[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： ;hwzYXWF  
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图片:2.jpg

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关键点说几个： q\Rq!7(  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） DtWxr  
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 56DoO'  
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 BC! 6O/
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以下是几个重要的函数： ?^u^im  
1.判断点在区域中函数 \\:|Odd  
2.计算夹角函数 -\#lF?fzb  
3.转置函数 L0Y0&;y|R  
4.得到区域中心点，及区域半径函数 2q PhLCe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） sN~\+_  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 r37[)kJ  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single @gY\;[#.  
   cax = x2 - x1 8(f
:U@BS  
   cay = y2 - y1 8Pmdk1 ~  
   cbx = x2 - x3 ]~0}=,H$N  
   cby = y2 - y3 XNehPZYS  
   mo_jj = cax * cbx + cay * cby -Z0+oU(?YE  
   mo_ca = Sqr(cax * cax + cay * cay) n~.*1. P  
   mo_cb = Sqr(cbx * cbx + cby * cby) J?&l*_m;t  
   cos_acb = mo_jj / (mo_ca * mo_cb) i"r!w|j  
   'ff_cos = cos_acb }%TPYc  
   If cos_acb >= 1 Then 7 oQ[FdRn*  
   nn = 0 uO6{r v\  
   ElseIf cos_acb <= -1 Then Z=?aEU$7  
   nn = 3.14159265258979 -!e7L>w  
   Else `P}9i@C  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) W*N$'%  
   End If t2>fmQIQ  
   'ff_angle = nn 2%B'3>a  
   ff_angle = nn * 180 / 3.14159265258979 5/MKzoB  
End Function

'判断点在区域内函数 K/=|8+IDL  
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 -7 U|a/  
Dim aob, boc, cod, doa, sum As Single PcT?<HU  
  If ppx = p1x And ppy = p1y Then 9(4&KZpK  
     point_in = True $za8"T*I  
     Exit Function 5=|hC3h  
  End If *{ {b~$  
  If ppx = p2x And ppy = p2y Then Z?5V4F:f  
     point_in = True S!v(+|  
     Exit Function ,Wbwg  
  End If @#g<IBG=*  
   If ppx = p3x And ppy = p3y Then q 11IkDa
  
     point_in = True $D'-k]E[H  
     Exit Function Z;/$niY  
  End If EJ@p-}I!  
     Vw||!
d  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) @a:>
$t  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) VHJM*&5  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) f y:,_#  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) j)C,%Ol  
    sum = aob + boc + cod + doa l vMlL5t  
    If 360.01 > sum And sum > 359.99 Then *!s;"U  
       point_in = True w-wV3Q6X  
    Else eq(am%3~  
       point_in = False Qx;\USv  
    End If E:9"cxx  
End Function

'得到点半径,得到交点坐标函数 i;LXu%3\  
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() vVE2m=!v  
    '求得中心点坐标 :8CvRO*<  
Dim tt As String I)A`)5="5  
Dim rt(3) As Single %3NqSiMs  
    '判断是否平行 UfN&v >8f  
   acx = p3x - p1x [0"'T[ok  
   acy = p3y - p1y kY*rb_2j  
   bdx = p4x - p2x &?mD$Eo  
   bdy = p4y - p2y 8GvJ0Jq}U  
   If acx * bdy = acy * bdx Then rE}%KsZ  
      rt(0) = 0 9E>xIJ@J2T  
      Exit Function u%w`:v7Yo(  
   Else ne4Q#P  
      '判断斜率存在否 D6>HN
[D"  
      If p1x = p3x And p2x <> p4x Then e,t(q(L  
         tt = "ac_n_bd_y" U2bjFLd"  
      ElseIf p1x <> p3x And p2x = p4x Then (p2
K36,9m  
         tt = "ac_y_bd_n" S H!  
      ElseIf p1x <> p3x And p2x <> p4x Then 0NS<?p~_S  
         tt = "ac_y_bd_y" G6T_O  
      End If c-B cA  
    Select Case tt $0vb
^  
         Case "ac_n_bd_y" {zMU#=EC  
            'bd线段方程 E[/\7v\  
            k_bd = bdy / bdx 0aG ni|  
            b_bd = p2y - k_bd * p2x &*+'>UEe5  
            p_x = p1x &l!4mxwr`  
            p_y = k_bd * p_x + b_bd 3AU;>D^5  
         Case "ac_y_bd_n" _lamn}(x0  
            'ac线段方程 V5UF3'3;}  
            k_ac = acy / acx _f$^%?^  
            b_ac = p1y - k_ac * p1x _d5QbTe  
            p_x = p2x i\,-oO  
            p_y = k_ac * p_x + b_ac rJGf.qJJ  
        Case "ac_y_bd_y" KET2Ws[w  
           'ac，bd线段都要求 \O2Rhz  
           k_ac = acy / acx Mu+0
<>
 
           b_ac = p1y - k_ac * p1x '.:z&gSqx0  
           k_bd = bdy / bdx L7dd(^  
           b_bd = p2y - k_bd * p2x vX/T3WV  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) #ZB~x6i6  
           p_y = k_ac * p_x + b_ac kqFP)!37  
        End Select wB.&}p9p  
      rt(1) = p_x 9[<)WQe6M  
      rt(2) = p_y }H^+A77v  
     P)P*Xqr#:  
'计算最大半径 vSEuk}pk  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) U~:-roQ(\  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) |olA9mp|]  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) <0Xf9a8>  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ;lE%M  
Dim bb(5) As Single ,J+}rPe"sf  
  bb(1) = rr1 Zy`m!]G]80  
  bb(2) = rr2 LY%WD%pL  
  bb(3) = rr3 9Z4nAc
 
  bb(4) = rr4 ,Q  
  nb = rr1 8Vr%n2M  
For i = 1 To 4 3LOdjT J  
    If nb <= bb(i) Then )Y"+,$$>Y`  
       nb = bb(i) `sn^ysp  
    End If "&Y`+0S8  
Next i ;r<^a6B  
    rt(0) = Sqr(nb) X $jWo@  
    rr = rt() 6^]+[q}3  
  End If y [}.yyye  
         ,o86}6Ag  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  8SMxw~9$  

owVX*&b{  
有热压工艺方面的人才或者资料分享下； &l}^iP'%!  
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 2=*H 8'k  

高手真多！

楼主威武霸气.