[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： 38hAguZX  
8>sToNRNe  
X)K3X:~L+  

关键点说几个： `.FvuwP  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） +##b}?S%  
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 n~#%>C
7  
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 W:7oGZ>4  

以下是几个重要的函数： _U.D*f<3)  
1.判断点在区域中函数 ag-\(i;K]  
2.计算夹角函数 1Z +3=$P  
3.转置函数 *N .f_s  
4.得到区域中心点，及区域半径函数 Wb] ha1$  
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） $T
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6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 (bxSN@hp2  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single .$/Su3]K/  
   cax = x2 - x1 O+Fu zCWj  
   cay = y2 - y1 + RX{  
   cbx = x2 - x3 Wc4F'}s  
   cby = y2 - y3 1M
H[-=[Q  
   mo_jj = cax * cbx + cay * cby ,YYyFMC7S  
   mo_ca = Sqr(cax * cax + cay * cay) m]8rljo  
   mo_cb = Sqr(cbx * cbx + cby * cby) (c ?OcwTH  
   cos_acb = mo_jj / (mo_ca * mo_cb) <FIc!  
   'ff_cos = cos_acb c(.2D  
   If cos_acb >= 1 Then c rPEr  
   nn = 0 66*/"dBwm  
   ElseIf cos_acb <= -1 Then >(s)S[\  
   nn = 3.14159265258979 N/QTf1$  
   Else vT V'D&x2  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Y '&&1R  
   End If C9[Jr)QX  
   'ff_angle = nn { as#lHn  
   ff_angle = nn * 180 / 3.14159265258979 e`%U}_[d  
End Function

'判断点在区域内函数 ;uj&j1  
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 /EF0~iy  
Dim aob, boc, cod, doa, sum As Single duCxYhh|  
  If ppx = p1x And ppy = p1y Then 45` i  
     point_in = True .UF](  
     Exit Function 0|kkwZVPn  
  End If qjQR0MC  
  If ppx = p2x And ppy = p2y Then @
sUYjB  
     point_in = True T8( \:v
 
     Exit Function *Y"Kbn6  
  End If ^'j? {@  
   If ppx = p3x And ppy = p3y Then kR2kV"-l  
     point_in = True `)Z"||8K  
     Exit Function ocCq$%Ka  
  End If fYrC;&n  
     ?.tnaE  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) e 4-  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) tHAr9
 
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Bw _^"e8X  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) l"70|~  
    sum = aob + boc + cod + doa $+CKy>  
    If 360.01 > sum And sum > 359.99 Then ~d]X@(G&  
       point_in = True {cmY`to  
    Else S B2R  
       point_in = False Ws%@SK  
    End If DX>Yf}  
End Function

'得到点半径,得到交点坐标函数 ncw)VH;_-  
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() r<< ]41  
    '求得中心点坐标 n h
T%_se4  
Dim tt As String G8bc\]  
Dim rt(3) As Single z~8`xn,  
    '判断是否平行 -rg >y!L  
   acx = p3x - p1x :wWPEhK  
   acy = p3y - p1y N@}5Fnk-  
   bdx = p4x - p2x p;#@#>h  
   bdy = p4y - p2y X#v6v)c  
   If acx * bdy = acy * bdx Then Fpe>|"&  
      rt(0) = 0 CMu/n]?c  
      Exit Function `Hlv*" w$  
   Else fkKk/M>1  
      '判断斜率存在否 'PO+P~|oa&  
      If p1x = p3x And p2x <> p4x Then :pz`bFJk  
         tt = "ac_n_bd_y" ENoGV;WG  
      ElseIf p1x <> p3x And p2x = p4x Then olA 1,8  
         tt = "ac_y_bd_n" UdGa#rcNW  
      ElseIf p1x <> p3x And p2x <> p4x Then 1u`{yl*+?  
         tt = "ac_y_bd_y" 'xK ,|U  
      End If ''p7!V?  
    Select Case tt {>EM=ZZfg  
         Case "ac_n_bd_y" K/T4T\  
            'bd线段方程 JWB3;,S  
            k_bd = bdy / bdx O@9<7@h+Nl  
            b_bd = p2y - k_bd * p2x 76IjM4&a  
            p_x = p1x "}|&eBH^<  
            p_y = k_bd * p_x + b_bd FaA'%P@  
         Case "ac_y_bd_n" ][D/=-  
            'ac线段方程 F7!q18ew  
            k_ac = acy / acx i!yu%>:M  
            b_ac = p1y - k_ac * p1x w'i8yl bZ  
            p_x = p2x KU;d[Z@g  
            p_y = k_ac * p_x + b_ac +HAd=DU  
        Case "ac_y_bd_y" OYYk[r  
           'ac，bd线段都要求 Ca]V%
g(  
           k_ac = acy / acx 7Be\^%  
           b_ac = p1y - k_ac * p1x $bo,m2)  
           k_bd = bdy / bdx $!LL  
           b_bd = p2y - k_bd * p2x ]=ubl!0=:  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) zWA~0l.2  
           p_y = k_ac * p_x + b_ac PI-o)U$Ehv  
        End Select sKCfI]  
      rt(1) = p_x ]ykMh  
      rt(2) = p_y |g`:K0BI  
     bVgmjt2&>  
'计算最大半径 ]
r&dWF  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) gH u!~l  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) -|cB7P  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ^J-"8%  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) h\<;N*Xi  
Dim bb(5) As Single )O:T\{7+  
  bb(1) = rr1 h0c&}kM  
  bb(2) = rr2 `VL<pqPP  
  bb(3) = rr3 b0:5i<"w6  
  bb(4) = rr4 0}4FwcCr\  
  nb = rr1 zNh$d;(O$^  
For i = 1 To 4 H_&z-g`  
    If nb <= bb(i) Then BpR#3CfW  
       nb = bb(i) 1)N~0)dO  
    End If b!l/O2 G  
Next i a? <Ar#)j  
    rt(0) = Sqr(nb) 2;`F`}BA  
    rr = rt() %CaF-m=Pq  
  End If 0s2@z5bfX  
         <8sy*A?0z  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  /{7we$+,p  

].,TSnb  
有热压工艺方面的人才或者资料分享下； Pln*?o  
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 R$xkcg2(  

高手真多！

楼主威武霸气.