[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： huh6t !  
4\8+9b\9"  
x"~8*V'0  

关键点说几个： s %j_H  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） .6+Z^,3  
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 7QiIiWqIWC  
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 vqDu(6!2  

以下是几个重要的函数： I9_RlAd  
1.判断点在区域中函数 5q3JI  
2.计算夹角函数 saBVgSd  
3.转置函数 ` Mjj@[  
4.得到区域中心点，及区域半径函数 |"ls\ 7  
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） \XCe22x]  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 x kx^%3dV  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single N.,X<G.H  
   cax = x2 - x1 {f3YsM;]C  
   cay = y2 - y1 at#ja_ hd  
   cbx = x2 - x3 0L2F[TN  
   cby = y2 - y3 vyNxT*,[K  
   mo_jj = cax * cbx + cay * cby x9UX!Z5*>  
   mo_ca = Sqr(cax * cax + cay * cay) X`kk]8=  
   mo_cb = Sqr(cbx * cbx + cby * cby) 3`t#UY).F  
   cos_acb = mo_jj / (mo_ca * mo_cb) cLpYW7vZ[  
   'ff_cos = cos_acb [+2[`K c]  
   If cos_acb >= 1 Then 4[m`#   
   nn = 0 Ra)
3+M!x  
   ElseIf cos_acb <= -1 Then HJ=
:8:  
   nn = 3.14159265258979 !Q2d(H>   
   Else \=VtHu92=  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) -;s|  
   End If Qp)v?k ]  
   'ff_angle = nn ^S4d:-.3  
   ff_angle = nn * 180 / 3.14159265258979 tU}h~&M  
End Function

'判断点在区域内函数 |HiE@  
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 b6cBg  
Dim aob, boc, cod, doa, sum As Single [owWiN4`s  
  If ppx = p1x And ppy = p1y Then Ec!"O3%!M^  
     point_in = True f',Op1o  
     Exit Function =_.l8IYX$%  
  End If >{q]&}^U  
  If ppx = p2x And ppy = p2y Then !j9t*2m[  
     point_in = True NW~N}5T  
     Exit Function 7-bd9uVK  
  End If |kyX3~  
   If ppx = p3x And ppy = p3y Then {{$Nqn,pH  
     point_in = True >8~.wXyoC  
     Exit Function dPW#C5
dm  
  End If m~iXl,r  
     C.WX.Je  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) du<tGsy  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) H[6:_**?o  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) MU`1LHg  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) t|w_i-&b,  
    sum = aob + boc + cod + doa O*hDbM2QQw  
    If 360.01 > sum And sum > 359.99 Then <wk!hTmW  
       point_in = True hi_NOx  
    Else k$
4y9{  
       point_in = False )X1{  
    End If Yz<3JRw  
End Function

'得到点半径,得到交点坐标函数 "|x^|n8i  
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() OSRp0G20k\  
    '求得中心点坐标 Y4J3-wK5  
Dim tt As String
h=W:^@G  
Dim rt(3) As Single h1j!IG  
    '判断是否平行 ,1y@Z 5wy  
   acx = p3x - p1x 1auIR/=-  
   acy = p3y - p1y W\>fh&!)  
   bdx = p4x - p2x Q)~aiI0  
   bdy = p4y - p2y qLO4#CKCL6  
   If acx * bdy = acy * bdx Then ]3D0R;  
      rt(0) = 0 BGvre'67  
      Exit Function B7VH<;Z  
   Else =rMUov h  
      '判断斜率存在否 pd:WEI ,  
      If p1x = p3x And p2x <> p4x Then piJu+tUy  
         tt = "ac_n_bd_y" r)Ma3FL0;  
      ElseIf p1x <> p3x And p2x = p4x Then G0CW}e@)  
         tt = "ac_y_bd_n" [u =+3b  
      ElseIf p1x <> p3x And p2x <> p4x Then &xU[E!2H%  
         tt = "ac_y_bd_y" b(,M1.[qt  
      End If a4mn*,  
    Select Case tt U'k*_g
 
         Case "ac_n_bd_y" x,'(5*  
            'bd线段方程 BnX0G1|#  
            k_bd = bdy / bdx T]^62(So  
            b_bd = p2y - k_bd * p2x XPavReGf  
            p_x = p1x gt\E`HB8E  
            p_y = k_bd * p_x + b_bd GF"hx`zyJ  
         Case "ac_y_bd_n" j%Y#(Q>  
            'ac线段方程 Yz'K]M_Dq  
            k_ac = acy / acx KWq+PeB5TS  
            b_ac = p1y - k_ac * p1x g!FuY/%+
 
            p_x = p2x 5-FQMXgThc  
            p_y = k_ac * p_x + b_ac )\1QJ$-M&  
        Case "ac_y_bd_y" 1gE
 [v  
           'ac，bd线段都要求 zUt'QH7E.  
           k_ac = acy / acx ]MqMQLG0t  
           b_ac = p1y - k_ac * p1x 9Uh"iMB  
           k_bd = bdy / bdx +=>,Pto<  
           b_bd = p2y - k_bd * p2x ntu5{L'8  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) )1Y{Q Y}l  
           p_y = k_ac * p_x + b_ac ,L|%"K]yM  
        End Select Ja|5 @  
      rt(1) = p_x y|jl[pyg)  
      rt(2) = p_y \q>bs|2  
     %h hf
U6[  
'计算最大半径 ;d@#XIS&-(  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) =
h
-U  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) -{KQr1{5UM  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) MH =%-S   
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) _no/F2>!/n  
Dim bb(5) As Single On8v//=&  
  bb(1) = rr1 k6;?)~.  
  bb(2) = rr2 TeMHm?1^  
  bb(3) = rr3 @T@<_ ?)  
  bb(4) = rr4 55G+;  
  nb = rr1 jqz ux[6{  
For i = 1 To 4 v|Pv 03%?7  
    If nb <= bb(i) Then ;/bewivNJ  
       nb = bb(i) #{6{TFx\  
    End If uY{|szC^2  
Next i 'I`&Yo~c9  
    rt(0) = Sqr(nb) ]dF ,:8  
    rr = rt() ?Lx24*5%  
  End If 0^v`T%|fTX  
         # ncRb  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ~Cbc<[}  

iky|Tp  
有热压工艺方面的人才或者资料分享下； &)2i[X  
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 U] ~$g}!)  

高手真多！

楼主威武霸气.