[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： +l_$}UN  
-qRO}EF  
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关键点说几个： Y^f12%  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） LlG~aGhel  
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 ? /Z hu  
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 ;F<)BEXC<  

以下是几个重要的函数： 5K*-)F ]  
1.判断点在区域中函数 /aB9pD+%  
2.计算夹角函数 D0&{iZ(  
3.转置函数 {XNu4d9w(  
4.得到区域中心点，及区域半径函数 {L8(5  
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） dj76YK  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 LHWh-h(s  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single #+eV5%Si  
   cax = x2 - x1 >:`Y]6z  
   cay = y2 - y1 WiL~b =fT  
   cbx = x2 - x3 GJqSNi}  
   cby = y2 - y3 :LFwJ  
   mo_jj = cax * cbx + cay * cby w`VmN}pR  
   mo_ca = Sqr(cax * cax + cay * cay) 2'J.$ h3  
   mo_cb = Sqr(cbx * cbx + cby * cby) \?fl%r2  
   cos_acb = mo_jj / (mo_ca * mo_cb) ls6ywLP{  
   'ff_cos = cos_acb bct&ge7YX  
   If cos_acb >= 1 Then ? F fw'O  
   nn = 0 /BVNJNhz  
   ElseIf cos_acb <= -1 Then 9bXU!l[  
   nn = 3.14159265258979 ?kb\%pcK  
   Else D@Fa~O$75  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) =k`(!r2"#  
   End If N1(}3O  
   'ff_angle = nn v.v3HB8p  
   ff_angle = nn * 180 / 3.14159265258979 R< xxwjt  
End Function

'判断点在区域内函数 qm]ljut  
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 YQX>)'  
Dim aob, boc, cod, doa, sum As Single &"C1XM  
  If ppx = p1x And ppy = p1y Then n3b@6V1_  
     point_in = True w6Tb<ja  
     Exit Function (DKpJCx  
  End If -07(#>  
  If ppx = p2x And ppy = p2y Then ",8h>eEWK  
     point_in = True )vGRfFjw_  
     Exit Function <)n
  
  End If n7<<}wcV  
   If ppx = p3x And ppy = p3y Then 'A8T.BU  
     point_in = True NK#Dq&W+&  
     Exit Function sQihyq6U;  
  End If nNilTJ   
     Bdbw!zRR$  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) F/EHU?_EI  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) "l +Jx|h\  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) p6}
jCGJ  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 29Q5s$YD@  
    sum = aob + boc + cod + doa KI>7h.t  
    If 360.01 > sum And sum > 359.99 Then nVyb B~.=  
       point_in = True J;T_9  
    Else c@nl;u)n  
       point_in = False )If[pw@j  
    End If s:]rL&|  
End Function

'得到点半径,得到交点坐标函数 09%eaoW  
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() =v;-{oN!  
    '求得中心点坐标 \ I?;%  
Dim tt As String M$~h(3
  
Dim rt(3) As Single U.^)|IHW  
    '判断是否平行 WX\%FJ  
   acx = p3x - p1x |
[{;*wtv  
   acy = p3y - p1y '}rDmt~  
   bdx = p4x - p2x G0(c@FBK  
   bdy = p4y - p2y 5W{>5.Arx)  
   If acx * bdy = acy * bdx Then `jZX(H  
      rt(0) = 0
k Lv_P[I  
      Exit Function EhD|\WLx!  
   Else /t9w%Y  
      '判断斜率存在否 quKD\hL$  
      If p1x = p3x And p2x <> p4x Then pKH4?F  
         tt = "ac_n_bd_y" %cm5Z^B1"  
      ElseIf p1x <> p3x And p2x = p4x Then Y?5yzD:  
         tt = "ac_y_bd_n" #63/;o:l$  
      ElseIf p1x <> p3x And p2x <> p4x Then k]>k1Mi=  
         tt = "ac_y_bd_y" wl{p,[
]  
      End If Z?X$8o^Z  
    Select Case tt AQiP2`?  
         Case "ac_n_bd_y" |@@mq!>-  
            'bd线段方程 Z956S$
gS  
            k_bd = bdy / bdx "=".ne  
            b_bd = p2y - k_bd * p2x 5~44R@`  
            p_x = p1x _L=vK=,  
            p_y = k_bd * p_x + b_bd W?l .QQk  
         Case "ac_y_bd_n" -pD&@Wlwak  
            'ac线段方程 ROjjN W`W  
            k_ac = acy / acx zgRP!q<9tt  
            b_ac = p1y - k_ac * p1x KqSa"76R  
            p_x = p2x kK1qFe?]  
            p_y = k_ac * p_x + b_ac ~NcJLU!au  
        Case "ac_y_bd_y" (jm.vL&5j  
           'ac，bd线段都要求 Z~,.l  
           k_ac = acy / acx G4{qWa/  
           b_ac = p1y - k_ac * p1x <eh(~  
           k_bd = bdy / bdx GVfu_z?  
           b_bd = p2y - k_bd * p2x XOeh![eMX  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) C5WCRg5&  
           p_y = k_ac * p_x + b_ac z\E"={P&  
        End Select ^2A
F:
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      rt(1) = p_x c==Oio("  
      rt(2) = p_y V%0.%/<#5  
     ={b ]  
'计算最大半径 dq8 /^1P  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) b"Mq7&cf  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) #PrV)en  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) X<m%EXvV  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) &53#`WgJ  
Dim bb(5) As Single tT8jC:oVa  
  bb(1) = rr1 ^i8I 1@ =  
  bb(2) = rr2 kdUGmR0d  
  bb(3) = rr3 >b["T+  
  bb(4) = rr4  ft'iv  
  nb = rr1 Me}TW!GC  
For i = 1 To 4 L@z !,r,  
    If nb <= bb(i) Then YEQW:r_h.S  
       nb = bb(i) HEuM"2{DMM  
    End If v2n0[b0  
Next i gZjO
lp  
    rt(0) = Sqr(nb) uTU4Fn\$L  
    rr = rt() )T64(_TE  
  End If 87K)qsv8  
         FR}H$R7#  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ole|J  

f>r3$WKj  
有热压工艺方面的人才或者资料分享下； %)axGbZG;  
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 0zbLc%  

高手真多！

楼主威武霸气.