[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： @ a$HJ:  
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关键点说几个： MUs~ZF  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） vA(')"DDT  
2.需要定义光轴的方向；简便的方法就是指定光源坐标，及网点区域坐标，这样光轴就确定了 SjZ?keKZ  
3.网点区域密度可调；把区域分成若干小块，每块的密度不同即可 F9Bj$`#)  

以下是几个重要的函数： pKM5<1J  
1.判断点在区域中函数 BWz7m9T  
2.计算夹角函数 -c1$>+  
3.转置函数 3}}#'5D  
4.得到区域中心点，及区域半径函数
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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） qZ:--,9+  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ~IB~>5U!  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Z~.3)6,z  
   cax = x2 - x1 ">? y\#OA  
   cay = y2 - y1 #\&jM -.-  
   cbx = x2 - x3 )eFq0+6*)  
   cby = y2 - y3 "ct_EPr`  
   mo_jj = cax * cbx + cay * cby D\:~G}M  
   mo_ca = Sqr(cax * cax + cay * cay) D;VFMP  
   mo_cb = Sqr(cbx * cbx + cby * cby) [y>;  
   cos_acb = mo_jj / (mo_ca * mo_cb) ;tR,w   
   'ff_cos = cos_acb e3L<;MAt  
   If cos_acb >= 1 Then ya9V+/i7T_  
   nn = 0 Tv;|K's'  
   ElseIf cos_acb <= -1 Then hb>,\46}  
   nn = 3.14159265258979 xl(];&A3  
   Else =9oN#4mWK  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) $=j}JX}z  
   End If 4g.y$  
   'ff_angle = nn >^@/Ba$h  
   ff_angle = nn * 180 / 3.14159265258979 Xegg2.Kk  
End Function

'判断点在区域内函数 tZtyx;EP  
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 zkdyfl5  
Dim aob, boc, cod, doa, sum As Single :bLL
N  
  If ppx = p1x And ppy = p1y Then xj/ +Z!,9  
     point_in = True D]9I-
|  
     Exit Function uvK1gJrA)  
  End If !\a'GO[  
  If ppx = p2x And ppy = p2y Then Cwxy~.mI  
     point_in = True F6gboo)SD  
     Exit Function RZ!-,|"cwL  
  End If ?~e 8:/@  
   If ppx = p3x And ppy = p3y Then hsVf/%  
     point_in = True ;}b.gpG  
     Exit Function 9PA\Eo|Yb  
  End If
/q4<ZS#  
     v1yNVs\}  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) C@` eYi  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) -hf)%o$  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) yWa-iHWC
 
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 5-Vdq  
    sum = aob + boc + cod + doa Kr!(<i  
    If 360.01 > sum And sum > 359.99 Then swvn*xr  
       point_in = True m4{F-++dk  
    Else 6mJa  
       point_in = False y K~;LV  
    End If DFKU?#R  
End Function

'得到点半径,得到交点坐标函数 > $0eRVL  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() L-\-wXg%  
    '求得中心点坐标 =.,]}  
Dim tt As String m5lMh14E  
Dim rt(3) As Single rK W<kQT  
    '判断是否平行 ps1ndGp~#  
   acx = p3x - p1x Be+CV">2  
   acy = p3y - p1y %"~\Pu*>  
   bdx = p4x - p2x U7d%*g  
   bdy = p4y - p2y <>`+"O}  
   If acx * bdy = acy * bdx Then 4:-h\%  
      rt(0) = 0 i.Iiwe0G  
      Exit Function A-e#&pJ  
   Else ru,]!YPJE2  
      '判断斜率存在否 "h'0&ZP~_  
      If p1x = p3x And p2x <> p4x Then Hzs]\%"  
         tt = "ac_n_bd_y" O;c;>x_dA  
      ElseIf p1x <> p3x And p2x = p4x Then 0UeDM*  
         tt = "ac_y_bd_n" @EH:4~  
      ElseIf p1x <> p3x And p2x <> p4x Then n<6p0w  
         tt = "ac_y_bd_y" s0"S;{_#  
      End If u1a5Vtel  
    Select Case tt 9E^IEwq'  
         Case "ac_n_bd_y" `An`"$z  
            'bd线段方程 E\Hhi.-  
            k_bd = bdy / bdx 59gt#1k  
            b_bd = p2y - k_bd * p2x w(pLU$6X  
            p_x = p1x $lmbeW[0  
            p_y = k_bd * p_x + b_bd cUssF%ud]  
         Case "ac_y_bd_n" ;:Q 5?zM  
            'ac线段方程 zRPXmu{t  
            k_ac = acy / acx MVU5+wX  
            b_ac = p1y - k_ac * p1x i8pM,Ppi~  
            p_x = p2x k L2(M6m  
            p_y = k_ac * p_x + b_ac I=X-e#HM?  
        Case "ac_y_bd_y" /gh=+;{  
           'ac，bd线段都要求 Qi`Lj5;\F  
           k_ac = acy / acx yS0YWqv]6@  
           b_ac = p1y - k_ac * p1x (yWU9q)5  
           k_bd = bdy / bdx w!o[pvyR$  
           b_bd = p2y - k_bd * p2x {LfVV5
?  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) )O~LXK=b  
           p_y = k_ac * p_x + b_ac F2!C^r,~L  
        End Select f
3Ior.n(  
      rt(1) = p_x =zBcfFii`w  
      rt(2) = p_y d{2+> >d  
     }yZ9pTB.?E  
'计算最大半径 %[0V>  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) @ qWgokf  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) FI
++A`  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 3a #2 }  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) +@[T0cXp  
Dim bb(5) As Single ?#"rI6  
  bb(1) = rr1 VAf"B5R  
  bb(2) = rr2 j+AAhn  
  bb(3) = rr3 Gqq%q!k&1  
  bb(4) = rr4 XB,  2+  
  nb = rr1 PP
O*&=!]  
For i = 1 To 4 @Z> {/  
    If nb <= bb(i) Then 5BnO-[3  
       nb = bb(i) i:W.,w%8  
    End If $j*%}x~[  
Next i xayo{l=uGv  
    rt(0) = Sqr(nb) XB*)d 9'8  
    rr = rt() Cmg(#$X  
  End If Zyxr#:Qm  
         lPyGL-Q  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  wEd+Ds]$  

|v,%!ps  
有热压工艺方面的人才或者资料分享下； XC44]o4jx  
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 r{NC
I  

高手真多！

楼主威武霸气.