[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： "+s#!Fh *  

eA&hiAP/  
h{.KPK\  

关键点说几个： }uWJ  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） qf+jfc(Iby  
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 ,Ihuo5>/z  
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 +] B  

以下是几个重要的函数： '*!R gbj;  
1.判断点在区域中函数 - t4"BD  
2.计算夹角函数 nFW^^v<  
3.转置函数 <qZXpQ#  
4.得到区域中心点，及区域半径函数 B P
"PUl:  
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） ]l+Bg;F#V  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 C-qsyJgZy  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single "+_]N9%)  
   cax = x2 - x1
GWjKZ1p  
   cay = y2 - y1 8jqt=}b  
   cbx = x2 - x3 Cd'P  
   cby = y2 - y3 'nP'MA9b;a  
   mo_jj = cax * cbx + cay * cby ;VK;_d  
   mo_ca = Sqr(cax * cax + cay * cay) '`"LX!"ZO  
   mo_cb = Sqr(cbx * cbx + cby * cby) @M#2T  
   cos_acb = mo_jj / (mo_ca * mo_cb) \*LMc69  
   'ff_cos = cos_acb Sx;zvc  
   If cos_acb >= 1 Then ;DC0LJ  
   nn = 0 ?MKf=!w  
   ElseIf cos_acb <= -1 Then :m8ED[9b  
   nn = 3.14159265258979 KrMIJA4>  
   Else }S*6+4  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ^eM=h
 
   End If )@eBe^  
   'ff_angle = nn PC\Xm,,  
   ff_angle = nn * 180 / 3.14159265258979 [w=x0J&  
End Function

'判断点在区域内函数 f@LUp^Z/v  
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 LvWU %
?  
Dim aob, boc, cod, doa, sum As Single =v:_N.Fh-c  
  If ppx = p1x And ppy = p1y Then QMtt:f]?i  
     point_in = True ATnD~iACY  
     Exit Function ]2h[.qa  
  End If wW%I <M  
  If ppx = p2x And ppy = p2y Then v[Q)cqj/  
     point_in = True am%qlN<  
     Exit Function K"}Dbr  
  End If Q~xR'G[N  
   If ppx = p3x And ppy = p3y Then 7y[B[$P  
     point_in = True +D h=D*  
     Exit Function ]m4LY.SQ  
  End If //J:p,AF  
     T&R`s+7  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) vnN_csJ#^  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) U">OdoZ,E+  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) @=;6:akz`  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 'h81\SKFK9  
    sum = aob + boc + cod + doa Lvp/} /H/  
    If 360.01 > sum And sum > 359.99 Then +Og O<P  
       point_in = True +uT=Wb \  
    Else _I8-0DnOM  
       point_in = False iGhapD  
    End If ZzKn,+  
End Function

'得到点半径,得到交点坐标函数 JBwTmOvQ  
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() H!Od.$ZIX  
    '求得中心点坐标 ALwuw^+  
Dim tt As String }`MO}Pz  
Dim rt(3) As Single ]Yj>~k:K  
    '判断是否平行 {c J6Lq&  
   acx = p3x - p1x )a}5\
V  
   acy = p3y - p1y 9.@(&  
   bdx = p4x - p2x #>,cc?H-  
   bdy = p4y - p2y n-=\n6"P  
   If acx * bdy = acy * bdx Then +p[~hM6?  
      rt(0) = 0 <N*>9S,}  
      Exit Function >ciq4H43Q|  
   Else \ bhok   
      '判断斜率存在否 srS
TQ\l4  
      If p1x = p3x And p2x <> p4x Then 1]<!Xuk^f  
         tt = "ac_n_bd_y" YL.z|{\e  
      ElseIf p1x <> p3x And p2x = p4x Then $YC~02{  
         tt = "ac_y_bd_n" {jVFlKP>  
      ElseIf p1x <> p3x And p2x <> p4x Then G8&'*7Bb  
         tt = "ac_y_bd_y" ]S:@=9JB'  
      End If kzmt'/L8  
    Select Case tt y{"E)YY  
         Case "ac_n_bd_y" \%C[l  
            'bd线段方程 +sI.GWQ_:  
            k_bd = bdy / bdx UQ8x#(`ak  
            b_bd = p2y - k_bd * p2x P~ykC{nD  
            p_x = p1x U\ L"\N7  
            p_y = k_bd * p_x + b_bd R#`itIYh  
         Case "ac_y_bd_n" q)~qd$yMS  
            'ac线段方程 N:<O  
            k_ac = acy / acx 5_`}
$"<~  
            b_ac = p1y - k_ac * p1x W"*R#:Q  
            p_x = p2x 6Te}"t>  
            p_y = k_ac * p_x + b_ac Y;w]u_  
        Case "ac_y_bd_y" VZ,T`8"  
           'ac，bd线段都要求 zb" hy"hKw  
           k_ac = acy / acx br;G5^j3?  
           b_ac = p1y - k_ac * p1x ${+.1"/[  
           k_bd = bdy / bdx vhHMxOZ;  
           b_bd = p2y - k_bd * p2x 93J)9T  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) }"-r;i  
           p_y = k_ac * p_x + b_ac `[KhG)Y7t  
        End Select p4t)Z#0  
      rt(1) = p_x lP e$AI  
      rt(2) = p_y -1:Z^&e/  
     HFr3(gNj@  
'计算最大半径 [z~Nw#  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) nADd,|xD3  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) !.9vW&t  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) FNuu',:  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) wb[(_@eZ  
Dim bb(5) As Single @>]3xHE6#=  
  bb(1) = rr1 
kut|A  
  bb(2) = rr2 Q8x{V_Pot  
  bb(3) = rr3 /;4MexgB%  
  bb(4) = rr4 M@kZ(Rkv  
  nb = rr1 H1nQ.P]_  
For i = 1 To 4 F4Uk+|]Bu  
    If nb <= bb(i) Then 1 =<|h  
       nb = bb(i) 'EV *-_k  
    End If %?hLo8  
Next i ku?_/-ko]  
    rt(0) = Sqr(nb) .@Uz/j?>  
    rr = rt() _|ib@Xbin  
  End If 9C;Y5E~'L  
         B:~;7A\  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Kwl qi]~  

E[3
FdX8  
有热压工艺方面的人才或者资料分享下； 2r}uE
\GN  
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 NnLhJPh  

高手真多！

楼主威武霸气.