[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： .`+~mQ Wn  
c|9g=DjK  
+[uh);vD`G  

关键点说几个： ">1wPq&  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） uIO,9> ee  
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 YB4 ZI  
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 P(7el  

以下是几个重要的函数： G5t7KI  
1.判断点在区域中函数 ,WOCG2h  
2.计算夹角函数 3Q62H+MC  
3.转置函数 ,.*Df)+  
4.得到区域中心点，及区域半径函数 YzZj=]\`b  
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） ,{q#U3  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 C7m/<  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 0H +nVR  
   cax = x2 - x1 dPpQCxf  
   cay = y2 - y1 l{8O'4;  
   cbx = x2 - x3 C,>n  
   cby = y2 - y3 u?SwGXi~8  
   mo_jj = cax * cbx + cay * cby Y9#dAI[Gce  
   mo_ca = Sqr(cax * cax + cay * cay) !0zcS7&P  
   mo_cb = Sqr(cbx * cbx + cby * cby) 3)=ix. wW  
   cos_acb = mo_jj / (mo_ca * mo_cb) O_2o/  
   'ff_cos = cos_acb 58#nYt  
   If cos_acb >= 1 Then Z D"*fr  
   nn = 0 lbovwj  
   ElseIf cos_acb <= -1 Then UJL'4 t/  
   nn = 3.14159265258979 \^y~w~g?  
   Else xh#_K@8  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) C "@>NC_  
   End If OMjPC_  
   'ff_angle = nn b+whZtNk7  
   ff_angle = nn * 180 / 3.14159265258979 .0U[nt6  
End Function

'判断点在区域内函数 7vPGb:y  
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 [=cbzmX[  
Dim aob, boc, cod, doa, sum As Single 7W4m&+  
  If ppx = p1x And ppy = p1y Then dVLrA`'P*  
     point_in = True k??CXW  
     Exit Function d<OdQvW.  
  End If K`X'Hg#_P2  
  If ppx = p2x And ppy = p2y Then @zw&-b:qI  
     point_in = True h|'|n/F  
     Exit Function @ kv~2m  
  End If 9CwtBil<#g  
   If ppx = p3x And ppy = p3y Then /03Wst  
     point_in = True j<Pw0?~s6  
     Exit Function QRl+7V  
  End If U_aI!`WXd  
     ;QG8@ms|  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) oIj/V|ByK  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) /u]#dX5  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Kt]vTn7!9  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) P$h) Y  
    sum = aob + boc + cod + doa L*6<h  
    If 360.01 > sum And sum > 359.99 Then
CUC]-]8  
       point_in = True c@]G;>o  
    Else xo ^|d3  
       point_in = False }>,%El/  
    End If 5\JV}  
End Function

'得到点半径,得到交点坐标函数 NX;{L#lQ  
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() 8"ZcKxDk  
    '求得中心点坐标 ,@N.v?p>  
Dim tt As String ~Lu,jLKL=[  
Dim rt(3) As Single $'#}f?  
    '判断是否平行 hD,^mru  
   acx = p3x - p1x I(j{D>v  
   acy = p3y - p1y v33[Rk'
 
   bdx = p4x - p2x q9^.f9-  
   bdy = p4y - p2y 0,__{?!  
   If acx * bdy = acy * bdx Then 'rfs
rZ?  
      rt(0) = 0 Qd?S~3XT  
      Exit Function f e^s`dsG  
   Else Mj19;nc0I  
      '判断斜率存在否 FS?1O"_  
      If p1x = p3x And p2x <> p4x Then >E,/|K*  
         tt = "ac_n_bd_y" bgInIe
 
      ElseIf p1x <> p3x And p2x = p4x Then m<MN.R7  
         tt = "ac_y_bd_n" EW)r/Av:,  
      ElseIf p1x <> p3x And p2x <> p4x Then [a^<2V!vMn  
         tt = "ac_y_bd_y" 3],(oQq^  
      End If 4h}\Kl  
    Select Case tt 5rA>2<\pQ  
         Case "ac_n_bd_y" hSh^A5 /  
            'bd线段方程 >Mm.MNU  
            k_bd = bdy / bdx 98{n6$\  
            b_bd = p2y - k_bd * p2x $K|2k7  
            p_x = p1x
n2F*a  
            p_y = k_bd * p_x + b_bd RD:LNl<0sh  
         Case "ac_y_bd_n" :c[T@[  
            'ac线段方程 ,~K4+ t_  
            k_ac = acy / acx d;r,?/C  
            b_ac = p1y - k_ac * p1x 8h|~>v  
            p_x = p2x G%%F6)W  
            p_y = k_ac * p_x + b_ac 6H|T )  
        Case "ac_y_bd_y" ZU9RvtbKB  
           'ac，bd线段都要求 Mw;^`ZxT  
           k_ac = acy / acx " M&zW&  
           b_ac = p1y - k_ac * p1x "KY]2v.  
           k_bd = bdy / bdx %Si3LQf  
           b_bd = p2y - k_bd * p2x U[@B63];0  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) K~8!Gh{h]  
           p_y = k_ac * p_x + b_ac MB.LHIo  
        End Select lg jY\?  
      rt(1) = p_x "1ZVuI  
      rt(2) = p_y ,#.^2O9-^  
     v[m1R'  
'计算最大半径 23zR0z(L  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) :\1vy5 _  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y)  ck`$ `  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) baf@"P9@\A  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) {JcMJZ3  
Dim bb(5) As Single KH[Oqd  
  bb(1) = rr1 E{}eYU
 
  bb(2) = rr2 00A2[gO9  
  bb(3) = rr3 mgEZiAV?  
  bb(4) = rr4 ).HnK  
  nb = rr1 w:9n/[  
For i = 1 To 4 79M`?xm  
    If nb <= bb(i) Then JG'&anbm  
       nb = bb(i) -.vNb!=  
    End If 4+0:(=>[%  
Next i Qhn>aeW,  
    rt(0) = Sqr(nb) 4f,%@s)zn  
    rr = rt() MCfDR#a  
  End If {E>(%vD  
         ?~~,?Uxw!  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  rXlJ
W]i  

I='S).  
有热压工艺方面的人才或者资料分享下； =E''$b?Em  
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 StJ&YYdD  

高手真多！

楼主威武霸气.