[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： 9?W38EF  
VU*{E  
4[&6yHJ^  

关键点说几个： %GS)9{T&  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） WiviH#hF  
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/;bm*U<K  
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 I$wP`gQh
 

以下是几个重要的函数： c/2OR#$t  
1.判断点在区域中函数 f3l >26  
2.计算夹角函数 WuGm~<NS  
3.转置函数 `?6m0|\@  
4.得到区域中心点，及区域半径函数 O.K8$  
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） cdIy[ 1  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 wc,y+C#V  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single xZhD6'Zzz  
   cax = x2 - x1 $0W0+A$  
   cay = y2 - y1 cq9Q7<&MF  
   cbx = x2 - x3 #uXOyiE  
   cby = y2 - y3 D@JHi
'F  
   mo_jj = cax * cbx + cay * cby Om1z  
   mo_ca = Sqr(cax * cax + cay * cay) Vi?Z`G]w!  
   mo_cb = Sqr(cbx * cbx + cby * cby) ~IWi@m{  
   cos_acb = mo_jj / (mo_ca * mo_cb) m9B3]H  
   'ff_cos = cos_acb gaCGU<L  
   If cos_acb >= 1 Then !eTS PM  
   nn = 0 G#*!)#M <
 
   ElseIf cos_acb <= -1 Then ntkinbbD  
   nn = 3.14159265258979 Uq+ _#{2(  
   Else mpF_+Mn  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 2E1TJ.[BS  
   End If Q)}\
4&4  
   'ff_angle = nn G[^G~U\+!  
   ff_angle = nn * 180 / 3.14159265258979 :<v$vER,&  
End Function

'判断点在区域内函数 @}Z/{Z[@  
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 lKD@2  
Dim aob, boc, cod, doa, sum As Single (hV"z;rI  
  If ppx = p1x And ppy = p1y Then ii2Z}qe  
     point_in = True jlP7'xt1%  
     Exit Function &e)p6Egl  
  End If 3"hR:'ts  
  If ppx = p2x And ppy = p2y Then A-u5  
     point_in = True 0X-2).nu  
     Exit Function )/AvWDKvO  
  End If Jqj6L993e  
   If ppx = p3x And ppy = p3y Then ykeUS zz2  
     point_in = True -U $pW(~  
     Exit Function B<&_lG0sS  
  End If '9dtIW6E  
     E!<$J^  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) &aQ)x  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 2"'8x?.V  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) C
4uR5U  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) Pb;`'<*U  
    sum = aob + boc + cod + doa H7=z%Y9y  
    If 360.01 > sum And sum > 359.99 Then S}f<@-16P  
       point_in = True /#=J`*m_  
    Else C
941@I  
       point_in = False -8jqC6mQ  
    End If D` X6'PP  
End Function

'得到点半径,得到交点坐标函数 mO> M=2A  
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() =ol][)Bd  
    '求得中心点坐标 ncr-i!Jjk  
Dim tt As String hF7mJ\  
Dim rt(3) As Single TkoXzG8yE<  
    '判断是否平行 I{I [N &N  
   acx = p3x - p1x
Nt-SCLDM  
   acy = p3y - p1y vaOL6=[#:g  
   bdx = p4x - p2x j/pQSlV  
   bdy = p4y - p2y z]|[VM?4L  
   If acx * bdy = acy * bdx Then b
[;3KmUB  
      rt(0) = 0 gtGKV  
      Exit Function X/Rx]}[   
   Else &:#8ol(n5b  
      '判断斜率存在否 l_-n&(N2<[  
      If p1x = p3x And p2x <> p4x Then cEjdImAzU  
         tt = "ac_n_bd_y" n{r#K_  
      ElseIf p1x <> p3x And p2x = p4x Then y]_8. 0zM  
         tt = "ac_y_bd_n" MxEAs}MDv  
      ElseIf p1x <> p3x And p2x <> p4x Then U hhmG+  
         tt = "ac_y_bd_y" f}Tr$r  
      End If 1 "7#|=1/  
    Select Case tt v@uaf=x-  
         Case "ac_n_bd_y" 0P40K  
            'bd线段方程 cu`J2vm3  
            k_bd = bdy / bdx H8]^f=  
            b_bd = p2y - k_bd * p2x ,Z7Z!.TY!  
            p_x = p1x _xgVuJ  
            p_y = k_bd * p_x + b_bd lO:{tV  
         Case "ac_y_bd_n" *F*jA$aY  
            'ac线段方程 +Z<Q^5w@  
            k_ac = acy / acx '
 VEr4&  
            b_ac = p1y - k_ac * p1x NVqC|uEAF  
            p_x = p2x kok^4VV  
            p_y = k_ac * p_x + b_ac Qr%Jm{_o  
        Case "ac_y_bd_y" 8{Eo8L'V  
           'ac，bd线段都要求 kF,\bM  
           k_ac = acy / acx ou^nzm  
           b_ac = p1y - k_ac * p1x {Y:ZY+  
           k_bd = bdy / bdx G+X[R^RD  
           b_bd = p2y - k_bd * p2x ?g;ZbD  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) o$`kpr  
           p_y = k_ac * p_x + b_ac jJ"EGFa8  
        End Select k-pEBhOH  
      rt(1) = p_x +aw>p_\  
      rt(2) = p_y 53t-'K0l  
     m_"p$m;  
'计算最大半径 MR_bq_)  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) iQ{&&>V%  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) GP[r^Z  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) JD{MdhhV  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ,ANK3n\  
Dim bb(5) As Single 4JZHjf0M6  
  bb(1) = rr1 Kxl,] |e>  
  bb(2) = rr2 V}|v!h[O8  
  bb(3) = rr3 {rvbo1t  
  bb(4) = rr4 uo4$rf7  
  nb = rr1 #>:(#^Uu  
For i = 1 To 4 [)SR$/A  
    If nb <= bb(i) Then 7ITl3>  
       nb = bb(i) d$_q=ywc  
    End If x]R(
twi  
Next i ?S&w0}R  
    rt(0) = Sqr(nb) U7"BlT!V\  
    rr = rt() @\T;PTD-  
  End If >GznG[Ku  
         (HaKF7Jsi  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  -AjH}A[!  

~x|aoozL  
有热压工艺方面的人才或者资料分享下； j8G
Y`f#  
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 H8@8MFz\  

高手真多！

楼主威武霸气.