[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： 1(%>`=R8  
oxMUW<gYd  
FM9X}%5nu9  

关键点说几个： J7'f@X~nM  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） aE7u5PM  
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 ?~aZ#%*i8  
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 <2)s<S.;  

以下是几个重要的函数： %6NO0 F^  
1.判断点在区域中函数 /OQK/ t63  
2.计算夹角函数 \!+-4,CbZY  
3.转置函数 vix&E`0
yD  
4.得到区域中心点，及区域半径函数 5l41Q  
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） 6X@mPj[/  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 hc-lzYS  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single I2TD.wuIW  
   cax = x2 - x1 |h5kg<Zgo  
   cay = y2 - y1 9pWi.J  
   cbx = x2 - x3 [RAj3Fr0  
   cby = y2 - y3 M[ x_#m|  
   mo_jj = cax * cbx + cay * cby F\>oxttS1
 
   mo_ca = Sqr(cax * cax + cay * cay) ds- yif6  
   mo_cb = Sqr(cbx * cbx + cby * cby) [NYj.#,oR  
   cos_acb = mo_jj / (mo_ca * mo_cb) QJx9I_  
   'ff_cos = cos_acb ZhH+D`9  
   If cos_acb >= 1 Then f?,-j>[.=f  
   nn = 0 TE3*ktB{N
 
   ElseIf cos_acb <= -1 Then pG/ NuImA  
   nn = 3.14159265258979 '@'B>7C#  
   Else BjM+0[HC  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) :/+>e IE  
   End If }l~]b3@qu  
   'ff_angle = nn as>:\hjP##  
   ff_angle = nn * 180 / 3.14159265258979
$bk>kbl P  
End Function

'判断点在区域内函数 NdZ)[f:2  
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 C1 W>/?XC  
Dim aob, boc, cod, doa, sum As Single H ZPcd_(  
  If ppx = p1x And ppy = p1y Then XTV0Le\
f  
     point_in = True ~L~]QN\3  
     Exit Function 29%=:*R$  
  End If ]3}feU+  
  If ppx = p2x And ppy = p2y Then ~]&B>q  
     point_in = True @d&g/ccMxd  
     Exit Function TZ'aNcGg  
  End If /J;;|X#P  
   If ppx = p3x And ppy = p3y Then +kM\ D~D1  
     point_in = True !}ilN 1>  
     Exit Function )!i!3  
  End If Jz0K}^Dj[  
     0C]4~F x~  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) l8^y]M  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) CJp-Y}fGEA  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) :<|Z.4}kJb  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) D
i+4Eb  
    sum = aob + boc + cod + doa `$at9  
    If 360.01 > sum And sum > 359.99 Then wazP,9W?  
       point_in = True F99A;M8(  
    Else 8 }-7{  
       point_in = False Je^Y&
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    End If 0(8gQ 2n  
End Function

'得到点半径,得到交点坐标函数 ^>^\CP]  
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() <1 S+'  
    '求得中心点坐标 j7}lF?cJ2  
Dim tt As String T`?n,'!(  
Dim rt(3) As Single .fEwk  
    '判断是否平行 #EG?9T  
   acx = p3x - p1x tq&Yek>C  
   acy = p3y - p1y n'?4.tb  
   bdx = p4x - p2x j;iL&eo>  
   bdy = p4y - p2y akC>s8tqlA  
   If acx * bdy = acy * bdx Then Y 9i][  
      rt(0) = 0 MtUY?O.P2  
      Exit Function 6.'$EtH  
   Else y"-{$N  
      '判断斜率存在否 q`^3ov^</  
      If p1x = p3x And p2x <> p4x Then =/Wu'gG)  
         tt = "ac_n_bd_y"  P?J kP  
      ElseIf p1x <> p3x And p2x = p4x Then o8{<qn|  
         tt = "ac_y_bd_n" | ]# +v@  
      ElseIf p1x <> p3x And p2x <> p4x Then C8.W5P[U  
         tt = "ac_y_bd_y" >rw"Rd'  
      End If N@()F&e
  
    Select Case tt r?^"65=  
         Case "ac_n_bd_y" Pbe7SRdr^  
            'bd线段方程 ?E7=:h(@t  
            k_bd = bdy / bdx 9|=nV|R'6  
            b_bd = p2y - k_bd * p2x {y6C0A*  
            p_x = p1x dE [Ol   
            p_y = k_bd * p_x + b_bd h<Wg
3o  
         Case "ac_y_bd_n" =/9<(Tt%m  
            'ac线段方程 o1k#."wHr  
            k_ac = acy / acx p=B?/Sqa  
            b_ac = p1y - k_ac * p1x -k{Jp/-D  
            p_x = p2x @9vvR7{P  
            p_y = k_ac * p_x + b_ac oLS7`+b$  
        Case "ac_y_bd_y" <d"Gg/@a  
           'ac，bd线段都要求 XWtiwf'K  
           k_ac = acy / acx 7Z0/(V.-  
           b_ac = p1y - k_ac * p1x SF< [FM%1  
           k_bd = bdy / bdx $XGtS$  
           b_bd = p2y - k_bd * p2x 3dG4pl~  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) jdM=SBy7q  
           p_y = k_ac * p_x + b_ac Dm%%e o  
        End Select x=Mm6}
/  
      rt(1) = p_x i&&qbZt  
      rt(2) = p_y J3B.-XJ+n  
     rzu s  
'计算最大半径 Spgg+;9  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) e4[) WNR  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ZEGd4_ux  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ]:et~pfW  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 3cC }'j  
Dim bb(5) As Single RmOyGSO  
  bb(1) = rr1 GN%(9N'W  
  bb(2) = rr2 O2v.  
  bb(3) = rr3 z-@-O  
  bb(4) = rr4 t5)J;0/  
  nb = rr1 ~/|zlu*jpc  
For i = 1 To 4 nwf7M#3d  
    If nb <= bb(i) Then K@r*;T  
       nb = bb(i) GuO`jz F  
    End If (q~0XE/ a  
Next i lIh[|]  
    rt(0) = Sqr(nb) wL2XNdo}<  
    rr = rt() 0=;YnsY  
  End If kG^dqqn6  
         xvDI 4x&  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  59!)j>f  

UR3$B%i  
有热压工艺方面的人才或者资料分享下； 9 5 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 'G#SLqZy  

高手真多！

楼主威武霸气.