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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: &WV 9%fI  
    $GK m`I"  
    FQ ^^6Rl  
     
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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: &H>dE]Hq,  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) [gY__  
    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 r1?FH2Ns  
    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 ;5_S  
    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: hjT1SW\I  
    1.判断点在区域中函数 o/ 5 Fg>d  
    2.计算夹角函数 zSXC  
    3.转置函数 a];g  
    4.得到区域中心点,及区域半径函数 B)`X 7uG  
    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) mf'1.{  
    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 uK5Px!  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single `:4cb $  
       cax = x2 - x1 zghm2{:`?g  
       cay = y2 - y1 Z`KmH.l!  
       cbx = x2 - x3 UQ~rVUo.c  
       cby = y2 - y3 [40 YoVlfM  
       mo_jj = cax * cbx + cay * cby TI  
       mo_ca = Sqr(cax * cax + cay * cay) b1o(CG(}*  
       mo_cb = Sqr(cbx * cbx + cby * cby) k 'b|#c9c  
       cos_acb = mo_jj / (mo_ca * mo_cb) c.WT5|:qw  
       'ff_cos = cos_acb Dw3! ibg  
       If cos_acb >= 1 Then M(jH"u&f  
       nn = 0 1hG O*cq!  
       ElseIf cos_acb <= -1 Then W'$~mK\  
       nn = 3.14159265258979 L]}|{< 3\  
       Else 9@B+$~:}7  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) A-$BB=Ot  
       End If e X@q'Zi  
       'ff_angle = nn m`"s$\fah  
       ff_angle = nn * 180 / 3.14159265258979 )O Cr6UR  
    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 (~oPr+d  
    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 jGCW^#GE  
    Dim aob, boc, cod, doa, sum As Single /H% pOL6(r  
      If ppx = p1x And ppy = p1y Then )%7A. UO)  
         point_in = True \^cn}db)  
         Exit Function {xX|5/z  
      End If )J0VB't  
      If ppx = p2x And ppy = p2y Then &Te:l-x  
         point_in = True *79<ypKG$  
         Exit Function M{QNpoM  
      End If <k!G%R<9  
       If ppx = p3x And ppy = p3y Then ngjbE+  
         point_in = True elN3B91\6r  
         Exit Function e1-=|!U7#  
      End If .YkKIei  
         ;xc  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) J:(l&  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) #a&Vx&7L  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) HChewrUAn  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) "e"`Or  
        sum = aob + boc + cod + doa ^ytd~iK8  
        If 360.01 > sum And sum > 359.99 Then F t}tIP7  
           point_in = True j; C(:6#J  
        Else Y>+D\|%Q  
           point_in = False 2i)y'+s  
        End If &}uO ]0bR  
    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 -1R~3j1_  
    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() i469<^A  
        '求得中心点坐标 R&QT  'i  
    Dim tt As String Tla*V#:Ve  
    Dim rt(3) As Single 6 D O E6  
        '判断是否平行 =h)H`  
       acx = p3x - p1x 0[];c$r<  
       acy = p3y - p1y g`j%jQuY  
       bdx = p4x - p2x J}x5Ko@  
       bdy = p4y - p2y -=RXhE_{  
       If acx * bdy = acy * bdx Then DF~w20+  
          rt(0) = 0 VtVnht1  
          Exit Function NJp;t[v.^  
       Else 5?O"N  
          '判断斜率存在否 0ePZxOSjD  
          If p1x = p3x And p2x <> p4x Then CeQcnJU  
             tt = "ac_n_bd_y" 4u&doSXR  
          ElseIf p1x <> p3x And p2x = p4x Then J L3A/^  
             tt = "ac_y_bd_n" wKYfqNCH  
          ElseIf p1x <> p3x And p2x <> p4x Then ivm.ng[  
             tt = "ac_y_bd_y" cZYX[.oIB  
          End If Rq 7ksTo  
        Select Case tt ubL Lhf  
             Case "ac_n_bd_y" ,rd+ dN  
                'bd线段方程 DXUI/C f  
                k_bd = bdy / bdx i<bs{Cu_S  
                b_bd = p2y - k_bd * p2x _D:/?=y;e  
                p_x = p1x | ] YT6-?.  
                p_y = k_bd * p_x + b_bd j\a?n4g -  
             Case "ac_y_bd_n" >C i=H(8vN  
                'ac线段方程 A1C@'9R*  
                k_ac = acy / acx 09"~<W8  
                b_ac = p1y - k_ac * p1x Gd"*mL d  
                p_x = p2x 5HU>o|.  
                p_y = k_ac * p_x + b_ac y.nw6.`MR  
            Case "ac_y_bd_y" 8_lD*bEt   
               'ac,bd线段都要求 yE7pCgXt  
               k_ac = acy / acx v<) }T5~r  
               b_ac = p1y - k_ac * p1x d_`Ze.^   
               k_bd = bdy / bdx B}(YD;7vJ  
               b_bd = p2y - k_bd * p2x ()?)Ybqss  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) exhF5,AW|K  
               p_y = k_ac * p_x + b_ac GA|q[<U  
            End Select 1.!(#I3  
          rt(1) = p_x M3Z yf  
          rt(2) = p_y =$'Zmb [D  
         :$WRV-  
    '计算最大半径 OjCT%6hy;  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ?Cws25G  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ;V;4#  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) H(AYtnvB  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) UYPBKf]A9  
    Dim bb(5) As Single QV't+)uUVo  
      bb(1) = rr1 JUE>g8\b  
      bb(2) = rr2 *~vRbD$q  
      bb(3) = rr3 8P*n|]B.'  
      bb(4) = rr4 YMWy5 \  
      nb = rr1 l YhwV\3  
    For i = 1 To 4 [bcqaT  
        If nb <= bb(i) Then 2vXMrh\  
           nb = bb(i) XBc+_=)$  
        End If Z(.Tl M2h  
    Next i Qknd^%  
        rt(0) = Sqr(nb) =19]a  
        rr = rt() ,&k 5Qq  
      End If ;)kBJ @  
             sJD"u4#y  
    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)  Pv'x|p*  
    V]AL'}( 0  
    有热压工艺方面的人才或者资料分享下; bcZonS  
    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 0 QpWt  
    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.