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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: 9#O"^.Z !  
    @zsr.d6Q  
    c6BaC@2  
     
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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: +]5JXt^  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) h=d&@k\g  
    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 (Pvch!  
    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 xCoQ>.4p  
    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: Q'$aFl'NR  
    1.判断点在区域中函数 q;>'jHh  
    2.计算夹角函数 z'fGHiX7.0  
    3.转置函数 W9a H]9b  
    4.得到区域中心点,及区域半径函数 _W]3_1Lu  
    5.再有就是若干个点抽取其中一部分;或者采用随机分布(该方法会有重合点,所以没采用) 3<'SnP3mY  
    6.文件开启与关闭,这个最常见了,就不说了
    离线safeng1122
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    只看该作者 3楼 发表于: 2013-04-08
    '计算夹角函数 gt}/C4|  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single rpDH>Hzq  
       cax = x2 - x1 mP3:Fc _G  
       cay = y2 - y1 u) fbR  
       cbx = x2 - x3 w;>]L.n  
       cby = y2 - y3 YBHmd  
       mo_jj = cax * cbx + cay * cby ?A,gDk/#  
       mo_ca = Sqr(cax * cax + cay * cay) y5+-_x,  
       mo_cb = Sqr(cbx * cbx + cby * cby) 7&m*: J  
       cos_acb = mo_jj / (mo_ca * mo_cb) |l7e*$j  
       'ff_cos = cos_acb SGjaH 8z  
       If cos_acb >= 1 Then $~zqt%}  
       nn = 0 ed>_=i  
       ElseIf cos_acb <= -1 Then %"+FN2nbm  
       nn = 3.14159265258979 s)xfTr_$  
       Else 63-`3R?;  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) {7B$%G'  
       End If 4.CLTy3W  
       'ff_angle = nn 3lA<{m;V  
       ff_angle = nn * 180 / 3.14159265258979 tEBf2|<  
    End Function
    离线safeng1122
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    只看该作者 4楼 发表于: 2013-04-08
    '判断点在区域内函数 7d'4"c;*;  
    Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean w#XE!8`  
    Dim aob, boc, cod, doa, sum As Single 9I30ULm  
      If ppx = p1x And ppy = p1y Then 8>Ervi`  
         point_in = True LNk 3=v2M  
         Exit Function fs>0{  
      End If 0#sk]Qz  
      If ppx = p2x And ppy = p2y Then cnCUvD]'  
         point_in = True HmRwh  
         Exit Function ] p'+F  
      End If w&:h^u  
       If ppx = p3x And ppy = p3y Then iT9cw`A^%  
         point_in = True z9;vE7n!  
         Exit Function p B?a5jpA  
      End If k= nfo-h  
         >D<nfG<s Z  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Odw SNG  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) /i DS#l\0  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) >i@gR  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) `d3S0N6@  
        sum = aob + boc + cod + doa v`x~O+  
        If 360.01 > sum And sum > 359.99 Then ][wS}~):  
           point_in = True 6sB!m|zm]:  
        Else l]3g6c  
           point_in = False G9Azd^3  
        End If a,&Kvh  
    End Function
    离线safeng1122
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    只看该作者 5楼 发表于: 2013-04-08
    '得到点半径,得到交点坐标函数 CAc nH  
    Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() V~e1CZ(2X  
        '求得中心点坐标 ']+H P9i$  
    Dim tt As String ?:n{GK  
    Dim rt(3) As Single K=`*cSU>  
        '判断是否平行 Qyd3e O_  
       acx = p3x - p1x l*%voKZG  
       acy = p3y - p1y \4zvknk<  
       bdx = p4x - p2x =7Tbu'O;  
       bdy = p4y - p2y '[\%P2c)Q  
       If acx * bdy = acy * bdx Then L)B?p!cdLT  
          rt(0) = 0 X<-]./  
          Exit Function )2rI/=R  
       Else z{!wQ~ j  
          '判断斜率存在否 F<IqKgGzH  
          If p1x = p3x And p2x <> p4x Then vkbB~gr@*  
             tt = "ac_n_bd_y" .=^h@C*   
          ElseIf p1x <> p3x And p2x = p4x Then 1Rp|*>  
             tt = "ac_y_bd_n" mjs*Z{_F^  
          ElseIf p1x <> p3x And p2x <> p4x Then `4;<\VYCr  
             tt = "ac_y_bd_y" bIWcL$}4Q  
          End If #/1A:ig  
        Select Case tt to:hMd1T  
             Case "ac_n_bd_y" $I1p"6  
                'bd线段方程 kAy.o  
                k_bd = bdy / bdx *'exvY~  
                b_bd = p2y - k_bd * p2x X]y3~|K  
                p_x = p1x m^]/ /j  
                p_y = k_bd * p_x + b_bd tQ2*kE  
             Case "ac_y_bd_n" Z$WT ~V  
                'ac线段方程 _MMz x2}  
                k_ac = acy / acx $T3/*xN  
                b_ac = p1y - k_ac * p1x J anLJe)  
                p_x = p2x +[~\\X  
                p_y = k_ac * p_x + b_ac /I6?t= ?<  
            Case "ac_y_bd_y" D4o?  
               'ac,bd线段都要求 3)dT+lZ  
               k_ac = acy / acx !4oYQB  
               b_ac = p1y - k_ac * p1x Eda sGCo  
               k_bd = bdy / bdx \19XDqf8  
               b_bd = p2y - k_bd * p2x )(DV~1r=  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) Th,2gX9  
               p_y = k_ac * p_x + b_ac @ZX{q~g!  
            End Select GSpS8wWD }  
          rt(1) = p_x ?hDEFW9&^x  
          rt(2) = p_y sV[|op  
         c+4SGWmO  
    '计算最大半径 7g&_`(  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) $L`7(0U-  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) % )|/s %W  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) *FG@Dts^&  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) F7"Ihb^l  
    Dim bb(5) As Single }^LcKV  
      bb(1) = rr1 88G[XkL$2  
      bb(2) = rr2 F ^E(AE  
      bb(3) = rr3 RKBjrSZg8  
      bb(4) = rr4 Q g"{F},4  
      nb = rr1 3:=XU9p)x  
    For i = 1 To 4 sDbALAp +  
        If nb <= bb(i) Then v3]q2*`G#  
           nb = bb(i) C2Y&qX,  
        End If =20Q! wcu  
    Next i '`3-X];p  
        rt(0) = Sqr(nb) %FF  S&vd  
        rr = rt() XU SfOf(  
      End If I [e7Up  
             {[Yv@CpN  
    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)  0dgR;Dl(  
    ->j9(76"  
    有热压工艺方面的人才或者资料分享下; lv\2vRYw-  
    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 |]I?^:I  
    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.