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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:  qLP/z  
    {]Hv*{ ]  
    \"Y,1in#  
     
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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: IA({RE  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) j7k}!j_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 (6Z^0GL  
    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 x|(pmqIH+  
    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: mV$ebFco0  
    1.判断点在区域中函数 ABX%oZ7[|o  
    2.计算夹角函数 Bhd)# P  
    3.转置函数 q`b6if"  
    4.得到区域中心点,及区域半径函数 >m,hna]RZ  
    5.再有就是若干个点抽取其中一部分;或者采用随机分布(该方法会有重合点,所以没采用) AXW.`~ 4  
    6.文件开启与关闭,这个最常见了,就不说了
    离线safeng1122
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    只看该作者 3楼 发表于: 2013-04-08
    '计算夹角函数 )hXTgUZa  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single *;Mi/^pzK  
       cax = x2 - x1 =GPXuo  
       cay = y2 - y1 Og/aTR<;=  
       cbx = x2 - x3 'z(Y9%+a  
       cby = y2 - y3 &aLTy&8Fv  
       mo_jj = cax * cbx + cay * cby O -1O@:}c  
       mo_ca = Sqr(cax * cax + cay * cay) A iM ukd,  
       mo_cb = Sqr(cbx * cbx + cby * cby) e~N&?^M  
       cos_acb = mo_jj / (mo_ca * mo_cb) :ZV |8xI  
       'ff_cos = cos_acb "w'pIUQ3,  
       If cos_acb >= 1 Then o$sD9xx  
       nn = 0 [-])$~WfW  
       ElseIf cos_acb <= -1 Then A'DFY {  
       nn = 3.14159265258979 %8FfP5#  
       Else i[!|0U`p  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) g Ed A hfx  
       End If ?,>3uD#  
       'ff_angle = nn zjQ746<&)i  
       ff_angle = nn * 180 / 3.14159265258979 @M5+12FYt  
    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 NP T-d  
    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 h0tiWHw  
    Dim aob, boc, cod, doa, sum As Single ~~W.]>f  
      If ppx = p1x And ppy = p1y Then Vp/XVyL}R  
         point_in = True 6]brL.eGj  
         Exit Function :?6HG_9X  
      End If .xJ54Vz  
      If ppx = p2x And ppy = p2y Then SGWb*grt  
         point_in = True lYG`)#T  
         Exit Function ^wIB;!W  
      End If Nw*<e ]uD  
       If ppx = p3x And ppy = p3y Then 3W?7hh  
         point_in = True $hhXsu=  
         Exit Function F1#{(uW  
      End If \sNgs#{7E7  
         * ,a F-  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) t*IePz]/  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ):$KM{X  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) rl|'.~mc  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) >v+1 v  
        sum = aob + boc + cod + doa U@OdQAX  
        If 360.01 > sum And sum > 359.99 Then "iSY;y o  
           point_in = True Nny*C`uDF  
        Else tbS hSbj  
           point_in = False ${Un#]g  
        End If @_ %RQO_X  
    End Function
    离线safeng1122
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    只看该作者 5楼 发表于: 2013-04-08
    '得到点半径,得到交点坐标函数 OJ&'Z}LB  
    Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() +#Pb@^6"m  
        '求得中心点坐标 cY5&1Shb~  
    Dim tt As String p1UloG\  
    Dim rt(3) As Single &>jz[3  
        '判断是否平行 )E9!m  
       acx = p3x - p1x Lz 1.+:Ag  
       acy = p3y - p1y +=($mcw#[  
       bdx = p4x - p2x oMbd1uus  
       bdy = p4y - p2y * :L"#20:R  
       If acx * bdy = acy * bdx Then BN9e S   
          rt(0) = 0 T?1BcY  
          Exit Function ~0PzRS^o  
       Else v'hc-Q9+>  
          '判断斜率存在否 K#OL/2^ 5  
          If p1x = p3x And p2x <> p4x Then KrGl}|  
             tt = "ac_n_bd_y" |m's)  
          ElseIf p1x <> p3x And p2x = p4x Then 5;)^o3X>  
             tt = "ac_y_bd_n" 'yiv.<4  
          ElseIf p1x <> p3x And p2x <> p4x Then @aS)=|Ls\  
             tt = "ac_y_bd_y" JBpV'_"]  
          End If edL2ax  
        Select Case tt w9|x{B  
             Case "ac_n_bd_y" Biv)s@"f-Q  
                'bd线段方程 [c B^6v  
                k_bd = bdy / bdx sQgz}0_= )  
                b_bd = p2y - k_bd * p2x _# {*I(l  
                p_x = p1x ?'k_K:_  
                p_y = k_bd * p_x + b_bd g  *,O  
             Case "ac_y_bd_n" HT.,BF  
                'ac线段方程 V lx.C~WYn  
                k_ac = acy / acx d|R-K7 ~~  
                b_ac = p1y - k_ac * p1x cSPQ NYU:  
                p_x = p2x T~3{$  
                p_y = k_ac * p_x + b_ac yr%[IX]R  
            Case "ac_y_bd_y"  /b=C  
               'ac,bd线段都要求 UwUHB~<oE  
               k_ac = acy / acx F~Dof({:  
               b_ac = p1y - k_ac * p1x wNmpUO ?  
               k_bd = bdy / bdx ?s2-iuMPd  
               b_bd = p2y - k_bd * p2x ~v8X>XDL?T  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) `NtW+v  
               p_y = k_ac * p_x + b_ac c0o]O[  
            End Select GFFwk4n1  
          rt(1) = p_x }#s{."  
          rt(2) = p_y 6w<rSUd'  
         xb\EJ1M>  
    '计算最大半径 [63\2{_^v  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) EV( F!&  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 336ETrG^0  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) =][ )|n  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) KJ+6Y9b1  
    Dim bb(5) As Single  T7nI/y  
      bb(1) = rr1 [!)HWgx  
      bb(2) = rr2 L-(bw3Yr>  
      bb(3) = rr3 X$@`4  
      bb(4) = rr4 yy3x]%KK  
      nb = rr1 3@" :&  
    For i = 1 To 4 O+W<l:|$  
        If nb <= bb(i) Then P^OmJ;""D  
           nb = bb(i) Pm%xX~H  
        End If Fv]6 a n.  
    Next i +6uf6&.@~  
        rt(0) = Sqr(nb) ]$ d ;P  
        rr = rt() 'xta/@Sq  
      End If 9\EW~OgTu  
             VzXVy)d  
    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)  <lR:^M[v5<  
    Tv1oy%dK  
    有热压工艺方面的人才或者资料分享下; <.Zh{"$qo  
    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 7 q!==P=  
    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.