[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： f m.-*`ax  
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关键点说几个： E6|!G  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） JS% &ipm  
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 ?I&ha-."  
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 <_-&{Pv  

以下是几个重要的函数： xcr=AhqM  
1.判断点在区域中函数 Xm&L@2V  
2.计算夹角函数 oB;EP  
3.转置函数 aG;6^$H~  
4.得到区域中心点，及区域半径函数 ]uO8  
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） \^2%v~  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 4Z>hP]7  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single xevG)m  
   cax = x2 - x1 z:<mgp&/<  
   cay = y2 - y1 {?m;D
Yv  
   cbx = x2 - x3 Dv?'(.z  
   cby = y2 - y3 Z#YkAQHv5  
   mo_jj = cax * cbx + cay * cby O~
F/{:U  
   mo_ca = Sqr(cax * cax + cay * cay) '0x`Oh&PK  
   mo_cb = Sqr(cbx * cbx + cby * cby) T0n=nC}<  
   cos_acb = mo_jj / (mo_ca * mo_cb) 9{@#tx  
   'ff_cos = cos_acb ""l_&3oz  
   If cos_acb >= 1 Then bA\TuB  
   nn = 0 q#
wg2  
   ElseIf cos_acb <= -1 Then 9'F-D  
   nn = 3.14159265258979 )iadu  
   Else -IhFPjQ  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) .QOQqU*2I  
   End If d&'z0]mOe  
   'ff_angle = nn $,"{g<*k;  
   ff_angle = nn * 180 / 3.14159265258979 U*F
|Z4{W  
End Function

'判断点在区域内函数 OD<0,r0f,  
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 ! {lcF%  
Dim aob, boc, cod, doa, sum As Single I7b(fc-r  
  If ppx = p1x And ppy = p1y Then [Z6]$$!#2  
     point_in = True eIc~J!?<&V  
     Exit Function
>kOca  
  End If q:sDNj)R\  
  If ppx = p2x And ppy = p2y Then Y W_E,A>h  
     point_in = True {V%ZOdg9  
     Exit Function "6rZn_H/|  
  End If X&DuX %x0  
   If ppx = p3x And ppy = p3y Then n m(yFX?=  
     point_in = True _ b}\h,Ky  
     Exit Function <b"ynoM.
A  
  End If ut%t`Y( ]  
     \W;~[-"#  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) VaZ+TE  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) U~Aw=h5SD  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) eU_|.2  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) Yu=4j9e_mG  
    sum = aob + boc + cod + doa ; iQ@wOL]  
    If 360.01 > sum And sum > 359.99 Then , M$*c  
       point_in = True Us.yKAHPV  
    Else [9UKVnX.V  
       point_in = False )a,-Hc:Vz  
    End If 0$l=ME(  
End Function

'得到点半径,得到交点坐标函数 6"WR}S0o  
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() I^/Ugu  
    '求得中心点坐标 D2|-\vJ>  
Dim tt As String $1oU^VY  
Dim rt(3) As Single OTd=(dwh  
    '判断是否平行 o*97Nbjn  
   acx = p3x - p1x eJ)Bs20Q  
   acy = p3y - p1y Vi`+2%4  
   bdx = p4x - p2x lJoMJS;S]}  
   bdy = p4y - p2y F0:Fv;  
   If acx * bdy = acy * bdx Then
5b9_6L6  
      rt(0) = 0 &q1(v3cOO  
      Exit Function Cca( oV  
   Else T :CsYj1  
      '判断斜率存在否 +xRja(d6  
      If p1x = p3x And p2x <> p4x Then i\2MphS  
         tt = "ac_n_bd_y" AQ. Y-'\t  
      ElseIf p1x <> p3x And p2x = p4x Then tr7FV1p  
         tt = "ac_y_bd_n" lW'6rat  
      ElseIf p1x <> p3x And p2x <> p4x Then ZA>hN3fE'  
         tt = "ac_y_bd_y" oLk>|J  
      End If e%x$Cb:znn  
    Select Case tt V'pNo&O=  
         Case "ac_n_bd_y" Jjik~[<q:  
            'bd线段方程 $;7?w-.  
            k_bd = bdy / bdx 'mpY2|]\$  
            b_bd = p2y - k_bd * p2x +OK.[ji?  
            p_x = p1x N::_JH?^=  
            p_y = k_bd * p_x + b_bd L':;Vv~-  
         Case "ac_y_bd_n" EiI3$y3;  
            'ac线段方程 s['F?GWg  
            k_ac = acy / acx En+4@BC  
            b_ac = p1y - k_ac * p1x *kgbcUf8  
            p_x = p2x ?v#t{e0eQ  
            p_y = k_ac * p_x + b_ac dGQxGt1  
        Case "ac_y_bd_y" 1W8[ RET  
           'ac，bd线段都要求 e+bpbyV_#  
           k_ac = acy / acx s!Y>\3rMW  
           b_ac = p1y - k_ac * p1x 6VolTy@(x  
           k_bd = bdy / bdx TuwH?{ FzK  
           b_bd = p2y - k_bd * p2x U/yYQZ\)  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) w|>:mQnU  
           p_y = k_ac * p_x + b_ac ko im@B  
        End Select ?)Z~H,Q(z  
      rt(1) = p_x )8ctNpQt  
      rt(2) = p_y |k)h' ?  
     T#J]%IDd  
'计算最大半径 INW8Q`[F  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) [:a;|t  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ?F*gFW_k  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 8l>/ZZ.NXi  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) WXNJc  
Dim bb(5) As Single nE]R0|4h  
  bb(1) = rr1 y_qFX
d  
  bb(2) = rr2 T'\lntN  
  bb(3) = rr3 #$K\:V+ 4  
  bb(4) = rr4 6aCAz2/  
  nb = rr1 ; z:}OD  
For i = 1 To 4 ]. 1[H~5N  
    If nb <= bb(i) Then Km
Em  
       nb = bb(i) hc>hNC:a  
    End If  p(Y'fd}  
Next i mY(~94{d  
    rt(0) = Sqr(nb) *`ji2+4Sjw  
    rr = rt() g[-'0d\1  
  End If M=26@ n  
         M^mS#<!y  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  hJkIFyQ{j  

w6qx  
有热压工艺方面的人才或者资料分享下； @2L+"=u#  
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 ](aXZ<,  

高手真多！

楼主威武霸气.