[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： Nbpn"*L,  
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关键点说几个： sv=U^xI  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） m%[e_eS  
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 w.x&3aG  
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 "A}sD7xy9  

以下是几个重要的函数： qYA~Os1e  
1.判断点在区域中函数 %nZ:)J>kz  
2.计算夹角函数 #sw4)*v  
3.转置函数 9-pt}U  
4.得到区域中心点，及区域半径函数 "TA0--6  
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） CV @P +  
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#la'ICwJ  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single =^KgNQ   
   cax = x2 - x1 1Vu#:6%  
   cay = y2 - y1 ^VXhv9\>B  
   cbx = x2 - x3 @-sWXz*W  
   cby = y2 - y3 uHKEt[PS$  
   mo_jj = cax * cbx + cay * cby ooVs8T2  
   mo_ca = Sqr(cax * cax + cay * cay) xxur4@p!  
   mo_cb = Sqr(cbx * cbx + cby * cby) FaeKDbLJr  
   cos_acb = mo_jj / (mo_ca * mo_cb) R;!,(l  
   'ff_cos = cos_acb {32m&a  
   If cos_acb >= 1 Then / dJz?0  
   nn = 0  tKV,  
   ElseIf cos_acb <= -1 Then (\F9_y,6*\  
   nn = 3.14159265258979 #Nh'1@@  
   Else (F&LN!Hn>p  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) bA)nWWSg=  
   End If yUnV%@.  
   'ff_angle = nn J9[7AiEd(/  
   ff_angle = nn * 180 / 3.14159265258979 86=W}eV1r  
End Function

'判断点在区域内函数 i M !`4  
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 X<,QSTP  
Dim aob, boc, cod, doa, sum As Single 9E
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  If ppx = p1x And ppy = p1y Then 5!?5S$>  
     point_in = True I(*3n"  
     Exit Function r.eK;  
  End If Ikdj?"+O  
  If ppx = p2x And ppy = p2y Then [\W&  
     point_in = True cANt7  
     Exit Function KM;H '~PZi  
  End If P\MDD@  
   If ppx = p3x And ppy = p3y Then Pg8.RvmQ  
     point_in = True 6=/sEzS'  
     Exit Function uP* kvi:e  
  End If VNTbjn
]  
     r,JQR)l0@V  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Z9DfwWI2nu  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ` Tap0V  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) @/:4beh  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 84WDR?  
    sum = aob + boc + cod + doa Ro]Z9C>1o  
    If 360.01 > sum And sum > 359.99 Then bW=q G  
       point_in = True (?Mn_FNE|  
    Else %4LoEm=U  
       point_in = False i3eF_  
    End If &ww-t..  
End Function

'得到点半径,得到交点坐标函数 8|zavH#P  
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() %e]G]B%  
    '求得中心点坐标 OdFF)-K>~  
Dim tt As String ^W$R{`  
Dim rt(3) As Single z0rYzn?M
R  
    '判断是否平行 b,+Sa
\j)(  
   acx = p3x - p1x LL e*|:  
   acy = p3y - p1y ];k!*l
R)  
   bdx = p4x - p2x a_c(7bQ  
   bdy = p4y - p2y *F%1~  
   If acx * bdy = acy * bdx Then R:f!ywj%  
      rt(0) = 0 hZ1enej)  
      Exit Function /''=V.-N  
   Else )!-gT  
      '判断斜率存在否 y-26\eY^P  
      If p1x = p3x And p2x <> p4x Then OM1Z}%
J  
         tt = "ac_n_bd_y" q7lC}'2fu  
      ElseIf p1x <> p3x And p2x = p4x Then +UDt2  
         tt = "ac_y_bd_n" 5! );4+  
      ElseIf p1x <> p3x And p2x <> p4x Then Zy+ERaF|]  
         tt = "ac_y_bd_y" F{jxs/~  
      End If y>=YMD  
    Select Case tt $=.%IJ_MAz  
         Case "ac_n_bd_y" |Lg2;P7\  
            'bd线段方程 /C8}5)  
            k_bd = bdy / bdx ?TpjU*Cxy  
            b_bd = p2y - k_bd * p2x  lPZ>#  
            p_x = p1x ow \EL  
            p_y = k_bd * p_x + b_bd \=WPJm`p  
         Case "ac_y_bd_n" `R2Iw I&  
            'ac线段方程 8p 4[:M@  
            k_ac = acy / acx RK.lzVaY  
            b_ac = p1y - k_ac * p1x }ex4dhx2M  
            p_x = p2x $\ZWQct  
            p_y = k_ac * p_x + b_ac N
*36rR$^  
        Case "ac_y_bd_y" `n>|rd  
           'ac，bd线段都要求 ^>an4UJt  
           k_ac = acy / acx `F/R:!v  
           b_ac = p1y - k_ac * p1x ;-`NT` #2  
           k_bd = bdy / bdx  x(HHy,  
           b_bd = p2y - k_bd * p2x 68
P'<|u?  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) nT> v  
           p_y = k_ac * p_x + b_ac l1T`[2  
        End Select MxpAh<u!vF  
      rt(1) = p_x C"kfxpCi  
      rt(2) = p_y )K?7(H/j  
     LN+x!#:e  
'计算最大半径 ]D;*2Lw4&  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ?Ojv<L-f.:  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) D4c'6WGb@  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) B{=DnB6  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) d_we?DZ|  
Dim bb(5) As Single C:No ^nH>  
  bb(1) = rr1 K W&muD  
  bb(2) = rr2 iT&4;W=72~  
  bb(3) = rr3 s3sRMB2  
  bb(4) = rr4 )&T 5/+  
  nb = rr1 Jw5@#
j  
For i = 1 To 4 %P~;>4i,  
    If nb <= bb(i) Then
v_Vw!u  
       nb = bb(i) wL~AL  
    End If c<Cf|W  
Next i ?ja%*0 R  
    rt(0) = Sqr(nb) k}:;`ST  
    rr = rt() 5{(4%  
  End If F)~>4>hPr  
         ;-"!
p  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  H0tu3Pqk  

1P*GIt2L  
有热压工艺方面的人才或者资料分享下； }R}M>^(R4  
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 ^W=hs9a+F  

高手真多！

楼主威武霸气.