[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： `Mp]iD{  
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关键点说几个： pOw4H67  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） NE3G!qxL  
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 ZhM-F0;`  
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
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以下是几个重要的函数：
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1.判断点在区域中函数 WDgp(Av!  
2.计算夹角函数 KAEf4/  
3.转置函数 zM[WbB+"m  
4.得到区域中心点，及区域半径函数 1NJ*EzJ~?  
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） 1&wZJP=  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Bg7?1m  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single RAf+%h*  
   cax = x2 - x1 gxt2Mq;q~}  
   cay = y2 - y1 @/|sOF;8W  
   cbx = x2 - x3 15nc  
   cby = y2 - y3 7e}p:Vfp  
   mo_jj = cax * cbx + cay * cby &+%CC  
   mo_ca = Sqr(cax * cax + cay * cay) P`U5kNN  
   mo_cb = Sqr(cbx * cbx + cby * cby) ub.pJJlC  
   cos_acb = mo_jj / (mo_ca * mo_cb) d7KeJ$xy}p  
   'ff_cos = cos_acb sM~CP zMa  
   If cos_acb >= 1 Then X3a:*1N  
   nn = 0 \k;raQR4t*  
   ElseIf cos_acb <= -1 Then kv`x  
   nn = 3.14159265258979 7"8HlOHA  
   Else EXb{
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   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) /<|J\G21  
   End If i_gS!1Z2  
   'ff_angle = nn ,wZ[Y 3  
   ff_angle = nn * 180 / 3.14159265258979 T5Pc2
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End Function

'判断点在区域内函数 `bt]v$  
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 QRt(?96  
Dim aob, boc, cod, doa, sum As Single qZ8lU   
  If ppx = p1x And ppy = p1y Then u45e>F=  
     point_in = True gdkO|x  
     Exit Function vLpE|QZs  
  End If v SWqOv$  
  If ppx = p2x And ppy = p2y Then LJI&j \  
     point_in = True mP:mzmUw  
     Exit Function 94K;=5h  
  End If dcXtT3,kpX  
   If ppx = p3x And ppy = p3y Then guFR5>-L  
     point_in = True =E |[8 U)  
     Exit Function N#ex2c  
  End If z!RA=]3h  
     ,[cWG)-  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) FIG5]u  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 45ct*w  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ;B1}so1]  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) I94;1(Cs%  
    sum = aob + boc + cod + doa 6EPC$*Xp!  
    If 360.01 > sum And sum > 359.99 Then g:f0K2)\r:  
       point_in = True gvsS:4N"Nq  
    Else oD"fRBS+$  
       point_in = False Uhg[#TUK  
    End If IP{Cj
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End Function

'得到点半径,得到交点坐标函数 MfYe @;m  
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() UejG$JyHP  
    '求得中心点坐标 S3 x:]E:   
Dim tt As String .|iUDp6vz  
Dim rt(3) As Single JaIj9KLNX  
    '判断是否平行 0udE\/4!^  
   acx = p3x - p1x 
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   acy = p3y - p1y t^h>~o'\  
   bdx = p4x - p2x }8r+&e  
   bdy = p4y - p2y KTf!Pf?g  
   If acx * bdy = acy * bdx Then rylllJz|L:  
      rt(0) = 0 <(^-o4Cl  
      Exit Function 5dL-v&W  
   Else ? 4.W _  
      '判断斜率存在否 i]1[eGF  
      If p1x = p3x And p2x <> p4x Then 9k83wACry  
         tt = "ac_n_bd_y" A:p0p^*  
      ElseIf p1x <> p3x And p2x = p4x Then ,,{Uz)>'W6  
         tt = "ac_y_bd_n" "`&?<82  
      ElseIf p1x <> p3x And p2x <> p4x Then PE4{;|a }  
         tt = "ac_y_bd_y" ly^F?.e-  
      End If }[75`pC~O  
    Select Case tt F.@yNr"  
         Case "ac_n_bd_y" j"YJ1R-5  
            'bd线段方程 -iJ[9O  
            k_bd = bdy / bdx 1) @Wcc.  
            b_bd = p2y - k_bd * p2x hW|t
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            p_x = p1x !Noabt  
            p_y = k_bd * p_x + b_bd ^ro?.,c T  
         Case "ac_y_bd_n" jMw;`yh  
            'ac线段方程 w5&UG/z%l  
            k_ac = acy / acx k@wT,?kD  
            b_ac = p1y - k_ac * p1x my04>6j0  
            p_x = p2x YemOP9  
            p_y = k_ac * p_x + b_ac J@R+t6$3O  
        Case "ac_y_bd_y" Kh5:+n_X  
           'ac，bd线段都要求 Rf8|-G-}#  
           k_ac = acy / acx SJy?
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           b_ac = p1y - k_ac * p1x >iG`  
           k_bd = bdy / bdx 6.By)L  
           b_bd = p2y - k_bd * p2x QY{f=  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) C6/,-?%)  
           p_y = k_ac * p_x + b_ac 2&=;$2?}  
        End Select "3\)@  
      rt(1) = p_x ]cA){^.Jz  
      rt(2) = p_y b"f4}b  
     b$B5sKQ  
'计算最大半径 \!631FcQ   
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) TuX#;!p6  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) FoEZ1O<  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) zlXkD~GV  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) "+)ey>_  
Dim bb(5) As Single s2d;601*b  
  bb(1) = rr1 [u-~<80  
  bb(2) = rr2 `T~M:\^D  
  bb(3) = rr3 m=opY~&h  
  bb(4) = rr4 Tl25t^Y  
  nb = rr1 ZegsV|  
For i = 1 To 4 A70_hhP  
    If nb <= bb(i) Then n#x{~oQc  
       nb = bb(i) P~]BB.tog  
    End If (-~tb-  
Next i @YT=-  
    rt(0) = Sqr(nb) Ozn7C?\*  
    rr = rt() lffw7T~  
  End If !H.&"~w@  
         |7f}icXKur  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  pk"JcUzR  

rytizbc  
有热压工艺方面的人才或者资料分享下； U6_
1L,W  
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 BNaZD<<  

高手真多！

楼主威武霸气.