[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： .qe+"$K'n  
mKTF@DED  

描述:请输入描述

图片:2.jpg

w!*ZS~v/r  

关键点说几个： 2ia&c@P-  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） .>,Y |  
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 g#fn(A  
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 D',7T=C   

以下是几个重要的函数： dj5|t~&  
1.判断点在区域中函数 F@z%y'5 Z*  
2.计算夹角函数 H!FaI(YZl  
3.转置函数 t?^!OJ:L  
4.得到区域中心点，及区域半径函数 5m@'( ]j  
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） 3J8>r|u;1'  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 rkh%[o9"/  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single F&CvqPI  
   cax = x2 - x1 kwww5p ["  
   cay = y2 - y1 '8R5Tl  
   cbx = x2 - x3 c9@3=6S/  
   cby = y2 - y3 WAuT`^"u  
   mo_jj = cax * cbx + cay * cby
2ER_?y  
   mo_ca = Sqr(cax * cax + cay * cay) rT-.'aQ2t  
   mo_cb = Sqr(cbx * cbx + cby * cby) 9 M?UPE  
   cos_acb = mo_jj / (mo_ca * mo_cb) ~[aV\r?  
   'ff_cos = cos_acb x~m$(LT  
   If cos_acb >= 1 Then :%28*fl  
   nn = 0 Gys-Im6>~@  
   ElseIf cos_acb <= -1 Then 7[L%j;)bw  
   nn = 3.14159265258979 f;+.j/ +  
   Else uARkf'  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) fMHw=wJQ  
   End If EHl~y=9  
   'ff_angle = nn WcXNc`x  
   ff_angle = nn * 180 / 3.14159265258979 5KTFf6Uq  
End Function

'判断点在区域内函数 QYj 4D  
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 a~!7A ZT-O  
Dim aob, boc, cod, doa, sum As Single !K=$Q Uq  
  If ppx = p1x And ppy = p1y Then SEu:31k{o  
     point_in = True C=K{;.  
     Exit Function )-iUUak  
  End If 1Qjc*+JzO.  
  If ppx = p2x And ppy = p2y Then " :[;}f;  
     point_in = True 3qV~C{S  
     Exit Function @QYCoEU8J  
  End If q+;lxR5D  
   If ppx = p3x And ppy = p3y Then &P*r66  
     point_in = True YXF^4||j.c  
     Exit Function Du-Q~I6  
  End If ;<cCT!A  
     *y+K{ fM1  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 31]Vo;D  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) >h9~ /  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 2]x,joB  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) n(n7"+B  
    sum = aob + boc + cod + doa n"~K",~P  
    If 360.01 > sum And sum > 359.99 Then E3x<o<v  
       point_in = True jrm^n_6};  
    Else Xp6Z<Z&N  
       point_in = False a_DK"8I  
    End If Xz/aytp~A  
End Function

'得到点半径,得到交点坐标函数 27F:-C~.9  
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() ,yfJjV*I  
    '求得中心点坐标 5a&gdqg]  
Dim tt As String \pI ,6$'  
Dim rt(3) As Single g,RhUt9  
    '判断是否平行 An BM*5G  
   acx = p3x - p1x (5RZLRn  
   acy = p3y - p1y lZ,$lZg9Z  
   bdx = p4x - p2x h`tf!MD]  
   bdy = p4y - p2y Z#GR)
jb+  
   If acx * bdy = acy * bdx Then R^K:hKQ
 
      rt(0) = 0 TP`"x}ACa?  
      Exit Function ])zpx-  
   Else wA87|YK8*  
      '判断斜率存在否 /sSif0I24  
      If p1x = p3x And p2x <> p4x Then u^L_XA  
         tt = "ac_n_bd_y" H_l>L9/\  
      ElseIf p1x <> p3x And p2x = p4x Then Hjy4tA7,l  
         tt = "ac_y_bd_n" ,(+ZD@Rg  
      ElseIf p1x <> p3x And p2x <> p4x Then \J6e/ G  
         tt = "ac_y_bd_y" |fn%!d`2  
      End If %nkbQ2^  
    Select Case tt hg `N`O  
         Case "ac_n_bd_y" A<[w'"  
            'bd线段方程 ;tZ8Sh)  
            k_bd = bdy / bdx w#sP5qKv8  
            b_bd = p2y - k_bd * p2x H_%ae'W  
            p_x = p1x ^$8WV&5q>  
            p_y = k_bd * p_x + b_bd 1n$  
         Case "ac_y_bd_n" ^687U,+  
            'ac线段方程 q(5
 
            k_ac = acy / acx "N=q>jaX  
            b_ac = p1y - k_ac * p1x _<)HFg6  
            p_x = p2x 49B6|!&I  
            p_y = k_ac * p_x + b_ac KeC&a=HL  
        Case "ac_y_bd_y" mldY/;-H!1  
           'ac，bd线段都要求 9lX+?m~ ~  
           k_ac = acy / acx vXR27  
           b_ac = p1y - k_ac * p1x v;" pc)i  
           k_bd = bdy / bdx cdfnM%`>\  
           b_bd = p2y - k_bd * p2x Z Mf,3  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) NB&zBJ#  
           p_y = k_ac * p_x + b_ac TyaK_XW  
        End Select &y7~  
      rt(1) = p_x JaJyH%+$!  
      rt(2) = p_y Wp=&nh  
     9sB LCZ  
'计算最大半径 ;BEX|wxn  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ,j[1!*Z_[  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) .wuRT>4G)G  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ">R`S<W  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) fR lJ`\ t  
Dim bb(5) As Single p,2H8I){  
  bb(1) = rr1 [i]%PVGW  
  bb(2) = rr2 8j@ADfZ9  
  bb(3) = rr3 OKNGV,{`  
  bb(4) = rr4 X^.~f+d~  
  nb = rr1 '\LU 8VC  
For i = 1 To 4 Ua>.k|>0  
    If nb <= bb(i) Then 1++Fs  
       nb = bb(i) S!~p/bB[+I  
    End If bY=Yb  
Next i ~*G}+Ur$2  
    rt(0) = Sqr(nb) 8EZ,hY^  
    rr = rt() +PHuQ  
  End If ?h ym~,  
         G)7J$4R  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  
'O]Ja-  

} T<oLvS  
有热压工艺方面的人才或者资料分享下； 'QEQyJ0EB  
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 e.^Y4(  

高手真多！

楼主威武霸气.