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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: 4w6K|v<X  
    c]r|I %D  
    5mNXWg7#]  
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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: TkoXzG8yE<  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) Nt-SCLDM  
    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 kw:D~E (  
    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 \87J~K'  
    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: cgXF|'yI&l  
    1.判断点在区域中函数 MH;%Y"EI  
    2.计算夹角函数 ?67I|@^  
    3.转置函数 )9*3^v  
    4.得到区域中心点,及区域半径函数 %N>NOk)  
    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) PZ(<eJ>  
    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 y2$;t'  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single `h9)`*  
       cax = x2 - x1 ]z=Vc#+!  
       cay = y2 - y1 r82o[+$u0K  
       cbx = x2 - x3 niHL/\7u  
       cby = y2 - y3 &:CjUaP@  
       mo_jj = cax * cbx + cay * cby <I%9O:R  
       mo_ca = Sqr(cax * cax + cay * cay) e_c;D2' F  
       mo_cb = Sqr(cbx * cbx + cby * cby) G6 8Nv:  
       cos_acb = mo_jj / (mo_ca * mo_cb) .e2A*9,  
       'ff_cos = cos_acb 1uS-Tx  
       If cos_acb >= 1 Then zL},`:(.  
       nn = 0 /3[ 9{r  
       ElseIf cos_acb <= -1 Then M 1^C8cz  
       nn = 3.14159265258979 51M^yG&M  
       Else 1: xnD  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) <VaMUm<2  
       End If )ClMw!ZrU  
       'ff_angle = nn "8muMa8Q%  
       ff_angle = nn * 180 / 3.14159265258979 5nx<,-N*BP  
    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 IjDT'p_  
    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 1n`1o-&l-  
    Dim aob, boc, cod, doa, sum As Single 5{FM#@  
      If ppx = p1x And ppy = p1y Then uPFHlT  
         point_in = True .b#9q6F-/  
         Exit Function PNJe&q0*  
      End If -H4+ur JJ  
      If ppx = p2x And ppy = p2y Then XW?ybH6  
         point_in = True :G`L3E&1s  
         Exit Function >I d!I  
      End If MKe^_uF  
       If ppx = p3x And ppy = p3y Then k%l_N)38  
         point_in = True e$Bf[F#;-  
         Exit Function 2>$F0 M  
      End If Dr6s ^}}~n  
         F:;!) H*  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y)  L%WME8PB  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) z9M.e.  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Vm~qk  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) w#xeua|*I#  
        sum = aob + boc + cod + doa f]ue#O  
        If 360.01 > sum And sum > 359.99 Then !{Q:(B#ec  
           point_in = True zkh hN"bX  
        Else &"[)s[m+t  
           point_in = False U=kx`j>  
        End If 3^\?>C7  
    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 D<U 9m3  
    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() SyK9Is{8  
        '求得中心点坐标 Vd+td;9(  
    Dim tt As String 38c?^  
    Dim rt(3) As Single ZfPd0 p  
        '判断是否平行 9u,8q:I.?  
       acx = p3x - p1x |h&<_9  
       acy = p3y - p1y (j' {~FB  
       bdx = p4x - p2x <S1??  
       bdy = p4y - p2y D|d4:;7  
       If acx * bdy = acy * bdx Then 7]Al*)  
          rt(0) = 0 l{Jt sI  
          Exit Function ]~-*hOcQ4  
       Else  nbI= r+  
          '判断斜率存在否 ,~4H{{<j  
          If p1x = p3x And p2x <> p4x Then n /QfdAg  
             tt = "ac_n_bd_y" Y1{B c<tC  
          ElseIf p1x <> p3x And p2x = p4x Then ]^=|Zd-  
             tt = "ac_y_bd_n"  i"vawxm  
          ElseIf p1x <> p3x And p2x <> p4x Then QsiJ%O Q  
             tt = "ac_y_bd_y" ugYw <  
          End If X8/Tl \c  
        Select Case tt wV\%R,bZj  
             Case "ac_n_bd_y" w *50ZS;N  
                'bd线段方程 55.;+B5L *  
                k_bd = bdy / bdx VFv9Q2/.  
                b_bd = p2y - k_bd * p2x ZJ;LD*  
                p_x = p1x R7K!A %  
                p_y = k_bd * p_x + b_bd xS'zZ%?  
             Case "ac_y_bd_n" \6sqyWI %  
                'ac线段方程 k$h [8l( <  
                k_ac = acy / acx 2-++i:, g  
                b_ac = p1y - k_ac * p1x aG%kmS&fv  
                p_x = p2x 6*IpAIh  
                p_y = k_ac * p_x + b_ac Z@3l%p6V  
            Case "ac_y_bd_y" [,=d7*b(l  
               'ac,bd线段都要求 6*u,c^a  
               k_ac = acy / acx 9)+@0fG)  
               b_ac = p1y - k_ac * p1x 4qhWm"&CM  
               k_bd = bdy / bdx ) Qq'Wp3i  
               b_bd = p2y - k_bd * p2x y&"!m }  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) g\U/&.}DN  
               p_y = k_ac * p_x + b_ac V/PAi.GZ  
            End Select [*8Y'KX <  
          rt(1) = p_x IdPn%)>6  
          rt(2) = p_y }j46L1T  
         o0ZIsrr  
    '计算最大半径 -ynBi;nH  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) %}q .cV  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) %KtU1A(["  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) B0d%c&N${  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) xjo;kx\y^  
    Dim bb(5) As Single B^fT>1P  
      bb(1) = rr1 O:Va&Cyj*  
      bb(2) = rr2 @%1IkvJV  
      bb(3) = rr3 ;QBh;jg4  
      bb(4) = rr4 KOey8tB)1  
      nb = rr1 zB*euHIqZ  
    For i = 1 To 4 c%z'xM  
        If nb <= bb(i) Then vJ"i.:Gf4  
           nb = bb(i) )%mg(O8uL  
        End If hQRL,?  
    Next i /b5>Qp  
        rt(0) = Sqr(nb) OfTfNhpK  
        rr = rt() FJeiY#us  
      End If ;I}'}  
             }7ehF6  
    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)  wE]K~y!`  
    s{0aBeq  
    有热压工艺方面的人才或者资料分享下; A A^{B  
    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 (wRgus  
    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.