[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： ^&Wa? m.  
~x6<A\  
3+oGR5gIN  

关键点说几个： ToX--w4  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） =:BTv[lv  
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 ;LqpX!Pi f  
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 l!mx,O`  

以下是几个重要的函数： h43py8v  
1.判断点在区域中函数 N}>[To3  
2.计算夹角函数 mDx=n.lIz  
3.转置函数 W*B=j[w  
4.得到区域中心点，及区域半径函数 #>6Jsnv1  
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） Zc'^iDAY  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 bp<,Xfl  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single "j&'R#$&d  
   cax = x2 - x1 uW [yNwM  
   cay = y2 - y1 H32o7]lT  
   cbx = x2 - x3 A{e>7Z72  
   cby = y2 - y3 f >.^7.is  
   mo_jj = cax * cbx + cay * cby Kv2S&P|jXM  
   mo_ca = Sqr(cax * cax + cay * cay) :dpwr9)  
   mo_cb = Sqr(cbx * cbx + cby * cby) P*H0Hwn;  
   cos_acb = mo_jj / (mo_ca * mo_cb) plp-[eKcD  
   'ff_cos = cos_acb ?T.=ym  
   If cos_acb >= 1 Then _-3n'i8  
   nn = 0 Oi zj|'  
   ElseIf cos_acb <= -1 Then {o 2 qY|S  
   nn = 3.14159265258979 C fM[<w   
   Else x Nj
Q"'i8  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) H\qZu%F'  
   End If ]Vmo>  
   'ff_angle = nn &q@brX<,=  
   ff_angle = nn * 180 / 3.14159265258979 s2<[@@@q  
End Function

'判断点在区域内函数 W>i"p~!  
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 &e@)yVLL  
Dim aob, boc, cod, doa, sum As Single ~r!(V;k{  
  If ppx = p1x And ppy = p1y Then V^&*y+  
     point_in = True : S3+
UT  
     Exit Function qSB&Q0T  
  End If j7gw?,  
  If ppx = p2x And ppy = p2y Then QcW8A ,\q  
     point_in = True `vgaX,F*  
     Exit Function Xs2 jR14`  
  End If ;_)~h$1%=  
   If ppx = p3x And ppy = p3y Then )\=
xPfs  
     point_in = True ~(ke'`gJ0-  
     Exit Function MCmb/.&wu  
  End If l^9gFp~I  
     ur\6~'l4  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) R-S<7Q3E0=  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 5tQz!M  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) #~|k EGt  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) d@$|zr6  
    sum = aob + boc + cod + doa Z|uvrFa  
    If 360.01 > sum And sum > 359.99 Then 7TMq#Pb  
       point_in = True I[Lg0H8  
    Else uLS]=:BT  
       point_in = False BsIF3sS#9  
    End If jU j\<aW  
End Function

'得到点半径,得到交点坐标函数 A*y4<'}<  
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() i-OD"5a`  
    '求得中心点坐标 yxt"vm;  
Dim tt As String u /F!8#  
Dim rt(3) As Single c| ^I}  
    '判断是否平行 -qIi.]/f"9  
   acx = p3x - p1x 1&=)Bxg4  
   acy = p3y - p1y 6!m#;8 4  
   bdx = p4x - p2x OX7=g$S 1  
   bdy = p4y - p2y 3x+lf4"  
   If acx * bdy = acy * bdx Then u5oM;#{@-  
      rt(0) = 0 X9m^i2tk  
      Exit Function ]/=RABi  
   Else t eY@)F  
      '判断斜率存在否 ^1S{::  
      If p1x = p3x And p2x <> p4x Then oP`l)
`  
         tt = "ac_n_bd_y" X0;u7g2Yz  
      ElseIf p1x <> p3x And p2x = p4x Then #rkq ?:Q  
         tt = "ac_y_bd_n" zZ=SAjT QP  
      ElseIf p1x <> p3x And p2x <> p4x Then -l= 4{^pK  
         tt = "ac_y_bd_y" ^K?-+  
      End If :0J`4  
    Select Case tt yvYMk(LSF  
         Case "ac_n_bd_y" |R}=HsYey  
            'bd线段方程 W8d-4')|  
            k_bd = bdy / bdx o$No@~%v  
            b_bd = p2y - k_bd * p2x )E^S+ps  
            p_x = p1x O4R\]B#Xu  
            p_y = k_bd * p_x + b_bd lz,M$HG<[  
         Case "ac_y_bd_n" +RooU?Aq  
            'ac线段方程 {kpF etXt?  
            k_ac = acy / acx m;@q('O  
            b_ac = p1y - k_ac * p1x %O\@rws  
            p_x = p2x ?o" Vkc:  
            p_y = k_ac * p_x + b_ac cC/h7odY  
        Case "ac_y_bd_y" j"qND=15  
           'ac，bd线段都要求 25SWIpgG  
           k_ac = acy / acx ,H]%4@]|o  
           b_ac = p1y - k_ac * p1x b80#75Bj>  
           k_bd = bdy / bdx n~^SwOt~;5  
           b_bd = p2y - k_bd * p2x z<%P"   
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) l2 .S^S  
           p_y = k_ac * p_x + b_ac *tXyd<_
Hd  
        End Select Sm'Tz&!  
      rt(1) = p_x -|.NwGh  
      rt(2) = p_y TLwxP"  
     "jL>P)  
'计算最大半径 PT/Nz+  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) N>I6f  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) :&BPKqKp  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) @v)Z>xv  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) `5Y*) q  
Dim bb(5) As Single )?rq8VO  
  bb(1) = rr1 dtTn]}J  
  bb(2) = rr2 5Tl5T&  
  bb(3) = rr3 $)M3fZ$#  
  bb(4) = rr4 CS[]T9|_  
  nb = rr1 Dz}i-tw+  
For i = 1 To 4 im>(^{{r&  
    If nb <= bb(i) Then :>&q?xvA  
       nb = bb(i) "to!&@I| 4  
    End If !ku}vTe  
Next i bn*:Bn1  
    rt(0) = Sqr(nb) Z)rW>I  
    rr = rt() Y|tHU'x  
  End If I*rUe#$  
         0%f}Q7*R  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  RrxbsG1HP  

A"r<$
S6  
有热压工艺方面的人才或者资料分享下； =?|$}vDO[  
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 +1#oVl!  

高手真多！

楼主威武霸气.