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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: CzCQFqXI  
    YW@#91.  
    ?E%ELs_Dl  
    本主题包含附件,请 登录 后查看, 或者 注册 成为会员
     
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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: `LAR@a5i  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) R" )bDy?  
    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 zA+~7;7E  
    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 CC\*?BKj"  
    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: #ET/ =  
    1.判断点在区域中函数 uZfnzd)c  
    2.计算夹角函数 {-|{xBd  
    3.转置函数 >#Q\DsDS  
    4.得到区域中心点,及区域半径函数 %sHF-n5P  
    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) U9D!GKVp  
    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 #Z6'?p9  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single s"Pf+aTW  
       cax = x2 - x1 "4vy lHIo  
       cay = y2 - y1 s w39\urf  
       cbx = x2 - x3 ^Y-]*8;]  
       cby = y2 - y3 tmqY2.   
       mo_jj = cax * cbx + cay * cby p-1 3H0Kt  
       mo_ca = Sqr(cax * cax + cay * cay) asY[8r?U  
       mo_cb = Sqr(cbx * cbx + cby * cby) cZ)}LX  
       cos_acb = mo_jj / (mo_ca * mo_cb) DjSbyXvrg  
       'ff_cos = cos_acb P!"&%d  
       If cos_acb >= 1 Then OKF tl  
       nn = 0 J'N!Omz  
       ElseIf cos_acb <= -1 Then [D*UT#FM  
       nn = 3.14159265258979 /-bO!RTwf  
       Else r}uz7}z %"  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ,V*%V;  
       End If ^ bEc6`eE  
       'ff_angle = nn -V:"l  
       ff_angle = nn * 180 / 3.14159265258979 1"pw  
    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 Nbp!teH6  
    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 Zh_|m#)  
    Dim aob, boc, cod, doa, sum As Single R'S0 zp6  
      If ppx = p1x And ppy = p1y Then 271&i  
         point_in = True -!c"k}N=  
         Exit Function i+gQE!  
      End If J/}:x;Y  
      If ppx = p2x And ppy = p2y Then r2k2%nI-J  
         point_in = True K~22\G`  
         Exit Function d> {nQF;c  
      End If byv[yGa`  
       If ppx = p3x And ppy = p3y Then Q'%PNrN  
         point_in = True C`5  
         Exit Function U#3J0+!  
      End If G#MdfKH  
         =b/L?dR.-  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) }[M`uZ  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 8=]Tr3   
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) B, 9w0  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ATR!7i\|  
        sum = aob + boc + cod + doa ij?  
        If 360.01 > sum And sum > 359.99 Then /PLn+-  
           point_in = True F$[ U|%*  
        Else qG<$Ajiin  
           point_in = False  |jM4E$  
        End If XP@1~$  
    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 G#?Sfn O0  
    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() CP6LHkM9  
        '求得中心点坐标 DZ_lW  
    Dim tt As String V =-WYu  
    Dim rt(3) As Single f aLtdQi  
        '判断是否平行 r fq;%C  
       acx = p3x - p1x 2z|*xS'G  
       acy = p3y - p1y ?.YOI.U^  
       bdx = p4x - p2x v{A KEX*  
       bdy = p4y - p2y H=\3Jj(4  
       If acx * bdy = acy * bdx Then /RMPS. d {  
          rt(0) = 0 eQ&ZX3*}  
          Exit Function I6Ce_|n ?k  
       Else 5Lf{8UxI  
          '判断斜率存在否 7P9=)$(EH  
          If p1x = p3x And p2x <> p4x Then AGbhJ=tB  
             tt = "ac_n_bd_y" 4fKC6UR  
          ElseIf p1x <> p3x And p2x = p4x Then "70WUx(\t  
             tt = "ac_y_bd_n" Jm42b4  
          ElseIf p1x <> p3x And p2x <> p4x Then 65Cg]Dt71  
             tt = "ac_y_bd_y" $ >EYhLBa  
          End If X@f "-\  
        Select Case tt x l#LrvxI  
             Case "ac_n_bd_y" D#o}cC.  
                'bd线段方程 ~I} &V T  
                k_bd = bdy / bdx DS)RX.k_#  
                b_bd = p2y - k_bd * p2x o0pII )v  
                p_x = p1x [B|MlrZ  
                p_y = k_bd * p_x + b_bd EbdfV-E  
             Case "ac_y_bd_n" *Q,0W:~-  
                'ac线段方程 o9H^?Rut  
                k_ac = acy / acx pbU!dOU~e  
                b_ac = p1y - k_ac * p1x =X.9,$Y  
                p_x = p2x _~T!9  
                p_y = k_ac * p_x + b_ac >>5NX"{  
            Case "ac_y_bd_y" kbMYMx.[  
               'ac,bd线段都要求 ;]pJj6J&v  
               k_ac = acy / acx dX)GPC-D7  
               b_ac = p1y - k_ac * p1x /;utcc  
               k_bd = bdy / bdx D &/L:  
               b_bd = p2y - k_bd * p2x di>cMS 4 c  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) Ck!VV2U#  
               p_y = k_ac * p_x + b_ac 8A+SjJ4$  
            End Select T16{_  
          rt(1) = p_x 4Z/Q=Mq2  
          rt(2) = p_y `YI f_a{  
         g2T -TG'd  
    '计算最大半径 %y%j*B!%  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) YE9,KVV;$n  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) oD$J0{K6  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) rhb@FE)Mc  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 4'LB7}WG  
    Dim bb(5) As Single )-`;1ca)s  
      bb(1) = rr1 HdPoO;  
      bb(2) = rr2 N+y&,N,  
      bb(3) = rr3 m2v'WY5u  
      bb(4) = rr4 `IY/9'vT  
      nb = rr1 L_K=g_]  
    For i = 1 To 4 ~R@Nd~L  
        If nb <= bb(i) Then [NTtz <i@  
           nb = bb(i) g=$1cC+(  
        End If p f_mf.  
    Next i r!{LLc}>  
        rt(0) = Sqr(nb) ?|ZTaX6A  
        rr = rt() as>L[jyG/  
      End If :G<E^<M\)^  
             `8Lo{P  
    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)  }E7:ihy  
     3S&U!  
    有热压工艺方面的人才或者资料分享下; "{D|@Bc  
    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 2m~V{mUT!  
    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.