[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： zBWn*A[4  
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关键点说几个： Y5fwmH,a-  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Le"$ksu>  
2.需要定义光轴的方向；简便的方法就是指定光源坐标，及网点区域坐标，这样光轴就确定了 /N+*=LIK I  
3.网点区域密度可调；把区域分成若干小块，每块的密度不同即可 8$<jd^w  

以下是几个重要的函数： y4s]*?Wz  
1.判断点在区域中函数 w\KO1 Ob  
2.计算夹角函数 g7@G&Ro9J\  
3.转置函数 zDY!0QZLF\  
4.得到区域中心点，及区域半径函数 G8OLx+!0e  
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） } pE<P;\]k  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 aH'Sz'|E  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single roYoxF;\  
   cax = x2 - x1 #R<4K0Xan  
   cay = y2 - y1 =7ul
,  
   cbx = x2 - x3 ?B@(W(
I  
   cby = y2 - y3 Ee;&;Q,O.z  
   mo_jj = cax * cbx + cay * cby @U'I_`LL  
   mo_ca = Sqr(cax * cax + cay * cay) .)|r!X  
   mo_cb = Sqr(cbx * cbx + cby * cby) fdGls`H  
   cos_acb = mo_jj / (mo_ca * mo_cb) #+V-65v  
   'ff_cos = cos_acb sL]KBux  
   If cos_acb >= 1 Then p't>'
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   nn = 0 54s+4R FL  
   ElseIf cos_acb <= -1 Then d:}aFP[  
   nn = 3.14159265258979 |=2E?&%?  
   Else Xu $_%+46  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) <Hl.MS  
   End If Bh?K_{
e  
   'ff_angle = nn p< Emy%  
   ff_angle = nn * 180 / 3.14159265258979 4Mi~eL%D (  
End Function

'判断点在区域内函数 )B.NV<m  
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 I)I,{
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Dim aob, boc, cod, doa, sum As Single 0G?0 Bo  
  If ppx = p1x And ppy = p1y Then 26un=  
     point_in = True +"rZ<i  
     Exit Function ?kvkkycI  
  End If p>7!"RF:U  
  If ppx = p2x And ppy = p2y Then JnE
\E(ez  
     point_in = True ;|&Ak_I2G  
     Exit Function '|Dm\cy  
  End If +
[@Ug`5M  
   If ppx = p3x And ppy = p3y Then pH5"g"e1  
     point_in = True FC+K2Yf1=0  
     Exit Function =FUORj\O  
  End If =o]V!MW  
     MB;<F  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) -I4-K%%B`  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 1c_qNI;:p  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) afOb-G$d=  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 8&:  *<  
    sum = aob + boc + cod + doa G m40u/  
    If 360.01 > sum And sum > 359.99 Then ) '"@L7U  
       point_in = True nV'~uu  
    Else 1V(tt{  
       point_in = False ] )D\ws)a9  
    End If pv1J6  
End Function

'得到点半径,得到交点坐标函数 ~_=ohb{  
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() x"0*U9f  
    '求得中心点坐标 A;Rr#q<  
Dim tt As String mle"!*  
Dim rt(3) As Single M?pu7wa  
    '判断是否平行 }TD$!  
   acx = p3x - p1x NFTEp0eP  
   acy = p3y - p1y /Y|oDfv  
   bdx = p4x - p2x CI$pPY<u1  
   bdy = p4y - p2y JK
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   If acx * bdy = acy * bdx Then 3l"7$B  
      rt(0) = 0 &A>Hq/Y  
      Exit Function I4 dS,h  
   Else xgP/BK2"  
      '判断斜率存在否 3#vhQ*xU  
      If p1x = p3x And p2x <> p4x Then RkP g&R;i  
         tt = "ac_n_bd_y" 7KU/ 1l9$9  
      ElseIf p1x <> p3x And p2x = p4x Then :FOMRrf7.  
         tt = "ac_y_bd_n" ;i|V++$_  
      ElseIf p1x <> p3x And p2x <> p4x Then 1MV\Jm  
         tt = "ac_y_bd_y" lgp-/O"T  
      End If odAeBQy  
    Select Case tt %9hzz5#  
         Case "ac_n_bd_y" [|<2BQX  
            'bd线段方程 w8i"-SE  
            k_bd = bdy / bdx dE9xan  
            b_bd = p2y - k_bd * p2x Vh1{8'GQ  
            p_x = p1x +4U?*:n  
            p_y = k_bd * p_x + b_bd HVG9 C$  
         Case "ac_y_bd_n" Mrpn^C2)  
            'ac线段方程 .z7%74p  
            k_ac = acy / acx to@ O  
            b_ac = p1y - k_ac * p1x ImQ?<g8$  
            p_x = p2x !DFT}eu  
            p_y = k_ac * p_x + b_ac v~i/e+.h>y  
        Case "ac_y_bd_y" ~ldqg2c  
           'ac，bd线段都要求 #:"F-3A0  
           k_ac = acy / acx 9qxB/5d_  
           b_ac = p1y - k_ac * p1x 2OFrv=F  
           k_bd = bdy / bdx #xZ7%   
           b_bd = p2y - k_bd * p2x |4NH}XVYJ>  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) `PK1zS
r  
           p_y = k_ac * p_x + b_ac 7A@GNA  
        End Select =w='qjh  
      rt(1) = p_x cSy{*K{B  
      rt(2) = p_y !U38aHG  
     ZnDI J&S  
'计算最大半径 {p&M(
W]  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) >-fOkOWXy  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) t~m >\(&  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) p<IMWe'tP  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) /-BKdkBCpZ  
Dim bb(5) As Single Nb/W+& y  
  bb(1) = rr1 Q$Y ]KV  
  bb(2) = rr2 lrg3n[y-l  
  bb(3) = rr3 CC,_I>t  
  bb(4) = rr4 $OMTk
 
  nb = rr1 H(bR@Qok  
For i = 1 To 4 `!{m#BBT}  
    If nb <= bb(i) Then 1s5FjD?M  
       nb = bb(i) & yFS  
    End If ,YzrqVY  
Next i Cisv**9  
    rt(0) = Sqr(nb) GZgu1YR
 
    rr = rt() 92g#QZs&W  
  End If P)bS ;w\(Y  
         w~EBm=v_>  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  X}XTEk3[  

+n#(QOz  
有热压工艺方面的人才或者资料分享下； k 4|*t}o7  
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 }6YD5?4  

高手真多！

楼主威武霸气.