[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： t{(Mf2GR1  
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关键点说几个： $%}>zqD1  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） NhlJ3/J j  
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 ,V2#iY.%}N  
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 D0M!"c>\  

以下是几个重要的函数： d<Dn9,G  
1.判断点在区域中函数 R<j<.h  
2.计算夹角函数 *^6k[3VY  
3.转置函数 rgT%XhUS6f  
4.得到区域中心点，及区域半径函数 XPVV+.  
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） 2VMX:&3 5J  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 jDp]R_i  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 9dw0<qw1%  
   cax = x2 - x1 69OET_AS>  
   cay = y2 - y1 rJp?d9B  
   cbx = x2 - x3 :%>oe> _"  
   cby = y2 - y3 5D-BIPn=JV  
   mo_jj = cax * cbx + cay * cby >+f'!*%7He  
   mo_ca = Sqr(cax * cax + cay * cay) 6BHPzv+Y  
   mo_cb = Sqr(cbx * cbx + cby * cby) B~4mk  
   cos_acb = mo_jj / (mo_ca * mo_cb) -YAO3  
   'ff_cos = cos_acb %N1T{   
   If cos_acb >= 1 Then Tu'E{Hw  
   nn = 0 mR6E]TuM  
   ElseIf cos_acb <= -1 Then y,1S&k  
   nn = 3.14159265258979 8}J(c=4Gk  
   Else JN)"2}SE  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ew/KZE  
   End If YBeZN98Nt  
   'ff_angle = nn Hq79/wKj  
   ff_angle = nn * 180 / 3.14159265258979 (T4k~T`3  
End Function

'判断点在区域内函数 I"~xDa!  
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 nJW_a&'  
Dim aob, boc, cod, doa, sum As Single r$Yh)rp
t:  
  If ppx = p1x And ppy = p1y Then
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     point_in = True b^+Fs  
     Exit Function `f2W;@V0  
  End If t4C<#nfo  
  If ppx = p2x And ppy = p2y Then B?!9W@  
     point_in = True K%kXS  
     Exit Function m`[oT\  
  End If `\nON  
   If ppx = p3x And ppy = p3y Then ^7J~W'hI  
     point_in = True k{zs578h2  
     Exit Function qAnA=/k`  
  End If #IH<HL)t%e  
     ~r{\WZ.  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) |C&%S"*+D  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Ks9FnDm8  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 'nC3:U  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) #_?426Wfs  
    sum = aob + boc + cod + doa dxk;@Tz  
    If 360.01 > sum And sum > 359.99 Then hwEZj`9  
       point_in = True -ryDsq  
    Else UZ[/aq  
       point_in = False NKupOJJq  
    End If K
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End Function

'得到点半径,得到交点坐标函数 e|2vb
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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() ,6S_&<{  
    '求得中心点坐标 M63s(f  
Dim tt As String >C*?17\  
Dim rt(3) As Single chvrHvByS  
    '判断是否平行 ~%cSckE  
   acx = p3x - p1x UE}8Rkt  
   acy = p3y - p1y $gj+v+%N  
   bdx = p4x - p2x <M5{.`o  
   bdy = p4y - p2y c4!c_a2pS  
   If acx * bdy = acy * bdx Then mq|A8>g  
      rt(0) = 0 0})7of  
      Exit Function s$SU vo1J  
   Else 'xLM>6[wz  
      '判断斜率存在否 _WRR 3  
      If p1x = p3x And p2x <> p4x Then N'lGA;}i  
         tt = "ac_n_bd_y" INN/VDsJ  
      ElseIf p1x <> p3x And p2x = p4x Then =UI,+P:  
         tt = "ac_y_bd_n" -dc"N|.  
      ElseIf p1x <> p3x And p2x <> p4x Then X~IRpzC  
         tt = "ac_y_bd_y" w~cq%%  
      End If b@{%qh,C  
    Select Case tt -z>Z0viA  
         Case "ac_n_bd_y" ^rxfNcU7  
            'bd线段方程 }"g21-T^  
            k_bd = bdy / bdx 1)P<cNj  
            b_bd = p2y - k_bd * p2x >q} !>k$B  
            p_x = p1x !4qp
s$p{  
            p_y = k_bd * p_x + b_bd N+C%Z[gt[  
         Case "ac_y_bd_n" MHpL$g=5_  
            'ac线段方程 gLXvw]  
            k_ac = acy / acx hB2s$QS  
            b_ac = p1y - k_ac * p1x pAUfG^v  
            p_x = p2x ~I/>i&|M1  
            p_y = k_ac * p_x + b_ac (7rz:  
        Case "ac_y_bd_y" 36x5q 1  
           'ac，bd线段都要求 0,"n-5Im  
           k_ac = acy / acx "2vNkO##  
           b_ac = p1y - k_ac * p1x )DklOE
O  
           k_bd = bdy / bdx .NNcc4+  
           b_bd = p2y - k_bd * p2x [i<$ZP
  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ~q'w),bE"Q  
           p_y = k_ac * p_x + b_ac G]m[S-  
        End Select m&8U4uHN  
      rt(1) = p_x [`Qp;_K?t  
      rt(2) = p_y m"?'hR2  
     Hd=D#u=A4{  
'计算最大半径 @]y{M;  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Vx\#+)4  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) R5'Z4.~  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) n8;G,[GM80  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) )=,9`+Zta  
Dim bb(5) As Single 4? /ot;>2  
  bb(1) = rr1 Fb\2df{@  
  bb(2) = rr2 c^dl+-{Mc  
  bb(3) = rr3 [# tT o;q  
  bb(4) = rr4 @LkW_  
  nb = rr1 0N3tsIm>  
For i = 1 To 4 L[QI 5N  
    If nb <= bb(i) Then 56O<CgJF<  
       nb = bb(i) sGDrMAQt  
    End If WW8L~4Zy  
Next i gqHH Hh  
    rt(0) = Sqr(nb) 2Xj-A\Oh~  
    rr = rt() i
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  End If (

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         [V#&sAe  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  H&K)q5~  

`9"jHw`D  
有热压工艺方面的人才或者资料分享下； t-ReT_D|;  
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 (S93 %i
i  

高手真多！

楼主威武霸气.