[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： ?9ScKN  
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关键点说几个： ->`R[k  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） (x140_TH~  
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 h7J4 p  
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 T4h&ly5 f  

以下是几个重要的函数： 5#Et.P'  
1.判断点在区域中函数 [WO>}rGw4  
2.计算夹角函数 q+W*?a)  
3.转置函数 lf}%^od~6  
4.得到区域中心点，及区域半径函数 Y@limkN:  
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） zj2l&)N  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 qqSFy>`P  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single KN".0WU  
   cax = x2 - x1 2X6L'!=  
   cay = y2 - y1 C=`MzZbJ  
   cbx = x2 - x3 <ToRPx&E  
   cby = y2 - y3 9](RZ6A+o  
   mo_jj = cax * cbx + cay * cby -ju}I  
   mo_ca = Sqr(cax * cax + cay * cay) B:#9   
   mo_cb = Sqr(cbx * cbx + cby * cby) }X~"RQf9  
   cos_acb = mo_jj / (mo_ca * mo_cb) t^"8 v3
'h  
   'ff_cos = cos_acb vfdTGM`3  
   If cos_acb >= 1 Then c{[lT2yxU  
   nn = 0 1!Afq}|  
   ElseIf cos_acb <= -1 Then Kon|TeC>d  
   nn = 3.14159265258979 g9gi7.'0  
   Else q,>4#J[2;s  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) sf8F h  
   End If *+_+ZDU  
   'ff_angle = nn ,$Xhwr  
   ff_angle = nn * 180 / 3.14159265258979 :H>0/^Mg0  
End Function

'判断点在区域内函数 %|'VucLx  
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 e*M-y C  
Dim aob, boc, cod, doa, sum As Single sBLOrbo  
  If ppx = p1x And ppy = p1y Then t"P:}ps{?  
     point_in = True 5em*9Ko  
     Exit Function MzE1he1  
  End If BH0s` K"  
  If ppx = p2x And ppy = p2y Then /6:qmh2  
     point_in = True 8wMwS6s:  
     Exit Function A=r8_.@2@  
  End If #]r'?GN  
   If ppx = p3x And ppy = p3y Then \k5 sdHmI[  
     point_in = True E_\V^  
     Exit Function f([d/  
  End If GOD{?#
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     y7x*:xR[  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) r9n:[A&HE  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) *gOUpbtXa  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ydMSL25<+  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) .$o A~  
    sum = aob + boc + cod + doa Ll, U>yo  
    If 360.01 > sum And sum > 359.99 Then [DvQk?,t  
       point_in = True pO)5NbU  
    Else 8khIy-9-'  
       point_in = False r?/!VO-*N  
    End If ~.CmiG.7  
End Function

'得到点半径,得到交点坐标函数 klnk{R.>|  
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() .-)kIFMi  
    '求得中心点坐标 /7x1Z*Hg  
Dim tt As String Hyi'z
1  
Dim rt(3) As Single +'wO:E1( w  
    '判断是否平行 sgRWjrc/  
   acx = p3x - p1x CZf38$6X  
   acy = p3y - p1y @@cc
/S  
   bdx = p4x - p2x *MQ`&;Qa,  
   bdy = p4y - p2y LCW}1H:Q  
   If acx * bdy = acy * bdx Then 8RQv  
      rt(0) = 0 f{2I2kJr  
      Exit Function =MT'e,T  
   Else ,c&gw tdl  
      '判断斜率存在否 1x8wQ/p|  
      If p1x = p3x And p2x <> p4x Then U+zntB  
         tt = "ac_n_bd_y" qfjUJ/  
      ElseIf p1x <> p3x And p2x = p4x Then r1 b"ta  
         tt = "ac_y_bd_n" FIUQQQ\3  
      ElseIf p1x <> p3x And p2x <> p4x Then eJeL{`NS  
         tt = "ac_y_bd_y" d.HcO^  
      End If T3I{D@+0  
    Select Case tt wN

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         Case "ac_n_bd_y" Ss_}@p ^  
            'bd线段方程 .A0fI"
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            k_bd = bdy / bdx e^;%w#tEqI  
            b_bd = p2y - k_bd * p2x 1 J}ML}h)  
            p_x = p1x zO@>)@~  
            p_y = k_bd * p_x + b_bd AH_qZTv0{Q  
         Case "ac_y_bd_n" F|@\IVEB]  
            'ac线段方程 Vcnc=ct  
            k_ac = acy / acx v7\rW{~Jd&  
            b_ac = p1y - k_ac * p1x
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            p_x = p2x zRb
Y]dW  
            p_y = k_ac * p_x + b_ac `YqXF=-  
        Case "ac_y_bd_y" pw`'q(ad  
           'ac，bd线段都要求 Z{gm4YV  
           k_ac = acy / acx nxNHf3   
           b_ac = p1y - k_ac * p1x =3!o_  
           k_bd = bdy / bdx =T\=,B  
           b_bd = p2y - k_bd * p2x 7D1$cmtH  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) SlwQ_F"4L  
           p_y = k_ac * p_x + b_ac Dt{WRe\#
 
        End Select g@T}h[  
      rt(1) = p_x (4Nj3x o  
      rt(2) = p_y E^Q J50  
     gA
% A})  
'计算最大半径 fI1 9p Q  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ZCViZWo  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) p_X{'=SQ1  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Y B,c=Wx  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) aOS,%J^?  
Dim bb(5) As Single zWH)\>X59  
  bb(1) = rr1 -m@PqJF^  
  bb(2) = rr2 WIuYSt)h  
  bb(3) = rr3 r-yUWIr S  
  bb(4) = rr4 ~X3x-nAt  
  nb = rr1 &FuL{YL  
For i = 1 To 4 >239SyC-,  
    If nb <= bb(i) Then n1PBpM9!  
       nb = bb(i) H5V>d  
    End If _ Yc"{d3S  
Next i !zllvtK4  
    rt(0) = Sqr(nb) r7L.W
  
    rr = rt() cpALs1j:  
  End If \P")Eh =d  
         U|VL+9#hd  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  6XF Ufi+  

Sx'oa$J  
有热压工艺方面的人才或者资料分享下； I`X!M!dB)  
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 grzmW4Cw  

高手真多！

楼主威武霸气.