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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: ,yqzk.  
    GS$k  
    D4vmBVT  
     
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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: F@*lR(4C  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) /j)VES  
    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 ~ghz%${`  
    3.网点区域密度可调;把区域分成若干小块,每块的密度不同即可 _9@?Th&_e  
    离线safeng1122
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    只看该作者 2楼 发表于: 2013-04-08
    以下是几个重要的函数: M$W#Q\<*#r  
    1.判断点在区域中函数 !bcbzg2d&  
    2.计算夹角函数 &+j^{a  
    3.转置函数 xI4I1"/  
    4.得到区域中心点,及区域半径函数 9aU:[]w  
    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) ._&lG3'  
    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 BR^J y<^F'  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single bQy%$7UmX,  
       cax = x2 - x1 J=X% xb  
       cay = y2 - y1 =[K)<5,@  
       cbx = x2 - x3 hu|hOr8  
       cby = y2 - y3 ]X~g@O{>_  
       mo_jj = cax * cbx + cay * cby !ix<|F5  
       mo_ca = Sqr(cax * cax + cay * cay) ^B5cNEO  
       mo_cb = Sqr(cbx * cbx + cby * cby) uK:-g,;  
       cos_acb = mo_jj / (mo_ca * mo_cb) 0Mu8ZVI{  
       'ff_cos = cos_acb unnx#e]  
       If cos_acb >= 1 Then Hm VTfH'  
       nn = 0 ]kkBgjQbS  
       ElseIf cos_acb <= -1 Then ~{vdP=/WP  
       nn = 3.14159265258979 -?nT mzRc  
       Else ING_:XpnJ  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ij(4)=  
       End If GWInN8.5  
       'ff_angle = nn U('<iw,Yy  
       ff_angle = nn * 180 / 3.14159265258979 %p2x^air  
    End Function
    离线safeng1122
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    只看该作者 4楼 发表于: 2013-04-08
    '判断点在区域内函数 'n[+r}3  
    Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean W/r mm*  
    Dim aob, boc, cod, doa, sum As Single vA;F]epr!  
      If ppx = p1x And ppy = p1y Then +F o$o  
         point_in = True QG|GXp_q`  
         Exit Function ls24ccOs  
      End If k9) u 3  
      If ppx = p2x And ppy = p2y Then *?bk?*?s  
         point_in = True <.WM-Z  
         Exit Function PDt<lJU+X  
      End If vV.~76AD5  
       If ppx = p3x And ppy = p3y Then r)p2'+}pV  
         point_in = True *1W, M zg  
         Exit Function (~Uel1~@  
      End If A!{.|x[S44  
         qEJ8o.D-=  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) {@V3?pG?p  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) )@,90Vhh  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) t @(9ga(  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 9Yl8n dP^E  
        sum = aob + boc + cod + doa 30?LsYXL62  
        If 360.01 > sum And sum > 359.99 Then ojx'g8yO  
           point_in = True V3mjb H>F  
        Else sm;E2BR$ `  
           point_in = False m-ph}  
        End If #P%1{l5m  
    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 2W3NL|P  
    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() =.36y9Mfo  
        '求得中心点坐标 kmlG3hOR,  
    Dim tt As String ]C16y. ~e  
    Dim rt(3) As Single rQ~\~g[tP  
        '判断是否平行 JF~1' "_f:  
       acx = p3x - p1x sI&i{D  
       acy = p3y - p1y vi]r  
       bdx = p4x - p2x *jM_wwG  
       bdy = p4y - p2y =db'#m{$  
       If acx * bdy = acy * bdx Then C8IkpAD  
          rt(0) = 0 M{?zvq?d  
          Exit Function ,3Wb4so  
       Else iq"ob8.  
          '判断斜率存在否 #l*a~^dhqC  
          If p1x = p3x And p2x <> p4x Then .dx 4,|6  
             tt = "ac_n_bd_y"  0]AN;  
          ElseIf p1x <> p3x And p2x = p4x Then 4q>7OB:e  
             tt = "ac_y_bd_n" {=UFk-$=  
          ElseIf p1x <> p3x And p2x <> p4x Then fdlvn*H  
             tt = "ac_y_bd_y" 6'xomRpYN  
          End If 5D,.^a1 A  
        Select Case tt d<Ggw#}:m  
             Case "ac_n_bd_y" -S"5{N73  
                'bd线段方程 AV40:y\RW  
                k_bd = bdy / bdx }]AT _bh,  
                b_bd = p2y - k_bd * p2x 'X =p7 d|'  
                p_x = p1x P$Z}  
                p_y = k_bd * p_x + b_bd {5^K Xj$B  
             Case "ac_y_bd_n" nX0HT )}  
                'ac线段方程 !FTNmyM~F  
                k_ac = acy / acx ^SZw`]  
                b_ac = p1y - k_ac * p1x L0rip5[;d  
                p_x = p2x +R-h ,$\=7  
                p_y = k_ac * p_x + b_ac u!Xb?:3uj  
            Case "ac_y_bd_y" ~C&*.ZR  
               'ac,bd线段都要求 *7ZGq(O  
               k_ac = acy / acx V=pMq?Nr  
               b_ac = p1y - k_ac * p1x UMV)wy|j  
               k_bd = bdy / bdx #j;Tb2&w  
               b_bd = p2y - k_bd * p2x ]' Y|N l  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) w|IjQ1{  
               p_y = k_ac * p_x + b_ac N0i!l|G6  
            End Select U{6oLqwq3Y  
          rt(1) = p_x ~h-C&G ,v  
          rt(2) = p_y 5%*w<6<_z  
         @@I7$*  
    '计算最大半径 vT|`%~Be  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) <5S@ORN  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) uG!:Z6%p  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) C{ EAmv'  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ^/HW$8wEi  
    Dim bb(5) As Single 0RUi\X4HI  
      bb(1) = rr1 )qL&%xz  
      bb(2) = rr2 H`~;|6}]n  
      bb(3) = rr3 $B;_Jo\|  
      bb(4) = rr4 ,~COZi;R.D  
      nb = rr1 H&#{l)  
    For i = 1 To 4 h.)h@$d  
        If nb <= bb(i) Then v2Bzx/F:  
           nb = bb(i) ]hA,LY f  
        End If V A<5uk04K  
    Next i + WVIZZ8  
        rt(0) = Sqr(nb) "- 31'R-  
        rr = rt() QT! 4[,4  
      End If *O,H5lwU  
             k|xtrW`qo;  
    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)  mLh kI!4[  
    j;b42G~p  
    有热压工艺方面的人才或者资料分享下; e~l#4{w  
    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 h `}}  
    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.