[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： M&T/vByTn_  
F`}w0=-*(  
64j 4P 7  

关键点说几个： Q+M3Pqy  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） kGeME   
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 Donf9]&U  
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 0J-ux"kfI  

以下是几个重要的函数： `8bp6}OD,  
1.判断点在区域中函数 g*AqFY7|  
2.计算夹角函数 bu5)~|?{t  
3.转置函数 *Yjs$'_2  
4.得到区域中心点，及区域半径函数 U}Fk%Jj  
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） G ~\$Oq8  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 |(g2fByDf  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 50`r}
s}  
   cax = x2 - x1 Z28@yD+  
   cay = y2 - y1 Ob+c*@KiW  
   cbx = x2 - x3 qeGOSGc_  
   cby = y2 - y3 9V!K._Cb  
   mo_jj = cax * cbx + cay * cby fE}}>  
   mo_ca = Sqr(cax * cax + cay * cay) QKQy)g  
   mo_cb = Sqr(cbx * cbx + cby * cby) f& *E;l0  
   cos_acb = mo_jj / (mo_ca * mo_cb) AkC\CdmA  
   'ff_cos = cos_acb ~!u94_:  
   If cos_acb >= 1 Then
BpE[9N  
   nn = 0 ?yh.*,dgi  
   ElseIf cos_acb <= -1 Then )[.URp&  
   nn = 3.14159265258979 _JoA=<O!  
   Else l6O(+*6Us  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) tO
$M[P=b  
   End If d1TG[i<J_  
   'ff_angle = nn $^F2  
   ff_angle = nn * 180 / 3.14159265258979 ]F!,Jx  
End Function

'判断点在区域内函数 )Q`<O  
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 w}?\
Q,  
Dim aob, boc, cod, doa, sum As Single jkd8M;Jw  
  If ppx = p1x And ppy = p1y Then E.brQx#}  
     point_in = True ygG9ht  
     Exit Function ~-x\E#(  
  End If J<D =\  
  If ppx = p2x And ppy = p2y Then UlR7_  
     point_in = True (;0]V+-  
     Exit Function NaIVKo  
  End If +=v|kd  
   If ppx = p3x And ppy = p3y Then ?/D#ql7  
     point_in = True O4{&B@!  
     Exit Function $onliW|  
  End If <KCgtO  
     z;)% i f6  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) &x}JC/u]fd  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) -\vq-n  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Uz6B\-(0p
 
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ~Km8-b(&  
    sum = aob + boc + cod + doa W\/0&H\i  
    If 360.01 > sum And sum > 359.99 Then *niQ*A  
       point_in = True (s~hh  
    Else v%r!}s  
       point_in = False m`|+_{4[n  
    End If /TdTo@  
End Function

'得到点半径,得到交点坐标函数 gS!M7xy  
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() B}p/
,4x6  
    '求得中心点坐标 wI:oe`?H  
Dim tt As String ie)Qsw@  
Dim rt(3) As Single H74hv`G9  
    '判断是否平行 MFVFr "  
   acx = p3x - p1x d7@ N~<n  
   acy = p3y - p1y $O[ut.  
   bdx = p4x - p2x `7NgQ*g.d/  
   bdy = p4y - p2y HHdc[pJ0D  
   If acx * bdy = acy * bdx Then 3Xy>kG}  
      rt(0) = 0 db`<E <  
      Exit Function 9P]TIV.  
   Else Z@>>ZS1Do  
      '判断斜率存在否 SngV<J>zR  
      If p1x = p3x And p2x <> p4x Then &{8 "- dw  
         tt = "ac_n_bd_y" g wk\[I`;  
      ElseIf p1x <> p3x And p2x = p4x Then i^=an?}/  
         tt = "ac_y_bd_n" m<j ^cU#J  
      ElseIf p1x <> p3x And p2x <> p4x Then /c09-$M  
         tt = "ac_y_bd_y" REa%kU  
      End If "5@Y\L  
    Select Case tt ='s2S5#1  
         Case "ac_n_bd_y" CNzK-,   
            'bd线段方程 ,5q^/h  
            k_bd = bdy / bdx P9c1NX\-  
            b_bd = p2y - k_bd * p2x zX3O_  
            p_x = p1x Ih{~?(V$  
            p_y = k_bd * p_x + b_bd 8F%TZM  
         Case "ac_y_bd_n" E3`KO'v%  
            'ac线段方程 q.#aeqKBP  
            k_ac = acy / acx ;$nK ^  
            b_ac = p1y - k_ac * p1x P0W%30Dh  
            p_x = p2x 9"/{gf3D  
            p_y = k_ac * p_x + b_ac j,Mp["X&  
        Case "ac_y_bd_y" 1r@v \#P  
           'ac，bd线段都要求 Odagaca  
           k_ac = acy / acx y`'Ly@s  
           b_ac = p1y - k_ac * p1x 1wwhTek  
           k_bd = bdy / bdx iud%X51  
           b_bd = p2y - k_bd * p2x %$b 5&>q  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) $ \jly  
           p_y = k_ac * p_x + b_ac B3K%V|;z )  
        End Select |%$d/<<PZ  
      rt(1) = p_x y:1?~R  
      rt(2) = p_y YTY0N5["  
     W0R6<- 1
 
'计算最大半径 sH6srwI  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Y5K!DMKY  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) h$lY,7  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) rBpr1XKl,  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) yp8 .\.  
Dim bb(5) As Single csYICLj  
  bb(1) = rr1 vhT9#) HI  
  bb(2) = rr2 ^E>}A  
  bb(3) = rr3 5o&L|7]  
  bb(4) = rr4 U;ev3  
  nb = rr1 P||u{]vU  
For i = 1 To 4 x`a@h\n  
    If nb <= bb(i) Then S7-?&[oeJ  
       nb = bb(i)  d+=;sJ  
    End If 0(teplo&P  
Next i d@`yRueWiV  
    rt(0) = Sqr(nb) d d8^V_Kx  
    rr = rt() I4u'b?* je  
  End If W.>yIA%  
         In
Rn!~_N  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  8M8=
uw~#  

5=5~GX-kr  
有热压工艺方面的人才或者资料分享下； 2A {k>TjQ  
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 cD]{ Nn  

高手真多！

楼主威武霸气.