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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: L+0N@`nRF  
    CsST-qxg  
    tB(X`A.|  
     
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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: &MGgO\|6  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) O 9 Au =  
    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 o'}Z!@h  
    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 QX~72X=(  
    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: ojs/yjvx  
    1.判断点在区域中函数 %KVRiX  
    2.计算夹角函数 vH\nL>r  
    3.转置函数 @m d^mss  
    4.得到区域中心点,及区域半径函数 $/(/v?3][e  
    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) _f2iz4  
    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 oM7-1O  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single g<jK^\e W  
       cax = x2 - x1 f2K3*}P  
       cay = y2 - y1 vP;tgW9Qk  
       cbx = x2 - x3 k5\ zGsol  
       cby = y2 - y3 s5|)4Z ac  
       mo_jj = cax * cbx + cay * cby 9Yne=R/]  
       mo_ca = Sqr(cax * cax + cay * cay) 7.'j~hJL  
       mo_cb = Sqr(cbx * cbx + cby * cby) ) W7H{#  
       cos_acb = mo_jj / (mo_ca * mo_cb) .TU15AAc  
       'ff_cos = cos_acb 6*oTT(0<p  
       If cos_acb >= 1 Then 0 #; s{7k  
       nn = 0 $f-pLF+x  
       ElseIf cos_acb <= -1 Then N@ tb^M  
       nn = 3.14159265258979 <}>-ip?  
       Else  ^*>no=A  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) lk'jBl%  
       End If -BH'.9uqGQ  
       'ff_angle = nn X7!A(q+h  
       ff_angle = nn * 180 / 3.14159265258979 xGQ:7g+qu  
    End Function
    离线safeng1122
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    只看该作者 4楼 发表于: 2013-04-08
    '判断点在区域内函数 a.ME{:a%  
    Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean ;L{y3CWT  
    Dim aob, boc, cod, doa, sum As Single hRiGW_t  
      If ppx = p1x And ppy = p1y Then ITOGD  
         point_in = True N^>g= Ub  
         Exit Function N1+]3kt ~  
      End If )7TTRL  
      If ppx = p2x And ppy = p2y Then gC:E38u  
         point_in = True ^E8Hv  
         Exit Function Fsdn2{g8U  
      End If S!c@6&XJm?  
       If ppx = p3x And ppy = p3y Then dv>zK#!  
         point_in = True g7ROA8xu  
         Exit Function :\cJ vm  
      End If *gKr1}M  
         e6/} M3B  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) CF4y$aC#  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) @J)vuGS  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 4 df1)<}U-  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ?^0Z(<Arz  
        sum = aob + boc + cod + doa  HuC lO  
        If 360.01 > sum And sum > 359.99 Then A).AAr  
           point_in = True w/@%xy  
        Else cZ,_O~  
           point_in = False au v\fR :  
        End If 6ns_4, e  
    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 Fx\Re]~n  
    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() LdL\B0^l  
        '求得中心点坐标 DKH9 O  
    Dim tt As String .YlM'E*X  
    Dim rt(3) As Single .42OSV  
        '判断是否平行 5sUnEHN  
       acx = p3x - p1x =+WFx3/  
       acy = p3y - p1y %(6WrE5F6  
       bdx = p4x - p2x `VbG%y&I  
       bdy = p4y - p2y 19DW~kvYk  
       If acx * bdy = acy * bdx Then Ky|0IKE8Z  
          rt(0) = 0 $P~a   
          Exit Function ~>|U%3}]  
       Else + u+fEg/A  
          '判断斜率存在否 c9'b `#'  
          If p1x = p3x And p2x <> p4x Then }#M|3h;q9+  
             tt = "ac_n_bd_y" wz=I+IN:  
          ElseIf p1x <> p3x And p2x = p4x Then b/`' ?| C  
             tt = "ac_y_bd_n" 6P8X)3CE<T  
          ElseIf p1x <> p3x And p2x <> p4x Then )*B.y|b #  
             tt = "ac_y_bd_y" |d8o<Q  
          End If .nJGxz+X"  
        Select Case tt >XN&Q VE  
             Case "ac_n_bd_y" R!ij CF\  
                'bd线段方程 hGLBFe#3  
                k_bd = bdy / bdx ljRR  
                b_bd = p2y - k_bd * p2x :csLZqn[  
                p_x = p1x %,BJkNV  
                p_y = k_bd * p_x + b_bd K9iR>put  
             Case "ac_y_bd_n" 8?!Vr1x  
                'ac线段方程 W:G*t4i  
                k_ac = acy / acx #Bjnz$KB  
                b_ac = p1y - k_ac * p1x l0f6Lxfz  
                p_x = p2x #kA+Yqy \)  
                p_y = k_ac * p_x + b_ac t1S\M%?  
            Case "ac_y_bd_y" `7`iCYiTy  
               'ac,bd线段都要求 tee%E=P  
               k_ac = acy / acx ;pJ7k23(  
               b_ac = p1y - k_ac * p1x W=/B[@3'  
               k_bd = bdy / bdx ~?FKww|_*J  
               b_bd = p2y - k_bd * p2x 4T" P #)z  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) b~-9u5.L1  
               p_y = k_ac * p_x + b_ac Wk?XlCj  
            End Select ~rD* Y&#.  
          rt(1) = p_x Z3Y%VHB_F(  
          rt(2) = p_y *!r8HV/<  
         4U3T..wA  
    '计算最大半径 Fa8>+  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) OLq/OO,w  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ygHNAQG~  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) e5dwq  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) *KNR",.  
    Dim bb(5) As Single c8'?Dd  
      bb(1) = rr1 @U,cj>K  
      bb(2) = rr2 YAD9'h]d\  
      bb(3) = rr3 b.F2m(e2  
      bb(4) = rr4 iPao54Z  
      nb = rr1 lxbZM9A2  
    For i = 1 To 4 }0I! n@  
        If nb <= bb(i) Then z 'j%.Dd8  
           nb = bb(i) Rh39x-`Z  
        End If 0>vm&W<?)  
    Next i $%/Zm*H  
        rt(0) = Sqr(nb) C M(g4fh  
        rr = rt() ~dv C$   
      End If aDs[\ '  
             1cPi>?R:  
    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)  fAXF_wj  
    UkeX">  
    有热压工艺方面的人才或者资料分享下; VP5_Y1e7  
    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  T=9+  
    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.