[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： ,j>A[e&.  
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图片:2.jpg

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关键点说几个： A:Pp;9wl  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） %MGbIMpY  
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 O W`yv  
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 UfIH!6Q  

以下是几个重要的函数： uflRW+-2  
1.判断点在区域中函数 ;|7]%Z}%  
2.计算夹角函数 Zpc R  
3.转置函数 R@zl?
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4.得到区域中心点，及区域半径函数 (jhDO7  
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） 0 ~K4vSa  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 )/uu~9SFd  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single KlOL5"3  
   cax = x2 - x1 o+-G@16  
   cay = y2 - y1 +2Xq+P  
   cbx = x2 - x3 jiAKV0lX W  
   cby = y2 - y3 !.\-l2f  
   mo_jj = cax * cbx + cay * cby #>)OLKP  
   mo_ca = Sqr(cax * cax + cay * cay) |Iq#Q3w  
   mo_cb = Sqr(cbx * cbx + cby * cby) FQ6jM~  
   cos_acb = mo_jj / (mo_ca * mo_cb) @ootKY`  
   'ff_cos = cos_acb #i6ZY^+ee  
   If cos_acb >= 1 Then N5m+r.<;  
   nn = 0 [OTZ"XQLI  
   ElseIf cos_acb <= -1 Then 2$S^3$k'  
   nn = 3.14159265258979 "WPFZw:9  
   Else PO1|l-v<Yq  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) m~$S]Wf  
   End If +,wCV2>\3  
   'ff_angle = nn N5]}m:"pk  
   ff_angle = nn * 180 / 3.14159265258979 R>|)-"b( `  
End Function

'判断点在区域内函数 (j*1sk  
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 cwK+{*ZH/
 
Dim aob, boc, cod, doa, sum As Single =A yDVWpE  
  If ppx = p1x And ppy = p1y Then *d%U]Hby,  
     point_in = True xW
hi>  
     Exit Function 97XGJ1HI  
  End If zLeId83>  
  If ppx = p2x And ppy = p2y Then vbn'CY]QU  
     point_in = True /d/Quro  
     Exit Function ;R#:? r;t  
  End If k~P{Rm;F  
   If ppx = p3x And ppy = p3y Then +0)zB;~7  
     point_in = True ? FlV<nE"J  
     Exit Function "@h 5 SF  
  End If \Gzo^w  
     ?M02|8-  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) [p 6#fG *  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 3aK/5)4|B  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 71$MhPvd<  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) pN]$|#%q(  
    sum = aob + boc + cod + doa @['4X1pqt  
    If 360.01 > sum And sum > 359.99 Then W;^bc*a_  
       point_in = True pbM"tr_A{  
    Else `/1Zy}cD  
       point_in = False vW\|% @hW,  
    End If NbDfD3 1GK  
End Function

'得到点半径,得到交点坐标函数 Q I.
*6-(  
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() _`Abz2s  
    '求得中心点坐标 0 CJ4]mYl  
Dim tt As String iN}BMd.U  
Dim rt(3) As Single 7%(|)
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    '判断是否平行 v7l4g&  
   acx = p3x - p1x O>![IH(L  
   acy = p3y - p1y j&S8x|5  
   bdx = p4x - p2x fGv`.T_d  
   bdy = p4y - p2y Q9~UL^bF  
   If acx * bdy = acy * bdx Then \sy;ca)[6g  
      rt(0) = 0 GW(-'V/  
      Exit Function }UzO_&Z#6  
   Else 1qs~[7{C1  
      '判断斜率存在否 >%"Q]p  
      If p1x = p3x And p2x <> p4x Then JMMsOA_]  
         tt = "ac_n_bd_y" o6} +5  
      ElseIf p1x <> p3x And p2x = p4x Then t?-7Z6  
         tt = "ac_y_bd_n" 6$'6x2,  
      ElseIf p1x <> p3x And p2x <> p4x Then `P`nqn  
         tt = "ac_y_bd_y" MRB>(}  
      End If N".-]bB  
    Select Case tt v!;E1  
         Case "ac_n_bd_y" (VPT% l6  
            'bd线段方程 O ).1>  
            k_bd = bdy / bdx \w 6%J77  
            b_bd = p2y - k_bd * p2x o3;u*f0rWn  
            p_x = p1x c-INVA)  
            p_y = k_bd * p_x + b_bd /WDz;,X  
         Case "ac_y_bd_n" C/P,W>8  
            'ac线段方程 x*#F|N4~',  
            k_ac = acy / acx lA4Bq  
            b_ac = p1y - k_ac * p1x 4*UoTE-g$  
            p_x = p2x y>S.B/d  
            p_y = k_ac * p_x + b_ac 3I_
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        Case "ac_y_bd_y" >4d2IO1\  
           'ac，bd线段都要求 t[6g9e$  
           k_ac = acy / acx 
 *it(o  
           b_ac = p1y - k_ac * p1x |Hbe]2"x>  
           k_bd = bdy / bdx I(8,D[G.m  
           b_bd = p2y - k_bd * p2x HrA6wn\O  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ou44vKzS  
           p_y = k_ac * p_x + b_ac ?
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        End Select s0Ii;7fA{  
      rt(1) = p_x blZiz2F  
      rt(2) = p_y bOCdf"!g  
     ^uW!=%D  
'计算最大半径 S^
?OKqS  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) LnJ/t(KV  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) `07u}]d8  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) R]%ZqT{PS  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 2#'[\*2|N  
Dim bb(5) As Single o'Q)V  
  bb(1) = rr1 laM0W5  
  bb(2) = rr2 k=[!{I  
  bb(3) = rr3 L%a ni}V  
  bb(4) = rr4 ->}K-n ),  
  nb = rr1 .2hQ!)+  
For i = 1 To 4 `n:IXD5'  
    If nb <= bb(i) Then V/+r"le  
       nb = bb(i) (Jfi 3 m  
    End If r0kA47  
Next i |xH"Xvp:  
    rt(0) = Sqr(nb) ?B %y)K  
    rr = rt() tc@U_>{  
  End If zQ {g~x  
         XJ]MPiXj  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  CM5A-R90  

2z0HB+Y}x  
有热压工艺方面的人才或者资料分享下； &1Cq+Yp
I  
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 Bf'jXM{-  

高手真多！

楼主威武霸气.