Dim bb(5) As Single ,^icPQSwc  
      bb(1) = rr1 DNP13wp@  
      bb(2) = rr2 ? `J[[",  
      bb(3) = rr3 $['Bv  
      bb(4) = rr4 Z4IgBn(Z_}  
      nb = rr1 }^B6yWUN  
    For i = 1 To 4 LkQX?2>]  
        If nb <= bb(i) Then F:mq'<Q  
           nb = bb(i) 1#1 riM -  
        End If imiR/V>N  
    Next i ZoArQ(YFy  
        rt(0) = Sqr(nb) +VQ\mA59  
        rr = rt() i*CZV|t US  
      End If !Ra*)b "  
             ;NlWb =  
    End Function
    离线lifei0715
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    只看该作者 6楼 发表于: 2013-04-08
    高手啊.人才啊.
    离线safeng1122
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    只看该作者 7楼 发表于: 2013-04-09
    回 lifei0715 的帖子
    lifei0715:高手啊.人才啊. (2013-04-08 19:15)  QqU!Najf  
    mrw=T.  
    有热压工艺方面的人才或者资料分享下; $*?,#ta  
    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 KY~- ;0x  
    离线windcgp86
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    只看该作者 8楼 发表于: 2013-04-10
    高手真多!
    离线allansweruni
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    只看该作者 9楼 发表于: 2013-04-11
    楼主威武霸气.