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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: fcF|m5  
    R"O%##Ws  
    %pOz%v~  
     
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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: }[PwA[k'  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) 8w[O%  
    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 ETL7|C"  
    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 L{>rN`{  
    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: jmq^98jB  
    1.判断点在区域中函数 }15&<s  
    2.计算夹角函数 Y_y!$jd(N  
    3.转置函数 By7lSbj  
    4.得到区域中心点,及区域半径函数 (NR( )2  
    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) *.wj3' wV  
    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 ;5\'PrE  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Nes|4Z<  
       cax = x2 - x1 ynMYf  
       cay = y2 - y1 PuZzl%i P3  
       cbx = x2 - x3 JleClB(2n/  
       cby = y2 - y3 o?M;f\Fy  
       mo_jj = cax * cbx + cay * cby #X*);cn  
       mo_ca = Sqr(cax * cax + cay * cay) Gy["_;+xU  
       mo_cb = Sqr(cbx * cbx + cby * cby) ^2rj);{V  
       cos_acb = mo_jj / (mo_ca * mo_cb) 8irTGA  
       'ff_cos = cos_acb bg0ix"  
       If cos_acb >= 1 Then .tfal9  
       nn = 0 p(GI02|n  
       ElseIf cos_acb <= -1 Then X~o;jJC  
       nn = 3.14159265258979 b9?Vpu`?  
       Else 8kU(>' ^_:  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) =(TMcu$4`  
       End If s@%>  
       'ff_angle = nn `]GL3cIh:  
       ff_angle = nn * 180 / 3.14159265258979 7W4m&+  
    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 5'{QMnfB  
    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 $1s>efP-  
    Dim aob, boc, cod, doa, sum As Single ~n0Exw(  
      If ppx = p1x And ppy = p1y Then :si&A;k  
         point_in = True 8VG~n?y  
         Exit Function `]19}GK~xo  
      End If "#8^":,4  
      If ppx = p2x And ppy = p2y Then 8?<J,zu@AV  
         point_in = True ]1GyEr:  
         Exit Function 69ycP(  
      End If ^a3 (QKS  
       If ppx = p3x And ppy = p3y Then }NV<k  
         point_in = True Ax@7RJ||  
         Exit Function 4C:dkaDq]  
      End If /s(PFN8#Y  
         5?(dI9A"K  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) # E8?2]  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) U~7{q >  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) EX W?)_pg  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 6y`FW[  
        sum = aob + boc + cod + doa 6b` Jq>v  
        If 360.01 > sum And sum > 359.99 Then >U4bK^/Bp  
           point_in = True #sv}%oV,F  
        Else ?6N\AM '  
           point_in = False  =/ !A  
        End If j[$+DCO#|m  
    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 >: @\SU  
    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() !HXsxNe  
        '求得中心点坐标 mkBQ TQGT  
    Dim tt As String ~7\`qH  
    Dim rt(3) As Single lY |]  
        '判断是否平行 &s\,+d0  
       acx = p3x - p1x t[b(erO'  
       acy = p3y - p1y rX`fjS*C  
       bdx = p4x - p2x ^:O*Sx.CA  
       bdy = p4y - p2y J04R,B  
       If acx * bdy = acy * bdx Then geqx":gpx9  
          rt(0) = 0 $'a]lR  
          Exit Function `"iPJw14  
       Else dftX$TS  
          '判断斜率存在否 1o   
          If p1x = p3x And p2x <> p4x Then D2:ShyYAS  
             tt = "ac_n_bd_y" 0R&7vn  
          ElseIf p1x <> p3x And p2x = p4x Then OXoEA a  
             tt = "ac_y_bd_n" 4 T/ ~erc  
          ElseIf p1x <> p3x And p2x <> p4x Then *Hh*!ePp  
             tt = "ac_y_bd_y" aJ]t1  
          End If r9-)+R J  
        Select Case tt diw5h};W  
             Case "ac_n_bd_y" xkaed  
                'bd线段方程 .e S* F  
                k_bd = bdy / bdx ,fm{ krE  
                b_bd = p2y - k_bd * p2x `-rtU  
                p_x = p1x n 2(\pQKm  
                p_y = k_bd * p_x + b_bd k@9q5lu;T  
             Case "ac_y_bd_n" MY&?*pV)  
                'ac线段方程 LyNur8 Zi  
                k_ac = acy / acx `3UvKqe  
                b_ac = p1y - k_ac * p1x &v r0{]V^  
                p_x = p2x \5) ZI'q  
                p_y = k_ac * p_x + b_ac ia-&?  
            Case "ac_y_bd_y" 34vH+,!u  
               'ac,bd线段都要求 Oo%%f+  
               k_ac = acy / acx YE@!`!`d:  
               b_ac = p1y - k_ac * p1x @Z~0!VY  
               k_bd = bdy / bdx ^DR`!.ttr  
               b_bd = p2y - k_bd * p2x /Dk`?  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) QVR-`d/  
               p_y = k_ac * p_x + b_ac O<0-`=W,a  
            End Select Tr HUM4  
          rt(1) = p_x K5d>{c  
          rt(2) = p_y ^`(3X  
         ^F/H?V/PX  
    '计算最大半径 `+WQ^dP@  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Jz_`dLL^ w  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) m] IN-'  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) YW-Ge  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) YccD ^w[`B  
    Dim bb(5) As Single C5#$NV99p  
      bb(1) = rr1 }Ot2; T  
      bb(2) = rr2 \,b_8^  
      bb(3) = rr3 a^9}ceu?   
      bb(4) = rr4 RXbZaje$  
      nb = rr1 }9&~+Q2  
    For i = 1 To 4 _57 68G`P  
        If nb <= bb(i) Then X]%n#\t,]  
           nb = bb(i) 2` h  
        End If HBgt!D0MZ  
    Next i ^(yU)k3pu  
        rt(0) = Sqr(nb) sX=_|<[  
        rr = rt() S 5nri(m  
      End If y8O<_VOO}"  
             "V7&@3  
    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)  `Al( AT(p  
    .A`Q!  
    有热压工艺方面的人才或者资料分享下; %;|^*?!J0  
    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 jNa'l<dn]  
    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.