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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: %/^k r ZD  
    OfR\8hAY  
    =h083|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: m-SP#?3  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) %HRFH  
    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 -zeodv7  
    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 doCWJ   
    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: =5P_xQx  
    1.判断点在区域中函数 ." m6zq  
    2.计算夹角函数 67I6]3[ Z  
    3.转置函数 u_aln[oIv  
    4.得到区域中心点,及区域半径函数 (% fl  
    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) o:\RJig<  
    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 $'f<4  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single (~oUd 4  
       cax = x2 - x1 -aiQp@^/J  
       cay = y2 - y1 n:?fv=9n  
       cbx = x2 - x3 j+3~  
       cby = y2 - y3 \lKiUy/  
       mo_jj = cax * cbx + cay * cby a;Ic!:L  
       mo_ca = Sqr(cax * cax + cay * cay) /Yk2 |L  
       mo_cb = Sqr(cbx * cbx + cby * cby) IMY?L  
       cos_acb = mo_jj / (mo_ca * mo_cb) %$j)?e  
       'ff_cos = cos_acb .>0e?A4,5?  
       If cos_acb >= 1 Then -ob_]CKtJ~  
       nn = 0 s-eC')w~E  
       ElseIf cos_acb <= -1 Then LxkToO{  
       nn = 3.14159265258979 d\`A ^  
       Else %S8e:kc6  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1)  :GC <U|p  
       End If 8T'=lTJ  
       'ff_angle = nn N2_j[Pe  
       ff_angle = nn * 180 / 3.14159265258979 W[o~AbU  
    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 OpY2Z7_  
    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'  
    Dim aob, boc, cod, doa, sum As Single (LPMEQhI:  
      If ppx = p1x And ppy = p1y Then -zg,pK$+  
         point_in = True 1)u 3  
         Exit Function 2O {@W +Mt  
      End If KyW6[WA9  
      If ppx = p2x And ppy = p2y Then FG7}MUu  
         point_in = True ?eT^gWX  
         Exit Function /-<S FT`  
      End If `G\uTCpk  
       If ppx = p3x And ppy = p3y Then nBL7LocvR  
         point_in = True |")}p=   
         Exit Function i8I%}8  
      End If I#Ay)+D  
          IpY  R  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) KotJ,s]B  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) m;{_%oQ;  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Nm%&xm  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) *52*IRH  
        sum = aob + boc + cod + doa I!.o& dk  
        If 360.01 > sum And sum > 359.99 Then ,FX;-nP%  
           point_in = True $b\`N2J-_  
        Else `CW8Wj  
           point_in = False PJN TIa  
        End If bp2l%A;  
    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 :kqJ~  
    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() npg.*I/>  
        '求得中心点坐标 $6h:j#{JE  
    Dim tt As String -_.)~ )P  
    Dim rt(3) As Single /ZZo`   
        '判断是否平行 kVw5z3]Xg  
       acx = p3x - p1x XodA(73`i  
       acy = p3y - p1y ed4:r/Dpo  
       bdx = p4x - p2x `w6\II)aB  
       bdy = p4y - p2y =v=a:e  
       If acx * bdy = acy * bdx Then ;oV dkp  
          rt(0) = 0 Ojq>4=Z\  
          Exit Function m v%fX2.  
       Else Qn(e[ C6\  
          '判断斜率存在否 EsXCi2]1  
          If p1x = p3x And p2x <> p4x Then -EFtk\/  
             tt = "ac_n_bd_y" \%=\_"^?  
          ElseIf p1x <> p3x And p2x = p4x Then MPA<?  
             tt = "ac_y_bd_n"  Ek(. ["  
          ElseIf p1x <> p3x And p2x <> p4x Then :}TT1@  
             tt = "ac_y_bd_y" bgGd  
          End If $[5ihV$u  
        Select Case tt KOGbC`TN<  
             Case "ac_n_bd_y" {NXc<0a(  
                'bd线段方程 "DM $FRI0  
                k_bd = bdy / bdx &Qy_= -]  
                b_bd = p2y - k_bd * p2x 5Tluxt71  
                p_x = p1x k'}}eu/ q  
                p_y = k_bd * p_x + b_bd r^-3( 77n  
             Case "ac_y_bd_n" aiGT!2  
                'ac线段方程 ~"!F&  
                k_ac = acy / acx mb~w .~%  
                b_ac = p1y - k_ac * p1x Oyhl*`-*t  
                p_x = p2x Sx+.<]t2A  
                p_y = k_ac * p_x + b_ac :.f =>s]  
            Case "ac_y_bd_y" OaRtGJnR  
               'ac,bd线段都要求 P!'Sx;C^f  
               k_ac = acy / acx 5WgdgDb@L  
               b_ac = p1y - k_ac * p1x ug0[*#|Y  
               k_bd = bdy / bdx LF* 7;a  
               b_bd = p2y - k_bd * p2x R<lj$_72Q  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) ]h~=lItTRZ  
               p_y = k_ac * p_x + b_ac >3s9vdUp4h  
            End Select {uh]b (}s)  
          rt(1) = p_x (p26TN;*$5  
          rt(2) = p_y +"6_rbeuO  
         7lY&/-V  
    '计算最大半径 A>(m}P  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 7)S`AQ2:)  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) d$8rzd  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) \Xc6K!HJM  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 2;r(?ebw  
    Dim bb(5) As Single K/79Tb-  
      bb(1) = rr1 1i4KZ"A5+  
      bb(2) = rr2 sy+1xnz  
      bb(3) = rr3 Q\&FuU  
      bb(4) = rr4 ]S<eO6z  
      nb = rr1 Brr{iBz*"  
    For i = 1 To 4 ZXljCiNn+\  
        If nb <= bb(i) Then ^%-$8sV  
           nb = bb(i) U(]a(k<r  
        End If G$ XvxJ  
    Next i SLpB$puS  
        rt(0) = Sqr(nb) ~Tq `c  
        rr = rt() 1O*5>dkX;%  
      End If yjvzA|(YC  
             >'wl)j$  
    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)  &QO~p3M  
    RFd.L@-]  
    有热压工艺方面的人才或者资料分享下; . [DCL  
    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 O 4@sN=o  
    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.