[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： !\/J|~XZ  
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关键点说几个： xDEjeM G  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 7j8Ou3  
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 K| '`w.  
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 ^!sIEL  

以下是几个重要的函数： OmLe+,7'  
1.判断点在区域中函数 tzrvIVD  
2.计算夹角函数 12HE=  
3.转置函数 g[$4a4X  
4.得到区域中心点，及区域半径函数 rceX|i>9n  
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） 'ZAl7k .  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 JsHD3  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ?}"39n  
   cax = x2 - x1 p> g[: ~  
   cay = y2 - y1 aKz:hG  
   cbx = x2 - x3 I`;SA~5  
   cby = y2 - y3 y~^-I5!_ u  
   mo_jj = cax * cbx + cay * cby odWK\e  
   mo_ca = Sqr(cax * cax + cay * cay) Fs&r^ [/b  
   mo_cb = Sqr(cbx * cbx + cby * cby) ;Q,,i  
   cos_acb = mo_jj / (mo_ca * mo_cb) tn}MKo  
   'ff_cos = cos_acb I&;9  
   If cos_acb >= 1 Then ;b!qt-;.<  
   nn = 0 + f,Kt9Cy  
   ElseIf cos_acb <= -1 Then ]i\;#pj}
 
   nn = 3.14159265258979 %S/?Ci  
   Else ZdgzPs"  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Q)=LbR{#  
   End If Vrs?VA`v$  
   'ff_angle = nn (D0\uld9  
   ff_angle = nn * 180 / 3.14159265258979 0+F--E4  
End Function

'判断点在区域内函数 6ZfL-E{  
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 fZrh_^yH  
Dim aob, boc, cod, doa, sum As Single +QNsI2t;r  
  If ppx = p1x And ppy = p1y Then glLoYRTi  
     point_in = True Xw3j(`w$,  
     Exit Function .3&(Y  
  End If d/!\iLF
  
  If ppx = p2x And ppy = p2y Then ,Oe:SZJ>  
     point_in = True inh J|pe"  
     Exit Function +lxjuEiae  
  End If tAsap}(  
   If ppx = p3x And ppy = p3y Then Jj?HOtaM  
     point_in = True AEkjyh\  
     Exit Function "6 ~5RCZ  
  End If W4UK?#S+  
     'q?Y5@s  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) S=\cF,Zs  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) <cU%yA710  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) zwz_K!229  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) w!'y,yb%  
    sum = aob + boc + cod + doa QiK-|hFj  
    If 360.01 > sum And sum > 359.99 Then -E~r?\;X  
       point_in = True > l]Ble  
    Else  TD%&9$F  
       point_in = False )/)[}wN;j  
    End If Em !%3C1r  
End Function

'得到点半径,得到交点坐标函数 -DK6(<:0  
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() >lKu[nq;  
    '求得中心点坐标 `S0`3q}L3%  
Dim tt As String *CPpU|  
Dim rt(3) As Single n_Qua|R  
    '判断是否平行 {Wi*B(  
   acx = p3x - p1x Np%Q-T\  
   acy = p3y - p1y ]tf`[bINP  
   bdx = p4x - p2x |'z24 :8  
   bdy = p4y - p2y NU3TXO  
   If acx * bdy = acy * bdx Then 1YQYZ^11  
      rt(0) = 0 Z,O*p,Gzn  
      Exit Function T0Xm}i  
   Else %S%IW  
      '判断斜率存在否 )z\#  
      If p1x = p3x And p2x <> p4x Then Hqs!L`oW)  
         tt = "ac_n_bd_y" }79O[&  
      ElseIf p1x <> p3x And p2x = p4x Then *hru);OJr  
         tt = "ac_y_bd_n" $}{[_2  
      ElseIf p1x <> p3x And p2x <> p4x Then 9!(%Vf>  
         tt = "ac_y_bd_y" S3l^h4  
      End If Km $o@  
    Select Case tt ge(,>xB  
         Case "ac_n_bd_y" 57EX#:a  
            'bd线段方程 "[!b5f3!I  
            k_bd = bdy / bdx #-@Uq6Y  
            b_bd = p2y - k_bd * p2x '(rD8 pc  
            p_x = p1x 1Acs0`3  
            p_y = k_bd * p_x + b_bd rhcax%
Cd  
         Case "ac_y_bd_n" VnVBA-#r|  
            'ac线段方程 ]XbMqHGS  
            k_ac = acy / acx 3qn_9f]  
            b_ac = p1y - k_ac * p1x l)*(UZ"  
            p_x = p2x %~x?C4L8  
            p_y = k_ac * p_x + b_ac }6!/Nb  
        Case "ac_y_bd_y" >mX6;6FF  
           'ac，bd线段都要求 icIn>i<m  
           k_ac = acy / acx ,}&TZkN{-  
           b_ac = p1y - k_ac * p1x ?tL' X  
           k_bd = bdy / bdx !u@P\8M}  
           b_bd = p2y - k_bd * p2x Rx&O}>"E>l  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) nH&z4-1Y?  
           p_y = k_ac * p_x + b_ac [K$5Rm5  
        End Select 2H}y1bkW  
      rt(1) = p_x xYCJO(&  
      rt(2) = p_y A5J41yH  
     S4`X^a}pY  
'计算最大半径 fs 2MYa
t  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) )xccs'H  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) :MY=Q]l  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) x<M::")5!V  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) d\nXK#)Q  
Dim bb(5) As Single $

] "M`h  
  bb(1) = rr1 bf0,3~G,P  
  bb(2) = rr2 /0H}-i  
  bb(3) = rr3 s$isDG#Sr  
  bb(4) = rr4 ^n0;Q$\  
  nb = rr1 On}1&!{1]  
For i = 1 To 4 Ao8ua|:  
    If nb <= bb(i) Then >fzyD(>  
       nb = bb(i) c>K]$;}  
    End If PVp>L*|BZ;  
Next i MGsQF#6]  
    rt(0) = Sqr(nb) 6T'UWh0S  
    rr = rt() O&BvWik  
  End If '0+~]4&}q  
         0(wu  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  %42a>piev  

G(a5@9F  
有热压工艺方面的人才或者资料分享下； nXRa_M(z8  
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 =8T!ldVxES  

高手真多！

楼主威武霸气.