[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： q]s_hWWv  
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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： kQn}lD
 
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 8kE3\#);\  
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 8]bLp  
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 : JS
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以下是几个重要的函数： A\13*4:;l  
1.判断点在区域中函数 SDs#w  
2.计算夹角函数 rD9:4W`^  
3.转置函数 D.ySnYzh  
4.得到区域中心点，及区域半径函数 b"B:DDw00  
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） &VG  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 U"~W3vwJ  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single o7eWL/1  
   cax = x2 - x1 <Pi#-r.,  
   cay = y2 - y1 ;82?ACCP  
   cbx = x2 - x3 wyXQP+9G  
   cby = y2 - y3 8# x7q>?  
   mo_jj = cax * cbx + cay * cby xJA{Hws  
   mo_ca = Sqr(cax * cax + cay * cay) rj4R/{h  
   mo_cb = Sqr(cbx * cbx + cby * cby) )lq+Gv[%F  
   cos_acb = mo_jj / (mo_ca * mo_cb) ntW1 )H'o  
   'ff_cos = cos_acb LC\U6J't1  
   If cos_acb >= 1 Then Z#YNL-x  
   nn = 0 BO%'/2eV  
   ElseIf cos_acb <= -1 Then *dPbV.HCl  
   nn = 3.14159265258979 {faIyKtW  
   Else  Fh|{ib  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) usC$NVdm  
   End If z%\&n0  
   'ff_angle = nn e^$JGh2  
   ff_angle = nn * 180 / 3.14159265258979 G.PRPl  
End Function

'判断点在区域内函数 .8T0OQ4  
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 G\B+bBz  
Dim aob, boc, cod, doa, sum As Single -:OJX#j  
  If ppx = p1x And ppy = p1y Then n 8 K6m(  
     point_in = True 1l Cr?  
     Exit Function `*D"=5G+  
  End If =G"ney2  
  If ppx = p2x And ppy = p2y Then \-f/\P/ w  
     point_in = True U3Z-1G~*r  
     Exit Function C\B4Uu6q  
  End If _ElG&hyp  
   If ppx = p3x And ppy = p3y Then \O\q1 s~  
     point_in = True 0G0(g,3p  
     Exit Function p@[ fZj  
  End If
"F6gV;{Bt  
     oR/_{#Mz"  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) !&NrbiuN  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) J_.cC  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) tw&v@HUP  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) &b7_%,Bx
4  
    sum = aob + boc + cod + doa ]}p<P):hO  
    If 360.01 > sum And sum > 359.99 Then P{yb%@I~J  
       point_in = True x":o*(rSQ  
    Else =O-irGms*  
       point_in = False j4+Px%sW  
    End If n?;rWq"  
End Function

'得到点半径,得到交点坐标函数 2#r4dr0  
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() k~ByICE  
    '求得中心点坐标 {]Hv*{ ]  
Dim tt As String m}\QGtJ6  
Dim rt(3) As Single Wpi35JrC  
    '判断是否平行 t(9q6x3|e  
   acx = p3x - p1x U+@U/s%8  
   acy = p3y - p1y y&-QLX L  
   bdx = p4x - p2x "WUS?Q  
   bdy = p4y - p2y zsJermF,O  
   If acx * bdy = acy * bdx Then K,$rG%czX  
      rt(0) = 0 $LFL4Q  
      Exit Function /XEW]/4  
   Else }v4dOGc?  
      '判断斜率存在否 q!?*M?Oz  
      If p1x = p3x And p2x <> p4x Then b*M?\ aA  
         tt = "ac_n_bd_y" O#^H.B  
      ElseIf p1x <> p3x And p2x = p4x Then 3RT\G0?8f  
         tt = "ac_y_bd_n" stBe ^C  
      ElseIf p1x <> p3x And p2x <> p4x Then fe,6YXUf  
         tt = "ac_y_bd_y" pDSNI2  
      End If 2wHbhW[  
    Select Case tt ;}"Eqq:  
         Case "ac_n_bd_y" |E.BGdS  
            'bd线段方程 OTdijQLY  
            k_bd = bdy / bdx %0N HU`j  
            b_bd = p2y - k_bd * p2x V?1 $H  
            p_x = p1x kuV7nsXiQ  
            p_y = k_bd * p_x + b_bd  7-!n-  
         Case "ac_y_bd_n" _Uq' N0U  
            'ac线段方程 }Mt1C~{(  
            k_ac = acy / acx =@?[.`  
            b_ac = p1y - k_ac * p1x fzQR
0  
            p_x = p2x Zrr)<'!i  
            p_y = k_ac * p_x + b_ac ]p3f54!  
        Case "ac_y_bd_y" C?T\5}h  
           'ac，bd线段都要求
Cl]?qH*:  
           k_ac = acy / acx O6R)>Y4  
           b_ac = p1y - k_ac * p1x Qop,~yK  
           k_bd = bdy / bdx m(6d3P  
           b_bd = p2y - k_bd * p2x A>1$?A8Q  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) q`b6if"  
           p_y = k_ac * p_x + b_ac ;54NQB3L  
        End Select vjlN@ "  
      rt(1) = p_x '#Au~5  
      rt(2) = p_y ?YLq iAA  
     (^m] 7l  
'计算最大半径 8Auek#[  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) {YzCgf  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) '#V@a  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) @wI>0B  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) /[.V(K D  
Dim bb(5) As Single )ffaOS!\  
  bb(1) = rr1 hx$61E=  
  bb(2) = rr2 -}|L<~  
  bb(3) = rr3 uK2HtRY1  
  bb(4) = rr4 %+N]$Q  
  nb = rr1 ,=P&{38\q  
For i = 1 To 4 T8x)i\<  
    If nb <= bb(i) Then 4a+gM._+O  
       nb = bb(i) bOFzq>k_  
    End If cMXv  
Next i O -1O@:}c  
    rt(0) = Sqr(nb) ~v.mbh  
    rr = rt() G`Nw]_ Z_  
  End If 0\P5=hD)K  
         _SAM8!q4,  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  |a{;<a  

q\EYsN</;  
有热压工艺方面的人才或者资料分享下； Cn~VJ,l g  
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 xt^1,V4Ei~  

高手真多！

楼主威武霸气.