[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： CBgFB-!qpe  
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关键点说几个： cqU/Y_%l'  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） h"%,eW|^  
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 zYl+BM-j,6  
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 ,;-cz-,  

以下是几个重要的函数： ^ZZ@!Udy  
1.判断点在区域中函数 Z-r0 D  
2.计算夹角函数 !QzMeN;D  
3.转置函数 j1C0LP8  
4.得到区域中心点，及区域半径函数 bsS|!KT  
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） 5;%xqdD  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 S)1:*>@  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single W;j)ux7jMY  
   cax = x2 - x1 U%6lYna{M#  
   cay = y2 - y1 RB 0j!H:  
   cbx = x2 - x3 Ts *'f  
   cby = y2 - y3 ku8Z;ONeH  
   mo_jj = cax * cbx + cay * cby &]A1 _dy  
   mo_ca = Sqr(cax * cax + cay * cay) k$m
X81  
   mo_cb = Sqr(cbx * cbx + cby * cby) 0R{R=r]  
   cos_acb = mo_jj / (mo_ca * mo_cb) o`]FH_  
   'ff_cos = cos_acb +c2>j8e6  
   If cos_acb >= 1 Then VY26Cf"  
   nn = 0 ?9M+fi  
   ElseIf cos_acb <= -1 Then 6#-; ,2i  
   nn = 3.14159265258979 EG=>F1&M  
   Else )4O`%9=M&  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) M%LwC/h:,  
   End If NWX%0PGZ  
   'ff_angle = nn {nWtNyJpS  
   ff_angle = nn * 180 / 3.14159265258979 ph.:~n>z  
End Function

'判断点在区域内函数 ,l"2MXD  
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 BuO J0$  
Dim aob, boc, cod, doa, sum As Single  D-EM  
  If ppx = p1x And ppy = p1y Then )O'<jwp$  
     point_in = True D($UbT-v  
     Exit Function 66;O3g'  
  End If Q|r1.  
  If ppx = p2x And ppy = p2y Then _Xe< JJvq  
     point_in = True +OP'/  
     Exit Function %Q01EjRes  
  End If ?XrTZ{5'  
   If ppx = p3x And ppy = p3y Then vCr$miZ  
     point_in = True )^xmy6k  
     Exit Function 5Wjp_^!e  
  End If ;hp; Rd  
     tV%\Jk),  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ~UFsiVpL  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) wYM{x!D  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Hc3/`.nt  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) Unk+@$E&  
    sum = aob + boc + cod + doa `&
DiM@Sm  
    If 360.01 > sum And sum > 359.99 Then z<XS"4l?W  
       point_in = True 1@
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    Else <\NXCUqDpo  
       point_in = False !9Ni[8&Fg0  
    End If \}c50}#0  
End Function

'得到点半径,得到交点坐标函数 Cl=ExpX/O  
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() o^J&c_U\3'  
    '求得中心点坐标 L@uKE jR  
Dim tt As String s)=7tHoqB)  
Dim rt(3) As Single P40eK0e6  
    '判断是否平行 <ZEll[0L  
   acx = p3x - p1x M3;B]iRQD  
   acy = p3y - p1y 3Q;l*xu  
   bdx = p4x - p2x efm<bJB2  
   bdy = p4y - p2y 1Zzw|@#>o  
   If acx * bdy = acy * bdx Then s6IuM )x  
      rt(0) = 0 MR: {Ps&,  
      Exit Function dDn:^)  
   Else $tJJ >"  
      '判断斜率存在否 ^%.<(:k[L  
      If p1x = p3x And p2x <> p4x Then DO; 2)ZQ%  
         tt = "ac_n_bd_y" w0SgF/"@  
      ElseIf p1x <> p3x And p2x = p4x Then 2sH5<5G'  
         tt = "ac_y_bd_n" |\ L2q/u  
      ElseIf p1x <> p3x And p2x <> p4x Then wq#3f#3V  
         tt = "ac_y_bd_y"  (w fZ!  
      End If 64cmv}d_  
    Select Case tt #(G&%I A|;  
         Case "ac_n_bd_y" Q2uE_w`B  
            'bd线段方程 1-fz5
64  
            k_bd = bdy / bdx TUt
)]"h<  
            b_bd = p2y - k_bd * p2x =T`-h"E~@  
            p_x = p1x dE~ns ,+  
            p_y = k_bd * p_x + b_bd u""=9>0  
         Case "ac_y_bd_n" 0v?,:]A0E  
            'ac线段方程  ?auiq  
            k_ac = acy / acx 8jk*N  
            b_ac = p1y - k_ac * p1x bC|~N0b  
            p_x = p2x 7Fx8&Z  
            p_y = k_ac * p_x + b_ac ;K!Or  
        Case "ac_y_bd_y" pOXEM1"2A  
           'ac，bd线段都要求 *W
l{2&  
           k_ac = acy / acx |9h[Q[m  
           b_ac = p1y - k_ac * p1x jEadVM9  
           k_bd = bdy / bdx &}ow-u9c3  
           b_bd = p2y - k_bd * p2x ,??|R`S  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) O(VV-n7U  
           p_y = k_ac * p_x + b_ac MvCBgLN  
        End Select s.U p<Rw  
      rt(1) = p_x m,b<b91  
      rt(2) = p_y /(w5S',EL  
     ()Z$j,2  
'计算最大半径 w~`P\i@  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Yp8$0KK  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) $uqlJG#`  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) n9%rjS$  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) %k~=iDk@  
Dim bb(5) As Single 3 V<8  
  bb(1) = rr1 h ? M0@Z  
  bb(2) = rr2 u|C9[(  
  bb(3) = rr3 MD,-<X)Qy  
  bb(4) = rr4 /"U<0jot  
  nb = rr1 20qT1!ju  
For i = 1 To 4 C^a~)r.h  
    If nb <= bb(i) Then ]5/C"  
       nb = bb(i) <Aa%Uwpc  
    End If Z-p_hNb  
Next i px*MOHq K  
    rt(0) = Sqr(nb) @'QBrE  
    rr = rt() mEGMe@37  
  End If iR9iI!+;N  
         -(jcsqDk  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  s{gdTG6v`  

4B) prQ3  
有热压工艺方面的人才或者资料分享下； t/HE@xPxI5  
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 'peFT[1>(  

高手真多！

楼主威武霸气.