[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： BD&AtOj[,  
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关键点说几个： ;  8u5  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ,<<HkEMS  
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 ?tf<AZ=+^L  
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 8t1,_,2'  

以下是几个重要的函数： YveNsn  
1.判断点在区域中函数 <R8!f
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2.计算夹角函数 l&
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3.转置函数 9H,Ec,.  
4.得到区域中心点，及区域半径函数 ~A-VgBbU>_  
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） o3>D~9  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 6%2\bI.#  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Dv-ubki  
   cax = x2 - x1 b'TkYa^  
   cay = y2 - y1 +u'y!@VV  
   cbx = x2 - x3 ~OOD#/  
   cby = y2 - y3 =YeI,KbA)  
   mo_jj = cax * cbx + cay * cby cO/.(KBF  
   mo_ca = Sqr(cax * cax + cay * cay) _-bEnF+/0  
   mo_cb = Sqr(cbx * cbx + cby * cby) 9$e6?<`(Y  
   cos_acb = mo_jj / (mo_ca * mo_cb) S9@)4|3C|p  
   'ff_cos = cos_acb 4-{f$Z@  
   If cos_acb >= 1 Then _33YgO  
   nn = 0 Y<9Lqc.i  
   ElseIf cos_acb <= -1 Then =%$BFg1a(  
   nn = 3.14159265258979 \z)` pno  
   Else 7="I;  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) \[;Q
qn0  
   End If C9}m-N  
   'ff_angle = nn ro*$OLc/  
   ff_angle = nn * 180 / 3.14159265258979 "ba>.h,#'  
End Function

'判断点在区域内函数 tA6x
  
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 6I,4 6 XZ-  
Dim aob, boc, cod, doa, sum As Single GK-__Y.  
  If ppx = p1x And ppy = p1y Then g$$j:U*-  
     point_in = True !xo; $4  
     Exit Function 2%zJI"Ic  
  End If Ve\=By-a|  
  If ppx = p2x And ppy = p2y Then Z=\wI:TY1  
     point_in = True :OvTZ ?\  
     Exit Function  {]=oOy1  
  End If b\H !\A  
   If ppx = p3x And ppy = p3y Then ]^ "BLbDZ@  
     point_in = True v05B7^1@_  
     Exit Function 
%K|+4ZY3  
  End If ?v$kq}Rg  
     ;fnE"}  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) v a j
 
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) _|%l) KO  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) N J_#;t#j  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) (S4[,Sx6E  
    sum = aob + boc + cod + doa C.}Vm};M  
    If 360.01 > sum And sum > 359.99 Then qD/X
%`>Q  
       point_in = True E3<~C(APW  
    Else S&`iEwG  
       point_in = False 4x%R4tk  
    End If <fm0B3i?  
End Function

'得到点半径,得到交点坐标函数 9?~K"+-SI  
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() a="\?L5  
    '求得中心点坐标 )]~;Ac^x  
Dim tt As String y~AF|Dk=  
Dim rt(3) As Single G8E=E<Yg~  
    '判断是否平行 t9yjfyk9W  
   acx = p3x - p1x !tL&Ktoj  
   acy = p3y - p1y -<GSHckD  
   bdx = p4x - p2x onOvE Y|R  
   bdy = p4y - p2y Skn2-8;10  
   If acx * bdy = acy * bdx Then hd E?%A  
      rt(0) = 0 '7Aj0U(  
      Exit Function IFg(Ze~  
   Else e//q`?
ys  
      '判断斜率存在否 MH8Selnv  
      If p1x = p3x And p2x <> p4x Then _x ;fTW0  
         tt = "ac_n_bd_y" b=-LQkcZhK  
      ElseIf p1x <> p3x And p2x = p4x Then t/HUG#W{  
         tt = "ac_y_bd_n" BDCFToSf|  
      ElseIf p1x <> p3x And p2x <> p4x Then > l@o\  
         tt = "ac_y_bd_y" aC#8%Spj  
      End If W7ffdODb  
    Select Case tt B1C"F-2d  
         Case "ac_n_bd_y" O]nZr  
            'bd线段方程 c[xH:$G?Y  
            k_bd = bdy / bdx k}o*=s>M  
            b_bd = p2y - k_bd * p2x d].(x)|st  
            p_x = p1x [8J/#!B  
            p_y = k_bd * p_x + b_bd T)QT_ST.9  
         Case "ac_y_bd_n" ;.g
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            'ac线段方程 Xw2t
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            k_ac = acy / acx TT0~41&l  
            b_ac = p1y - k_ac * p1x =p lG9  
            p_x = p2x 9J!@,Zsh  
            p_y = k_ac * p_x + b_ac 0f<$S$~h  
        Case "ac_y_bd_y" NpIx\\d  
           'ac，bd线段都要求 N))G/m3  
           k_ac = acy / acx [$D4U@mRp  
           b_ac = p1y - k_ac * p1x qU) pBA
 
           k_bd = bdy / bdx /`j~r;S  
           b_bd = p2y - k_bd * p2x z'FJx2  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) XZk?aik}`  
           p_y = k_ac * p_x + b_ac Lb>UraUvL  
        End Select wv eej@zs  
      rt(1) = p_x ]5=
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      rt(2) = p_y = +=k(*  
     nd 5w|83  
'计算最大半径 G2{.Ew  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ?l3PDorR  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) u=5~^ 9  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) #<\A[Po  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) r^$4]@Wn  
Dim bb(5) As Single P}El#y#&  
  bb(1) = rr1 ^?5[M^  
  bb(2) = rr2 9z:P#=Q:  
  bb(3) = rr3 iw$n*1M  
  bb(4) = rr4 ua^gG3n0  
  nb = rr1 )^C w  
For i = 1 To 4 -Xw i}/OX  
    If nb <= bb(i) Then ;U^7]JO;  
       nb = bb(i) T%\f$jh6  
    End If ,/qS1W(  
Next i
-]?F  
    rt(0) = Sqr(nb) o$=D`B  
    rr = rt() ?1f(@  
  End If 7|"gMw/  
         >c~Fgs  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  pq"3)+3:  

!+?,y/*5(  
有热压工艺方面的人才或者资料分享下； 7/"g} F}Q  
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 ,cR=W|6cQm  

高手真多！

楼主威武霸气.