[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： cf[vf!vi  
{lzG*4?  

描述:请输入描述

图片:2.jpg

~HUZ#rUHm>  

关键点说几个： 1
}`LTPW9  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） iIU( C.I  
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 LnMwx#^*  
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 i@<~"~>]7  

以下是几个重要的函数： Jc~E"x  
1.判断点在区域中函数 W<gD6+=8  
2.计算夹角函数 u"F;OT\>g  
3.转置函数 *=^[VV!  
4.得到区域中心点，及区域半径函数 ,eELRzjl  
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） (4)3W^/kk?  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 @c"yAy^t  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single A[Cg/ +Z  
   cax = x2 - x1 U3q5^{0d/  
   cay = y2 - y1 ~M[>m~8  
   cbx = x2 - x3 $PfV<Yj'B  
   cby = y2 - y3
 'O1.6*K  
   mo_jj = cax * cbx + cay * cby lIy/;hIc  
   mo_ca = Sqr(cax * cax + cay * cay) HU3Vv<lz  
   mo_cb = Sqr(cbx * cbx + cby * cby) 7dhn'TW  
   cos_acb = mo_jj / (mo_ca * mo_cb) L9'-  
   'ff_cos = cos_acb VEo^ :o)r  
   If cos_acb >= 1 Then Y_shy6"KH  
   nn = 0 s#Q_Gu  
   ElseIf cos_acb <= -1 Then 2vXGO|W  
   nn = 3.14159265258979 (E]"Srwh  
   Else d:$G|<uA  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Y=WR6!{  
   End If 6Wu*.53  
   'ff_angle = nn $pBr &,  
   ff_angle = nn * 180 / 3.14159265258979 I_L;T  
End Function

'判断点在区域内函数 JbVi1?c  
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 Uc>LFX& -B  
Dim aob, boc, cod, doa, sum As Single 0<"tl0p_  
  If ppx = p1x And ppy = p1y Then YmA) @1@U  
     point_in = True ees^O{ 8  
     Exit Function OUKj@~T  
  End If t)`+d=P  
  If ppx = p2x And ppy = p2y Then {)jk_&c7  
     point_in = True $/
y%[ .  
     Exit Function T7X!#j"\  
  End If jS}'cm-  
   If ppx = p3x And ppy = p3y Then zZw@c?  
     point_in = True /TG| B Eb  
     Exit Function ="=#5C  
  End If KXDz'9_  
     pIrv$^  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) "Vq@bNtu+  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) |4LQ\'N&  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ?RqTbT@~  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) T=Ol`?5  
    sum = aob + boc + cod + doa X$ejy/+.  
    If 360.01 > sum And sum > 359.99 Then .M`LUb"!  
       point_in = True %j!z\pa  
    Else 1_XO3P\  
       point_in = False {!>E9Px  
    End If Z@8MhJ  
End Function

'得到点半径,得到交点坐标函数 D;K&  
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() v_[)FN"]Y.  
    '求得中心点坐标 @)S sKk|  
Dim tt As String P((S2"D<4  
Dim rt(3) As Single KLj4LOs  
    '判断是否平行 GC,vQ\  
   acx = p3x - p1x y_;]=hEL  
   acy = p3y - p1y j P{:A9T\  
   bdx = p4x - p2x #%9oQ6nO  
   bdy = p4y - p2y @|jKO5Y  
   If acx * bdy = acy * bdx Then BvNl?A@]A  
      rt(0) = 0 +6i7,U  
      Exit Function )@sJTAK  
   Else w50.gr7  
      '判断斜率存在否 I 0x`H)DA  
      If p1x = p3x And p2x <> p4x Then dVjcK/T<  
         tt = "ac_n_bd_y" /7!_un9  
      ElseIf p1x <> p3x And p2x = p4x Then 1D3dYVE  
         tt = "ac_y_bd_n" }D&"z8mP  
      ElseIf p1x <> p3x And p2x <> p4x Then Ew)n~!s  
         tt = "ac_y_bd_y" 7<Z~\3x  
      End If a 5~G  
    Select Case tt Y#Sd2h,^X  
         Case "ac_n_bd_y" QYODmeu  
            'bd线段方程 35-DnTv  
            k_bd = bdy / bdx FkB6*dm-  
            b_bd = p2y - k_bd * p2x mgJ]@s}9  
            p_x = p1x ui0J}DM  
            p_y = k_bd * p_x + b_bd \#IJ=+z  
         Case "ac_y_bd_n" G!> iqG  
            'ac线段方程 BWqik_  
            k_ac = acy / acx 1"~O"msb  
            b_ac = p1y - k_ac * p1x ZQgxrZx3  
            p_x = p2x @U7#, G  
            p_y = k_ac * p_x + b_ac zz+M1n-;o  
        Case "ac_y_bd_y" cQUH%7m  
           'ac，bd线段都要求 E.WNykF-  
           k_ac = acy / acx wz|Q%.%?[  
           b_ac = p1y - k_ac * p1x A
>ug'.  
           k_bd = bdy / bdx ^=heen<S%  
           b_bd = p2y - k_bd * p2x Azdz3/  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) M+;!]tbc3  
           p_y = k_ac * p_x + b_ac 2<\yky  
        End Select 4F1
.D9u  
      rt(1) = p_x troy^H  
      rt(2) = p_y tDuUAI54  
     w<8O=  
'计算最大半径 :_
I wc=  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) E@'CU9Fo  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) x3p;H02i\  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) *cI6&;y  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) "`V"2zZlj  
Dim bb(5) As Single y~#R:&d"  
  bb(1) = rr1 H *z0xxa  
  bb(2) = rr2 hhh: rmEZl  
  bb(3) = rr3 ;_Of`C+  
  bb(4) = rr4 )0 42?emn  
  nb = rr1 fjz2m   
For i = 1 To 4 zd*W5~xKg  
    If nb <= bb(i) Then }.Na{]<gh  
       nb = bb(i) T[8"u<O96  
    End If 1Q2k>q8  
Next i G74a9li@  
    rt(0) = Sqr(nb) EnsNO_"e|  
    rr = rt() ? A^3.`  
  End If )sz2 9  
         \CEnOq  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ]GPz>k  

r D!.N   
有热压工艺方面的人才或者资料分享下； 1AkHig,  
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 `m0Uj9)#  

高手真多！

楼主威武霸气.