[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： ]/%CTD(O  
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关键点说几个： \TYH7wXDP  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） z}*L*Sk  
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 y>r^ MQ  
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 k4^!"~<+0  

以下是几个重要的函数： ,
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1.判断点在区域中函数 ;M*G  
2.计算夹角函数 WtMDHfwqu\  
3.转置函数 F/df!I~  
4.得到区域中心点，及区域半径函数 9; aOUs:<  
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） ^Uik{x  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 AUr~b3< 6
 
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single
"z{rC}  
   cax = x2 - x1 g'.(te |  
   cay = y2 - y1 ey U*20  
   cbx = x2 - x3 QY1|:(  
   cby = y2 - y3 FyllVrK  
   mo_jj = cax * cbx + cay * cby ,T+.xB;Q@  
   mo_ca = Sqr(cax * cax + cay * cay) uCf _O~  
   mo_cb = Sqr(cbx * cbx + cby * cby) QU)A
gF[
 
   cos_acb = mo_jj / (mo_ca * mo_cb) kY~o3p<  
   'ff_cos = cos_acb L:UPS&)  
   If cos_acb >= 1 Then iE"+-z\U  
   nn = 0 nh/%0=S  
   ElseIf cos_acb <= -1 Then Sfffm$H  
   nn = 3.14159265258979 "J%dI9tM{  
   Else [4\n(/  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) )"Dl,Fig:/  
   End If Yj*!t1qm  
   'ff_angle = nn %I%OHs  
   ff_angle = nn * 180 / 3.14159265258979 QbEb} Jt  
End Function

'判断点在区域内函数 K,f- w2!  
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 zd{\XW  
Dim aob, boc, cod, doa, sum As Single aHSl_[  
  If ppx = p1x And ppy = p1y Then |j!U/n.%w  
     point_in = True Y86mg7[U/  
     Exit Function Rj])c^ZA'*  
  End If 70T{tB  
  If ppx = p2x And ppy = p2y Then k'-5&Q  
     point_in = True 2NZC,znQ  
     Exit Function ,<]~/5-f  
  End If .=/TT|eMS  
   If ppx = p3x And ppy = p3y Then Ab:+AC5{  
     point_in = True &u9@FFBT8  
     Exit Function _K<Z  
  End If WXJ%hA  
     unAu8k^  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) }/.GB5Ej  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) w8(z\G_0  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) V})b.\"F  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) p JM&R<i:  
    sum = aob + boc + cod + doa ]"VxEpqhM  
    If 360.01 > sum And sum > 359.99 Then ZRj&k9D^U  
       point_in = True E6s)J -a  
    Else 5HW'nhE  
       point_in = False j@Y'>3  
    End If h7o?z!  
End Function

'得到点半径,得到交点坐标函数 V8"m_  
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() SuFGIb7E  
    '求得中心点坐标 ^#)]ICV  
Dim tt As String 3\0,>L9ET@  
Dim rt(3) As Single B
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    '判断是否平行 G
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   acx = p3x - p1x K)s{D]B  
   acy = p3y - p1y Q;y)6+VU4  
   bdx = p4x - p2x cX4I+Mf  
   bdy = p4y - p2y 3D2i32Y@!  
   If acx * bdy = acy * bdx Then Wr;9Mz&{  
      rt(0) = 0 b+e9Pi*\  
      Exit Function v)%0`%nSR  
   Else 6QG"~>v7'(  
      '判断斜率存在否 4O:y ?D/e  
      If p1x = p3x And p2x <> p4x Then bSj-xxB]e  
         tt = "ac_n_bd_y" }ISc^W) t  
      ElseIf p1x <> p3x And p2x = p4x Then ytyB:# J  
         tt = "ac_y_bd_n" v&8
s>~i`K  
      ElseIf p1x <> p3x And p2x <> p4x Then '0 J*9  
         tt = "ac_y_bd_y" a

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      End If F6gU9=F1<  
    Select Case tt vMeB2r<  
         Case "ac_n_bd_y" }5]7lGR  
            'bd线段方程 M992XXd  
            k_bd = bdy / bdx *dPG[ }  
            b_bd = p2y - k_bd * p2x o3(:R0  
            p_x = p1x OI
^sd_gkZ  
            p_y = k_bd * p_x + b_bd qw6i|JM%  
         Case "ac_y_bd_n" x|GkXD3  
            'ac线段方程 OZ6:u^OS]  
            k_ac = acy / acx s|!lw  
            b_ac = p1y - k_ac * p1x ,j e  
            p_x = p2x LW!>_~g-  
            p_y = k_ac * p_x + b_ac 6\vaR#  
        Case "ac_y_bd_y" L-1#n  
           'ac，bd线段都要求 XNQPyZ2@|b  
           k_ac = acy / acx l-?#oy  
           b_ac = p1y - k_ac * p1x e&-MP;kgW9  
           k_bd = bdy / bdx $nr=4'yZ  
           b_bd = p2y - k_bd * p2x P`AW8Y6o  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) R^&.:;Wi>  
           p_y = k_ac * p_x + b_ac Hd57Iw  
        End Select <HH\VG\H6  
      rt(1) = p_x S9%ZeM+  
      rt(2) = p_y t 09-y  
     tP4z#0r2  
'计算最大半径 sQBKzvFO3  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) aY0{vX  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 2hsRYh  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) (/KeGgkhv  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) <RuLIu  
Dim bb(5) As Single SA%uGkm:e  
  bb(1) = rr1 m2[]`Ir^@  
  bb(2) = rr2 L [&|<<c  
  bb(3) = rr3 jwmPy)X|s\  
  bb(4) = rr4 w_#C8}2  
  nb = rr1 epgAfx-_OH  
For i = 1 To 4 = ( 4l  
    If nb <= bb(i) Then QXEz  
       nb = bb(i) [@Mo3]#\  
    End If mC} b>\  
Next i TjicltQi4  
    rt(0) = Sqr(nb) >~jl0!2z@  
    rr = rt() -+[~eqRB  
  End If lUd4`r"  
         BAojP1}+
,  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  &'Xgf!x  

JW"`i   
有热压工艺方面的人才或者资料分享下； n4.\}%=z  
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 `l %,4qR  

高手真多！

楼主威武霸气.