[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： p!173y,nL  
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关键点说几个： aabnlOVw  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） T~_+\w  
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 >AJtoJ=j  
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 iN<Tn8-YH6  

以下是几个重要的函数： NbSkauF~b  
1.判断点在区域中函数 yS %J$o&
 
2.计算夹角函数 [*Wq6n  
3.转置函数 M5CFW >T  
4.得到区域中心点，及区域半径函数 R=xT\i{4h  
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） z1*8 5?  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 :D""c*  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single c=0S]_  
   cax = x2 - x1 7LbBS:@3z_  
   cay = y2 - y1 KY~p>Jmh  
   cbx = x2 - x3 YKlYo~fGN9  
   cby = y2 - y3 !?,7Cu.5#6  
   mo_jj = cax * cbx + cay * cby HZX(kYV  
   mo_ca = Sqr(cax * cax + cay * cay) ^~'tQ}]!"  
   mo_cb = Sqr(cbx * cbx + cby * cby) `q@5d&d`j  
   cos_acb = mo_jj / (mo_ca * mo_cb) *<c, x8\s9  
   'ff_cos = cos_acb JK))Cuh  
   If cos_acb >= 1 Then |3<tDq@+  
   nn = 0 l 8qCg/ew  
   ElseIf cos_acb <= -1 Then d"`/P?nx  
   nn = 3.14159265258979 &@p_g8r#  
   Else 3#<b!Yz  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ^K. d|z  
   End If .fY1?$*6c  
   'ff_angle = nn q~]S5  
   ff_angle = nn * 180 / 3.14159265258979 {]BP
Sj{B  
End Function

'判断点在区域内函数 Hj(ay4
8  
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 gCfAy=-,V  
Dim aob, boc, cod, doa, sum As Single $23*:)&J4  
  If ppx = p1x And ppy = p1y Then *9Ta0e*  
     point_in = True k@:M#?(F  
     Exit Function u-qwG/$E  
  End If mWEaUi)Zz  
  If ppx = p2x And ppy = p2y Then R<(kiD\?]  
     point_in = True m03D+@F  
     Exit Function $.HZz  
  End If "}ibH{$lM  
   If ppx = p3x And ppy = p3y Then v3\ |  
     point_in = True \"k[y+O],4  
     Exit Function 9|BH/&$  
  End If 3mef;!q  
     ["O/%6b9+  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) [l# 8}dy  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) b^s978qn#  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) |z.x M>  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) V Ioqn$  
    sum = aob + boc + cod + doa w1;:B%!H  
    If 360.01 > sum And sum > 359.99 Then -%f$$7  
       point_in = True :)JIKP%$\)  
    Else : ;l9to  
       point_in = False M9~eDw'Pr  
    End If fhwJ  
End Function

'得到点半径,得到交点坐标函数 Kx4_`;>  
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() OkNBP0e}  
    '求得中心点坐标 Th.Mn}1%L  
Dim tt As String 3bsuE^,.@  
Dim rt(3) As Single s2f6;Yc  
    '判断是否平行 \:mZ)f3K=  
   acx = p3x - p1x |(eRv?Qy@  
   acy = p3y - p1y p[LPi5  
   bdx = p4x - p2x ^WF/gup\hS  
   bdy = p4y - p2y Z:(Zy
  
   If acx * bdy = acy * bdx Then Q
xb%P<`u  
      rt(0) = 0 hnYL<<AA  
      Exit Function Ot<vn34mt:  
   Else 9M12|X\]8  
      '判断斜率存在否 %VH{bpS|i:  
      If p1x = p3x And p2x <> p4x Then y|b&Rup  
         tt = "ac_n_bd_y" M7`iAa.}  
      ElseIf p1x <> p3x And p2x = p4x Then q 3nF\Me0  
         tt = "ac_y_bd_n" faIHm
U  
      ElseIf p1x <> p3x And p2x <> p4x Then 8pXului  
         tt = "ac_y_bd_y" ~fF_]UVq3  
      End If )lhPl  
    Select Case tt [ !<  
         Case "ac_n_bd_y" ;z1\n3,  
            'bd线段方程 Mn<#rBE B  
            k_bd = bdy / bdx Ss~yy
0  
            b_bd = p2y - k_bd * p2x ` W}Bc  
            p_x = p1x dje}CbZ  
            p_y = k_bd * p_x + b_bd 'kb|!  
         Case "ac_y_bd_n" x=I|O;"><  
            'ac线段方程 `b:yW.#w3l  
            k_ac = acy / acx 360b`zS  
            b_ac = p1y - k_ac * p1x +tCNJ<S@l$  
            p_x = p2x y_:~  
            p_y = k_ac * p_x + b_ac (3VV(18  
        Case "ac_y_bd_y" *
Y]()#?Gr  
           'ac，bd线段都要求 i-FsA  
           k_ac = acy / acx +1pY^#A  
           b_ac = p1y - k_ac * p1x I xk+y?  
           k_bd = bdy / bdx \- f^C}m  
           b_bd = p2y - k_bd * p2x h0z>dLA#2  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) PdD,~N#  
           p_y = k_ac * p_x + b_ac BM>'w,$KL  
        End Select 7x''V5*j  
      rt(1) = p_x MhL>6rn  
      rt(2) = p_y 7#[8td  
     /H'F4->  
'计算最大半径 +:ih`q][b  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) V`& O`  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) %] #XIr  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 2tqj]i  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) p:Hg>Z  
Dim bb(5) As Single U][\|8i  
  bb(1) = rr1 7 (kC|q\4M  
  bb(2) = rr2 S{fFpe-  
  bb(3) = rr3 RQO&F$R=  
  bb(4) = rr4 SCL8.%z D  
  nb = rr1 De`p@`+<#~  
For i = 1 To 4 w#!b #TNc  
    If nb <= bb(i) Then sNHxUI  
       nb = bb(i) yKB&][)&  
    End If 6d{&1-@>  
Next i 5DS'22GW`  
    rt(0) = Sqr(nb) oD.[T)G?  
    rr = rt() 8Cef ]@x  
  End If 4N[KmNi<  
         $mu*iW\{  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  nArG I}@  

ipC <p?PpR  
有热压工艺方面的人才或者资料分享下； Qs,4PPEg  
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 |8?DQhd}  

高手真多！

楼主威武霸气.