[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： `E1_S  

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图片:2.jpg

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关键点说几个： XQoT},C  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） {w1h<;MH  
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 9;WOqBD  
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 &_x/Dzu!z  

以下是几个重要的函数： K@u."e
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1.判断点在区域中函数 B*?PB]  
2.计算夹角函数 g.sV$.T2K  
3.转置函数 ,$(v#Tz  
4.得到区域中心点，及区域半径函数 3
B|-xq;]I  
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） +g7nM7,1a  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 &>b1ES.>  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ^W05Z!}  
   cax = x2 - x1
._nKM5.  
   cay = y2 - y1 IbaL.t\>  
   cbx = x2 - x3 R}26"+~  
   cby = y2 - y3 ,DOmh<b  
   mo_jj = cax * cbx + cay * cby 6(^9D_
"@  
   mo_ca = Sqr(cax * cax + cay * cay) =8D4:Ds  
   mo_cb = Sqr(cbx * cbx + cby * cby) h4i$z-!  
   cos_acb = mo_jj / (mo_ca * mo_cb) twS3J)UH  
   'ff_cos = cos_acb <|G~S<y}  
   If cos_acb >= 1 Then qP'g}Pc  
   nn = 0 `v{X@x  
   ElseIf cos_acb <= -1 Then *c c+
Fd  
   nn = 3.14159265258979 |;-r};  
   Else ng*E9Puu[  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) q,&T$Tw  
   End If ~8{3Fc0  
   'ff_angle = nn e>Y2q|S85  
   ff_angle = nn * 180 / 3.14159265258979 f)P/@rh  
End Function

'判断点在区域内函数 -;-"i J0  
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 c3t8yifQ  
Dim aob, boc, cod, doa, sum As Single f~9Y1|6  
  If ppx = p1x And ppy = p1y Then c/U6K yiK  
     point_in = True ,4,c-   
     Exit Function I!O S&8:u  
  End If !l^AKn|  
  If ppx = p2x And ppy = p2y Then <J`xCm K  
     point_in = True c10).zZ  
     Exit Function lHqx}n@e  
  End If A$6b=2hc>  
   If ppx = p3x And ppy = p3y Then 9-6_:N>
 
     point_in = True "6QMa,)D  
     Exit Function 1z:N$O_v  
  End If N|S xAg  
     - S-1<xR  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Th^#H  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) %MNV 5UA[w  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ;#j82  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) i`'^ zR(`i  
    sum = aob + boc + cod + doa Ti'kn{ Zv  
    If 360.01 > sum And sum > 359.99 Then Fo~v.+^?  
       point_in = True )&Bv\Tfjt  
    Else >cL2PN_y  
       point_in = False c<e\JJY5?  
    End If F k;su,]_  
End Function

'得到点半径,得到交点坐标函数 Beg5[4@  
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() G- WJlu  
    '求得中心点坐标 V0i$"|F+E  
Dim tt As String AAgA]OD,  
Dim rt(3) As Single NhX.yLb$   
    '判断是否平行 KL]!E ~i  
   acx = p3x - p1x 9YhsJ~"Q
 
   acy = p3y - p1y ?F{xDfqw  
   bdx = p4x - p2x 2zu~#qU[)M  
   bdy = p4y - p2y f34&:xz2U  
   If acx * bdy = acy * bdx Then gQ#T7  
      rt(0) = 0 kELyD(^P`  
      Exit Function g<%-n,  
   Else taaAwTtk?A  
      '判断斜率存在否 i]pG}SJ  
      If p1x = p3x And p2x <> p4x Then &S]v+wF  
         tt = "ac_n_bd_y" *`T&Dlt'8  
      ElseIf p1x <> p3x And p2x = p4x Then !@k@7~i  
         tt = "ac_y_bd_n" YU(*kC8   
      ElseIf p1x <> p3x And p2x <> p4x Then ^/vWK\-  
         tt = "ac_y_bd_y" tb3fz")UC  
      End If m28w4   
    Select Case tt A8GlE  
         Case "ac_n_bd_y" oW6<7>1M7  
            'bd线段方程 _B FX5ifK  
            k_bd = bdy / bdx l&xD3u^G  
            b_bd = p2y - k_bd * p2x k
]pD3.QJ  
            p_x = p1x x`i`]6q  
            p_y = k_bd * p_x + b_bd XtdLKYET  
         Case "ac_y_bd_n" e8<nPt`C  
            'ac线段方程 #SNI dc>9\  
            k_ac = acy / acx o1+]6s+j}  
            b_ac = p1y - k_ac * p1x ^?[<!VBI  
            p_x = p2x mkzk$_  
            p_y = k_ac * p_x + b_ac mXj Ljgc}  
        Case "ac_y_bd_y" d<nB=r!*  
           'ac，bd线段都要求 RNtA4rC>#  
           k_ac = acy / acx +Q0-jS#d  
           b_ac = p1y - k_ac * p1x {][7Np!y  
           k_bd = bdy / bdx d2yHfl]3  
           b_bd = p2y - k_bd * p2x >Fk
`h=Wd  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) @$Kq<P  
           p_y = k_ac * p_x + b_ac )m;qv'=!  
        End Select l?_!eA  
      rt(1) = p_x q.km>XRk~  
      rt(2) = p_y q|l|mO  
     w{x(YVSH  
'计算最大半径 Y_hRL&u3W  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) AiHf?"EVT  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ;XQ lj?:  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) R9G)X]  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) vaJXX  
Dim bb(5) As Single )0MshgM  
  bb(1) = rr1 chzR4"WZFt  
  bb(2) = rr2 g@VndAp  
  bb(3) = rr3 LlY*r+Cgl1  
  bb(4) = rr4 1t=X: ]0j  
  nb = rr1 K(fLqXE%  
For i = 1 To 4 UDtbfc7bk  
    If nb <= bb(i) Then N@a'd0oTd  
       nb = bb(i) utJVuJw:t  
    End If NVWeJ+w  
Next i #ic 2ofI  
    rt(0) = Sqr(nb) y]f^`2L!8>  
    rr = rt() A=
]F_  
  End If H<7DcwXv  
         s Xk?.A_D  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  @"{'j  

gF,[u  
有热压工艺方面的人才或者资料分享下； Vy% :\p+  
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 }6CXJ+-UR  

高手真多！

楼主威武霸气.