[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： 9cOx@c+/  
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描述:请输入描述

图片:2.jpg

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关键点说几个： +3HPA#A  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Hir(6Bt  
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 K
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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 gA"<MI'y  

以下是几个重要的函数： *G9 [j$  
1.判断点在区域中函数 RSFJu\0}N  
2.计算夹角函数 -Y2&A$cM  
3.转置函数 3f,u}1npa*  
4.得到区域中心点，及区域半径函数 >eu `!8  
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） s8yCC#H"  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 4 ;^g MI9  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single v<%]XHN  
   cax = x2 - x1 2h5tBEOX.s  
   cay = y2 - y1 R&#[6 r(h  
   cbx = x2 - x3 ~DK F%}E  
   cby = y2 - y3 /5jKX 5r  
   mo_jj = cax * cbx + cay * cby jjYM3LQcdP  
   mo_ca = Sqr(cax * cax + cay * cay) G^ K*+  
   mo_cb = Sqr(cbx * cbx + cby * cby) 8>2&h  
   cos_acb = mo_jj / (mo_ca * mo_cb) p[_Yi0U  
   'ff_cos = cos_acb m\1VF\  
   If cos_acb >= 1 Then l#p}
{  
   nn = 0 HUK"OH  
   ElseIf cos_acb <= -1 Then 8g-P_[>  
   nn = 3.14159265258979 ]DGGcUk7  
   Else 3.B4(9:>,  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) SHytyd  
   End If 'n>EEQyp'  
   'ff_angle = nn #"|"cYi,  
   ff_angle = nn * 180 / 3.14159265258979  7N!tp,?  
End Function

'判断点在区域内函数 =DGn,i9  
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 Cc@=?  
Dim aob, boc, cod, doa, sum As Single qPL^zM+  
  If ppx = p1x And ppy = p1y Then [0h* &  
     point_in = True w:ORmR.p  
     Exit Function FLVbkW-G.  
  End If s*aH`M7^0  
  If ppx = p2x And ppy = p2y Then kA;xAb+U3  
     point_in = True e 4 p*51ra  
     Exit Function A Z]P+v  
  End If &G0l&8pa  
   If ppx = p3x And ppy = p3y Then vsu@PuqH  
     point_in = True tniPEmeS  
     Exit Function )GB3=@  
  End If fui4

@  
     <WZ1-  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) unCt4uX^  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) *?EO n-  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) aQ32p4C  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) z0\;m{TH  
    sum = aob + boc + cod + doa e} sc]MTM  
    If 360.01 > sum And sum > 359.99 Then EC^Ev|PB\u  
       point_in = True 7(yXsVq  
    Else _8,vk-,'  
       point_in = False fO[Rf_  
    End If |h#D
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End Function

'得到点半径,得到交点坐标函数 zF[3%qZE:T  
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() l-DGy#h+z  
    '求得中心点坐标 U@o2gjGN  
Dim tt As String nu
\  
Dim rt(3) As Single &(5^vw<0  
    '判断是否平行 XD_P\z  
   acx = p3x - p1x s[0prm5.  
   acy = p3y - p1y {B'Gm]4  
   bdx = p4x - p2x ,Hik(22  
   bdy = p4y - p2y aHBByH  
   If acx * bdy = acy * bdx Then W /~||s  
      rt(0) = 0 OvyB<r  
      Exit Function [(D}%+2   
   Else *Gk<"pEeS  
      '判断斜率存在否 9s;!iDFn  
      If p1x = p3x And p2x <> p4x Then gp#bQ  
         tt = "ac_n_bd_y" q#mFN/.(+  
      ElseIf p1x <> p3x And p2x = p4x Then bqZ?uvc3  
         tt = "ac_y_bd_n" "@c';".|  
      ElseIf p1x <> p3x And p2x <> p4x Then
ef;&Y>/  
         tt = "ac_y_bd_y" r6O7&Me<  
      End If qB+:#Yrx/  
    Select Case tt az:~{f*-  
         Case "ac_n_bd_y" Y(#d8o}}#  
            'bd线段方程 (5f5P84x  
            k_bd = bdy / bdx 1jZDw~  
            b_bd = p2y - k_bd * p2x "}]GQt< F  
            p_x = p1x /o<}]]YBF  
            p_y = k_bd * p_x + b_bd Z-? Iip{  
         Case "ac_y_bd_n" ZaukMEq  
            'ac线段方程 9E->;0-  
            k_ac = acy / acx C }h<ldlY  
            b_ac = p1y - k_ac * p1x [I+)Ak5  
            p_x = p2x *sc0,'0  
            p_y = k_ac * p_x + b_ac 4%',scn  
        Case "ac_y_bd_y" o+if%3  
           'ac，bd线段都要求 ,p[\fT($]  
           k_ac = acy / acx J{GFb  
           b_ac = p1y - k_ac * p1x I:uQB!  
           k_bd = bdy / bdx '-nuH;r  
           b_bd = p2y - k_bd * p2x giPhW>  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 4'}_qAT  
           p_y = k_ac * p_x + b_ac S5*~r@8h  
        End Select Z?.p%*>`T=  
      rt(1) = p_x j
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      rt(2) = p_y 6g~o3  
     :oon}_MdRd  
'计算最大半径 HggR=>s  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 3zA8pI w  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ReHd~G9  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) v)C:E9!|  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) QC\,  
Dim bb(5) As Single "a0u-}/D  
  bb(1) = rr1 7{kpx$:_  
  bb(2) = rr2 bgzT3KZ  
  bb(3) = rr3 w{:Oa7_A  
  bb(4) = rr4 ZVL-o<6  
  nb = rr1 <u x*r#a!d  
For i = 1 To 4 ERX|cc  
    If nb <= bb(i) Then fo!Lp*'0  
       nb = bb(i) !q=Q~ea  
    End If ,/w852|ub  
Next i f@F^W YQm  
    rt(0) = Sqr(nb) Il&"=LooZ  
    rr = rt() z`xz~9a<  
  End If cvs"WX3  
         |4p<T!T  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  xo 'w+Av  

ieF 0<'iF  
有热压工艺方面的人才或者资料分享下； ,G/X"t ~  
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 <C`eZ}Qqv  

高手真多！

楼主威武霸气.