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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: nn5S7!  
    hF!yp7l;  
    (w@|:0t^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: F1gDeLmJ  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) CM8WI~  
    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 +oe ~j\=  
    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 KiH#*u 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: |oPqX %?  
    1.判断点在区域中函数 g 9>p?XY  
    2.计算夹角函数 (Q#ArMMORI  
    3.转置函数 $(#o)r>_R  
    4.得到区域中心点,及区域半径函数 uh`~K6&*\w  
    5.再有就是若干个点抽取其中一部分;或者采用随机分布(该方法会有重合点,所以没采用) 1QjrL@$>15  
    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 1[u{3lQ  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single \'BKI;  
       cax = x2 - x1 (J$JIPF  
       cay = y2 - y1 }yS"C fM  
       cbx = x2 - x3 ^=.|\ YM  
       cby = y2 - y3 kZPj{^c:  
       mo_jj = cax * cbx + cay * cby lt5~rH2  
       mo_ca = Sqr(cax * cax + cay * cay) k&yy_r   
       mo_cb = Sqr(cbx * cbx + cby * cby) 9bqfZ"6nXY  
       cos_acb = mo_jj / (mo_ca * mo_cb) >d#B149  
       'ff_cos = cos_acb |~#!e}L(  
       If cos_acb >= 1 Then pd>EUdbrp&  
       nn = 0 78y4nRQ*  
       ElseIf cos_acb <= -1 Then [<8<+lH=P  
       nn = 3.14159265258979 1B,RRHXn6  
       Else !\+SE"ml  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Vk{0)W7  
       End If NVJvCs)3f  
       'ff_angle = nn 0y2iS' t  
       ff_angle = nn * 180 / 3.14159265258979 2$\Du9+  
    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  =Lp0i9c  
    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 VGq2ITg9eE  
    Dim aob, boc, cod, doa, sum As Single vTP'\^;  
      If ppx = p1x And ppy = p1y Then RHVMlMX  
         point_in = True rs 7R5 F  
         Exit Function sE-"TNONZ  
      End If &ATjDbW*(  
      If ppx = p2x And ppy = p2y Then wzP>Cq  
         point_in = True 0'RSl~QvqS  
         Exit Function o5 . q  
      End If *hFT,1WE=+  
       If ppx = p3x And ppy = p3y Then 1w1(FpQO.  
         point_in = True oy/#,R_n%  
         Exit Function  Ur]5AJ  
      End If )jCAfdnCs  
         ~(4cnD)BO  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) iMJjWkk  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 'OkF.bs  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 80axsU^H0  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 0u)]1  
        sum = aob + boc + cod + doa Y~fds#y0  
        If 360.01 > sum And sum > 359.99 Then @ ;rU#  
           point_in = True a?\ Au  
        Else e @=Bl-  
           point_in = False ^ 8egn|  
        End If 8 :Z3Q  
    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 / u>")f  
    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() p>65(&N,  
        '求得中心点坐标 C+*: lLY  
    Dim tt As String Ol D]*=.cO  
    Dim rt(3) As Single @<AyCaU`.  
        '判断是否平行 W[w8@OCNf  
       acx = p3x - p1x ^5j9WV  
       acy = p3y - p1y fZT=q^26  
       bdx = p4x - p2x F0+u#/#  
       bdy = p4y - p2y >$?$&+e}  
       If acx * bdy = acy * bdx Then fh}\#WE"  
          rt(0) = 0 ZIkXy*<(  
          Exit Function 6'+3""\  
       Else yH@W6'.  
          '判断斜率存在否 "P"~/<:)  
          If p1x = p3x And p2x <> p4x Then |f?tyQ  
             tt = "ac_n_bd_y" X0Xs"--}  
          ElseIf p1x <> p3x And p2x = p4x Then "*XR'9~7  
             tt = "ac_y_bd_n" e ST8>r  
          ElseIf p1x <> p3x And p2x <> p4x Then zF3fpEKe  
             tt = "ac_y_bd_y" >&Y8VLcK  
          End If Rco#?'  
        Select Case tt g}P.ksM  
             Case "ac_n_bd_y" N[ z7<$$  
                'bd线段方程 !1w=_  
                k_bd = bdy / bdx [|Jz s[  
                b_bd = p2y - k_bd * p2x #3\F<AJ<VB  
                p_x = p1x *:aJlvk  
                p_y = k_bd * p_x + b_bd '@ (WT~g  
             Case "ac_y_bd_n" AEe*A+  
                'ac线段方程 G>d@lt  
                k_ac = acy / acx ]B5qv6  
                b_ac = p1y - k_ac * p1x +8v^J8q0  
                p_x = p2x AQQeLdTq  
                p_y = k_ac * p_x + b_ac +tES:3Pi  
            Case "ac_y_bd_y" jf~/x>Q  
               'ac,bd线段都要求 ^ejU=0+cN  
               k_ac = acy / acx 3a"4Fn  
               b_ac = p1y - k_ac * p1x 7rbl+:y2  
               k_bd = bdy / bdx E[)`+:G]  
               b_bd = p2y - k_bd * p2x q} U^H  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) BXnSkT7  
               p_y = k_ac * p_x + b_ac aS-rRL|\L  
            End Select gH(,>}{^K  
          rt(1) = p_x t+|c)"\5h  
          rt(2) = p_y [wj&.I{^s  
         B9&"/tT  
    '计算最大半径 "z1\I\ ^  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) gp$oQh#37;  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) @M?;~M?B]J  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) WIa4!\Ky!  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ^Z$%OM,  
    Dim bb(5) As Single )k.;.7dXe  
      bb(1) = rr1 OjCTTz  
      bb(2) = rr2 j[.R|I|  
      bb(3) = rr3 V{HP8f91  
      bb(4) = rr4 2$V]XSe  
      nb = rr1 n? e&I>1W  
    For i = 1 To 4 WSz#g2a  
        If nb <= bb(i) Then Cb%?s  
           nb = bb(i) 9r+]V=  
        End If "W?<BpV~@!  
    Next i GKTrf\"c  
        rt(0) = Sqr(nb) [nZ3}o  
        rr = rt() T<=Ci?C v  
      End If F3HpDfy  
             NldeD2~H  
    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)  AT*J '37  
    |&!04~s;E  
    有热压工艺方面的人才或者资料分享下; |-t>_+. J'  
    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 @ )nxX))a  
    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.