[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： |2 YubAIZ(  
(b/A|hl  
Yo~LckFF  

关键点说几个： /9x{
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1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） fm(mO%  
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 :]P~.PD5,  
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 }x
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以下是几个重要的函数： :P3{Nxa  
1.判断点在区域中函数 WtEI] WO  
2.计算夹角函数 )PR3s1S^  
3.转置函数 ojHhT\M`  
4.得到区域中心点，及区域半径函数 ldA!ou7  
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） kOw=c Gt  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 pet~[e%!  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ;HDZ+B  
   cax = x2 - x1 O|QUNr9  
   cay = y2 - y1 |6aJwe+*  
   cbx = x2 - x3 pz{'1\_+9  
   cby = y2 - y3 bmu6@jT  
   mo_jj = cax * cbx + cay * cby 089 k.WG  
   mo_ca = Sqr(cax * cax + cay * cay) LheFQ A  
   mo_cb = Sqr(cbx * cbx + cby * cby) #ZJMlJ:q`"  
   cos_acb = mo_jj / (mo_ca * mo_cb) NUCiY\td  
   'ff_cos = cos_acb ._?V%/  
   If cos_acb >= 1 Then W{ fZ[z  
   nn = 0 Gqb])gXpl  
   ElseIf cos_acb <= -1 Then yGxv?%%2  
   nn = 3.14159265258979 OF[?Z  
   Else l
_+6=u  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) [E7MsX  
   End If 8-m 3e  
   'ff_angle = nn [$pmPr2  
   ff_angle = nn * 180 / 3.14159265258979 jNA1O68N  
End Function

'判断点在区域内函数 z[C3  
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 Ql%qQ
ZV  
Dim aob, boc, cod, doa, sum As Single m}3gZu]  
  If ppx = p1x And ppy = p1y Then  Ow:1?Z{4  
     point_in = True gd7^3q[$h  
     Exit Function FY'ty@|_s  
  End If 4nqoZk^R  
  If ppx = p2x And ppy = p2y Then &
H||&Z[pk  
     point_in = True !2tW$
BP^  
     Exit Function $g10vF3  
  End If \K iwUz  
   If ppx = p3x And ppy = p3y Then "Pz}@=  
     point_in = True @F~LW6K  
     Exit Function $s\UL}Gc  
  End If g5Z#xszj+  
     1[;;sSp  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 4/e60jA  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) B=Ym x2A9]  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 80pid[F  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) f )Z%pgB  
    sum = aob + boc + cod + doa nV*y`.+  
    If 360.01 > sum And sum > 359.99 Then 71fk.16  
       point_in = True wQ+8\ s=  
    Else {Qv>q$Q  
       point_in = False S'LZk9E  
    End If dRi5hC$  
End Function

'得到点半径,得到交点坐标函数 &fC!(Oy  
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() ~EzaC?fQ  
    '求得中心点坐标 FR[ B v  
Dim tt As String `d]IX^;  
Dim rt(3) As Single +|iYg/2  
    '判断是否平行 @f+8%I3D  
   acx = p3x - p1x :O<bA&:d  
   acy = p3y - p1y LhXUm  
   bdx = p4x - p2x +!IQj0&'Y3  
   bdy = p4y - p2y g7V8D  
   If acx * bdy = acy * bdx Then ?>c=}I#Ui-  
      rt(0) = 0 + @9.$6N  
      Exit Function :~Q!SL N  
   Else wxg^Bq)D*R  
      '判断斜率存在否 M 3 '$[  
      If p1x = p3x And p2x <> p4x Then m([(:.X/IX  
         tt = "ac_n_bd_y" "@A![iP  
      ElseIf p1x <> p3x And p2x = p4x Then j(:I7%3&(*  
         tt = "ac_y_bd_n" 7hW+T7u?  
      ElseIf p1x <> p3x And p2x <> p4x Then GQQ.OvEc  
         tt = "ac_y_bd_y" }v9\F-0>Q  
      End If w%AcG~`j!B  
    Select Case tt #`TgZKDg2  
         Case "ac_n_bd_y" H=
*5ASc  
            'bd线段方程 `afIYXP  
            k_bd = bdy / bdx 0P^L}VVX  
            b_bd = p2y - k_bd * p2x n<sd!xmqFx  
            p_x = p1x Ji1Pz)fq  
            p_y = k_bd * p_x + b_bd tM-^<V&  
         Case "ac_y_bd_n" XqRJr%JH  
            'ac线段方程 &8&d3EQ  
            k_ac = acy / acx wbDM5%  
            b_ac = p1y - k_ac * p1x '{I_\~*  
            p_x = p2x a,F&`Wg  
            p_y = k_ac * p_x + b_ac ;*ix~taL%  
        Case "ac_y_bd_y" CQ`=V2:"ON  
           'ac，bd线段都要求
T_b^ Tc`  
           k_ac = acy / acx bNFLO Q  
           b_ac = p1y - k_ac * p1x *<N3_tx"  
           k_bd = bdy / bdx ;6@r-r  
           b_bd = p2y - k_bd * p2x V.ht, ~l  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) "mL++>ZSQ  
           p_y = k_ac * p_x + b_ac 2!&&|Mh}  
        End Select HEL!GC>#  
      rt(1) = p_x f/WQ[\<!I  
      rt(2) = p_y I;5R2" 3  
     ~\x:<)  
'计算最大半径 RLlU" sw+{  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) >hBxY]< \  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) /bj <Ft\  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Go,N>HN  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) H&r,FmI@  
Dim bb(5) As Single 3lV^B[$  
  bb(1) = rr1  +`7KSwa  
  bb(2) = rr2 EbeI{-'aF  
  bb(3) = rr3 DG4d"Jy  
  bb(4) = rr4 -a*K$rnB  
  nb = rr1 Kvsh  
For i = 1 To 4 yc|VJ2R*  
    If nb <= bb(i) Then dz~coZ9  
       nb = bb(i) iAT)VQ&  
    End If =%
'`YbD$  
Next i R52I= a5,*  
    rt(0) = Sqr(nb) l3N I$Zu  
    rr = rt() 1ygpp0IGJ  
  End If +,~zWv1v  
         VG/3xR&y  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  |>z3E z  

(rg;IXAq%  
有热压工艺方面的人才或者资料分享下； i1RiGS
 
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 epg
PT'^  

高手真多！

楼主威武霸气.