切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 9973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: 5X-cDY*|  
    N LC}XL  
    l+Tw#2s$  
     
    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: (a1s~  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) y4Plm.  
    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 nlK"2/W  
    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 /'}O-h  
    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: p}}o#a~V),  
    1.判断点在区域中函数 j#0@%d  
    2.计算夹角函数 y%\kgWV  
    3.转置函数 Ah28D!Gor  
    4.得到区域中心点,及区域半径函数 hn-9l1~!h  
    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) 5B@+$D[0?3  
    6.文件开启与关闭,这个最常见了,就不说了
    离线safeng1122
    发帖
    286
    光币
    26
    光券
    0
    只看该作者 3楼 发表于: 2013-04-08
    '计算夹角函数 soXeHjNl  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single sC48o'8(  
       cax = x2 - x1 TB4|dj-%  
       cay = y2 - y1 CbA!  
       cbx = x2 - x3 {d(@o!;Fi  
       cby = y2 - y3 <MI>>$seiJ  
       mo_jj = cax * cbx + cay * cby iXMs*G cK  
       mo_ca = Sqr(cax * cax + cay * cay) u)M dFz  
       mo_cb = Sqr(cbx * cbx + cby * cby) KZ pqbI Z  
       cos_acb = mo_jj / (mo_ca * mo_cb) \SS1-UbL  
       'ff_cos = cos_acb ksT2_Ic  
       If cos_acb >= 1 Then B_anO{3$4  
       nn = 0 $uF} GP_)  
       ElseIf cos_acb <= -1 Then Z~ VOO7|m  
       nn = 3.14159265258979 k/?5Fs!#  
       Else gN Xg  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) J84Q|E  
       End If dQQh$*IL?{  
       'ff_angle = nn /Zap'S/  
       ff_angle = nn * 180 / 3.14159265258979 (hS j4Cp  
    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 z;JyHC)  
    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 qI"Xh" c?  
    Dim aob, boc, cod, doa, sum As Single <spVUp  
      If ppx = p1x And ppy = p1y Then $DeHo"mg7m  
         point_in = True J wL}|o6  
         Exit Function `h}fS4CO  
      End If (B{`In8G>y  
      If ppx = p2x And ppy = p2y Then w5w,jD[  
         point_in = True D]\of#%T  
         Exit Function ;fw}<M!6  
      End If (-viP  
       If ppx = p3x And ppy = p3y Then Kur3Gf X  
         point_in = True /]zn8 d  
         Exit Function }lt5!u~}  
      End If "`qmeZ$rg  
         T^> ST  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Zvz Zs  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) kVR_?ch{  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Ybo:2e  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) hkB/ OJ  
        sum = aob + boc + cod + doa v1h\ 6r'  
        If 360.01 > sum And sum > 359.99 Then )voJq\Y)%  
           point_in = True Is1P,`*!  
        Else <ZO"0oz%  
           point_in = False /j46`F  
        End If *;cvG?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 s^f7w  
    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() T_iX1blrgh  
        '求得中心点坐标 Buc{dcL/  
    Dim tt As String FM$$0}X  
    Dim rt(3) As Single m1bkY#\ U|  
        '判断是否平行 NxY B)`~  
       acx = p3x - p1x W]Bc7JM]T+  
       acy = p3y - p1y 0V;9v  
       bdx = p4x - p2x [$\KS_,Mn  
       bdy = p4y - p2y WH|TdU$V  
       If acx * bdy = acy * bdx Then jW]Q-  
          rt(0) = 0 3dO~Na`S  
          Exit Function ;]v{3m  
       Else +4L]Z ;k  
          '判断斜率存在否 0'wchy>  
          If p1x = p3x And p2x <> p4x Then mIW8K ):  
             tt = "ac_n_bd_y" |"]#jx*8KC  
          ElseIf p1x <> p3x And p2x = p4x Then F8xz^UQO  
             tt = "ac_y_bd_n" Hk&op P9)  
          ElseIf p1x <> p3x And p2x <> p4x Then n_~u!Ky_P  
             tt = "ac_y_bd_y" -gn!8G1  
          End If 74_':,u;]~  
        Select Case tt  4,g_$)  
             Case "ac_n_bd_y" _2Zc?*4  
                'bd线段方程 ]{Y7mpdB  
                k_bd = bdy / bdx ]@Z[/z%~04  
                b_bd = p2y - k_bd * p2x \/XU v(  
                p_x = p1x ":v^Y 9  
                p_y = k_bd * p_x + b_bd B*Z}=$1j  
             Case "ac_y_bd_n" ^8.s"4{  
                'ac线段方程 M!i["($_  
                k_ac = acy / acx xAwP  
                b_ac = p1y - k_ac * p1x #W$6[#7=I  
                p_x = p2x G*s5GG@Z.  
                p_y = k_ac * p_x + b_ac y^0 mf|  
            Case "ac_y_bd_y" Xsk/U++  
               'ac,bd线段都要求 @`mr|-Rp@  
               k_ac = acy / acx d9iVuw0u<  
               b_ac = p1y - k_ac * p1x a``/x_EZMn  
               k_bd = bdy / bdx Y{KN:|i.!  
               b_bd = p2y - k_bd * p2x 8Y"R@'~  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) >//yvkZ9,  
               p_y = k_ac * p_x + b_ac = }ELu@\V[  
            End Select -,186ZVZ  
          rt(1) = p_x G^ShN45   
          rt(2) = p_y \B4f5 L8k  
         9y'To JZ6  
    '计算最大半径 ]qb>O:T  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) n\GN}?4  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ^*G UcQ$  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ?`= <*{_o  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) fJ  GwT  
    Dim bb(5) As Single /&N\#;kK?b  
      bb(1) = rr1 Ddh  
      bb(2) = rr2 I*z|_}$  
      bb(3) = rr3 ,UYe OM2Ao  
      bb(4) = rr4 f4O}WU}l{s  
      nb = rr1 5{gv \S1  
    For i = 1 To 4 7aS%;EU  
        If nb <= bb(i) Then <<DPer2  
           nb = bb(i) BN&eU'Dl]  
        End If A(9$!%#+L  
    Next i qP[_!C.  
        rt(0) = Sqr(nb) ZU$QwI8  
        rr = rt() ux8K$$$  
      End If :x,dYJm  
             eN'b" _D  
    End Function
    离线lifei0715
    发帖
    1237
    光币
    8444
    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)  Oiw!d6"Ovq  
    ]E*xn  
    有热压工艺方面的人才或者资料分享下; .B! L+M< [  
    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 u$ vLwJ|o  
    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.