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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: jg~_'4f#  
    :fxWz%t  
    ?Wwh _TO  
     
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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: Oz :D.V 3~  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) BRe{1i 6  
    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 F vj{@B!  
    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 O'fk&&l  
    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: Te+^J8  
    1.判断点在区域中函数 K${}r0   
    2.计算夹角函数 JfkTw~'R  
    3.转置函数 =:4?>2)  
    4.得到区域中心点,及区域半径函数 Khj=llo,  
    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) 3)y{n%3L  
    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 +lKrj\Xj  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single X($6IL6m  
       cax = x2 - x1 ;,dkJ7M  
       cay = y2 - y1 M\ dO({o  
       cbx = x2 - x3 b~j~  
       cby = y2 - y3 l&3ki!  
       mo_jj = cax * cbx + cay * cby dhW<p 5  
       mo_ca = Sqr(cax * cax + cay * cay) -1CEr_(P^  
       mo_cb = Sqr(cbx * cbx + cby * cby) *="m3:c'J  
       cos_acb = mo_jj / (mo_ca * mo_cb) @89I#t6A.  
       'ff_cos = cos_acb {S *!B  
       If cos_acb >= 1 Then izf~w^/  
       nn = 0 -AC`q/bCD  
       ElseIf cos_acb <= -1 Then a1|c2kT  
       nn = 3.14159265258979 UQ~4c,  
       Else 7b46t2W<  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) b_l3+'#ofM  
       End If ]H+{eJB7O  
       'ff_angle = nn 5z~\5x  
       ff_angle = nn * 180 / 3.14159265258979 Px#$uU  
    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 Qci$YTwl>  
    Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean 13a(FG  
    Dim aob, boc, cod, doa, sum As Single VgMP^&/gZ  
      If ppx = p1x And ppy = p1y Then q{E"pyt36R  
         point_in = True PrSkHxm  
         Exit Function 4P%m>[   
      End If xnbsg!`;7W  
      If ppx = p2x And ppy = p2y Then @rwU 1T33  
         point_in = True DjwQ`MA  
         Exit Function {6O0.}q]&  
      End If !)c=1EX]"  
       If ppx = p3x And ppy = p3y Then }lP5 GT2  
         point_in = True Obo_YE  
         Exit Function ErDL^M-`  
      End If X V=S )  
         O R #7"  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) (ua q<Cvg  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) hH`Jb7 7L  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) k|FSz#Y  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 62kb2C  
        sum = aob + boc + cod + doa {155b0  
        If 360.01 > sum And sum > 359.99 Then e g3L:rk_  
           point_in = True WeC(w+}p  
        Else \zu }\{  
           point_in = False iYKU[UP?  
        End If p)3nyN=|_  
    End Function
    离线safeng1122
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    只看该作者 5楼 发表于: 2013-04-08
    '得到点半径,得到交点坐标函数 %0XvJF)s  
    Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() /IR#A%U  
        '求得中心点坐标 6GINmkA  
    Dim tt As String `,Orf ZMb  
    Dim rt(3) As Single .Yx_:h=u  
        '判断是否平行 kNPDm6m  
       acx = p3x - p1x S~3\3qt$  
       acy = p3y - p1y ]sj0~DI*m  
       bdx = p4x - p2x V1<`%=%_W  
       bdy = p4y - p2y X:=c5*0e  
       If acx * bdy = acy * bdx Then BQjGv?p0s  
          rt(0) = 0 9.&mz}q  
          Exit Function 6G_<2bO  
       Else 2z\;Q8g){r  
          '判断斜率存在否 G7-!`-Nk  
          If p1x = p3x And p2x <> p4x Then ?)i1b\4Go  
             tt = "ac_n_bd_y" iiNSDc  
          ElseIf p1x <> p3x And p2x = p4x Then Eg8i _s~:  
             tt = "ac_y_bd_n" \##5O7/1  
          ElseIf p1x <> p3x And p2x <> p4x Then eVt1d2.O  
             tt = "ac_y_bd_y" !wh&>3~  
          End If 5=Lq=,K$  
        Select Case tt q;A;H)?g  
             Case "ac_n_bd_y" V'StvU  
                'bd线段方程 _x %1F  
                k_bd = bdy / bdx ]b}B2F'n  
                b_bd = p2y - k_bd * p2x 4| Ui?.4=  
                p_x = p1x 8;n_TMb  
                p_y = k_bd * p_x + b_bd 7SS07$B  
             Case "ac_y_bd_n" *H2]H @QHN  
                'ac线段方程 Q"VMNvKYB  
                k_ac = acy / acx 3M<!?%v\A  
                b_ac = p1y - k_ac * p1x W3JF5*  
                p_x = p2x h-mTj3p-K  
                p_y = k_ac * p_x + b_ac &Lt@} 7$8  
            Case "ac_y_bd_y" \:&@;!a  
               'ac,bd线段都要求 l\Xd.H" j,  
               k_ac = acy / acx J(iV0LAZb  
               b_ac = p1y - k_ac * p1x g7V_ [R(6  
               k_bd = bdy / bdx p;%<mUI  
               b_bd = p2y - k_bd * p2x 6 hiC?2b{x  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) {a "RXa  
               p_y = k_ac * p_x + b_ac |_zO_Frtp  
            End Select ;BBpN`T  
          rt(1) = p_x @8gEH+r  
          rt(2) = p_y ^:cRp9l"7  
         }5bM1h#z  
    '计算最大半径 |~e?,[-2`r  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) w~+aW(2  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) OJ,m1{9$}  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) t9u|iTY f!  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 8MF2K6  
    Dim bb(5) As Single -s"0/)HD  
      bb(1) = rr1 ?<~WO?  
      bb(2) = rr2 b^Cfhy^RTq  
      bb(3) = rr3 n1J]p#nCa.  
      bb(4) = rr4 2`Gv5}LfyR  
      nb = rr1 NFyMY#\]  
    For i = 1 To 4 !OE*z $\  
        If nb <= bb(i) Then V4K'R2t  
           nb = bb(i) $>w/Cy  
        End If Y &f\VNlT  
    Next i HL8eD^  
        rt(0) = Sqr(nb) >.DC!QV  
        rr = rt() .v])S}K  
      End If 4hAJ!7[A.  
             S; /. %  
    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)  *dsX#Iz  
    "&o,yd%  
    有热压工艺方面的人才或者资料分享下; ~}ovuf=%  
    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 uh3) 0.nR  
    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.