[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： XD_P\z  
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关键点说几个： /7UovKKbz  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Y(#d8o}}#  
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 ?`vM#)  
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 1jZDw~  

以下是几个重要的函数： P-E'cb%ub  
1.判断点在区域中函数 5CH-:|(;=  
2.计算夹角函数 oP|pOs\$p  
3.转置函数 eB(S+p?  
4.得到区域中心点，及区域半径函数 (!XYH@Mz<w  
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） <tu[cA>  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 T;4gcJPn"M  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single =}%#$  
   cax = x2 - x1 Zgy2Pot  
   cay = y2 - y1 +}`O^#<qLX  
   cbx = x2 - x3 }0Kqy;  
   cby = y2 - y3 |ZST Y}RXA  
   mo_jj = cax * cbx + cay * cby TQ
5MKqR$  
   mo_ca = Sqr(cax * cax + cay * cay) XW&8T"q
7  
   mo_cb = Sqr(cbx * cbx + cby * cby) b68G&z>   
   cos_acb = mo_jj / (mo_ca * mo_cb) [c KI
0  
   'ff_cos = cos_acb u]]5p[|S  
   If cos_acb >= 1 Then -NflaV~  
   nn = 0 l_YdIUl  
   ElseIf cos_acb <= -1 Then cvs"WX3  
   nn = 3.14159265258979 v'bd.eqw  
   Else "zeJ4f  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) WDH[kJ  
   End If 08K.\3  
   'ff_angle = nn FB=  
   ff_angle = nn * 180 / 3.14159265258979 ~*cY& 9  
End Function

'判断点在区域内函数 21/a3Mlx#  
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 "-j@GCme  
Dim aob, boc, cod, doa, sum As Single m[xf./@f{  
  If ppx = p1x And ppy = p1y Then U+RCQTo  
     point_in = True A^r [_dyZ  
     Exit Function /nMqEHCyg  
  End If 7AtXG^lK  
  If ppx = p2x And ppy = p2y Then ^?^|Y?f2P?  
     point_in = True HDW\S#  
     Exit Function 3]kAb`9[K2  
  End If G$x["  
   If ppx = p3x And ppy = p3y Then `.sIZku  
     point_in = True X$9D0;L  
     Exit Function T`'
3Cp$q  
  End If 1TxhEXB  
     l~6SR  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) XUqE5[O%  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) bU4+PA@$  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) #;*ai\6>vD  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) nxh/&%  
    sum = aob + boc + cod + doa 73sAZa|  
    If 360.01 > sum And sum > 359.99 Then =<FZ
{4  
       point_in = True A$"$`)P!  
    Else LWb}) #E  
       point_in = False Dgq[g_+l  
    End If ,YMdXYu`s  
End Function

'得到点半径,得到交点坐标函数 ?L#SnnE  
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() MdoWqpC  
    '求得中心点坐标 eg~^wi  
Dim tt As String owY_cDzrH  
Dim rt(3) As Single LYq2A,wm$  
    '判断是否平行 "KTnX#<0  
   acx = p3x - p1x o(SJuZC/U  
   acy = p3y - p1y +U/"F|M  
   bdx = p4x - p2x zUgkY`]:BJ  
   bdy = p4y - p2y
l'{goyf  
   If acx * bdy = acy * bdx Then 0_zSQn9c  
      rt(0) = 0 uy-Ncy  
      Exit Function .W+4sax:  
   Else n]{}C.C=  
      '判断斜率存在否 B)cb}.N:  
      If p1x = p3x And p2x <> p4x Then m}'@S+k^  
         tt = "ac_n_bd_y" j83Y'VJJC  
      ElseIf p1x <> p3x And p2x = p4x Then YK+Z0ry  
         tt = "ac_y_bd_n" W6/p
-e5y  
      ElseIf p1x <> p3x And p2x <> p4x Then "u]Fl+c  
         tt = "ac_y_bd_y" BHE =Zo  
      End If rHdP4:n  
    Select Case tt ds[Z=_Ll  
         Case "ac_n_bd_y" (X7yNIPfA  
            'bd线段方程 {}C7VS1  
            k_bd = bdy / bdx lRK?%~  
            b_bd = p2y - k_bd * p2x `V_/Cz_}D  
            p_x = p1x ,H(vD,54g  
            p_y = k_bd * p_x + b_bd Cwa0!y5%  
         Case "ac_y_bd_n" iR5soIR  
            'ac线段方程 o%>nu  
            k_ac = acy / acx d@4=XSj  
            b_ac = p1y - k_ac * p1x -^ ayJ73  
            p_x = p2x I%|s  
            p_y = k_ac * p_x + b_ac VQ;- dCV  
        Case "ac_y_bd_y" &J@ZF<Ib  
           'ac，bd线段都要求 #YVDOR{z  
           k_ac = acy / acx knZd}?I*  
           b_ac = p1y - k_ac * p1x VzM@DM]=~  
           k_bd = bdy / bdx &>4$ [m>n  
           b_bd = p2y - k_bd * p2x uOUw8  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) A"ph!* i{  
           p_y = k_ac * p_x + b_ac os ud  
        End Select I%*Zj,>  
      rt(1) = p_x A_ z:^9  
      rt(2) = p_y ct/THq  
     +W
s}a  
'计算最大半径 l>P~M50D?{  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Jpnp'  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) DYk->)   
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) iZ;jn8  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) (X'K)*G#  
Dim bb(5) As Single .shI%'V  
  bb(1) = rr1 2p.+C35c=j  
  bb(2) = rr2 ",GC\#^v  
  bb(3) = rr3 ]@]"bF!Dn  
  bb(4) = rr4 @,$HqJ  
  nb = rr1 iv`-)UsE  
For i = 1 To 4 sJYX[  
    If nb <= bb(i) Then 4[j) $!l`  
       nb = bb(i) zMg^2{0L  
    End If g@i 4H[k  
Next i ?&^l8gE  
    rt(0) = Sqr(nb) ~i {)J  
    rr = rt() t~#+--(  
  End If *Y>'v%  
         Jq@LZ2^  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Nsy.!,!c  

xae
7#d0  
有热压工艺方面的人才或者资料分享下； jA'+>`@  
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 SqLKF<tY]/  

高手真多！

楼主威武霸气.