切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 9954阅读
    • 26回复

    [分享]绝对随机网点分布(excel之vba) [复制链接]

    上一主题 下一主题
    离线safeng1122
     
    发帖
    286
    光币
    26
    光券
    0
    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: ~c>*3*  
    SbNs#  
    olNgtSX  
     
    分享到
    离线safeng1122
    发帖
    286
    光币
    26
    光券
    0
    只看该作者 1楼 发表于: 2013-04-08
    关键点说几个: Y6T1_XG  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) tAfdbt  
    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 ]UG+<V ,:  
    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 |1GR:b24  
    离线safeng1122
    发帖
    286
    光币
    26
    光券
    0
    只看该作者 2楼 发表于: 2013-04-08
    以下是几个重要的函数: Qp{gV Ys  
    1.判断点在区域中函数 |oq27*ix~m  
    2.计算夹角函数 YNc] x>  
    3.转置函数 pK=$)<I"6  
    4.得到区域中心点,及区域半径函数 G[4TT#  
    5.再有就是若干个点抽取其中一部分;或者采用随机分布(该方法会有重合点,所以没采用) {C>.fg%t  
    6.文件开启与关闭,这个最常见了,就不说了
    离线safeng1122
    发帖
    286
    光币
    26
    光券
    0
    只看该作者 3楼 发表于: 2013-04-08
    '计算夹角函数 Mq-QWx"P  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single H`/Q hE  
       cax = x2 - x1 B .p&,K  
       cay = y2 - y1 BIf E+L(  
       cbx = x2 - x3 /\L|F?+@  
       cby = y2 - y3 fY@Y$S`Fh  
       mo_jj = cax * cbx + cay * cby ;SAurG$  
       mo_ca = Sqr(cax * cax + cay * cay) 5~T`R~Uqb  
       mo_cb = Sqr(cbx * cbx + cby * cby) 5t]}(.0+  
       cos_acb = mo_jj / (mo_ca * mo_cb) S pxkB!  
       'ff_cos = cos_acb av>c  
       If cos_acb >= 1 Then ea3;1-b:  
       nn = 0 uGm~ Oo  
       ElseIf cos_acb <= -1 Then y:Xs/RS  
       nn = 3.14159265258979 fj X~"U  
       Else c|<*w[%C  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) (4_7ICFI  
       End If -x~h.s,  
       'ff_angle = nn >r%L=22+  
       ff_angle = nn * 180 / 3.14159265258979 &V7@ TZ  
    End Function
    离线safeng1122
    发帖
    286
    光币
    26
    光券
    0
    只看该作者 4楼 发表于: 2013-04-08
    '判断点在区域内函数 8hWB TUN  
    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 )i8Hdtn  
    Dim aob, boc, cod, doa, sum As Single ;xFx%^M}br  
      If ppx = p1x And ppy = p1y Then IXb]\ )  
         point_in = True Z;kRQ  
         Exit Function *yJCnoF  
      End If x)eYqH~i  
      If ppx = p2x And ppy = p2y Then 1e`/N+6u  
         point_in = True Q!DH8'|4?L  
         Exit Function s%h|>l[lKT  
      End If 5/j7C>  
       If ppx = p3x And ppy = p3y Then 4|Z;EAFx  
         point_in = True ;J|sH>i  
         Exit Function PW(4-H  
      End If pvL)BD  
         f49pIcAq  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Jy&O4g/'5  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) q$)$?"  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) P" +!mSe^~  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) /DOV/>@5%  
        sum = aob + boc + cod + doa *Ag</g@ h  
        If 360.01 > sum And sum > 359.99 Then .?7u'%6x?{  
           point_in = True \l^L?69  
        Else qfp,5@p  
           point_in = False ~jdvxoX-  
        End If _'9("m V  
    End Function
    离线safeng1122
    发帖
    286
    光币
    26
    光券
    0
    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 GE;S5 X]X  
