[分享]绝对随机网点分布（excel之vba） [复制链接]

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的模具，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： :+G1=TuXw~  
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描述:请输入描述

图片:2.jpg

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关键点说几个： sn4wd:b7%  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） )YB@6TiD  
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+zME   
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 e-FI+7  

以下是几个重要的函数： ^F>C|FJ2  
1.判断点在区域中函数 ot"3 3I  
2.计算夹角函数 +zU[rhMk'  
3.转置函数 K>"]*#aBv  
4.得到区域中心点，及区域半径函数 OwdA6it^f  
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） l(o#N'!j4  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 X9J&OQ  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 9^DXw!  
   cax = x2 - x1 Kzj9!'0R  
   cay = y2 - y1 )L)jv
Cw,e  
   cbx = x2 - x3 {Qe7/ln!  
   cby = y2 - y3 gPo3jwo$  
   mo_jj = cax * cbx + cay * cby j9V*f HK  
   mo_ca = Sqr(cax * cax + cay * cay) R-L*N$@!  
   mo_cb = Sqr(cbx * cbx + cby * cby) jkzC^aG  
   cos_acb = mo_jj / (mo_ca * mo_cb) 8PR1RCJ  
   'ff_cos = cos_acb s+EJXoxw  
   If cos_acb >= 1 Then :`pgdn  
   nn = 0 8lI'[Y?3.  
   ElseIf cos_acb <= -1 Then jD`p;#~8  
   nn = 3.14159265258979 "kS(b4^  
   Else $CgJ+ua\8  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) {^Y0kvnd  
   End If -f{NVX\<0  
   'ff_angle = nn 'aW}&!H M  
   ff_angle = nn * 180 / 3.14159265258979 4axc05  
End Function

'判断点在区域内函数 /^m3?q[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 3I" <\M4x  
Dim aob, boc, cod, doa, sum As Single hC nqe  
  If ppx = p1x And ppy = p1y Then <0P7NC:Ci  
     point_in = True &fyT}MA  
     Exit Function |uT&M`7\{  
  End If BEm~o#D  
  If ppx = p2x And ppy = p2y Then 
R*DQm  
     point_in = True @CxXkR  
     Exit Function =:4vRq
[  
  End If #dd-rooQuD  
   If ppx = p3x And ppy = p3y Then ZRK1UpP
 
     point_in = True KMhEU**  
     Exit Function FL,av>mV  
  End If {<p-/|Z52  
     Sh]g]xR  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 2I!L+j_  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Tej&1'G  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 6F@2:]W  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) SEL7,8 Hm  
    sum = aob + boc + cod + doa pE^jUxk6  
    If 360.01 > sum And sum > 359.99 Then |x Nd^  
       point_in = True ThvVLK  
    Else aDae0$lc.S  
       point_in = False ,.g9HO/R1  
    End If 9rCvnP=  
End Function

'得到点半径,得到交点坐标函数 *1>zE>
nlP  
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() X-Q;4M-CJ  
    '求得中心点坐标 ,o_Ur.UJ  
Dim tt As String ]h`<E~  
Dim rt(3) As Single 9uRs@]i  
    '判断是否平行 ToNRY<!  
   acx = p3x - p1x J4xJGO  
   acy = p3y - p1y IIrXI8'}  
   bdx = p4x - p2x }+" N '  
   bdy = p4y - p2y nj@l5[  
   If acx * bdy = acy * bdx Then ?9?eA^X%  
      rt(0) = 0 R24ZjbKL  
      Exit Function ]rhxB4*1  
   Else }IRx$cKV  
      '判断斜率存在否 $;ssW"7~Qn  
      If p1x = p3x And p2x <> p4x Then 4Y=sTXbFt  
         tt = "ac_n_bd_y" 7Lv5@  
      ElseIf p1x <> p3x And p2x = p4x Then l5}b.B^w  
         tt = "ac_y_bd_n" %U4w@jp  
      ElseIf p1x <> p3x And p2x <> p4x Then hlgBx~S[  
         tt = "ac_y_bd_y" &>0ape  
      End If T9N&Nh7 3  
    Select Case tt [T5z}!_y  
         Case "ac_n_bd_y" RgPY,\_9+  
            'bd线段方程 n1Y3b~E?E  
            k_bd = bdy / bdx T\Zq/Z\  
            b_bd = p2y - k_bd * p2x y'a(>s(  
            p_x = p1x @ k`^Z5tN  
            p_y = k_bd * p_x + b_bd Ke_&dgsq  
         Case "ac_y_bd_n" H"_]Hq  
            'ac线段方程 &)
8-iO  
            k_ac = acy / acx Q]?Lg  
            b_ac = p1y - k_ac * p1x $c WO`\XM  
            p_x = p2x #kuk3}&  
            p_y = k_ac * p_x + b_ac XyS|7#o  
        Case "ac_y_bd_y" * MJl(  
           'ac，bd线段都要求 kH)JBx.  
           k_ac = acy / acx ~HR/FGe?N  
           b_ac = p1y - k_ac * p1x }-e  
           k_bd = bdy / bdx HfF4BQxm  
           b_bd = p2y - k_bd * p2x kRyt|ryWh  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) y[}O(  
           p_y = k_ac * p_x + b_ac Ix"hl0Kh  
        End Select 8@S5P$b};  
      rt(1) = p_x .Fz5K&E=  
      rt(2) = p_y 4/Vy@h"A3  
     w84 ]s%y  
'计算最大半径 A ko}v"d  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) )"&$.bWn  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) qlUw;{;p  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Vs)%*1><  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) S[J=d%(  
Dim bb(5) As Single +Rtz`V1d  
  bb(1) = rr1 cI5*`LML1  
  bb(2) = rr2 j'?^<4i  
  bb(3) = rr3 bi
fi02  
  bb(4) = rr4 sH^?v0^
a  
  nb = rr1 $J~~.PUXQ  
For i = 1 To 4 pvz*(u
 
    If nb <= bb(i) Then .>(?c92  
       nb = bb(i) '.@'^80iQ  
    End If u%^Lu.l_c  
Next i $Qm-p?f  
    rt(0) = Sqr(nb) :qx>P_&y}z  
    rr = rt() !f(aWrw7e6  
  End If LE15y>  
         E0nR Vg  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  n4%|F'ma  

BRP9j y  
有热压工艺方面的人才或者资料分享下； 9&}`.Py  
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 T0WB  

高手真多！

楼主威武霸气.