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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: 8${Yu  
    t@O4 !mFH  
    {BlKVsQ  
     
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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: BLvI[b|3gn  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) K9J"Q4pEC  
    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 mzX <!  
    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 V ^U1o[`  
    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: >Lo!8Hen  
    1.判断点在区域中函数 Yv`8{_8L  
    2.计算夹角函数 "k${5wk#Fl  
    3.转置函数 !j3V'XU#Zn  
    4.得到区域中心点,及区域半径函数 dLSnhZ  
    5.再有就是若干个点抽取其中一部分;或者采用随机分布(该方法会有重合点,所以没采用) R "&(Ae?LR  
    6.文件开启与关闭,这个最常见了,就不说了
    离线safeng1122
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    只看该作者 3楼 发表于: 2013-04-08
    '计算夹角函数 4nhe *ip  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single sJlX ]\RLQ  
       cax = x2 - x1 toipEp<ci  
       cay = y2 - y1 / -=(51}E  
       cbx = x2 - x3 Zw5\{Z0  
       cby = y2 - y3 n(Up?_  
       mo_jj = cax * cbx + cay * cby T$]2U>=<J  
       mo_ca = Sqr(cax * cax + cay * cay) ~PNO|]8j  
       mo_cb = Sqr(cbx * cbx + cby * cby) X*~NE\  
       cos_acb = mo_jj / (mo_ca * mo_cb)  :*M\z3`k  
       'ff_cos = cos_acb ]kmOX  
       If cos_acb >= 1 Then /s%I(iP4  
       nn = 0 0;)6ZU  
       ElseIf cos_acb <= -1 Then /S;o2\  
       nn = 3.14159265258979 (%>Sln5hq  
       Else xLZQ\2q  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) \QUvImT  
       End If ED/-,>[f  
       'ff_angle = nn %uGA+ \b  
       ff_angle = nn * 180 / 3.14159265258979 !v2,lH  
    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 T , =ga  
    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 2al~`  
    Dim aob, boc, cod, doa, sum As Single 3i(k6)H$4  
      If ppx = p1x And ppy = p1y Then ~~1~_0?e  
         point_in = True *vhm  
         Exit Function n@L!{zY  
      End If U>;itHW/  
      If ppx = p2x And ppy = p2y Then !E_uQ?/w]Z  
         point_in = True l``1^&K  
         Exit Function ):78GVp  
      End If nu0bJ:0aLd  
       If ppx = p3x And ppy = p3y Then 6sy%KO*A  
         point_in = True [/uKo13  
         Exit Function :e@JESlLf  
      End If ;(0:6P8I  
         hqD;<:.  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) M]` Q4\  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Dlj=$25  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) W,{`)NWg  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) H5RHA^p|  
        sum = aob + boc + cod + doa 'v|2} T*  
        If 360.01 > sum And sum > 359.99 Then 6 qKIz{;  
           point_in = True 0v7;Z xD  
        Else 4_.k Q"'DH  
           point_in = False 3 n:<oOV  
        End If CJKH"'u3^  
    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 6$6NVq  
    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() 1UM]$$:i  
        '求得中心点坐标 *Ra")(RnDK  
    Dim tt As String iz^wBQ  
    Dim rt(3) As Single 78QFaN$  
        '判断是否平行 g?$9~/h :;  
       acx = p3x - p1x ONGe/CEXT  
       acy = p3y - p1y x b0+4w|  
       bdx = p4x - p2x =hs@W)-O  
       bdy = p4y - p2y =h_gj >  
       If acx * bdy = acy * bdx Then YqJIp. Z  
          rt(0) = 0 %|,<\~P  
          Exit Function <@vE 3v;  
       Else \QMSka>  
          '判断斜率存在否 0&nF Vsz  
          If p1x = p3x And p2x <> p4x Then UUU^YT \  
             tt = "ac_n_bd_y"  yY| .  
          ElseIf p1x <> p3x And p2x = p4x Then o7T|w~F~R  
             tt = "ac_y_bd_n" V[xy9L[#  
          ElseIf p1x <> p3x And p2x <> p4x Then /* O,T  
             tt = "ac_y_bd_y" !>:tF,fcB  
          End If .-|O"H$  
        Select Case tt a,4g`?  
             Case "ac_n_bd_y" Ur-^X(nL  
                'bd线段方程 V0AX1?H~w  
                k_bd = bdy / bdx m5p~>]}fYF  
                b_bd = p2y - k_bd * p2x eLYFd,?9  
                p_x = p1x *=7[Ip< X  
                p_y = k_bd * p_x + b_bd %xfy\of+Nk  
             Case "ac_y_bd_n" `?@7 KEl>  
                'ac线段方程 W^N"y &  
                k_ac = acy / acx piG1&*  
                b_ac = p1y - k_ac * p1x <M7* N .  
                p_x = p2x `l+SJLyJ%  
                p_y = k_ac * p_x + b_ac 0 \#Q;Z2  
            Case "ac_y_bd_y" z )pV$  
               'ac,bd线段都要求 "XY?v8*c  
               k_ac = acy / acx 9>#|~P&FE  
               b_ac = p1y - k_ac * p1x |i`@!NrFL  
               k_bd = bdy / bdx _Nn!SE   
               b_bd = p2y - k_bd * p2x 84[^#ke  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) *YtNt5u  
               p_y = k_ac * p_x + b_ac uf^:3{1  
            End Select DsX>xzM  
          rt(1) = p_x }m H>lN  
          rt(2) = p_y YzZF^q^I  
         oSl>%}  
    '计算最大半径 cMl%)j-  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) jyGVbno`  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) t4IJ%#22  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) x]ti3?w  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 6\3k0z  
    Dim bb(5) As Single 4cQ5E9  
      bb(1) = rr1 QB[s8"S  
      bb(2) = rr2 9^ r  
      bb(3) = rr3 Ng"vBycy  
      bb(4) = rr4 &XsLp&Do2  
      nb = rr1 QVW6SY  
    For i = 1 To 4 ^PQV3\N  
        If nb <= bb(i) Then #FB>}:L{h*  
           nb = bb(i) W\,lII0  
        End If 0'hxw3#  
    Next i ^JtHTLHL=  
        rt(0) = Sqr(nb) s.sy7%{  
        rr = rt() XX-T",  
      End If ]uvbQ.l_t  
             #'x?) AS  
    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)  ws2 j:B  
    a-A+.7  
    有热压工艺方面的人才或者资料分享下; D2%G.z  
    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 qVD!/;l  
    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.