[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： 8l, R|$RKP  
3V,$FS]  
RkrZncBgV<  

关键点说几个： =lE_ Q[P  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） '`/Qr~]  
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 %`kO\q_  
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 }bW"Z2^nB  

以下是几个重要的函数： ifA)Ppt<`  
1.判断点在区域中函数 ]dx6E6A,  
2.计算夹角函数 Z'vic#  
3.转置函数 {hS9FdWA;  
4.得到区域中心点，及区域半径函数 yo#aX^v~y  
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） <"93  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 i'[o,dbE  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single zNZ"PYh<u  
   cax = x2 - x1 tX<. Ud  
   cay = y2 - y1 C EzTErn  
   cbx = x2 - x3 ?)8OC(B8q  
   cby = y2 - y3 sPu@t&$  
   mo_jj = cax * cbx + cay * cby Wfw6(L  
   mo_ca = Sqr(cax * cax + cay * cay) gc ce]QS  
   mo_cb = Sqr(cbx * cbx + cby * cby) !|G
8b'  
   cos_acb = mo_jj / (mo_ca * mo_cb) TJ&Z/k3-  
   'ff_cos = cos_acb 5IwQ<V  
   If cos_acb >= 1 Then (M>[D!Yt  
   nn = 0 aSN"MTw.  
   ElseIf cos_acb <= -1 Then C78V/{  
   nn = 3.14159265258979 I;Sg9`k=  
   Else qs["&\@  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 5Tl3k=o}  
   End If *0*1.>Vg  
   'ff_angle = nn k*?Axk#  
   ff_angle = nn * 180 / 3.14159265258979 LW"p/`#<  
End Function

'判断点在区域内函数 B{In "R8  
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 JUf{;nt
 
Dim aob, boc, cod, doa, sum As Single Q>G lA  
  If ppx = p1x And ppy = p1y Then |JR;E
$  
     point_in = True 2l8TX#K  
     Exit Function &fIx2ZM[  
  End If AUan^Om  
  If ppx = p2x And ppy = p2y Then H.n+CR  
     point_in = True _#kjiJj*  
     Exit Function zvDg1p  
  End If wva| TZ  
   If ppx = p3x And ppy = p3y Then _olhCLIR-  
     point_in = True Ot^<:\<`G  
     Exit Function K;n5[o&c  
  End If Qd{h3K^hlu  
     F+lsza  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) GC<zL}  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) W@T_-pTCjK  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) !,I530eh7  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) A3!xYG=+  
    sum = aob + boc + cod + doa WgV'T#*  
    If 360.01 > sum And sum > 359.99 Then AXQG  
       point_in = True aS7%x>.A!  
    Else Me.t_)  
       point_in = False #nzVgV]  
    End If ff1Em.  
End Function

'得到点半径,得到交点坐标函数 2".^Ma^D!  
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() -%h0`hOG{  
    '求得中心点坐标 %"1*,g{  
Dim tt As String 7wm9S4+|  
Dim rt(3) As Single gLH#UwfJ  
    '判断是否平行 cSkJlhwNn  
   acx = p3x - p1x jDaWmy<ha  
   acy = p3y - p1y ;`TSu5/  
   bdx = p4x - p2x mHnHB.OL  
   bdy = p4y - p2y z;74(5?q  
   If acx * bdy = acy * bdx Then l$:.bwXXO  
      rt(0) = 0 Wb|xEwqd`  
      Exit Function \k8|3Y~g  
   Else rLy<3  
      '判断斜率存在否 N@z+h  
      If p1x = p3x And p2x <> p4x Then Je5UVf3>2&  
         tt = "ac_n_bd_y" <0,szw  
      ElseIf p1x <> p3x And p2x = p4x Then ;M95A  
         tt = "ac_y_bd_n" c<(LXf+61  
      ElseIf p1x <> p3x And p2x <> p4x Then g#=~A&4q  
         tt = "ac_y_bd_y" f a9n6uT  
      End If a9OJC4\  
    Select Case tt X+:>&&9  
         Case "ac_n_bd_y" 9
Xr@ll  
            'bd线段方程 bc".R]  
            k_bd = bdy / bdx wl*"Vagb  
            b_bd = p2y - k_bd * p2x o`!7~n  
            p_x = p1x XO=UKk+EK  
            p_y = k_bd * p_x + b_bd _QhB0/C  
         Case "ac_y_bd_n" @k~_ w#  
            'ac线段方程 GmA5E  
            k_ac = acy / acx LPOZA`  
            b_ac = p1y - k_ac * p1x }-e  
            p_x = p2x HfF4BQxm  
            p_y = k_ac * p_x + b_ac !*U
#,qY  
        Case "ac_y_bd_y" 49BLJ|:P?  
           'ac，bd线段都要求 JE`mB}8s/  
           k_ac = acy / acx LGOeBEAMV^  
           b_ac = p1y - k_ac * p1x ${/"u3a_  
           k_bd = bdy / bdx m^
8KHa  
           b_bd = p2y - k_bd * p2x 7\q_^  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) V<#E!MG  
           p_y = k_ac * p_x + b_ac )"&$.bWn  
        End Select 'pUJlPGx  
      rt(1) = p_x Vs)%*1><  
      rt(2) = p_y CQq'x+{F  
     GisI/Ir[  
'计算最大半径 {GaQV-t  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ]wMp`}$b@L  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) pY3N7&m\:  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) eBK s-2r  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) <z>K{:+>  
Dim bb(5) As Single CKAs3",  
  bb(1) = rr1 -*?Y4}mK  
  bb(2) = rr2 "!yKX(aTX  
  bb(3) = rr3 $l
jgFmR_  
  bb(4) = rr4 U#B,Q6~  
  nb = rr1 I92c!`{  
For i = 1 To 4 ,sAN,?eG~  
    If nb <= bb(i) Then R|Oy/RGY$  
       nb = bb(i) S;o U'KOY  
    End If %^L:K5V  
Next i !U,^+"l'GP  
    rt(0) = Sqr(nb) [_3Rhp:  
    rr = rt() =jik33QV<  
  End If S=Ihg  
         b&$ ?.z  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  g$~3@zD  

{ p {a0*$5  
有热压工艺方面的人才或者资料分享下； b r)oSw  
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 . m_y5J  

高手真多！

楼主威武霸气.