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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: %]tW2s"  
    3!QXzT$E  
    $M4_"!  
    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: oq1wU@n  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) )fS6H<*  
    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 P#8lO%;  
    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 3!#FG0Z   
    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: {%, 4P_m  
    1.判断点在区域中函数 YX3NZW2i  
    2.计算夹角函数 ozHL'H  
    3.转置函数 %6M%PR~u  
    4.得到区域中心点,及区域半径函数 c@4$)68  
    5.再有就是若干个点抽取其中一部分;或者采用随机分布(该方法会有重合点,所以没采用) ^hT2 ed +  
    6.文件开启与关闭,这个最常见了,就不说了
    离线safeng1122
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    只看该作者 3楼 发表于: 2013-04-08
    '计算夹角函数 QNXS.!\P  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single o{mVXidE  
       cax = x2 - x1 X]GodqL\  
       cay = y2 - y1 X?`mYoe  
       cbx = x2 - x3 wp:Zur5Y  
       cby = y2 - y3 O\%0D.HEz  
       mo_jj = cax * cbx + cay * cby v`6vc)>8  
       mo_ca = Sqr(cax * cax + cay * cay) OsYZ a`$,  
       mo_cb = Sqr(cbx * cbx + cby * cby) @x *,fk  
       cos_acb = mo_jj / (mo_ca * mo_cb) &{q'$oF  
       'ff_cos = cos_acb yaHkWkl =  
       If cos_acb >= 1 Then '?X?'_3  
       nn = 0 Sm|TDH  
       ElseIf cos_acb <= -1 Then sdgI ,  
       nn = 3.14159265258979 4"^W/Zo  
       Else 7.kH="@  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ?1eu9;q\*  
       End If Dx9k%G)!  
       'ff_angle = nn L,,*8  
       ff_angle = nn * 180 / 3.14159265258979 5.kKg=a  
    End Function
    离线safeng1122
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    只看该作者 4楼 发表于: 2013-04-08
    '判断点在区域内函数 IZd~Am3f  
    Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean ,wyEo>>4)  
    Dim aob, boc, cod, doa, sum As Single \vW'\}  
      If ppx = p1x And ppy = p1y Then c/(Dg$DbX  
         point_in = True I}]UQ4XJ  
         Exit Function zYftgH_o  
      End If i+I1h=  
      If ppx = p2x And ppy = p2y Then :e}j$v F  
         point_in = True =#&+w[4?&.  
         Exit Function v~YGef;D  
      End If d%p{l)Hd  
       If ppx = p3x And ppy = p3y Then 9h6siK(F  
         point_in = True /-=h|A#Kh  
         Exit Function w`zS`+4  
      End If xBqZ: BQ  
         &nY#G HB  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) +.*=Fn22  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) fA), ^  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) &.Yu%=}  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) <DEu]-'>  
        sum = aob + boc + cod + doa LftGA7uGJ)  
        If 360.01 > sum And sum > 359.99 Then l o- 42)  
           point_in = True ;9vY5CxzC  
        Else vOtILL6  
           point_in = False N#X* 0i"  
        End If ]BmnE#n&  
    End Function
    离线safeng1122
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    只看该作者 5楼 发表于: 2013-04-08
    '得到点半径,得到交点坐标函数 mCQ:< #  
    Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() ^Qxv5HS2  
        '求得中心点坐标 r( zn1;zl  
    Dim tt As String Y&$puiH-j  
    Dim rt(3) As Single /9?yw!  
        '判断是否平行 (!9+QXb'  
       acx = p3x - p1x _k(&<1i  
       acy = p3y - p1y [4;G^{ bX  
       bdx = p4x - p2x I(Vg  
       bdy = p4y - p2y pLMaXX~4_  
       If acx * bdy = acy * bdx Then _93:_L  
          rt(0) = 0 7{NH;U t  
          Exit Function  jQ-2SA O  
       Else *\`<=,H6<  
          '判断斜率存在否 G"Hj$  
          If p1x = p3x And p2x <> p4x Then U~oGg$  
             tt = "ac_n_bd_y" JX#0<U|L  
          ElseIf p1x <> p3x And p2x = p4x Then \\`(x:\  
             tt = "ac_y_bd_n" r,P`$-  
          ElseIf p1x <> p3x And p2x <> p4x Then va0}?fy.O%  
             tt = "ac_y_bd_y" ? Q"1zcX  
          End If gE8>o:6)6:  
        Select Case tt | S'mF6Y  
             Case "ac_n_bd_y" f#gV>.P;h\  
                'bd线段方程 y'O<*~C(X  
                k_bd = bdy / bdx @\a~5CLN  
                b_bd = p2y - k_bd * p2x nt%p@e!,  
                p_x = p1x *dsI>4%m  
                p_y = k_bd * p_x + b_bd "h8fTB\7S\  
             Case "ac_y_bd_n" & +yo PF  
                'ac线段方程 |ZOdfr4uW  
                k_ac = acy / acx Au:R]7   
                b_ac = p1y - k_ac * p1x ^S!;snhn  
                p_x = p2x aF>&X-2  
                p_y = k_ac * p_x + b_ac F#.ph?W  
            Case "ac_y_bd_y" 8uA!Vrp3  
               'ac,bd线段都要求 T*'WS!z  
               k_ac = acy / acx g~76c.u-  
               b_ac = p1y - k_ac * p1x gq="&  
               k_bd = bdy / bdx g1Osd7\o  
               b_bd = p2y - k_bd * p2x $  k_6  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) 6-+ wfrN2  
               p_y = k_ac * p_x + b_ac y>^0q/=]?O  
            End Select rU 1Ri  
          rt(1) = p_x 1Afy$It/{  
          rt(2) = p_y eL{$=Um  
         aS~~*UHW  
    '计算最大半径 dAy\IfZX=  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) L<6nM ;d  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 8i)9ho<  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 1X9J[5|ll  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) QXgfjo  
    Dim bb(5) As Single t=fP^bJ  
      bb(1) = rr1 3jHg9M23[^  
      bb(2) = rr2 ]ZNFrpq  
      bb(3) = rr3 zMd><UQP{  
      bb(4) = rr4 OU!."r`9  
      nb = rr1 z";(0%  
    For i = 1 To 4 `g0^ W/ j  
        If nb <= bb(i) Then "F4 3q8P  
           nb = bb(i) A8Km8"  
        End If g1(5QWb  
    Next i >P//]nn  
        rt(0) = Sqr(nb) [6Sk>j  
        rr = rt() hFxT@I~  
      End If pWP1$;8   
             [8%q@6[  
    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)  1eEML"  
    " Up(Vj@  
    有热压工艺方面的人才或者资料分享下; R.F l5B  
    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 1i_%1Oip  
    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.