[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： T#YJ5Xw  
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关键点说几个： :w9s bW  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Ix.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 $btk48a7  
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 )Q~K\bJf  

以下是几个重要的函数： l\
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1.判断点在区域中函数 :w26d-QR(  
2.计算夹角函数 #D Oui]  
3.转置函数 +{&++^(}a  
4.得到区域中心点，及区域半径函数 .10$n*  
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） joJQ?lG  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 -hP>;~*4  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single -<@QR8:  
   cax = x2 - x1 Xs$UpQo   
   cay = y2 - y1 S!.H _=z%p  
   cbx = x2 - x3 uzaDK  
   cby = y2 - y3 ? VHOh9|AT  
   mo_jj = cax * cbx + cay * cby ivP#qM1*;  
   mo_ca = Sqr(cax * cax + cay * cay) f VpE&F  
   mo_cb = Sqr(cbx * cbx + cby * cby) )\l(h%s[I  
   cos_acb = mo_jj / (mo_ca * mo_cb) L%0G >2x  
   'ff_cos = cos_acb m7.6;k.  
   If cos_acb >= 1 Then 6e At`L[K.  
   nn = 0 @SH$QUM(  
   ElseIf cos_acb <= -1 Then ,(Nr_K  
   nn = 3.14159265258979 nQ^ c{Bm:  
   Else 629#t`W\  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) (b;*8  
   End If "tg?V  
   'ff_angle = nn *waaM]u  
   ff_angle = nn * 180 / 3.14159265258979 nY50dFA,  
End Function

'判断点在区域内函数 _jD\kg#LY  
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 nypG  
Dim aob, boc, cod, doa, sum As Single "P@oO,.  
  If ppx = p1x And ppy = p1y Then b[`
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     point_in = True Tt\G
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     Exit Function 2(K@V6j$M  
  End If kr>H,%3~  
  If ppx = p2x And ppy = p2y Then LV!<vakCK  
     point_in = True &ub0t9R  
     Exit Function KkD&|&!Q7u  
  End If 
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   If ppx = p3x And ppy = p3y Then $I:&5o i  
     point_in = True U@<]>.$  
     Exit Function GR>kxYM%q  
  End If o-r00H|  
     qB8R4wCf  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) xdkC>o4>  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) DRuG5|{I:  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) xmBGZ4f%  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) PQA}_o  
    sum = aob + boc + cod + doa Gsa~zGN  
    If 360.01 > sum And sum > 359.99 Then 4g^Xe-  
       point_in = True :*dfP
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    Else 8(|lP58~  
       point_in = False IJ#+"(?7,u  
    End If v2;'F  
End Function

'得到点半径,得到交点坐标函数 $s"{C"4q  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() tiQeON-Q_  
    '求得中心点坐标 5}NTqN0@  
Dim tt As String O"V;o
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Dim rt(3) As Single o#9Q   
    '判断是否平行 83g$k 9lG.  
   acx = p3x - p1x ibn(eu<uW  
   acy = p3y - p1y iM(Q-%HP_  
   bdx = p4x - p2x \k>1q/T0V  
   bdy = p4y - p2y `|WEz
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   If acx * bdy = acy * bdx Then Q7@oAeNd  
      rt(0) = 0 U2vM|7]VP  
      Exit Function Y=\:fa  
   Else ~Y3X*  
      '判断斜率存在否  /wT<p  
      If p1x = p3x And p2x <> p4x Then Y4Y~ep  
         tt = "ac_n_bd_y" 8"yZS)09  
      ElseIf p1x <> p3x And p2x = p4x Then WO!'("  
         tt = "ac_y_bd_n" B&>z&!}  
      ElseIf p1x <> p3x And p2x <> p4x Then gi #dSd1\&  
         tt = "ac_y_bd_y" P87Lo
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      End If %_%BbQf  
    Select Case tt O 8XHaVLg3  
         Case "ac_n_bd_y" iOJ5KXrAO  
            'bd线段方程 W*r
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            k_bd = bdy / bdx J^y?nE(j  
            b_bd = p2y - k_bd * p2x yV
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            p_x = p1x -OXC;y  
            p_y = k_bd * p_x + b_bd M2pFXU?]  
         Case "ac_y_bd_n" 2KtK.2;7  
            'ac线段方程 PnZC I!Mw  
            k_ac = acy / acx W[<ZI>mf  
            b_ac = p1y - k_ac * p1x ,#U[
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            p_x = p2x zEk/15  
            p_y = k_ac * p_x + b_ac H*HL:o-[  
        Case "ac_y_bd_y" wDDNB1_E  
           'ac，bd线段都要求 D`R~d;U~  
           k_ac = acy / acx xO&qo8*  
           b_ac = p1y - k_ac * p1x [,56oMd~  
           k_bd = bdy / bdx ,Q<mU
4  
           b_bd = p2y - k_bd * p2x E<sd\~~A:  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) WS//0  
           p_y = k_ac * p_x + b_ac 7#(0GZN9h%  
        End Select aM+Am,n`@  
      rt(1) = p_x 3?e~J"WXC5  
      rt(2) = p_y q~`dxq`}  
     "p]!="\  
'计算最大半径 spT$}F2n  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) =SD^Jl{H  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Jq?Fi'2F%  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 6bN8}\5  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) gY!?JZC-0  
Dim bb(5) As Single  JKV&c=I  
  bb(1) = rr1 N}>[To3  
  bb(2) = rr2 Xo$SQ0K  
  bb(3) = rr3 +U)4V}S)  
  bb(4) = rr4 0<93i   
  nb = rr1 ![9$ru  
For i = 1 To 4 ?Wc+ J4  
    If nb <= bb(i) Then ow{J;vFy\  
       nb = bb(i) 0Wj,=9q  
    End If 2Z>8ROv^X  
Next i _L+j6N.h1  
    rt(0) = Sqr(nb) zx5#eMD  
    rr = rt() (67byO{  
  End If X;n09 L`CB  
         ZUkM8M
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End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  1;H"4u_IG&  

J8i,[,KcE  
有热压工艺方面的人才或者资料分享下； Sb> &m  
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 %1:caa@_p  

高手真多！

楼主威武霸气.