[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： hB<z]sl  
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关键点说几个： ^?VT y5yp  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） G uI sM  
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 H.S|njn:r  
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 ba1QFzN  

以下是几个重要的函数： n>+W]I&E  
1.判断点在区域中函数 PvCE}bY{}  
2.计算夹角函数 sbhEZ#7#  
3.转置函数 TZ]Gl4@  
4.得到区域中心点，及区域半径函数 qq{N; C  
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） ]b$,.t5  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 hiM!htc;M  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single R;ug+N  
   cax = x2 - x1 2DQC)Pe+z  
   cay = y2 - y1 iKKWn*u  
   cbx = x2 - x3 _n g
MC]-T  
   cby = y2 - y3 A|-\C$  
   mo_jj = cax * cbx + cay * cby b=l}|)a  
   mo_ca = Sqr(cax * cax + cay * cay) &zy9}4w,  
   mo_cb = Sqr(cbx * cbx + cby * cby) &Wk<F3qN  
   cos_acb = mo_jj / (mo_ca * mo_cb) VlNzm  
   'ff_cos = cos_acb Agf!6kh  
   If cos_acb >= 1 Then U#4W"1~iX  
   nn = 0 =w>QG{-N  
   ElseIf cos_acb <= -1 Then /q]@|5I  
   nn = 3.14159265258979 FX 3[U+  
   Else K`<P^XJr  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) L+CSF ]  
   End If 6w,xb&S  
   'ff_angle = nn B9-=.2.WU  
   ff_angle = nn * 180 / 3.14159265258979 Ymvd=F   
End Function

'判断点在区域内函数 Y8(yOVy9  
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 DK1)9<  
Dim aob, boc, cod, doa, sum As Single ~K`blW
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  If ppx = p1x And ppy = p1y Then us+adS.l&  
     point_in = True ,-Gw#!0  
     Exit Function ^g\%
VIOD  
  End If \266N;JrN  
  If ppx = p2x And ppy = p2y Then C5z4%,`f  
     point_in = True bE"CSK#  
     Exit Function 8%Lg)hvl  
  End If m|[Hhw=f  
   If ppx = p3x And ppy = p3y Then |Gi/=[Tp  
     point_in = True qE[}Cf]X
 
     Exit Function NKws;/u  
  End If ?1sY S  
     = '[@UVH(Z  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y)  O(!'V~3  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) S;~_9i]upe  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) :08UeEy  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) V ALYA=w/  
    sum = aob + boc + cod + doa mx2 Jt1  
    If 360.01 > sum And sum > 359.99 Then }$ der  
       point_in = True dXhV]
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    Else (%1*<6ka  
       point_in = False AXFVsZH"zi  
    End If Kt(p|  
End Function

'得到点半径,得到交点坐标函数 ?zEgN!\R)  
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() 'J}lnt[V  
    '求得中心点坐标  `S|gfJ  
Dim tt As String f 36rU  
Dim rt(3) As Single P+xZaf H  
    '判断是否平行 /e}k7U,^  
   acx = p3x - p1x 2B#\683  
   acy = p3y - p1y PNq#o%q  
   bdx = p4x - p2x %zGPF  
   bdy = p4y - p2y `#hy'S:e  
   If acx * bdy = acy * bdx Then B(~D*H2T[  
      rt(0) = 0 I`|>'$E[r  
      Exit Function .*,ZcO  
   Else r*Mm5QozA  
      '判断斜率存在否 T!n<ya
!  
      If p1x = p3x And p2x <> p4x Then Y:wds=lA  
         tt = "ac_n_bd_y" .s+e hZ  
      ElseIf p1x <> p3x And p2x = p4x Then ?~$y3<[  
         tt = "ac_y_bd_n" P VPwYmte  
      ElseIf p1x <> p3x And p2x <> p4x Then C/XOI>  
         tt = "ac_y_bd_y" Tb[GZ,/%;  
      End If V}("8L  
    Select Case tt /Wa+mp  
         Case "ac_n_bd_y" #Xc~3rg9  
            'bd线段方程 "H({kmR  
            k_bd = bdy / bdx $8s&=OW  
            b_bd = p2y - k_bd * p2x 6-oQs?  
            p_x = p1x ,i}"e(f  
            p_y = k_bd * p_x + b_bd X@ss d  
         Case "ac_y_bd_n" D^pAf/ek@i  
            'ac线段方程 8w\&QX  
            k_ac = acy / acx KP i@wl3  
            b_ac = p1y - k_ac * p1x ixp%aRRP  
            p_x = p2x _&T$0SZco  
            p_y = k_ac * p_x + b_ac yfU1;M
I  
        Case "ac_y_bd_y" ,Vogo5~X  
           'ac，bd线段都要求 90q*V%cS  
           k_ac = acy / acx up`6IWlLE  
           b_ac = p1y - k_ac * p1x 3cnsJV]  
           k_bd = bdy / bdx TnC'<zm9!  
           b_bd = p2y - k_bd * p2x FIuKX"XR  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) bY`k`3v  
           p_y = k_ac * p_x + b_ac DP?gozm  
        End Select U_:/>8})d  
      rt(1) = p_x </fzBaTo  
      rt(2) = p_y zUOYH4+  
     b_B4  
'计算最大半径 MT3UJ6~P  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) {5,CW  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) -v]7}[
.[  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) y(%6?a @  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) P\Ka'i  
Dim bb(5) As Single (|WqOwmoUt  
  bb(1) = rr1 2JbCYCTC  
  bb(2) = rr2 6pH.sX$!_  
  bb(3) = rr3 (h E^<jNR  
  bb(4) = rr4 8r~4iVwg  
  nb = rr1 1(-)$m8}  
For i = 1 To 4 F:\CDM=lS  
    If nb <= bb(i) Then #jnb6v=5v  
       nb = bb(i) m49)cK?  
    End If VH8,!#Q;  
Next i ?O28Q DUI  
    rt(0) = Sqr(nb) +Ix;~  
    rr = rt() Tfj%Sb,zM  
  End If Cjw|.c`  
         um[.r,++  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  br`cxgZ0"  

b"iPuN!p  
有热压工艺方面的人才或者资料分享下； Mh3Tfp  
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 H[S[ y  

高手真多！

楼主威武霸气.