    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() D$C>ZF  
        '求得中心点坐标 nx #0*r}5  
    Dim tt As String ks92-%;:  
    Dim rt(3) As Single E(J@A'cX  
        '判断是否平行 Tb~|p_;o  
       acx = p3x - p1x e>yPFXSk  
       acy = p3y - p1y sywSvnPuYZ  
       bdx = p4x - p2x EfxW^zm)  
       bdy = p4y - p2y Dep.Qfv{-  
       If acx * bdy = acy * bdx Then <A{|=2<  
          rt(0) = 0 A*d Pw.  
          Exit Function L?~>eT  
       Else eVL #3|=  
          '判断斜率存在否 8<BYAHY^  
          If p1x = p3x And p2x <> p4x Then !|!k9~v!  
             tt = "ac_n_bd_y" 0=N,y  
          ElseIf p1x <> p3x And p2x = p4x Then 3r{3HaN(^'  
             tt = "ac_y_bd_n" N?cvQR{r9  
          ElseIf p1x <> p3x And p2x <> p4x Then W+HiH`Qb]  
             tt = "ac_y_bd_y" +NML>g#F~z  
          End If XY1D<  
        Select Case tt  "R8:s  
             Case "ac_n_bd_y" ITcgp K6k  
                'bd线段方程 X.~z:W+  
                k_bd = bdy / bdx p mv6m  
                b_bd = p2y - k_bd * p2x Ir%L%MuR]  
                p_x = p1x "Zk# bQ2j  
                p_y = k_bd * p_x + b_bd bv %Bo4s  
             Case "ac_y_bd_n" Y"Y%JJ.J  
                'ac线段方程 GYv D*?uBc  
                k_ac = acy / acx _~q!<-Z  
                b_ac = p1y - k_ac * p1x )OjTn"  
                p_x = p2x ?D 8<}~Do  
                p_y = k_ac * p_x + b_ac kV >[$6  
            Case "ac_y_bd_y" @9,=|kxK  
               'ac,bd线段都要求 m+66x {M2c  
               k_ac = acy / acx UZcsMMKH  
               b_ac = p1y - k_ac * p1x e6?iQ0  
               k_bd = bdy / bdx ^\<nOzU?  
               b_bd = p2y - k_bd * p2x  :P,g,  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) z{wW6sgPr  
               p_y = k_ac * p_x + b_ac e}@VR<h  
            End Select }~W:3A{7;  
          rt(1) = p_x :/rl \woA>  
          rt(2) = p_y zN3[W`q+m  
         eBlWwUy*6f  
    '计算最大半径 _H{6{!=y  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Q{+*F8%8V<  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) E6 g]EE  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Whoqs_Mm{  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) kSW=DE|#}  
    Dim bb(5) As Single G909R>  
      bb(1) = rr1 r4YiXss  
      bb(2) = rr2 " V[=U13  
      bb(3) = rr3 BZJ\tPSR  
      bb(4) = rr4 ko-3`hX`  
      nb = rr1 "0*yD[2  
    For i = 1 To 4 QR+xPY~  
        If nb <= bb(i) Then "Wz8f  
           nb = bb(i) pyHU +B  
        End If $7bLw)7  
    Next i GG0H3MSc  
        rt(0) = Sqr(nb) uez"{_I  
        rr = rt() <bSG|VqnH  
      End If jF$bCbAUce  
             DB~3(r?K  
    End Function
    离线lifei0715
    发帖
    1236
    光币
    8439
    光券
    0
    只看该作者 6楼 发表于: 2013-04-08
    高手啊.人才啊.
    离线safeng1122
    发帖
    286
    光币
    26
    光券
    0
    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)  &s(mbpV  
    O[|_~v:^  
    有热压工艺方面的人才或者资料分享下; ;=UkTn}N?l  
    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 e#AmtheZR  
    离线windcgp86
    发帖
    151
    光币
    39
    光券
    0
    只看该作者 8楼 发表于: 2013-04-10
    高手真多!
    离线allansweruni
    发帖
    100
    光币
    25
    光券
    0
    只看该作者 9楼 发表于: 2013-04-11
    楼主威武霸气.