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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: b9%}< w  
    =1t#$JG  
    Ti`<,TA54  
     
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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: =MO2M~e!  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) cAC2Xq  
    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 awuUaE  
    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 J'^s5hxn+0  
    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: 3P Twpq1  
    1.判断点在区域中函数 T_Q/KhLU  
    2.计算夹角函数 f]"][!e!,  
    3.转置函数 Taxi79cH  
    4.得到区域中心点,及区域半径函数 #C|:]moe  
    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) 7|PpAvMF  
    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 |DfYH~@(  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 0*V RFd4  
       cax = x2 - x1 Cca( oV  
       cay = y2 - y1 T :CsYj1  
       cbx = x2 - x3 +xRja(d6  
       cby = y2 - y3 liFNJd`|o+  
       mo_jj = cax * cbx + cay * cby 2N)=fBF%-  
       mo_ca = Sqr(cax * cax + cay * cay) Zb-TCS+3l  
       mo_cb = Sqr(cbx * cbx + cby * cby) 4nkH0dJQ  
       cos_acb = mo_jj / (mo_ca * mo_cb) 7^Uv1ezDR  
       'ff_cos = cos_acb btw_k+Fh  
       If cos_acb >= 1 Then lE08UEk1i  
       nn = 0 VZYd CZ&l7  
       ElseIf cos_acb <= -1 Then #!h:w  
       nn = 3.14159265258979 ;3Fgy8 T  
       Else <;#d*&]  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) fMwJwMT8  
       End If EiI3$y3;  
       'ff_angle = nn s['F?GWg  
       ff_angle = nn * 180 / 3.14159265258979 En+4@BC  
    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 wED~^[]f  
    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 L|S#(0  
    Dim aob, boc, cod, doa, sum As Single {~16j"  
      If ppx = p1x And ppy = p1y Then _.J{U0N  
         point_in = True (Z)  
         Exit Function eL^,-3JA(]  
      End If .,l ?z  
      If ppx = p2x And ppy = p2y Then Y1{6lhxgE  
         point_in = True f|?i6.N> f  
         Exit Function zdyS"H}  
      End If xex/L%!Rj  
       If ppx = p3x And ppy = p3y Then ^O#,%>1J  
         point_in = True J\_tigd   
         Exit Function #E5#{bra  
      End If q ]rsp0P2  
         N-3w)23*:  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ]. 1[H~5N  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) KmEm  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) hc>hNC:a  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) p(Y'fd}  
        sum = aob + boc + cod + doa mY(~94{d  
        If 360.01 > sum And sum > 359.99 Then *`ji2+4Sjw  
           point_in = True [@#P3g\:>W  
        Else M=26@ n  
           point_in = False M^mS#<!y  
        End If R2x(8k"LPU  
    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 AmRppbj/wO  
    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() 1A< O Z>  
        '求得中心点坐标 \W( C=e  
    Dim tt As String >LFhu6T  
    Dim rt(3) As Single "%<Oadz ap  
        '判断是否平行 +MGEO+  
       acx = p3x - p1x -2K`:}\y&  
       acy = p3y - p1y 8D)*~C'85E  
       bdx = p4x - p2x KxGK`'E'r  
       bdy = p4y - p2y ,;O+2TX  
       If acx * bdy = acy * bdx Then Ts|&_|  
          rt(0) = 0 r?\hZ*|M  
          Exit Function fi:Z*-  
       Else opjrU$<]N  
          '判断斜率存在否 #";(&|7  
          If p1x = p3x And p2x <> p4x Then JdfjOlEb  
             tt = "ac_n_bd_y" v#(wc +[  
          ElseIf p1x <> p3x And p2x = p4x Then fHb0pp\[.  
             tt = "ac_y_bd_n" u(\b1h n  
          ElseIf p1x <> p3x And p2x <> p4x Then 1}QU\N(t  
             tt = "ac_y_bd_y" +<"sC+2  
          End If }a'8lwF%I  
        Select Case tt 8D;>]>  
             Case "ac_n_bd_y" x>!#8?-h  
                'bd线段方程 H^B/ '#mO  
                k_bd = bdy / bdx xQm!  
                b_bd = p2y - k_bd * p2x 6S2D\Bt,_  
                p_x = p1x g(,gg1mG  
                p_y = k_bd * p_x + b_bd |B;:Ald  
             Case "ac_y_bd_n" Qi w "x,  
                'ac线段方程 o D*h@yL  
                k_ac = acy / acx kRTT ~  
                b_ac = p1y - k_ac * p1x My5h;N@C  
                p_x = p2x (Y)$+9  
                p_y = k_ac * p_x + b_ac yg5Ik{  
            Case "ac_y_bd_y" s0E:hn:  
               'ac,bd线段都要求 wX<)Fj'  
               k_ac = acy / acx -SlLX\>p  
               b_ac = p1y - k_ac * p1x e#0R9+"Ba  
               k_bd = bdy / bdx rKg5?.  
               b_bd = p2y - k_bd * p2x Z<0M_q9?MO  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) bEMD2ABm  
               p_y = k_ac * p_x + b_ac =Mc*~[D/  
            End Select egYJ.ZzF0  
          rt(1) = p_x W-<C%9O!  
          rt(2) = p_y [_^K}\/+  
         /U`"Xx  
    '计算最大半径 SYw>P1  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) eXc`"T,C.  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) H .JA)*b-  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Zyu4!  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 38 tRb"3zP  
    Dim bb(5) As Single dArg'Dc4  
      bb(1) = rr1 T5=3 jPQ  
      bb(2) = rr2 ~N;kF.q&>&  
      bb(3) = rr3 [as\>@o  
      bb(4) = rr4 `&LPqb  
      nb = rr1 $GSn#} yz  
    For i = 1 To 4 P@`@?kMU  
        If nb <= bb(i) Then dli?/U@hO  
           nb = bb(i) .Lr;{B  
        End If p[!&D}&6h  
    Next i %|I~8>m  
        rt(0) = Sqr(nb) YiTiJ9jf  
        rr = rt() X"z^4?Aj+  
      End If A% -*M 'J  
             fk<0~ tE  
    End Function
    离线lifei0715
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    只看该作者 6楼 发表于: 2013-04-08
    高手啊.人才啊.
    离线safeng1122
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    只看该作者 7楼 发表于: 2013-04-09
    回 lifei0715 的帖子
    lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Oxsx\f_  
    0"}qND  
    有热压工艺方面的人才或者资料分享下; #0$fZ  
    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 *ThP->&:(  
    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.