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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: gi]ZG  
    TJaeQqob  
    t)N;'v  &  
     
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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: 0 mexF@  
    1.区域是由点围成的,所以EXCEL中需要定义点的坐标(区域) 7>i2OBkAhB  
    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 9<s4yZF@x  
    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 ~p*1:ij  
    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: $h28(K%  
    1.判断点在区域中函数 xx8U$,Ng  
    2.计算夹角函数 UG2w 1xqHw  
    3.转置函数 N4UM82N  
    4.得到区域中心点,及区域半径函数 xh0xSqDM  
    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) eW8[I'v_&  
    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 HDIk9WC^  
    Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 4]&<?"LSK  
       cax = x2 - x1 I&]G   
       cay = y2 - y1 GAEO$e:  
       cbx = x2 - x3 H+Z SPHs  
       cby = y2 - y3 >q7 %UK]&  
       mo_jj = cax * cbx + cay * cby 9=+-QdX+0]  
       mo_ca = Sqr(cax * cax + cay * cay) rwqv V ^  
       mo_cb = Sqr(cbx * cbx + cby * cby) KN[d!}W:  
       cos_acb = mo_jj / (mo_ca * mo_cb) |4b)>8TL/  
       'ff_cos = cos_acb ?Zcj}e.r  
       If cos_acb >= 1 Then w+AuMc  
       nn = 0 #a9_~\s  
       ElseIf cos_acb <= -1 Then $v27]"]  
       nn = 3.14159265258979 3/goCg  
       Else k#)Ad*t  
       nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) &%F@O<:  
       End If rPiNv 30L  
       'ff_angle = nn Fhj8lVvk  
       ff_angle = nn * 180 / 3.14159265258979 O\beKBT;  
    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 t#~?{i@m  
    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 pGWA\}'  
    Dim aob, boc, cod, doa, sum As Single y] V1b{9p  
      If ppx = p1x And ppy = p1y Then $k 2)8#\  
         point_in = True ps1@d[n  
         Exit Function ,4@|1z{bfm  
      End If N:BL=} V  
      If ppx = p2x And ppy = p2y Then ,=%nw]:  
         point_in = True WjMRH+  
         Exit Function 79 Bg]~}Z  
      End If @LX6hm*}  
       If ppx = p3x And ppy = p3y Then UuJjO^t  
         point_in = True |X(2Zv^O  
         Exit Function @h?crJ6$  
      End If J !#Zi#8sF  
         Fi;VDK(V9  
        aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) T] | d 5E  
        boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 'fW#7W  
        cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) -q>^ALf|@>  
        doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) kDsIp=  
        sum = aob + boc + cod + doa h/ep`-YaH  
        If 360.01 > sum And sum > 359.99 Then .YcN S%  
           point_in = True M'5 'O;kn  
        Else l},NcPL`  
           point_in = False <$Yi]ty  
        End If Np,2j KF(  
    End Function
    离线safeng1122
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    只看该作者 5楼 发表于: 2013-04-08
    '得到点半径,得到交点坐标函数 -T_\f?V88  
    Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() =_d%=m  
        '求得中心点坐标 +"!aM?o  
    Dim tt As String CjZ2z%||=  
    Dim rt(3) As Single (4+1lOd  
        '判断是否平行 Q< *8<Oo4g  
       acx = p3x - p1x H~fdbR  
       acy = p3y - p1y M?@p N<|  
       bdx = p4x - p2x y\PxR708  
       bdy = p4y - p2y uHM@h{r  
       If acx * bdy = acy * bdx Then :7b-$fm  
          rt(0) = 0 :`W|h E^  
          Exit Function o$J6 ~dn  
       Else GESXc $E8  
          '判断斜率存在否 f(Hu {c5yV  
          If p1x = p3x And p2x <> p4x Then Fb_S&!  
             tt = "ac_n_bd_y" PZ OKrW  
          ElseIf p1x <> p3x And p2x = p4x Then "yh Pm  
             tt = "ac_y_bd_n" FC>d_=V  
          ElseIf p1x <> p3x And p2x <> p4x Then j6>tH"i  
             tt = "ac_y_bd_y" A WJWtUa  
          End If @.$MzPQQI  
        Select Case tt w6zB Vi  
             Case "ac_n_bd_y" CZ=0mWfF  
                'bd线段方程 G\~^&BAC  
                k_bd = bdy / bdx aG27%(@  
                b_bd = p2y - k_bd * p2x SkP[|g'56  
                p_x = p1x &RY)o^g[4  
                p_y = k_bd * p_x + b_bd R@`rT*lJ  
             Case "ac_y_bd_n" #Z9L_gDp  
                'ac线段方程 HeIS;gfUY  
                k_ac = acy / acx 8LrK94  
                b_ac = p1y - k_ac * p1x P_Uutn~  
                p_x = p2x ?2`$3[ET-  
                p_y = k_ac * p_x + b_ac ZK dh%8C  
            Case "ac_y_bd_y" ; B$ *)X9  
               'ac,bd线段都要求 &3DK^|Lq  
               k_ac = acy / acx dOXD{c  
               b_ac = p1y - k_ac * p1x TOT PzB  
               k_bd = bdy / bdx ~j& ?/{7I  
               b_bd = p2y - k_bd * p2x *\ECf .7jz  
               p_x = -(b_bd - b_ac) / (k_bd - k_ac) MCy~@)-IN  
               p_y = k_ac * p_x + b_ac <Dm Tj$  
            End Select +/cgw,  
          rt(1) = p_x ==9ZFdf  
          rt(2) = p_y L;)v&a7[P  
         =,:K)  
    '计算最大半径 Tg''1 Wl*  
       rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) X47!E |*  
       rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) i21QJ6jPcI  
       rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) rsxRk7s@  
       rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 8hB.fau  
    Dim bb(5) As Single u0]q`u/ T  
      bb(1) = rr1 qgexb\x\4  
      bb(2) = rr2 nCaLdj?  
      bb(3) = rr3 }$aNOf%:  
      bb(4) = rr4 7),*3c')  
      nb = rr1 c@OP5L>{  
    For i = 1 To 4 (%DRt4u <H  
        If nb <= bb(i) Then uPDaq ]A  
           nb = bb(i) Z_itu73I  
        End If aN'0} <s  
    Next i vttrKVA  
        rt(0) = Sqr(nb) S0xIvzS  
        rr = rt() 0yQe5i}  
      End If ? ( 12aU  
             !-(J-45  
    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)  2nYiG)tg  
    GdL4|xv  
    有热压工艺方面的人才或者资料分享下; @Zh8 QI+  
    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 Q.uR<C6)v  
    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.