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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: `U(FdT  
    D_g+O"];P  
    d;K,2  
     
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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: $/K<hT_  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) `Ps&N^[  
    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 }get e'I  
    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 ^8OK.iC  
    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: JV ydTvc  
    1.判断点在区域中函数 @ Z.BYC  
    2.计算夹角函数 >jz9o9?8  
    3.转置函数 2)hfYLi  
    4.得到区域中心点,及区域半径函数 ]n}aePl}oU  
    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) 7cB/G:{  
    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 k4a51[SYBK  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single `Fie'[F5,)  
       cax = x2 - x1 vJxE F&X  
       cay = y2 - y1 l^Ob60)2  
       cbx = x2 - x3 hr;^.a^  
       cby = y2 - y3 Z#.1p'3qm1  
       mo_jj = cax * cbx + cay * cby L&c & <+0T  
       mo_ca = Sqr(cax * cax + cay * cay)  QEg[  
       mo_cb = Sqr(cbx * cbx + cby * cby) 3m= _a  
       cos_acb = mo_jj / (mo_ca * mo_cb) $33E-^  
       'ff_cos = cos_acb 10fxK  
       If cos_acb >= 1 Then jYi,oE  
       nn = 0 D%~tU70a  
       ElseIf cos_acb <= -1 Then 1~ W@[D  
       nn = 3.14159265258979 G&xtL  
       Else ?h6|N%U'  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) M^[;{p2uZ  
       End If ;Ax-f04gG  
       'ff_angle = nn w+/`l*  
       ff_angle = nn * 180 / 3.14159265258979 ;+<IWDo  
    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 =SXdO)%2  
    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 G9f6'5 O  
    Dim aob, boc, cod, doa, sum As Single HEBeJ2w  
      If ppx = p1x And ppy = p1y Then ?qNU*d  
         point_in = True >\d&LLAe  
         Exit Function tw_o?9  
      End If !?nbB2,  
      If ppx = p2x And ppy = p2y Then bZ\R0[0  
         point_in = True k ucbI_  
         Exit Function J?9jD:x  
      End If ,WRm{ v0f^  
       If ppx = p3x And ppy = p3y Then 5EFt0?G   
         point_in = True t>[W]%op  
         Exit Function wM+1/[7  
      End If GGp.u@\r  
         }|.<EkA  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) G:<f(Gy  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) XOvJlaY)'.  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 6kYluV+j  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) g'7E6n"!,  
        sum = aob + boc + cod + doa zMsup4cl  
        If 360.01 > sum And sum > 359.99 Then G-d7}Uz ?  
           point_in = True x4WCAqi/2  
        Else \N9=13W<lK  
           point_in = False {DRk{>K,  
        End If .d<K`.O ;  
    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 i!a!qE.1  
    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() t\M6 d6  
        '求得中心点坐标 p:~#(/GWf  
    Dim tt As String >V"{]v  
    Dim rt(3) As Single Gdow[x  
        '判断是否平行 2j-l<!s  
       acx = p3x - p1x Y/sav;  
       acy = p3y - p1y \@@G\\)er  
       bdx = p4x - p2x G<CD 4:V  
       bdy = p4y - p2y *$A`+D9  
       If acx * bdy = acy * bdx Then V D#q\  
          rt(0) = 0 TCp9C1Q4  
          Exit Function %e:+@%]  
       Else JG;}UuHYM  
          '判断斜率存在否 %Xc,l Y1?  
          If p1x = p3x And p2x <> p4x Then #w;"s*  
             tt = "ac_n_bd_y" z};|.N}  
          ElseIf p1x <> p3x And p2x = p4x Then q]4h#?.-1v  
             tt = "ac_y_bd_n" /` M#  
          ElseIf p1x <> p3x And p2x <> p4x Then S<T 'B0r8  
             tt = "ac_y_bd_y" Zq 4%O7%  
          End If N:B<5l '  
        Select Case tt .s\lfBo9  
             Case "ac_n_bd_y" G&h@  
                'bd线段方程 ? l~qb]._  
                k_bd = bdy / bdx eBa#Z1Z  
                b_bd = p2y - k_bd * p2x jG ouwta  
                p_x = p1x b}(c'W*z%  
                p_y = k_bd * p_x + b_bd mX>N1zAz  
             Case "ac_y_bd_n"  L]l/w  
                'ac线段方程 ViW2q"4=  
                k_ac = acy / acx 2|"D\N  
                b_ac = p1y - k_ac * p1x >K'dgJ245  
                p_x = p2x '9QEG/v  
                p_y = k_ac * p_x + b_ac TFOx=_.%i  
            Case "ac_y_bd_y" r], %:imGr  
               'ac,bd线段都要求 a( ~X  
               k_ac = acy / acx E q4tcZ  
               b_ac = p1y - k_ac * p1x JFI*Pt;X9  
               k_bd = bdy / bdx 2c]751  
               b_bd = p2y - k_bd * p2x ?<F([(  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) .(/HUQn  
               p_y = k_ac * p_x + b_ac r?u4[ Oe#  
            End Select tQG'f*4  
          rt(1) = p_x Zrwd  
          rt(2) = p_y y_>DszRN`u  
         &bq1n_  
    '计算最大半径 Y'000#+  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) q{V e%8$"  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 8g:VfzaHu  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 8+Tv@  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) XzIC~}  
    Dim bb(5) As Single ie[X7$@  
      bb(1) = rr1 2u-J+  
      bb(2) = rr2 CH(Y.Kj-  
      bb(3) = rr3 MB:[: nX  
      bb(4) = rr4 [(a3ljbRX  
      nb = rr1 <B T18u\  
    For i = 1 To 4 3=U#v<  
        If nb <= bb(i) Then IAzFwlO9  
           nb = bb(i) gFuK/]gzI  
        End If |Isn<|_  
    Next i mW{uChHP  
        rt(0) = Sqr(nb) #-Mr3  
        rr = rt() q{}5wM  
      End If Z&?4<-@6\p  
             &HLG<ISw  
    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)  WhH60/`  
    BHgs,  
    有热压工艺方面的人才或者资料分享下; a9^})By&  
    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 *wmkcifF;  
    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.