[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： @b2{'#9]}  
b0]y$*{j  
'$~9~90?Z  

关键点说几个： 7Xv.C&jzd  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） z6bTcs"7h  
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 HE+y1f]  
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 38Lc|w  

以下是几个重要的函数： A[v]^pv'  
1.判断点在区域中函数 {AqN@i  
2.计算夹角函数 3> -/sii  
3.转置函数 pox\Gu~.0  
4.得到区域中心点，及区域半径函数 o`\l&jUNe  
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） \?h +  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ,ju1:`  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single jE2k\\<a  
   cax = x2 - x1 3D+>NB  
   cay = y2 - y1 E}mnGe  
   cbx = x2 - x3 il\#R%';5  
   cby = y2 - y3 &G5+bUF,  
   mo_jj = cax * cbx + cay * cby ,*a8]L  
   mo_ca = Sqr(cax * cax + cay * cay) O[3J Px  
   mo_cb = Sqr(cbx * cbx + cby * cby) $ w:QJ~,s  
   cos_acb = mo_jj / (mo_ca * mo_cb) 3>yb$ZU"-  
   'ff_cos = cos_acb O*r
KV2\  
   If cos_acb >= 1 Then TZi%,yK  
   nn = 0 A!H6$-W|p  
   ElseIf cos_acb <= -1 Then y _>HQs,:  
   nn = 3.14159265258979 SoS[yr  
   Else .?CDWbzq  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) tx Lo=  
   End If 6cVaO@/(  
   'ff_angle = nn q0jzng  
   ff_angle = nn * 180 / 3.14159265258979 GKH7Xx(  
End Function

'判断点在区域内函数 U%"c@%B0  
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 Nj*J~&6G  
Dim aob, boc, cod, doa, sum As Single zGj0'!!-  
  If ppx = p1x And ppy = p1y Then M/:kh,3  
     point_in = True \;I%>yOIu  
     Exit Function #JYv1F  
  End If Tf
Q(f?  
  If ppx = p2x And ppy = p2y Then ,E$^i~OO  
     point_in = True !h}x,=`z/  
     Exit Function <<6
i6b  
  End If Dsw(ti`@  
   If ppx = p3x And ppy = p3y Then ]Hc`<P  
     point_in = True acdaDY  
     Exit Function ;t:B:4r(j  
  End If 8k2prv^  
     ox{)O/aj  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) i*#Gq6qZq  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) NcZ6!wWdE  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) }=?kf3k  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y)
(WCpaC  
    sum = aob + boc + cod + doa tcSn`+Bu_`  
    If 360.01 > sum And sum > 359.99 Then Z 3m5DK  
       point_in = True \'&:6\-fw  
    Else z^gf@r  
       point_in = False hdQ[=PH)  
    End If `8\_ ]w0  
End Function

'得到点半径,得到交点坐标函数 t(?m!Z?tb  
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() RvZi%)  
    '求得中心点坐标 |F-_YR  
Dim tt As String 4pJOJ!?  
Dim rt(3) As Single Y 6
K<e:Y  
    '判断是否平行 P+:FiVj@~  
   acx = p3x - p1x  4>uz'j<  
   acy = p3y - p1y Yn+/yz5k_  
   bdx = p4x - p2x &Y\Vh}  
   bdy = p4y - p2y [(BA:x1  
   If acx * bdy = acy * bdx Then q{n~v>wU  
      rt(0) = 0 q@~N?$>  
      Exit Function !sfO
de)$  
   Else Fx~=mYU
 
      '判断斜率存在否 yd]W',c  
      If p1x = p3x And p2x <> p4x Then 4Smno%jq  
         tt = "ac_n_bd_y" 6k%N\!_TUW  
      ElseIf p1x <> p3x And p2x = p4x Then lRi-?I|~9  
         tt = "ac_y_bd_n" J Xo_l  
      ElseIf p1x <> p3x And p2x <> p4x Then , b ,`;I  
         tt = "ac_y_bd_y" _M8Q%  
      End If UO5^4  
    Select Case tt 5JK{dis]k  
         Case "ac_n_bd_y" Wo&MHM
P  
            'bd线段方程 1y$Bz?4  
            k_bd = bdy / bdx /0
s1q  
            b_bd = p2y - k_bd * p2x ^Jcs0c @\  
            p_x = p1x \om$%FUP  
            p_y = k_bd * p_x + b_bd B'"C?d<7  
         Case "ac_y_bd_n" t/yGMR=  
            'ac线段方程 A-aukJg9  
            k_ac = acy / acx ;hA>?o_i(  
            b_ac = p1y - k_ac * p1x , ?WTX  
            p_x = p2x / *Z(;-  
            p_y = k_ac * p_x + b_ac K%P$#a  
        Case "ac_y_bd_y" 1"RO)&  
           'ac，bd线段都要求 (5]<t&M  
           k_ac = acy / acx 1/c7((]7(,  
           b_ac = p1y - k_ac * p1x AH{]tE  
           k_bd = bdy / bdx  poGF  
           b_bd = p2y - k_bd * p2x
-^=gQ7f9  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) dy-m9fc6%  
           p_y = k_ac * p_x + b_ac "1$OPt5  
        End Select Q9tBHz  
      rt(1) = p_x rY4{,4V  
      rt(2) = p_y B4
bC6$Lg  
     8fKt6T  
'计算最大半径 U2\g Kg[-Q  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) G&)A7WaC  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) <]eWr:;  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ;f#%0W{":  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) GKu@8Ol-wu  
Dim bb(5) As Single >0~|iRySi  
  bb(1) = rr1 h-+9Bv]  
  bb(2) = rr2 !FX0Nx=oi  
  bb(3) = rr3 d@#!,P5`  
  bb(4) = rr4 6T! *YrS  
  nb = rr1 fNPHc_?Ybj  
For i = 1 To 4 coT|t T
 
    If nb <= bb(i) Then R$X1Q/#md  
       nb = bb(i) sXDS_Q  
    End If 0%+S@_|  
Next i %W~Kx_  
    rt(0) = Sqr(nb) PVH^yWi n  
    rr = rt() 5
+].$  
  End If
``kiAKMy  
         ~UA-GWb  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  7Nx5n
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lh^-L+G:Ok  
有热压工艺方面的人才或者资料分享下； )H=}bqn  
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 D>Ij  

高手真多！

楼主威武霸气.