[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： T9enyYt%  
kJP fL s  
fDo )~t*~  

关键点说几个： [4,=%ez  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） yP\KIm!  
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 o@[yF<  
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 m_~!Lj[u.  

以下是几个重要的函数： #)`N  
1.判断点在区域中函数 ]v7f9MC'\  
2.计算夹角函数 1au1DvH  
3.转置函数 ^`NU:"  
4.得到区域中心点，及区域半径函数 Y9fktg.  
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） nff&~lwhZ  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 1ipfv-hb6  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single kxU<?0  
   cax = x2 - x1 -miWXEe@l  
   cay = y2 - y1 7)sEW#d!  
   cbx = x2 - x3 "H
Tp1  
   cby = y2 - y3 mB&nN+MV  
   mo_jj = cax * cbx + cay * cby t?H.M  
   mo_ca = Sqr(cax * cax + cay * cay) iLf:an*vH  
   mo_cb = Sqr(cbx * cbx + cby * cby) !$r4 lu  
   cos_acb = mo_jj / (mo_ca * mo_cb) M^I*;{
w6i  
   'ff_cos = cos_acb z6e)|*cA$  
   If cos_acb >= 1 Then WvVHSa4{  
   nn = 0 N|pjGgI  
   ElseIf cos_acb <= -1 Then %KL"f  
   nn = 3.14159265258979 e<s56<3j  
   Else %''z~LzJ8  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 4Eh 2sI  
   End If 6B 4Sd  
   'ff_angle = nn 'vKB]/e;  
   ff_angle = nn * 180 / 3.14159265258979 0MDdcjqw  
End Function

'判断点在区域内函数 .`4N#EjP  
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 y
Gl (QLk  
Dim aob, boc, cod, doa, sum As Single Ezw(J[).C  
  If ppx = p1x And ppy = p1y Then z^=.05jB  
     point_in = True Zj;2>  
     Exit Function ?d`?Ss;v  
  End If W70J2
 
  If ppx = p2x And ppy = p2y Then Ql8E9~h  
     point_in = True /VB n  
     Exit Function OMG.64DX .  
  End If @a,X{0  
   If ppx = p3x And ppy = p3y Then ='f<_FD  
     point_in = True Yjxa
=CD  
     Exit Function ~@=:I  
  End If 5 OR L  
     g0t$1cUR  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ?Pz:H/$  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 4Fhiac  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Kl.xe&t@j  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) zA[6rYXY  
    sum = aob + boc + cod + doa O[[:3!6q  
    If 360.01 > sum And sum > 359.99 Then [AE-~+m)^  
       point_in = True fhqc[@Y[  
    Else xi=Z<G  
       point_in = False | ZBv;BW  
    End If cQEK>aAd  
End Function

'得到点半径,得到交点坐标函数 ^G'8!!ys  
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() -+4:} sD  
    '求得中心点坐标 F-Mf~+=Dn  
Dim tt As String %.,-dV'  
Dim rt(3) As Single clK3kBh~&  
    '判断是否平行 j48cI3C  
   acx = p3x - p1x Bv,u kQ\CH  
   acy = p3y - p1y un|
+YqLf  
   bdx = p4x - p2x >-rDBk ;K  
   bdy = p4y - p2y xvP<~N-  
   If acx * bdy = acy * bdx Then "e62g  
      rt(0) = 0 C;2!c
 
      Exit Function t(/b'Peq  
   Else 4L#q?]$  
      '判断斜率存在否 p]=a:kd4J  
      If p1x = p3x And p2x <> p4x Then i6wLM-.)  
         tt = "ac_n_bd_y" $h1`-=\7  
      ElseIf p1x <> p3x And p2x = p4x Then {U8Sl.  
         tt = "ac_y_bd_n" 8 PI>Q  
      ElseIf p1x <> p3x And p2x <> p4x Then :9H=D^J  
         tt = "ac_y_bd_y" HN,E+dQ  
      End If k&|L"N|
w  
    Select Case tt Z4NNrA#  
         Case "ac_n_bd_y" KJc fbZ~  
            'bd线段方程 8_0j^oh  
            k_bd = bdy / bdx &UH .e  
            b_bd = p2y - k_bd * p2x u '-4hU  
            p_x = p1x =*0<.Lo':  
            p_y = k_bd * p_x + b_bd E/x``,k  
         Case "ac_y_bd_n" `Q?rQ3A}  
            'ac线段方程 -U;2 b_  
            k_ac = acy / acx D?~`L[}I!}  
            b_ac = p1y - k_ac * p1x BeZr5I"`}  
            p_x = p2x i-Ck:-J  
            p_y = k_ac * p_x + b_ac '&@'V5}C{  
        Case "ac_y_bd_y" v <1d3G=G  
           'ac，bd线段都要求 T7vilfO5G  
           k_ac = acy / acx q9rY++Tv  
           b_ac = p1y - k_ac * p1x zs!,PQF(  
           k_bd = bdy / bdx R,[dEP  
           b_bd = p2y - k_bd * p2x yHL2!  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 6J[ {?,  
           p_y = k_ac * p_x + b_ac }MBxfZ4I  
        End Select 3'WJx=0?  
      rt(1) = p_x [#S[=%  
      rt(2) = p_y 7Pspx'u  
     /bm$G"%d  
'计算最大半径 @ht= (Jk9  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 1,,kU  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) !v(j#N< m  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) "<6X=|C  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) _bB:1l?V  
Dim bb(5) As Single M:V'vme)+  
  bb(1) = rr1 e]-bB#-A  
  bb(2) = rr2 xgV.<^  
  bb(3) = rr3 =\]5C  
  bb(4) = rr4 x*GGO)r  
  nb = rr1 v|Y:'5`V  
For i = 1 To 4 kj_o I5<'  
    If nb <= bb(i) Then _E0XUT!rA  
       nb = bb(i) ?HT+| !4p  
    End If 5etbJk  
Next i Wt=QCutt  
    rt(0) = Sqr(nb) 2LS
03 27  
    rr = rt() AA[(rw  
  End If
:D(4HXHK%  
         297X).  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  6}z-X*  

+pcGxje\  
有热压工艺方面的人才或者资料分享下； r{+P2MPW  
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 ~PaEhj&8  

高手真多！

楼主威武霸气.