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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: r'\TS U5!  
    b.;}Hq>  
    {2@96o2}  
     
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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: Shz;)0To  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) 6~>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 I#U44+c  
    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 d*L'`BBsp  
    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: JB<4 m4-  
    1.判断点在区域中函数 f6 nltZ  
    2.计算夹角函数 K<GCP2  
    3.转置函数 I]X<L2  
    4.得到区域中心点,及区域半径函数 +F|[9o z  
    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) \ua.%|  
    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 }g?]B+0  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single :Kiu*&{  
       cax = x2 - x1  >pKI'  
       cay = y2 - y1 D$HxPfDZ  
       cbx = x2 - x3 J++D\x#@  
       cby = y2 - y3 z61 o6mb  
       mo_jj = cax * cbx + cay * cby LKa_ofY  
       mo_ca = Sqr(cax * cax + cay * cay) |4vk@0L  
       mo_cb = Sqr(cbx * cbx + cby * cby) 5 *_#"  
       cos_acb = mo_jj / (mo_ca * mo_cb) V QI7lJV"  
       'ff_cos = cos_acb G1rgp>m  
       If cos_acb >= 1 Then ^gG,}GTl  
       nn = 0 ( C&f~U  
       ElseIf cos_acb <= -1 Then ,P^"X5$   
       nn = 3.14159265258979 J$0*K+m  
       Else M:x(_Lu  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) bPNsy@"6  
       End If \XC1/LZQ  
       'ff_angle = nn -IE;5f#e  
       ff_angle = nn * 180 / 3.14159265258979 X`&E,;bIb  
    End Function
    离线safeng1122
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    只看该作者 4楼 发表于: 2013-04-08
    '判断点在区域内函数 "LYob}_z  
    Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean Z,*VRuA  
    Dim aob, boc, cod, doa, sum As Single 3jeR;N]x  
      If ppx = p1x And ppy = p1y Then %uKD cj  
         point_in = True @:}z\qBM  
         Exit Function V;$lgTs|'  
      End If !T}`h'  
      If ppx = p2x And ppy = p2y Then m9/a!|fBE  
         point_in = True q_!3<.sf  
         Exit Function 4_$f "6  
      End If 1*Z}M%  
       If ppx = p3x And ppy = p3y Then QeGU]WU{  
         point_in = True '?\Hm'8  
         Exit Function b+kb7  
      End If Y#\e~>K  
         @uc%]V<:k  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ^VA)vLj@  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 3'8~H]<W  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) fy-( B;  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) "YivjHa7H  
        sum = aob + boc + cod + doa }G]]0Oi2  
        If 360.01 > sum And sum > 359.99 Then Mf?4 `LM  
           point_in = True Ou/{PK}  
        Else bcQ$S;U)  
           point_in = False BJqM=<nQ  
        End If [.2>=3T  
    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 +?%huJYK,  
    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() \2uQ"kJC  
        '求得中心点坐标 #U^@)g6  
    Dim tt As String ;:v:pg8qc  
    Dim rt(3) As Single ;%Qu;FtC  
        '判断是否平行 F*QGzbv)  
       acx = p3x - p1x WO|#`HM2  
       acy = p3y - p1y )H)HR`  
       bdx = p4x - p2x f)>=.sp  
       bdy = p4y - p2y DEs/?JZG  
       If acx * bdy = acy * bdx Then (%tKGeb  
          rt(0) = 0 f"z96{zo  
          Exit Function Nx~8]h1(  
       Else =YR/|9(  
          '判断斜率存在否 leiP/D6s  
          If p1x = p3x And p2x <> p4x Then O>UR\l|+:2  
             tt = "ac_n_bd_y" <Dl7|M  
          ElseIf p1x <> p3x And p2x = p4x Then g^=p)h3  
             tt = "ac_y_bd_n" >=wlS\:"  
          ElseIf p1x <> p3x And p2x <> p4x Then TwY]c<t  
             tt = "ac_y_bd_y" k<m{Wp;-  
          End If H.*XoktC]  
        Select Case tt k5(@n>p  
             Case "ac_n_bd_y" -r[l{ce  
                'bd线段方程 rlgp1>89  
                k_bd = bdy / bdx LG(bdj"NM  
                b_bd = p2y - k_bd * p2x f Vw+8[d0  
                p_x = p1x K^EW*6vB8O  
                p_y = k_bd * p_x + b_bd P/4]x@{ih  
             Case "ac_y_bd_n" 5Osx__6$t  
                'ac线段方程 ]JbGP{UiN  
                k_ac = acy / acx .#@*)1A#t  
                b_ac = p1y - k_ac * p1x |.X?IJ`  
                p_x = p2x Pr9$( 6MX  
                p_y = k_ac * p_x + b_ac XB zcbS+  
            Case "ac_y_bd_y" :A>cf}  
               'ac,bd线段都要求 {U>B\D  
               k_ac = acy / acx p1q"[)WVn^  
               b_ac = p1y - k_ac * p1x n)gzHch  
               k_bd = bdy / bdx tRFj<yuaq  
               b_bd = p2y - k_bd * p2x uD_iyK0,  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) -m3 O\X  
               p_y = k_ac * p_x + b_ac V0XQG}  
            End Select uPhFBD7  
          rt(1) = p_x s7[du_)  
          rt(2) = p_y @h$cHZ  
         Pd6p)zj  
    '计算最大半径 ycTX\.KV  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 1Jjay#  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) q{ i9VJ]  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 9 "7(Jq  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) u,I_p[`E  
    Dim bb(5) As Single J4&d6[40  
      bb(1) = rr1 &]iiBp#2  
      bb(2) = rr2 +iY.YV  
      bb(3) = rr3 8c3Qd  
      bb(4) = rr4 j#rjYiYKy  
      nb = rr1 },lHa!<^  
    For i = 1 To 4 LB1LQ 0M  
        If nb <= bb(i) Then jhl9  
           nb = bb(i) @@M 2s(  
        End If hCS|(8g  
    Next i 3 - Nwg9 U  
        rt(0) = Sqr(nb) .5 Sw  
        rr = rt() R7pdwKD  
      End If MOi.bHCQJP  
             xM"k qRZ  
    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)  0 $Ygt0d  
    8nV#\J9  
    有热压工艺方面的人才或者资料分享下; WC0gJy  
    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 &>%R)?SZh  
    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.