[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： U:Y?2$#  
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关键点说几个： (~jOtUyT  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 2h=RNU|  
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 +mJAIjH  
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 Fq8Z:;C8  

以下是几个重要的函数： U-@\V1;C  
1.判断点在区域中函数 Cd4G&(=  
2.计算夹角函数 (j(6%U  
3.转置函数 [Mx+t3M  
4.得到区域中心点，及区域半径函数 7*sB"_U2  
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） ^Kn}{m/3Y  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 xT%CY(:9X  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ]\{EUx9  
   cax = x2 - x1 DUaj]V{_^  
   cay = y2 - y1 9BP-Iet  
   cbx = x2 - x3 ?Pa5skqR  
   cby = y2 - y3 2vynz,^ET  
   mo_jj = cax * cbx + cay * cby )gZ yW  
   mo_ca = Sqr(cax * cax + cay * cay) uKK+V6}!kj  
   mo_cb = Sqr(cbx * cbx + cby * cby) `On%1%k8  
   cos_acb = mo_jj / (mo_ca * mo_cb) ]`LMy
t0  
   'ff_cos = cos_acb YM-,L-HMA  
   If cos_acb >= 1 Then  W+e  
   nn = 0 <%!EI@
N  
   ElseIf cos_acb <= -1 Then "
lB[IB)  
   nn = 3.14159265258979 'Je;3"@  
   Else rAgb<D@,H  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) l2i[wc"9  
   End If W 5-=,t  
   'ff_angle = nn 3{CXIS  
   ff_angle = nn * 180 / 3.14159265258979 ,#nyEE  
End Function

'判断点在区域内函数 Nzf 
tc  
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 05Ak[OOU>  
Dim aob, boc, cod, doa, sum As Single B
Ki@c\Wb  
  If ppx = p1x And ppy = p1y Then 1GE[*$vuq  
     point_in = True f]Xh7m(Gh  
     Exit Function \Cx2$<8  
  End If FG/1!8F  
  If ppx = p2x And ppy = p2y Then Kqm2TMO]>V  
     point_in = True <m'W{n%Pp  
     Exit Function ;ry~x:7L7  
  End If jBb:)
  
   If ppx = p3x And ppy = p3y Then G .NGS%v  
     point_in = True ]V^ >aUlj  
     Exit Function ~m3Q^ue  
  End If n86LU Sj5  
     4}`z^P<C  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 508v:?^'  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) L xP%o  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 7v't# =  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) {\hjKP   
    sum = aob + boc + cod + doa h/k00hD60  
    If 360.01 > sum And sum > 359.99 Then sFt"2TVr3  
       point_in = True W[/Txc0$  
    Else 3N257]  
       point_in = False pLSh +*F  
    End If k'QI`@l&l  
End Function

'得到点半径,得到交点坐标函数 |P@N}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() zG{P5@:.R  
    '求得中心点坐标 Wn2'uZ5If  
Dim tt As String bb
M^J  
Dim rt(3) As Single e.\dqt~%y  
    '判断是否平行 >$,P )cB'  
   acx = p3x - p1x 1_WP\@O  
   acy = p3y - p1y SSxp!E'  
   bdx = p4x - p2x D6-R>"}  
   bdy = p4y - p2y (\ge7sE-oo  
   If acx * bdy = acy * bdx Then 1*" 7q9x  
      rt(0) = 0 e>6|# d  
      Exit Function E5!vw@,  
   Else /yHjds  
      '判断斜率存在否 hjyM xg;Q?  
      If p1x = p3x And p2x <> p4x Then d~ +(g!  
         tt = "ac_n_bd_y" djH&)&q!  
      ElseIf p1x <> p3x And p2x = p4x Then v*[UG^+)  
         tt = "ac_y_bd_n" auga`*  
      ElseIf p1x <> p3x And p2x <> p4x Then (n`] sbx  
         tt = "ac_y_bd_y" , #=TputM  
      End If Ge_fU'F  
    Select Case tt HjIIhl?UY  
         Case "ac_n_bd_y" G9NI`]k  
            'bd线段方程 nNq<x^@83  
            k_bd = bdy / bdx v4<W57oH  
            b_bd = p2y - k_bd * p2x 4GbfA .u  
            p_x = p1x LN~mKoW  
            p_y = k_bd * p_x + b_bd )X?oBNsj  
         Case "ac_y_bd_n" !KMl'kswe:  
            'ac线段方程 }f;WYz5  
            k_ac = acy / acx /5)*epF+  
            b_ac = p1y - k_ac * p1x P0yDL:X[  
            p_x = p2x 6@TU9AZS`  
            p_y = k_ac * p_x + b_ac <o/!M6^:  
        Case "ac_y_bd_y" b"uO BB  
           'ac，bd线段都要求 cI P.5)Ca  
           k_ac = acy / acx u$yXuFj/  
           b_ac = p1y - k_ac * p1x PChew3  
           k_bd = bdy / bdx
.u>[m.  
           b_bd = p2y - k_bd * p2x H1f='k]SZ  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) |Fe[RGi+8  
           p_y = k_ac * p_x + b_ac <Y."()}GeH  
        End Select k:I,$"y4  
      rt(1) = p_x Pr1qX5>=  
      rt(2) = p_y y{/7z}d  
     mFg$;F  
'计算最大半径 2HtsSS#0Q  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) u"q56}Q?]  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) hH 5}%/vF  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) K(i}?9WD  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) o!:Z?.!  
Dim bb(5) As Single XHekz
6_  
  bb(1) = rr1 kV+^1@"  
  bb(2) = rr2 }%p:Xv@X!  
  bb(3) = rr3 Qn7T{ BW  
  bb(4) = rr4 PQDLbSe)\  
  nb = rr1 
p;>A:i  
For i = 1 To 4 kh9'W<tE  
    If nb <= bb(i) Then n74\{`8]o  
       nb = bb(i) Ux7LN@4og  
    End If x>}ml\R  
Next i @>HTbs6W  
    rt(0) = Sqr(nb) [02rs@c>  
    rr = rt() b%0p<*:a/  
  End If q)i %*IY  
         UB.1xcI  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  z`zz8hK.  

eFG/!b<17  
有热压工艺方面的人才或者资料分享下； 50cVS)hG6d  
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 gJQ#j~'  

高手真多！

楼主威武霸气.