[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： "o}+Ciul  
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关键点说几个： |02gupqqi  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） q2:6QM&  
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 FNY8tv*/x  
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 _1!OlQ  

以下是几个重要的函数： (~wqa 3  
1.判断点在区域中函数 qUGC"<W  
2.计算夹角函数 8sTp`}54J  
3.转置函数 *>2W#D)b=  
4.得到区域中心点，及区域半径函数 JJ2_hVU  
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） }Nm#q@o$P  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 rrqR}}l  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single KB`!Sj\  
   cax = x2 - x1 M&@b><B  
   cay = y2 - y1 v99B7VH4  
   cbx = x2 - x3 1V4s<m>#  
   cby = y2 - y3 kabnVVn~  
   mo_jj = cax * cbx + cay * cby ,)Ju[
 
   mo_ca = Sqr(cax * cax + cay * cay) Xti[[sJ
 
   mo_cb = Sqr(cbx * cbx + cby * cby) wrbLDod /  
   cos_acb = mo_jj / (mo_ca * mo_cb) 9XyYHi  
   'ff_cos = cos_acb D 38$`j  
   If cos_acb >= 1 Then jN>{'TqW4  
   nn = 0 28H8l2{[>  
   ElseIf cos_acb <= -1 Then 5b/|!{  
   nn = 3.14159265258979 XKttZOiGT  
   Else N#7Q
zB9]  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) h\.zdpR  
   End If ##;Er47@^  
   'ff_angle = nn
oA7;.:3  
   ff_angle = nn * 180 / 3.14159265258979 e7(ucE  
End Function

'判断点在区域内函数 R~jHr )0.#  
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 _ozg_E  
Dim aob, boc, cod, doa, sum As Single ,0~9dS   
  If ppx = p1x And ppy = p1y Then 4*mS y  
     point_in = True `|#Qx3n%  
     Exit Function $:j G-r  
  End If OhmQ,  
  If ppx = p2x And ppy = p2y Then (_*5oj-  
     point_in = True s^|.Zr;,>  
     Exit Function ,4,V4 N  
  End If V$icWu  
   If ppx = p3x And ppy = p3y Then qYf
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     point_in = True <b?!jV7  
     Exit Function RUUk f({(  
  End If e9Pk"HHl  
     M- 2Tz[  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 8kt5KnD2  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 2gjGeM  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y)  ^eGNgE  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) kWb2F7m  
    sum = aob + boc + cod + doa 'K*AV7>E  
    If 360.01 > sum And sum > 359.99 Then tpEI(9>  
       point_in = True
GK}'R=   
    Else ?$Wn!"EC8  
       point_in = False /?6|&  
    End If ,prF6*g+WE  
End Function

'得到点半径,得到交点坐标函数 HFQR ;9]  
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() KZ:8[d  
    '求得中心点坐标 v !Kw< fp|  
Dim tt As String q 'a  
Dim rt(3) As Single aSYs_?&.  
    '判断是否平行 8{Fm[ %"  
   acx = p3x - p1x )W&>[B  
   acy = p3y - p1y 4oXbPr>  
   bdx = p4x - p2x d(*fy}  
   bdy = p4y - p2y }98>5%Uv  
   If acx * bdy = acy * bdx Then q1hMmMi  
      rt(0) = 0 l t]B#, '  
      Exit Function B7-RU<n  
   Else }yEoEI`  
      '判断斜率存在否 Cw,D{  
      If p1x = p3x And p2x <> p4x Then =j /hl  
         tt = "ac_n_bd_y" [H"#7t.V-~  
      ElseIf p1x <> p3x And p2x = p4x Then ?&h3P8  
         tt = "ac_y_bd_n" >n7["7HHk  
      ElseIf p1x <> p3x And p2x <> p4x Then _8h8Wtif  
         tt = "ac_y_bd_y" 4W\,y_Qo  
      End If ._p""'Sa  
    Select Case tt $)e:8jS=  
         Case "ac_n_bd_y" hK}bj  
            'bd线段方程 t&814Uf&\  
            k_bd = bdy / bdx H]qq ~bO[  
            b_bd = p2y - k_bd * p2x D?+ RJs
  
            p_x = p1x j/<??v4F4  
            p_y = k_bd * p_x + b_bd G79C {|c\  
         Case "ac_y_bd_n" Plz-7fy33  
            'ac线段方程 yCM{M  
            k_ac = acy / acx 2Yyb#Ow  
            b_ac = p1y - k_ac * p1x X
n7[n  
            p_x = p2x `5"/dC  
            p_y = k_ac * p_x + b_ac "zZ&n3=@  
        Case "ac_y_bd_y" uaQ&&5%%J  
           'ac，bd线段都要求 (4)3W^/kk?  
           k_ac = acy / acx 
/;UTC)cJ  
           b_ac = p1y - k_ac * p1x BpXEK.Xw  
           k_bd = bdy / bdx !=M/j}  
           b_bd = p2y - k_bd * p2x urxqek  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) G(i\'#5+  
           p_y = k_ac * p_x + b_ac UIw?;:Y  
        End Select 0e9A+&r  
      rt(1) = p_x `Wwh`]#"~d  
      rt(2) = p_y :Ba-u  
     cJq<9(  
'计算最大半径 2wOy}:  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) .5k^f5a  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 5k`e^ARf  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) WA$ p_% r=  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) KH)pJG|NY  
Dim bb(5) As Single I! ITM<Z$l  
  bb(1) = rr1 bfc.rZ  
  bb(2) = rr2 ]J~g'">  
  bb(3) = rr3 A@{ !:_55  
  bb(4) = rr4 v*gLNB,ZH  
  nb = rr1 Rmgxf/  
For i = 1 To 4 Ty iU1,oO  
    If nb <= bb(i) Then 1uj05aZh}  
       nb = bb(i) Suj}MEiv  
    End If m4\g o  
Next i Cg?I'1]o6  
    rt(0) = Sqr(nb) Bzwx0c2VY8  
    rr = rt() pJ$(ozV  
  End If ^$?7H>=_ha  
         -<12~HKK::  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  k=d%.kg  

;_Of`C+  
有热压工艺方面的人才或者资料分享下； NXV~[  
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 ~8n~4  

高手真多！

楼主威武霸气.