[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： ^ZX71-  
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描述:请输入描述

图片:2.jpg

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关键点说几个： Su99A.w  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） r9<OB`)3+  
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 <U(wLG'XS  
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 H^{Eh  

以下是几个重要的函数： Hd H,  
1.判断点在区域中函数 rEEoR'c6  
2.计算夹角函数 NuZiLtC  
3.转置函数 IzPnbnS}  
4.得到区域中心点，及区域半径函数 aMdWT4  
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） 7M;7jI/C  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 %0 cFs'  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single QP HibPP:  
   cax = x2 - x1 DJ)Q,l*|N9  
   cay = y2 - y1 [t#xX59  
   cbx = x2 - x3 />^sGB  
   cby = y2 - y3 g i>`  
   mo_jj = cax * cbx + cay * cby 6! `^}4  
   mo_ca = Sqr(cax * cax + cay * cay) >1luLp/,$  
   mo_cb = Sqr(cbx * cbx + cby * cby) *Ae> ,LyE  
   cos_acb = mo_jj / (mo_ca * mo_cb) )b AOA  
   'ff_cos = cos_acb {vCB$@/o  
   If cos_acb >= 1 Then Lg6;FbY?  
   nn = 0 KV&4Ep#  
   ElseIf cos_acb <= -1 Then `^_c&y K  
   nn = 3.14159265258979 C8dC_9  
   Else g~ub
ivl2  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ;5S'?fj  
   End If :Y4m3|  
   'ff_angle = nn |.]sL0;4Z  
   ff_angle = nn * 180 / 3.14159265258979 2h=QJgpCG  
End Function

'判断点在区域内函数 <D}yqq@|  
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 #E`wqI\'  
Dim aob, boc, cod, doa, sum As Single QYB66g:  
  If ppx = p1x And ppy = p1y Then W=-:<3XL  
     point_in = True #{f%b,.yxt  
     Exit Function I \Luw*:  
  End If 8%\0v?a5  
  If ppx = p2x And ppy = p2y Then e-E0Bp  
     point_in = True hiT&QJB` _  
     Exit Function b
+/z,c6w  
  End If bz'#YM  
   If ppx = p3x And ppy = p3y Then 7cMHzhk^  
     point_in = True ;rj|>  
     Exit Function Bjc<d,]  
  End If Ns2<wl-  
     tDWoQ&z2t_  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) MP6Py@J45  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ?"@`SEdnU2  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) b fj]Q  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) n[E/O}3& /  
    sum = aob + boc + cod + doa cqd}.D  
    If 360.01 > sum And sum > 359.99 Then ~~iFs ,9  
       point_in = True H*KZZTKd  
    Else +"?O2PX  
       point_in = False +{b3A@f|F  
    End If DnP "7}v  
End Function

'得到点半径,得到交点坐标函数 9%iv?/o*L  
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() #+ai G52+
 
    '求得中心点坐标 7*>(C*q=  
Dim tt As String 3uy^o  
Dim rt(3) As Single aH'=k?Of;  
    '判断是否平行 v/G)E_  
   acx = p3x - p1x Qj3l>O
 
   acy = p3y - p1y W6&mXJ^3L  
   bdx = p4x - p2x g;-6Hg'  
   bdy = p4y - p2y qA>C<NL  
   If acx * bdy = acy * bdx Then \N
a  
      rt(0) = 0 XGcl9FaO}  
      Exit Function I7]qTS[vg  
   Else 2]'cj  
      '判断斜率存在否 =u<jxV9  
      If p1x = p3x And p2x <> p4x Then L)QAI5o:3  
         tt = "ac_n_bd_y" LB\+*P6QM  
      ElseIf p1x <> p3x And p2x = p4x Then AYHefAF<w  
         tt = "ac_y_bd_n" g!
I0UAm  
      ElseIf p1x <> p3x And p2x <> p4x Then }!^`%\ %\  
         tt = "ac_y_bd_y" r"$~Gg.%(  
      End If )u>/:  
    Select Case tt pT<}n 9yB5  
         Case "ac_n_bd_y" YF$nL(  
            'bd线段方程 j}aU*p~N  
            k_bd = bdy / bdx +2JC**)I
 
            b_bd = p2y - k_bd * p2x W%P$$x5&  
            p_x = p1x X*< !_3  
            p_y = k_bd * p_x + b_bd Lgrpy  
         Case "ac_y_bd_n" 7OdJ&Gzd  
            'ac线段方程 B#, TdP]/  
            k_ac = acy / acx *T-v^ndJh  
            b_ac = p1y - k_ac * p1x PM8*/4Cu.5  
            p_x = p2x |0$7{nQ  
            p_y = k_ac * p_x + b_ac 9D{p^hd  
        Case "ac_y_bd_y" 5-! Zm]  
           'ac，bd线段都要求 d 6=Z=4w  
           k_ac = acy / acx Noi+mL  
           b_ac = p1y - k_ac * p1x gxCl=\  
           k_bd = bdy / bdx v<:/u(i  
           b_bd = p2y - k_bd * p2x ;R*tT%Z,  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 2@>#?c7  
           p_y = k_ac * p_x + b_ac
Rc#c^F<  
        End Select bF c %  
      rt(1) = p_x -`ss7j&b3  
      rt(2) = p_y f"aqg/l  
     @WnW @'*F  
'计算最大半径 4Ixu%  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) q 1~3T;Il  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ueLdjASJ  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) k{E!X  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Rd,5&X$  
Dim bb(5) As Single R=<uf:ca  
  bb(1) = rr1 qs3V2lvYw{  
  bb(2) = rr2 ,Wlw#1fP  
  bb(3) = rr3 nEfQLkb[|  
  bb(4) = rr4 x.ucsb  
  nb = rr1 ;GZ/V;S  
For i = 1 To 4 ]}d.h!`<)  
    If nb <= bb(i) Then yv2wQ_({  
       nb = bb(i) zdgSq
v  
    End If dH~i  
Next i N'=b8J-fF  
    rt(0) = Sqr(nb) VL8yL`~zc.  
    rr = rt() li  
  End If M&5De{LS}  
         j!/=w q  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  O%p+P<J  

Q}kXxud  
有热压工艺方面的人才或者资料分享下； w0YV87  
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 mH5[(?  

高手真多！

楼主威武霸气.