[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： A/fM30  
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关键点说几个： ,OP\^  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） d>c`hQ(V  
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 E @Rb+8},"  
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 (Kg)cc[B`  

以下是几个重要的函数： 77 Z:!J|  
1.判断点在区域中函数 AU
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2.计算夹角函数 &g0r#
K  
3.转置函数 d>r]xXB6  
4.得到区域中心点，及区域半径函数 nvc(<Ovw  
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） Z*v`kl  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 w7\ \m9  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single d*@K5?O.  
   cax = x2 - x1 5
*Dh#FRp  
   cay = y2 - y1 0a,B&o1  
   cbx = x2 - x3 z$(`{ o%a  
   cby = y2 - y3 o+- 0`!yj  
   mo_jj = cax * cbx + cay * cby "=$uv  
   mo_ca = Sqr(cax * cax + cay * cay) Sg\+al7  
   mo_cb = Sqr(cbx * cbx + cby * cby) Le,;)N
d  
   cos_acb = mo_jj / (mo_ca * mo_cb) kp6&e  
   'ff_cos = cos_acb C0ORBp  
   If cos_acb >= 1 Then r*FAUb`bG  
   nn = 0 PMQlJ&  
   ElseIf cos_acb <= -1 Then ~{{7y]3M-  
   nn = 3.14159265258979 ITz+O=I4R]  
   Else ~;t/VsgGW  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 8LY^
>.  
   End If <uo@k'   
   'ff_angle = nn ^pqJz^PO.  
   ff_angle = nn * 180 / 3.14159265258979 FB3}M)G>M  
End Function

'判断点在区域内函数 .kB!',v\  
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 B'bOK`p  
Dim aob, boc, cod, doa, sum As Single x]IJ;  
  If ppx = p1x And ppy = p1y Then TK0W=&6#A  
     point_in = True 1R7tnR@[u  
     Exit Function |w5,%#AeO$  
  End If Zb:Z,O(vn  
  If ppx = p2x And ppy = p2y Then F(Je$c/J|~  
     point_in = True Q07&7SH_  
     Exit Function 1jpft3*x  
  End If 3u< ntx ><  
   If ppx = p3x And ppy = p3y Then Vd'=Fe;eB  
     point_in = True _ER. AKY  
     Exit Function ]Qe"S>,?`  
  End If m>*~tP  
     1\g r ;b  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ARG8\qU  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ]zn3nhBI  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) by\Sq}  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) JEF;Q  
    sum = aob + boc + cod + doa o'8nQ Tao  
    If 360.01 > sum And sum > 359.99 Then 3$.#\*s_4  
       point_in = True T`9nY!  
    Else  GInw7  
       point_in = False Qj
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    End If e0j4t-lL  
End Function

'得到点半径,得到交点坐标函数 qw>vu7/z  
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() 96P&+  
    '求得中心点坐标 a6O <t;&  
Dim tt As String M?GkHJ%!  
Dim rt(3) As Single *2rc
Y  
    '判断是否平行 e m0 hTxb  
   acx = p3x - p1x :,g]Om^  
   acy = p3y - p1y  nF<xJs  
   bdx = p4x - p2x Bf6i{`!G  
   bdy = p4y - p2y 9X +dp  
   If acx * bdy = acy * bdx Then ),[@NK&=  
      rt(0) = 0 /+8VW;4|I  
      Exit Function H8=:LF  
   Else e`q*'u1?  
      '判断斜率存在否 Y*\N{6$2  
      If p1x = p3x And p2x <> p4x Then 9v?@2sOoE  
         tt = "ac_n_bd_y" P}qpy\/(4  
      ElseIf p1x <> p3x And p2x = p4x Then #TC}paIpj  
         tt = "ac_y_bd_n" @65xn)CD{  
      ElseIf p1x <> p3x And p2x <> p4x Then FSAX,Y  
         tt = "ac_y_bd_y" E@n~ @|10  
      End If +!!G0Zj/  
    Select Case tt m7C!}l]9  
         Case "ac_n_bd_y" ezCJq`b  
            'bd线段方程 }p?67y/  
            k_bd = bdy / bdx z Tz_"NI  
            b_bd = p2y - k_bd * p2x VaGQre  
            p_x = p1x 0:<Y@#L  
            p_y = k_bd * p_x + b_bd ZoSyc--Bv  
         Case "ac_y_bd_n" E_DQ.!U!o  
            'ac线段方程 \7>*ULP  
            k_ac = acy / acx R5%CK_  
            b_ac = p1y - k_ac * p1x x[&<e<6  
            p_x = p2x
q=D8 Nz  
            p_y = k_ac * p_x + b_ac `JpFqZ'58  
        Case "ac_y_bd_y" XWQ
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           'ac，bd线段都要求 8iOHav4  
           k_ac = acy / acx  _cj=}!I  
           b_ac = p1y - k_ac * p1x dJQK|/  
           k_bd = bdy / bdx aq8./^  
           b_bd = p2y - k_bd * p2x 5u;//Cm  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 2f@Cy+W'[  
           p_y = k_ac * p_x + b_ac D7JrGaF{  
        End Select FQ1B%u|  
      rt(1) = p_x D GcpYA.7'  
      rt(2) = p_y s%`l>#H  
     w,vnpdT  
'计算最大半径 (dD7"zQ  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ,Xfu?Yan  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) -m=A1~|7  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) czpu^BT;;T  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) SZ9DT  
Dim bb(5) As Single v[{7\Hh
a  
  bb(1) = rr1 {FKr^)g  
  bb(2) = rr2 oYTLC@98}  
  bb(3) = rr3 'j, 
([  
  bb(4) = rr4 Qg~w 3~  
  nb = rr1 C$~ly=@  
For i = 1 To 4 l!Xj UnRF  
    If nb <= bb(i) Then AG9DJ{T  
       nb = bb(i) 5X+`aB  
    End If {d;z3AB  
Next i tP*Kt'4W  
    rt(0) = Sqr(nb) Ao}<a1f  
    rr = rt() fuv{2[NV  
  End If ;*j 
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         =<p=?16 x  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  l VD{Y`)  

3>7{Q_5  
有热压工艺方面的人才或者资料分享下； *s 4Ym
  
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 \\:%++}J  

高手真多！

楼主威武霸气.