[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： ' ZTRl+  
G.XxlI}  
[X@{xF^vBQ  

关键点说几个： j+AZ!$E  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） :&z!o"K  
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 q\!"FDOl4  
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 `'r]Oe  

以下是几个重要的函数： PeEaF@#k  
1.判断点在区域中函数 *CF80
DJ  
2.计算夹角函数 :|I"Em3R  
3.转置函数 :nnch?J_  
4.得到区域中心点，及区域半径函数 @c8RlW/A  
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） #vy[v22  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 bccf4EyQ Y  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ~$ ?85   
   cax = x2 - x1 T|YMU?4  
   cay = y2 - y1 V*%><r  
   cbx = x2 - x3 UY.o,I>s  
   cby = y2 - y3 9K&YHg:1  
   mo_jj = cax * cbx + cay * cby HPO:aGU  
   mo_ca = Sqr(cax * cax + cay * cay) #f=41d%  
   mo_cb = Sqr(cbx * cbx + cby * cby) MM@&QaK  
   cos_acb = mo_jj / (mo_ca * mo_cb) V%M@zd?u.  
   'ff_cos = cos_acb ky]L`
w  
   If cos_acb >= 1 Then -=1>t3~\  
   nn = 0 XL1
x8IB  
   ElseIf cos_acb <= -1 Then nM8'="$  
   nn = 3.14159265258979 Ve"M8-{oKk  
   Else R>[G6LOG  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 3ox|Mz<aZX  
   End If G
-o6~"J\  
   'ff_angle = nn NZ^hp\q  
   ff_angle = nn * 180 / 3.14159265258979 uAk>VPuuZ  
End Function

'判断点在区域内函数 gHWsKE
%  
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 =| r% lx  
Dim aob, boc, cod, doa, sum As Single lj*=bK  
  If ppx = p1x And ppy = p1y Then WZbRR.TxO  
     point_in = True j2hp*C'^  
     Exit Function ~Bt>Y  
  End If W>u$x=<T  
  If ppx = p2x And ppy = p2y Then 7<5=fYbr  
     point_in = True vcOw`oS  
     Exit Function u$"Ew^C  
  End If .z,`{-7U  
   If ppx = p3x And ppy = p3y Then immf\
 
     point_in = True #Y'ub 5s  
     Exit Function Qz<i{r-z  
  End If p<RIvSqM  
     C8 $KVZ  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ch/DBu  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 5*y6{7FLp  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) s*e1m%  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) l
p1GK/!s  
    sum = aob + boc + cod + doa hi ),PfAV  
    If 360.01 > sum And sum > 359.99 Then gp^xl>E  
       point_in = True R8j\CiV17  
    Else m]VOw)mBF  
       point_in = False drB$q[Ak9  
    End If 3`njQvI\  
End Function

'得到点半径,得到交点坐标函数 T FK#ign  
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() F:G Vysy  
    '求得中心点坐标 ]ex2c{ G  
Dim tt As String 6"o@d8>v  
Dim rt(3) As Single 6[]O3Aa  
    '判断是否平行 >td\PW~X  
   acx = p3x - p1x SiT5QJe  
   acy = p3y - p1y u< 5{H='6  
   bdx = p4x - p2x t,yMO  
   bdy = p4y - p2y ^ Mq8jw(2  
   If acx * bdy = acy * bdx Then xcXnd"YYE  
      rt(0) = 0 '&iAPc4=  
      Exit Function BbNl:`  
   Else 5S%#3YHY2  
      '判断斜率存在否 ,k6V?{ZA  
      If p1x = p3x And p2x <> p4x Then "l-b(8n  
         tt = "ac_n_bd_y" pRh)DM#9  
      ElseIf p1x <> p3x And p2x = p4x Then {&)E
$M  
         tt = "ac_y_bd_n" (=QiXX1r  
      ElseIf p1x <> p3x And p2x <> p4x Then 24d{ol)  
         tt = "ac_y_bd_y" 2NWQiSz  
      End If !4fT<V(  
    Select Case tt I!g+K  
         Case "ac_n_bd_y" 
l|  QQ  
            'bd线段方程 @@+BPLl  
            k_bd = bdy / bdx ]=sGLd^)E  
            b_bd = p2y - k_bd * p2x j:J7
  
            p_x = p1x ZTi KU)  
            p_y = k_bd * p_x + b_bd qfB!)Y  
         Case "ac_y_bd_n" Q+^"v]V`d  
            'ac线段方程 ^$J.l+<hy  
            k_ac = acy / acx [kPF Jf  
            b_ac = p1y - k_ac * p1x ?lQ-HOAw  
            p_x = p2x ]*yUb-xY  
            p_y = k_ac * p_x + b_ac wO*x0$  
        Case "ac_y_bd_y" |6zx YuX  
           'ac，bd线段都要求 E>x,$w<?  
           k_ac = acy / acx [O^mG 9  
           b_ac = p1y - k_ac * p1x :3By7BZgj  
           k_bd = bdy / bdx Y-:dPc{  
           b_bd = p2y - k_bd * p2x n~v*  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) G:!'hadw  
           p_y = k_ac * p_x + b_ac ;Qdw$NuW  
        End Select 2g_2$)2  
      rt(1) = p_x bxF'`^En  
      rt(2) = p_y };nOG;  
     5?C) v}w+  
'计算最大半径 1<&nHFJ;[  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ?89_2W  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) sGFC?1r?\  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) >`Zw0S  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ?wbf)fbq  
Dim bb(5) As Single WR
fhxl  
  bb(1) = rr1 +p_>fO  
  bb(2) = rr2 g7<u eF  
  bb(3) = rr3 C;oT0(  
  bb(4) = rr4 v L!?4k  
  nb = rr1 cR/z;*wr7  
For i = 1 To 4 Tyt1a>!qA  
    If nb <= bb(i) Then >Gi*BB  
       nb = bb(i) 6Bn%7ZBv  
    End If kU[#. y=%p  
Next i J={IGA  
    rt(0) = Sqr(nb) ,L9ioYbp  
    rr = rt() ~YCZvJ  
  End If >r5s>A[YC  
         ?UV!^w@L:0  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  OD\F*Ry~  

+X&b  
有热压工艺方面的人才或者资料分享下； _yJAn\  
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 sGdlS&08(  

高手真多！

楼主威武霸气.