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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: =]"|x7'!  
    ^iS:mt  
    c@M@t0WT[  
    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: |/s2AzDD  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) RGI6W{\  
    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 F*:NKT d  
    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 QC,(rB  
    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: l{m~d!w`a  
    1.判断点在区域中函数 0.+eF }'H  
    2.计算夹角函数 8lSn*;S,  
    3.转置函数 ]GKx[F{)  
    4.得到区域中心点,及区域半径函数 q%Jy>IXt  
    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) 4,ynt&  
    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 m{dyVE  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Cf=q_\0|W  
       cax = x2 - x1 "`*a)'.'^c  
       cay = y2 - y1 m&0BbyE.z  
       cbx = x2 - x3 A-C)w/7  
       cby = y2 - y3 Q1\k`J  
       mo_jj = cax * cbx + cay * cby x$ J.SbW  
       mo_ca = Sqr(cax * cax + cay * cay) L(2P|{C  
       mo_cb = Sqr(cbx * cbx + cby * cby) #IGoz|m  
       cos_acb = mo_jj / (mo_ca * mo_cb) T_tDpq_|  
       'ff_cos = cos_acb X+E\]X2  
       If cos_acb >= 1 Then Bd~cY/M  
       nn = 0 C2=iZ`Z>T  
       ElseIf cos_acb <= -1 Then /,N!g_"Z  
       nn = 3.14159265258979 p6y0W`U  
       Else mQ60@_"Y=,  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ^!p<zZ  
       End If v&b.Q:h*'  
       'ff_angle = nn }-q`&1!t  
       ff_angle = nn * 180 / 3.14159265258979 $< K)fbG  
    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 Cs[7% j  
    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 U|Z>SE<k  
    Dim aob, boc, cod, doa, sum As Single Ce5w0&VlS  
      If ppx = p1x And ppy = p1y Then /q"d`!h)w  
         point_in = True ,D@ ;i  
         Exit Function V)1:LLRW  
      End If Q f+p0E;  
      If ppx = p2x And ppy = p2y Then $v'Y:  
         point_in = True s\Pt,I@Y_  
         Exit Function <{NYD .  
      End If h/ X5w4  
       If ppx = p3x And ppy = p3y Then Q%n{*py  
         point_in = True Vy% :\p+  
         Exit Function v :+8U[x  
      End If "0H56#eW  
         b%[ nB  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) fZ6 fV=HEF  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 7edPH3  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) &8Jg9#  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) /K,|k EE'n  
        sum = aob + boc + cod + doa 5rfH;`  
        If 360.01 > sum And sum > 359.99 Then ne"?90~  
           point_in = True zD)IU_GWa  
        Else ckf<N9  
           point_in = False KZrMf77=  
        End If $W/+nmb)@K  
    End Function
    离线safeng1122
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    只看该作者 5楼 发表于: 2013-04-08
    '得到点半径,得到交点坐标函数 Y^f94s:2S  
    Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() M[YTk=IM#  
        '求得中心点坐标 JO2ZS6k[  
    Dim tt As String =f4[=C$&`  
    Dim rt(3) As Single ':4}O#  
        '判断是否平行 r=~WMDCz@  
       acx = p3x - p1x la\zaKC;>  
       acy = p3y - p1y %@lV-(5q  
       bdx = p4x - p2x Nm6Z|0S  
       bdy = p4y - p2y ;-KA UgL2  
       If acx * bdy = acy * bdx Then Ml8 YyF/~  
          rt(0) = 0 yn/?= ?0  
          Exit Function GOy=p3mQ  
       Else j3x^<a\gJ  
          '判断斜率存在否 (C`FicY  
          If p1x = p3x And p2x <> p4x Then pg~zUOY  
             tt = "ac_n_bd_y" }+9 1s'/c  
          ElseIf p1x <> p3x And p2x = p4x Then AT B\^;n.  
             tt = "ac_y_bd_n" Q_&}^  
          ElseIf p1x <> p3x And p2x <> p4x Then w]>"'o{{  
             tt = "ac_y_bd_y" Gn bfy4Z  
          End If ]d@^i)2LF  
        Select Case tt 0'?V|V=v  
             Case "ac_n_bd_y" ixIV=#  
                'bd线段方程 _tWJXv~;  
                k_bd = bdy / bdx .FIt.XPzv  
                b_bd = p2y - k_bd * p2x :+~KPn>w5  
                p_x = p1x :/C ?FHs9  
                p_y = k_bd * p_x + b_bd vk  @%R  
             Case "ac_y_bd_n" D JLiZS  
                'ac线段方程  L5"8G,I  
                k_ac = acy / acx yicO!:bM  
                b_ac = p1y - k_ac * p1x )W&o?VRfO  
                p_x = p2x L([E98fo  
                p_y = k_ac * p_x + b_ac r<;l{7lY_  
            Case "ac_y_bd_y" 4$yV%[j  
               'ac,bd线段都要求 ]g{hhP3>  
               k_ac = acy / acx W8w3~  
               b_ac = p1y - k_ac * p1x m7$8k@r  
               k_bd = bdy / bdx Q)09]hP[Xj  
               b_bd = p2y - k_bd * p2x G 9DJa_]X  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) 3/X-Cr+d  
               p_y = k_ac * p_x + b_ac *)limqe3"$  
            End Select 1 6"#i  
          rt(1) = p_x TT'Ofvdc  
          rt(2) = p_y N>+P WE$  
         Lltc 4Mzw  
    '计算最大半径 &^ V~cJ  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y)  t?gJNOV  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) YiD-F7hf.*  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) _p\629`  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) z0#-)AeS  
    Dim bb(5) As Single -x{dc7y2  
      bb(1) = rr1 0y)}.'  
      bb(2) = rr2 'eD J@4Xm  
      bb(3) = rr3 UQ/qBbn  
      bb(4) = rr4 rkkU"l$v  
      nb = rr1 94\t1fE  
    For i = 1 To 4 &~RR&MdZ2  
        If nb <= bb(i) Then BR+nL6sU  
           nb = bb(i) z9[[C^C  
        End If U4Z[!s$  
    Next i pD"YNlB^  
        rt(0) = Sqr(nb) X*i/A<Y`=  
        rr = rt() W+_RhJ  
      End If WzjL-a(  
             >*IN  
    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)  x0Yse:RE^  
    |.P/:e9  
    有热压工艺方面的人才或者资料分享下; w~Ff%p@9  
    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 "w_N' -}#  
    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.