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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: V< vPFxC  
    }utNZhJ  
    `8(h,aj;  
     
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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: t @(9ga(  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) OwA~(  
    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 0TO_1 0D  
    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 ySQ-!fQnP  
    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: [0u.}c;(  
    1.判断点在区域中函数 f v E+.{  
    2.计算夹角函数 _ }E-~I>  
    3.转置函数 #zS1Z f^KP  
    4.得到区域中心点,及区域半径函数 S jVsF1d_  
    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) |rHG%VnBH  
    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 1, "I=  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single J~Cc9"(  
       cax = x2 - x1 rv9B}%e  
       cay = y2 - y1 *jk3 \KaoV  
       cbx = x2 - x3 ;n`R\NO9  
       cby = y2 - y3 lPM3}52Xu  
       mo_jj = cax * cbx + cay * cby I|,pE**T  
       mo_ca = Sqr(cax * cax + cay * cay) }p~OCW!  
       mo_cb = Sqr(cbx * cbx + cby * cby) ^WE4*.(  
       cos_acb = mo_jj / (mo_ca * mo_cb) 0QMTIAW6h  
       'ff_cos = cos_acb (I-<f$3  
       If cos_acb >= 1 Then Z_H?WGO  
       nn = 0 Q6"uK  
       ElseIf cos_acb <= -1 Then LHh5 v"zjG  
       nn = 3.14159265258979 {<qF}i:V  
       Else >i "qMZ  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ! z11" c  
       End If C5P$ &s\  
       'ff_angle = nn ^SZw`]  
       ff_angle = nn * 180 / 3.14159265258979 L0rip5[;d  
    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 -fE.<)m=!  
    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 JVtQ ,oZ  
    Dim aob, boc, cod, doa, sum As Single *5_V*v6  
      If ppx = p1x And ppy = p1y Then QK)){ cK  
         point_in = True pkJ/oT  
         Exit Function :0$a.8Y\++  
      End If v??TJ^1  
      If ppx = p2x And ppy = p2y Then u*3NS$vH  
         point_in = True =; 0wFwSz  
         Exit Function ohUdGO[/  
      End If hi ~}  
       If ppx = p3x And ppy = p3y Then _AFQ>j  
         point_in = True jMM$d,7B  
         Exit Function JK]R*!{n  
      End If MtS3p>4  
         ~ 3^='o  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) T*?s@$)m4  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) kH'p\9=  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) .N,&Uv-  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) tF*szf|$-  
        sum = aob + boc + cod + doa 7p.>\YtoR}  
        If 360.01 > sum And sum > 359.99 Then %Y]=1BRk}  
           point_in = True xl(@C*.sC1  
        Else =pcF:D#+  
           point_in = False G O{ . 9_2  
        End If :4:N f  
    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 &gtG~mp<L  
    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() k1^\|   
        '求得中心点坐标 +-<}+8G;  
    Dim tt As String b&#DnZcf  
    Dim rt(3) As Single \(~wZd  
        '判断是否平行 mj&57D\fq  
       acx = p3x - p1x Bj Wr5SJ  
       acy = p3y - p1y ?m7:if+ y  
       bdx = p4x - p2x p8}(kHUp(  
       bdy = p4y - p2y zce`\ /:  
       If acx * bdy = acy * bdx Then JTU#vq:TY  
          rt(0) = 0 *T`-|H*6@  
          Exit Function S?ujRp  
       Else %zBCq"y  
          '判断斜率存在否 &Lm-()wb  
          If p1x = p3x And p2x <> p4x Then d>0 +A)6>  
             tt = "ac_n_bd_y" ~g#r6pzN-  
          ElseIf p1x <> p3x And p2x = p4x Then HOoPrB m  
             tt = "ac_y_bd_n" ^/U27B  
          ElseIf p1x <> p3x And p2x <> p4x Then Vw tZLP36  
             tt = "ac_y_bd_y" Bc7V)Y K  
          End If dY7'OAUyVl  
        Select Case tt m8R9{LC  
             Case "ac_n_bd_y" R=Zn -q  
                'bd线段方程 r H8@69,B  
                k_bd = bdy / bdx  6e,xDr  
                b_bd = p2y - k_bd * p2x Rk6deI]  
                p_x = p1x ,Lpixnm]  
                p_y = k_bd * p_x + b_bd *\}}Bv+9  
             Case "ac_y_bd_n" |re}6#TgcT  
                'ac线段方程 \1"'E@+  
                k_ac = acy / acx O.`Jl%  
                b_ac = p1y - k_ac * p1x L< ^j"!0  
                p_x = p2x ^y!;xc$(Qs  
                p_y = k_ac * p_x + b_ac V7d) S&*V  
            Case "ac_y_bd_y" fq )vK  
               'ac,bd线段都要求 h4|i%,f  
               k_ac = acy / acx dCyqvg6u  
               b_ac = p1y - k_ac * p1x #LlUxHv #  
               k_bd = bdy / bdx M`YWn ;  
               b_bd = p2y - k_bd * p2x bmgncwlz  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) s m,VYYs  
               p_y = k_ac * p_x + b_ac ]\-^>!F#K  
            End Select S$TmZk=  
          rt(1) = p_x G!w"{Bk?9  
          rt(2) = p_y in+}/mwfC  
         {7u[1[L1  
    '计算最大半径 +gd4\ZG  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) sUZX }  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) @ "a6fn  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) GSclK|#t E  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 5=Xy,hmnC  
    Dim bb(5) As Single 7SDFz}  
      bb(1) = rr1 :y*NM,s  
      bb(2) = rr2 K<?nq0-  
      bb(3) = rr3 [(X y.L7x  
      bb(4) = rr4 &Z(K6U#.  
      nb = rr1 qm/Q65>E  
    For i = 1 To 4 ZkL8e  
        If nb <= bb(i) Then :B3[:MpL}  
           nb = bb(i) ,.eWQK~  
        End If <,o>Wx*1C  
    Next i 7C#`6:tI  
        rt(0) = Sqr(nb) ]Chj T}  
        rr = rt() :w}{$v}#D;  
      End If \(226^|j  
             L,y6^J!  
    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)  @)SL_9  
    =4h+ M$2  
    有热压工艺方面的人才或者资料分享下; Bn>8&w/P  
    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 &+G"k~%  
    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.