[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： ?iWi  
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关键点说几个： K8GP@yD]M  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） +0nJ  
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 g| I6'K!<  
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 :VRNs  

以下是几个重要的函数： K*K,}W&}
 
1.判断点在区域中函数 g+vv
a"  
2.计算夹角函数 saBVgSd  
3.转置函数 =
.Pw`.  
4.得到区域中心点，及区域半径函数 vlmB`T  
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） ! >(7+B3E*  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 LG{,c.Qj*  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single !;q&NHco  
   cax = x2 - x1 Xv ]W(f1  
   cay = y2 - y1 1H? u Qy  
   cbx = x2 - x3 t<.)Z-Ii  
   cby = y2 - y3 7zXvnxYE  
   mo_jj = cax * cbx + cay * cby
eI$oLl@  
   mo_ca = Sqr(cax * cax + cay * cay) X`kk]8=  
   mo_cb = Sqr(cbx * cbx + cby * cby) 'f!8DGix  
   cos_acb = mo_jj / (mo_ca * mo_cb) JU1~e@/'%  
   'ff_cos = cos_acb O,{6*[)@  
   If cos_acb >= 1 Then wN_Vfb  
   nn = 0 (y=C_wvqZ  
   ElseIf cos_acb <= -1 Then }aa'\8  
   nn = 3.14159265258979 u^@f&BIG]:  
   Else H%qsjB^  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) !"?#6-,Xn  
   End If q6McGHT  
   'ff_angle = nn `uv2H$  
   ff_angle = nn * 180 / 3.14159265258979 b[r8e  
End Function

'判断点在区域内函数 sJB;3"~  
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 F&4rO\aC"/  
Dim aob, boc, cod, doa, sum As Single ?ZV/U!y  
  If ppx = p1x And ppy = p1y Then =Gpylj7?~  
     point_in = True jD$,.AVvz  
     Exit Function }^ApJS(FQ  
  End If R/~p>apg8  
  If ppx = p2x And ppy = p2y Then C)[,4wt,  
     point_in = True [<lHCQXJ/  
     Exit Function ;5]Lf$tZ  
  End If ,`'Qi%O  
   If ppx = p3x And ppy = p3y Then zJq~!#pZ  
     point_in = True q}i
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     Exit Function tURu0`](  
  End If l.67++_  
     wT6"U$cV  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 3@etRd;]Kr  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) #{\J Nb+w%  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) CuaVb1r  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) H*d9l2,KZS  
    sum = aob + boc + cod + doa R6` WN  
    If 360.01 > sum And sum > 359.99 Then SL Ws*aq  
       point_in = True r<9Iof4  
    Else lEH
65;Nh*  
       point_in = False 66g9l9wm(  
    End If td(li.,  
End Function

'得到点半径,得到交点坐标函数 ;;!yC  
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() %"q9:{m  
    '求得中心点坐标 VpE*(i$  
Dim tt As String JgxtlYjl  
Dim rt(3) As Single MUaq7B_>  
    '判断是否平行 []\+k31D  
   acx = p3x - p1x W =D4r  
   acy = p3y - p1y T-'OwCB1q  
   bdx = p4x - p2x y`L>wq,KU  
   bdy = p4y - p2y y%&q/tk  
   If acx * bdy = acy * bdx Then $jjfC  
      rt(0) = 0 Xc=Y  
      Exit Function {0L1X6eg  
   Else tP:lP#9  
      '判断斜率存在否 Z_LFIz*c  
      If p1x = p3x And p2x <> p4x Then n7zm>&  
         tt = "ac_n_bd_y" IB(6+n,6s  
      ElseIf p1x <> p3x And p2x = p4x Then RFi S@.7  
         tt = "ac_y_bd_n" e6`Jbu+J<f  
      ElseIf p1x <> p3x And p2x <> p4x Then <ykU6=  
         tt = "ac_y_bd_y" 1XrO~W\=  
      End If S.mG?zbw  
    Select Case tt #Vnkvvv  
         Case "ac_n_bd_y" 5GI,o|[s6  
            'bd线段方程 pI1-cV,`  
            k_bd = bdy / bdx x!?u^  
            b_bd = p2y - k_bd * p2x $POu\TO  
            p_x = p1x &DS/v)]  
            p_y = k_bd * p_x + b_bd \S"isz  
         Case "ac_y_bd_n" yks__ylrl(  
            'ac线段方程 _:ReN_0  
            k_ac = acy / acx =T3<gGM  
            b_ac = p1y - k_ac * p1x [meO[otb  
            p_x = p2x o8 IL$:  
            p_y = k_ac * p_x + b_ac t=BUN  
        Case "ac_y_bd_y" sZ3KT&  
           'ac，bd线段都要求 IY_iB*T3jt  
           k_ac = acy / acx #QS`_TlKk  
           b_ac = p1y - k_ac * p1x ]RZ|u*l=x  
           k_bd = bdy / bdx (j%~u&+-  
           b_bd = p2y - k_bd * p2x zv|2:4H  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) cb@?}(aFl  
           p_y = k_ac * p_x + b_ac D.r<QO~6B
 
        End Select ^3G{|JB!+  
      rt(1) = p_x EH-sZAv  
      rt(2) = p_y Rm2yPuOU}A  
     im${3>26  
'计算最大半径 SUMrFd~  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) E7WK (  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) U2ohHJ``  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) [xbSYu,&  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) B~?*?Z'  
Dim bb(5) As Single FXpJqlhNv  
  bb(1) = rr1 48J@CvU  
  bb(2) = rr2 1;JEc9#h  
  bb(3) = rr3 <!&[4-;fU  
  bb(4) = rr4 v>6"j1Z  
  nb = rr1 p99]  
For i = 1 To 4 pD8+ 4;A  
    If nb <= bb(i) Then 9d>-MX'  
       nb = bb(i) Z< 1  
    End If PoHg,n]  
Next i `oAW7q)~  
    rt(0) = Sqr(nb) 9G9t" {  
    rr = rt() 'HO$C,1]  
  End If @Y?#Sl*  
         ,xw#NG6  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  oL-]3TY~  

q$p%ZefZ  
有热压工艺方面的人才或者资料分享下； xg30xC[  
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 0mpX)S  

高手真多！

楼主威武霸气.