[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： [#-b8Cu  
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关键点说几个： ykl .1(  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Eo{"9j\  
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 i!J8 d"  
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 rf $QxJ  

以下是几个重要的函数： `bFff%_  
1.判断点在区域中函数 ;T"zV{;7BR  
2.计算夹角函数 #bUXgn>  
3.转置函数 P^A!.}d  
4.得到区域中心点，及区域半径函数 W=j[V Oq  
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） n!NS(.o  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ukIQr/k  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single OjFLPGRCh  
   cax = x2 - x1 8D>n1b(H  
   cay = y2 - y1 <D:.(AUeO  
   cbx = x2 - x3 1M}5>V{  
   cby = y2 - y3 d@ i}-;  
   mo_jj = cax * cbx + cay * cby ur3(HL  
   mo_ca = Sqr(cax * cax + cay * cay) kddZZA3`  
   mo_cb = Sqr(cbx * cbx + cby * cby) !zkZQ2{Wn  
   cos_acb = mo_jj / (mo_ca * mo_cb) 01}C^iD  
   'ff_cos = cos_acb VRI0W`  
   If cos_acb >= 1 Then 87BHq)  
   nn = 0 Z1 Bp+a3  
   ElseIf cos_acb <= -1 Then 6%t1bM a  
   nn = 3.14159265258979 A;*d}Xe&J  
   Else b:Wm8pp?  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) spdvZU=}  
   End If 55tKTpV  
   'ff_angle = nn .ni_p 6!  
   ff_angle = nn * 180 / 3.14159265258979 eZSNNgD<:  
End Function

'判断点在区域内函数 v3aYc:C  
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 oXb;w@:  
Dim aob, boc, cod, doa, sum As Single (BTVD,G  
  If ppx = p1x And ppy = p1y Then r[BVvX/,F  
     point_in = True x[$z({Yf  
     Exit Function bmfI~8  
  End If [P&7i57  
  If ppx = p2x And ppy = p2y Then 1DE1.1  
     point_in = True ]L9s%]o  
     Exit Function MCS8y+QK  
  End If 4kBaB  
   If ppx = p3x And ppy = p3y Then ^G4Py<s  
     point_in = True |G?htZF  
     Exit Function *v9 2  
  End If J%x\=Sv  
     :c8&N-`  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 3QG7C{  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ~yH?=:>U  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) \6R,Nq
 
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) N+Y]st+  
    sum = aob + boc + cod + doa &3bx`C  
    If 360.01 > sum And sum > 359.99 Then k< y>)  
       point_in = True 3~uW I%I`  
    Else %p2Sh)@M  
       point_in = False )%`^xR  
    End If *=(lyx_O  
End Function

'得到点半径,得到交点坐标函数 )N7Y^CN~  
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() 2QJ{a46}  
    '求得中心点坐标 3
HcQ(+Z  
Dim tt As String 1Cgso`  
Dim rt(3) As Single _V7r1fY:  
    '判断是否平行 /SrCElabP  
   acx = p3x - p1x C~o7X^[R\  
   acy = p3y - p1y a1_GIM0  
   bdx = p4x - p2x 3'cE\u  
   bdy = p4y - p2y *Zt#U#  
   If acx * bdy = acy * bdx Then f;W|\z'  
      rt(0) = 0 LUM@#3&  
      Exit Function P:k>aHnW  
   Else PIdikA  
      '判断斜率存在否 TFkZpe;  
      If p1x = p3x And p2x <> p4x Then '}B+r@YCN  
         tt = "ac_n_bd_y" 1*9U1\z  
      ElseIf p1x <> p3x And p2x = p4x Then 8,?h~prc  
         tt = "ac_y_bd_n" @ycDCB(D}  
      ElseIf p1x <> p3x And p2x <> p4x Then g
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         tt = "ac_y_bd_y" {>DEsO  
      End If @zU6t|mhz  
    Select Case tt
d@XV:ae  
         Case "ac_n_bd_y" "1L$|  
            'bd线段方程 W-?()dX{  
            k_bd = bdy / bdx i36eBjT  
            b_bd = p2y - k_bd * p2x h*w%jdQ6  
            p_x = p1x U%q7Ai7  
            p_y = k_bd * p_x + b_bd pe]A5\4c  
         Case "ac_y_bd_n" C71qPb|$R  
            'ac线段方程 !cO]<CWPq  
            k_ac = acy / acx 95A1:A^t  
            b_ac = p1y - k_ac * p1x >z%&xgOa  
            p_x = p2x @mw5~+  
            p_y = k_ac * p_x + b_ac =cm~vDl[  
        Case "ac_y_bd_y" ST:A<Da"  
           'ac，bd线段都要求 [lWQ'DZ  
           k_ac = acy / acx $$Oey)*  
           b_ac = p1y - k_ac * p1x 0 q}*S~  
           k_bd = bdy / bdx +nXK-g;)'  
           b_bd = p2y - k_bd * p2x 8<8:+M}  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) "Zl5<  
           p_y = k_ac * p_x + b_ac JBE!j-F  
        End Select x:),P-~w  
      rt(1) = p_x }<@b=_>S  
      rt(2) = p_y S- pV_Ff  
     ~<_2WQ/$  
'计算最大半径 W6?pswQ  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) zsX1QN16  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) kYG/@7f/  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) + +M$#Er&  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) YG@t5j#b  
Dim bb(5) As Single 5*lT.  
  bb(1) = rr1 3Z5D)zuc  
  bb(2) = rr2 iV'k}rXC  
  bb(3) = rr3 VH9dleZ  
  bb(4) = rr4 xTj|dza  
  nb = rr1 i~I%D%;  
For i = 1 To 4 $ M`hh{ -  
    If nb <= bb(i) Then /67 h&j  
       nb = bb(i) (.D~0a JU  
    End If pR(jglm7-  
Next i '*5i)^  
    rt(0) = Sqr(nb) wQ^EYKD  
    rr = rt() _P0T)-X\(  
  End If YB(Q\hT~\;  
         (7*%K&x  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  wo4;n9@I  

e^8 O_VB  
有热压工艺方面的人才或者资料分享下； <CS(c|7  
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 qB5j;@r  

高手真多！

楼主威武霸气.