[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： Le':b2o  
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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： =7Y gES  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） o ) FjWf;  
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 T6ZJSKM  
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 lC|{{?m  

以下是几个重要的函数： aUy=D:\  
1.判断点在区域中函数 PHa#;6!5  
2.计算夹角函数 B&m?3w  
3.转置函数 OQA3~\Vu  
4.得到区域中心点，及区域半径函数 BVC{Zq6hi  
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） VrokEK*qbY  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 }# -N7=h  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single f41!+W=  
   cax = x2 - x1 Hf %;FaJ=  
   cay = y2 - y1 " I@Z:[=2  
   cbx = x2 - x3 <!zItFMD[m  
   cby = y2 - y3 &T}v1c7)  
   mo_jj = cax * cbx + cay * cby "7)F";_(^  
   mo_ca = Sqr(cax * cax + cay * cay) 5.|rzk>  
   mo_cb = Sqr(cbx * cbx + cby * cby) 3@}HdLmN|  
   cos_acb = mo_jj / (mo_ca * mo_cb) l{Hi5x'H  
   'ff_cos = cos_acb U&Ay3/  
   If cos_acb >= 1 Then ^%d+nKx9nL  
   nn = 0 Vb 4Qt#o  
   ElseIf cos_acb <= -1 Then `>8|  
   nn = 3.14159265258979 ?k_=?m  
   Else -lMC{~h\(S  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 5H 1(C#|  
   End If ~9oS~fP?I  
   'ff_angle = nn ~|J6M  
   ff_angle = nn * 180 / 3.14159265258979 cp?`\P  
End Function

'判断点在区域内函数 2z[Pw0#V
 
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 Y\p
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Dim aob, boc, cod, doa, sum As Single :` ~b&Oz)  
  If ppx = p1x And ppy = p1y Then =,@SZsM*B  
     point_in = True J*U(f{Q(  
     Exit Function 7FDraEr#f  
  End If 1C$^S]v%a  
  If ppx = p2x And ppy = p2y Then KUyua~tF  
     point_in = True LOida#R  
     Exit Function yl'~H;su  
  End If 8:&@MZQ&!  
   If ppx = p3x And ppy = p3y Then 2CxdNj  
     point_in = True >uuX<\cW  
     Exit Function )%tf,3  
  End If z|b4w7I  
     7GP?;P  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Ew:JpMR  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) p[uwG31IL`  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) t'Q48QAb?  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) +u=xBhZ  
    sum = aob + boc + cod + doa r\3In-(AT  
    If 360.01 > sum And sum > 359.99 Then WJ.PPq>]F  
       point_in = True 7>ODaj   
    Else zWY6D4   
       point_in = False vl*RRoJ  
    End If W;-Qze\D  
End Function

'得到点半径,得到交点坐标函数 wM&G-~9ujk  
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() vv8$u3H  
    '求得中心点坐标 Z0'3.D,l  
Dim tt As String ~clWG-i  
Dim rt(3) As Single uo{QF5z]  
    '判断是否平行 OKU P  
   acx = p3x - p1x w}1)am&pD  
   acy = p3y - p1y 'RA[_Z  
   bdx = p4x - p2x ^4fkZh  
   bdy = p4y - p2y 2~@=ua[|=5  
   If acx * bdy = acy * bdx Then 4Ek< 5s[  
      rt(0) = 0 _xC~44  
      Exit Function foFn`?LF  
   Else o+t?OG/0  
      '判断斜率存在否 9e=*jRs]l^  
      If p1x = p3x And p2x <> p4x Then <7&b|f$CL  
         tt = "ac_n_bd_y" p>zE/Pw~  
      ElseIf p1x <> p3x And p2x = p4x Then ZV U9t  
         tt = "ac_y_bd_n" @<PL  
      ElseIf p1x <> p3x And p2x <> p4x Then vP?yl "U  
         tt = "ac_y_bd_y" bCrB'&^t  
      End If s=nds"J  
    Select Case tt Z kS*CG   
         Case "ac_n_bd_y" ;F+%{LgKl  
            'bd线段方程 :U*[s$  
            k_bd = bdy / bdx xn@jL;+<-  
            b_bd = p2y - k_bd * p2x J91`wA&r  
            p_x = p1x 5R Hs  
            p_y = k_bd * p_x + b_bd 4Klfnki  
         Case "ac_y_bd_n" r%#qbsN  
            'ac线段方程 F,zJdJ  
            k_ac = acy / acx /7#
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            b_ac = p1y - k_ac * p1x
JU@$(  
            p_x = p2x ;E&XFTdO  
            p_y = k_ac * p_x + b_ac 4 5lg&oO  
        Case "ac_y_bd_y" cm3Y!p{p"  
           'ac，bd线段都要求 +{
I\r|  
           k_ac = acy / acx L$xRn/\  
           b_ac = p1y - k_ac * p1x op*+fJHD  
           k_bd = bdy / bdx <H)@vW]_  
           b_bd = p2y - k_bd * p2x $!f$R`R^Q\  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) E)P1`X  
           p_y = k_ac * p_x + b_ac kC0!`$<2f)  
        End Select E;4a(o]{t  
      rt(1) = p_x O,{ (  
      rt(2) = p_y Wg%-m%7O  
     ' 7A7HDJ  
'计算最大半径 LJy'wl  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ]| yH8m  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ,2`d3u^CW  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) K)?^
b|D  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Vk (bU=w  
Dim bb(5) As Single 6&Dvp1`m  
  bb(1) = rr1 ,gvX
~k  
  bb(2) = rr2 <@A^C$g  
  bb(3) = rr3 2z\F m/Z.  
  bb(4) = rr4 s]iOC6v  
  nb = rr1 XbC8t &Q],  
For i = 1 To 4  M9K).P=  
    If nb <= bb(i) Then o^?{j*)g  
       nb = bb(i) YiTp-@$}  
    End If _iu|*h1y  
Next i WGmCQE[/c  
    rt(0) = Sqr(nb) mTfMuPPs[  
    rr = rt() ]SL&x:/-  
  End If =oME~oB~  
         arP+(1U  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  >|/? Up  

7G[ GHc>  
有热压工艺方面的人才或者资料分享下； mnQjX ?  
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 ~5 pC$SC6>  

高手真多！

楼主威武霸气.