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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: AFA*_9Ut  
    .Cd$=v6  
    )y Y;%  
     
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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: Fje%hcV  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) 4h(Hy&1C  
    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 $*ZHk0 7x  
    3.网点区域密度可调;把区域分成若干小块,每块的密度不同即可 |U0@(H  
    离线safeng1122
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    只看该作者 2楼 发表于: 2013-04-08
    以下是几个重要的函数: vZsVxx99  
    1.判断点在区域中函数 p^!p7B`qe.  
    2.计算夹角函数 #a:C=GV;4  
    3.转置函数 sP7(1)\  
    4.得到区域中心点,及区域半径函数 "f+2_8%s+  
    5.再有就是若干个点抽取其中一部分;或者采用随机分布(该方法会有重合点,所以没采用) sq$|Pad[  
    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 1g+<`1=KT  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single m~A/.t%=  
       cax = x2 - x1 |Rc#Q<Vh|  
       cay = y2 - y1 &9>d  
       cbx = x2 - x3 Cz%ih#^b  
       cby = y2 - y3 ' r/1+.  
       mo_jj = cax * cbx + cay * cby DSp@  
       mo_ca = Sqr(cax * cax + cay * cay) JZ [&:  
       mo_cb = Sqr(cbx * cbx + cby * cby) +l\Dp  
       cos_acb = mo_jj / (mo_ca * mo_cb) Heu@{t.[!D  
       'ff_cos = cos_acb 4j5 "{  
       If cos_acb >= 1 Then w.\:I[  
       nn = 0 ej `$-hBBV  
       ElseIf cos_acb <= -1 Then -u{:39y{n  
       nn = 3.14159265258979 ikC;N5Sw  
       Else !RI&FcK  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) $}@l l^  
       End If S6 *dp68  
       'ff_angle = nn Rx.0P6s  
       ff_angle = nn * 180 / 3.14159265258979 V'B 6C#jT  
    End Function
    离线safeng1122
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    只看该作者 4楼 发表于: 2013-04-08
    '判断点在区域内函数 UT-=5  
    Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean 827N?pU$)  
    Dim aob, boc, cod, doa, sum As Single :BS`Q/<w  
      If ppx = p1x And ppy = p1y Then : SNp"|  
         point_in = True [(hENX}o :  
         Exit Function <Ip}uy[Y  
      End If 6m9Z5:xG  
      If ppx = p2x And ppy = p2y Then yI!K quMC  
         point_in = True z|Xl%8  
         Exit Function s$Mj4_p3l  
      End If I/adzLQ  
       If ppx = p3x And ppy = p3y Then xAI<<[-  
         point_in = True *-7O| ''  
         Exit Function Kxq~,g=t  
      End If fqi5 84  
         @m6E*2Gg  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) B N=,>-O%  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ]du pU"VV  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) lH[N*9G(  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) jm!G@k6TA  
        sum = aob + boc + cod + doa li'#< "R?'  
        If 360.01 > sum And sum > 359.99 Then j JW0a\0  
           point_in = True j$,`EBf`:<  
        Else 8p5u1 ;2  
           point_in = False IzG7!K  
        End If Ky+TgR  
    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 2a{eJ89f  
    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() +m"iJW0  
        '求得中心点坐标 RtSk;U1  
    Dim tt As String 1iUy*p65:  
    Dim rt(3) As Single {pVD`#Tl[  
        '判断是否平行 yCwQ0|  
       acx = p3x - p1x ]_-<[0  
       acy = p3y - p1y [hs{{II  
       bdx = p4x - p2x $]O\Ryf6  
       bdy = p4y - p2y ex-`+cF  
       If acx * bdy = acy * bdx Then WHU& 9N  
          rt(0) = 0 %;gD_H4mm  
          Exit Function TygR G+G-  
       Else ^CX~>j\(  
          '判断斜率存在否 9khD7v   
          If p1x = p3x And p2x <> p4x Then ;yH/GN#O  
             tt = "ac_n_bd_y" DJeG  
          ElseIf p1x <> p3x And p2x = p4x Then EPyFM_k  
             tt = "ac_y_bd_n" UlyX$f%2  
          ElseIf p1x <> p3x And p2x <> p4x Then f F?=W  
             tt = "ac_y_bd_y" k+&|*!j  
          End If JTVCaL3Z  
        Select Case tt SwQb"  
             Case "ac_n_bd_y" BH=vI<D  
                'bd线段方程 J6jrtLh  
                k_bd = bdy / bdx <jV_J+#  
                b_bd = p2y - k_bd * p2x Y1+f(Q  
                p_x = p1x 3dXyKi  
                p_y = k_bd * p_x + b_bd B;^7Yu0,  
             Case "ac_y_bd_n" #[IQmU23  
                'ac线段方程 i2EB.Zlv  
                k_ac = acy / acx qV5ME #TJ  
                b_ac = p1y - k_ac * p1x "xw2@jGpG  
                p_x = p2x F`'e/  
                p_y = k_ac * p_x + b_ac Ucv-}oa-?  
            Case "ac_y_bd_y" =8[HC}s|$  
               'ac,bd线段都要求 >hHn{3y  
               k_ac = acy / acx "Y4 tt0I  
               b_ac = p1y - k_ac * p1x gg5`\}  
               k_bd = bdy / bdx X|X6^}  
               b_bd = p2y - k_bd * p2x lepgmQ|oY  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) %A?Ym33  
               p_y = k_ac * p_x + b_ac ;[&g`%-H<  
            End Select jh9^5"vQ  
          rt(1) = p_x RoP z?,u  
          rt(2) = p_y +b 1lCa_  
         Rom|Bqo;  
    '计算最大半径 -]HO8}-Rjs  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) C)Mh  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 6M F%$K3  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) eo"6 \3z  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 87y$=eZ  
    Dim bb(5) As Single 9J*m!-hOY  
      bb(1) = rr1 ^KmyB6Yg  
      bb(2) = rr2 #}l }1^$  
      bb(3) = rr3 yjc:+Y{5'  
      bb(4) = rr4 >AV?g8B;  
      nb = rr1 WC0@g5;1[  
    For i = 1 To 4 Bx;bc  
        If nb <= bb(i) Then t/pHdxX*C7  
           nb = bb(i) 8&B{bS  
        End If HX?5O$<<N  
    Next i H"6:!;9,  
        rt(0) = Sqr(nb) ewD61Y8-  
        rr = rt() + ,0RrD )  
      End If '3aDvV0  
             uG~%/7Qt{  
    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)  m>yk4@a  
    Ola>] 0l  
    有热压工艺方面的人才或者资料分享下; bW7tJ  
    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 hbD@B.PD  
    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.