[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： EA=EcUf'  
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关键点说几个： "}ZUa~7  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） me`|i-   
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 9|5>?'CqP  
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 227 Z6#CF!  

以下是几个重要的函数： Hr/3nq}.  
1.判断点在区域中函数 #1VejeTi  
2.计算夹角函数 aX,ux9#  
3.转置函数 Y1s3>`  
4.得到区域中心点，及区域半径函数 ;UoXj+Z  
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） yaWHGre  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 n&;-rj^qq  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ppXt8G3%x  
   cax = x2 - x1 * u{CnH  
   cay = y2 - y1 xjO((JC  
   cbx = x2 - x3 ," ~4l&  
   cby = y2 - y3 &XH{,fv$  
   mo_jj = cax * cbx + cay * cby (14J~MDB  
   mo_ca = Sqr(cax * cax + cay * cay) uU#
7SX(uu  
   mo_cb = Sqr(cbx * cbx + cby * cby) FEqR7  
   cos_acb = mo_jj / (mo_ca * mo_cb) .BqSE  
   'ff_cos = cos_acb BBUXoz  
   If cos_acb >= 1 Then 69K*]s  
   nn = 0 e
lw}(l<F  
   ElseIf cos_acb <= -1 Then o])2_e5  
   nn = 3.14159265258979 (%^Bp\.02!  
   Else 2%oo.?!R  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 53jtwklA  
   End If ~n$e  
   'ff_angle = nn RiNKUk{-  
   ff_angle = nn * 180 / 3.14159265258979 PN@[k:5(  
End Function

'判断点在区域内函数 a|\ZC\(xI  
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 %}%vey  
Dim aob, boc, cod, doa, sum As Single ;}=[( eqA  
  If ppx = p1x And ppy = p1y Then 8LouCv(>  
     point_in = True T-L;iH~0  
     Exit Function hc4W|Ofj  
  End If |K%nVcR=  
  If ppx = p2x And ppy = p2y Then ,'69RL?-Wg  
     point_in = True )^o7%KX  
     Exit Function Q<F-l.q   
  End If &v
#*  
   If ppx = p3x And ppy = p3y Then 5I(gP  
     point_in = True ;v?!Pml2k  
     Exit Function D{!NTr  
  End If B[R1XpB7  
     ,:!dqonn  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) X(;,-7Jw  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) TLk=HGw  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) !Xbr7:UPN1  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) Y:0SrB!\  
    sum = aob + boc + cod + doa fEl,jA  
    If 360.01 > sum And sum > 359.99 Then fem>WPvG  
       point_in = True -$]Tn#`Fb  
    Else MOIH%lpe
 
       point_in = False yn[^!GuJ_  
    End If uW8LG\Z>D5  
End Function

'得到点半径,得到交点坐标函数 ^fLePsmd  
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() ^+JpI*,  
    '求得中心点坐标 DFz,>DM;  
Dim tt As String 0wLu*K5$4E  
Dim rt(3) As Single (=H%VXQH  
    '判断是否平行 aIv>X@U}  
   acx = p3x - p1x }'mBqn  
   acy = p3y - p1y +oZq~2?*S6  
   bdx = p4x - p2x Xz'pZ*Hr$v  
   bdy = p4y - p2y `5[d9z/6  
   If acx * bdy = acy * bdx Then 2z7+@!w/  
      rt(0) = 0 /3!
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      Exit Function 3hOiHO ;  
   Else #cqia0.H  
      '判断斜率存在否 <|NP!eMsw8  
      If p1x = p3x And p2x <> p4x Then a{7>7%[  
         tt = "ac_n_bd_y" &i8AB{OU  
      ElseIf p1x <> p3x And p2x = p4x Then ,c@^u6a  
         tt = "ac_y_bd_n" {q%wr*  
      ElseIf p1x <> p3x And p2x <> p4x Then  $&96qsr  
         tt = "ac_y_bd_y" P"J(O<(1-:  
      End If #7IM#tc@  
    Select Case tt (bxSN@hp2  
         Case "ac_n_bd_y" M1^?_;B  
            'bd线段方程 ~n$VCLa  
            k_bd = bdy / bdx [2UjY^\;T  
            b_bd = p2y - k_bd * p2x #YM5P  
            p_x = p1x ~a:0Q{>a  
            p_y = k_bd * p_x + b_bd ')w:`8Tl  
         Case "ac_y_bd_n" 0*MY4r|-  
            'ac线段方程 Fu0 dYN  
            k_ac = acy / acx 5Xu2MY=  
            b_ac = p1y - k_ac * p1x %vvA'WG  
            p_x = p2x $DZ\61  
            p_y = k_ac * p_x + b_ac \0iF <0oy  
        Case "ac_y_bd_y" a$p?r3y  
           'ac，bd线段都要求 IWvLt  
           k_ac = acy / acx D9M<>Xz)  
           b_ac = p1y - k_ac * p1x V,<3uQD9a  
           k_bd = bdy / bdx lCBb0k2  
           b_bd = p2y - k_bd * p2x D.zEE-cGyb  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) W3s>+yU  
           p_y = k_ac * p_x + b_ac tCAh?nR  
        End Select -t_t3aU|  
      rt(1) = p_x =7@N'xX  
      rt(2) = p_y Yy6Mkw7X  
     =m.Lw  
'计算最大半径 5F{NPKaQ  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y)  ")MjR1p  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) i>YD_#w  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) M=$ qus  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) +:3K?G-  
Dim bb(5) As Single o(GXv3L  
  bb(1) = rr1 nFU'D
Z  
  bb(2) = rr2 @:\Iw"P  
  bb(3) = rr3 >58N P1[k  
  bb(4) = rr4 1*\JqCR  
  nb = rr1 ~0"(C#l9  
For i = 1 To 4 @:u>  
    If nb <= bb(i) Then q(sEN!^L`  
       nb = bb(i) 1zwk0={x-%  
    End If v#1}( hb  
Next i (3Hz=k_  
    rt(0) = Sqr(nb) o2
  
    rr = rt() (- `h8M  
  End If A)9OkL
rc  
         r(;sX  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Qqm$Jl!  

\eH`{Z'.x5  
有热压工艺方面的人才或者资料分享下； _;zIH5 H  
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 +"yt/9AO  

高手真多！

楼主威武霸气.