[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： XP"lqy
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c-L1 Bkw  

关键点说几个： 6\7bE$K  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） XjL)WgQ{i  
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 ?32gug\i'}  
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 '`#sOH  

以下是几个重要的函数： 6;WfsG5  
1.判断点在区域中函数 e5/f%4YX  
2.计算夹角函数 ?/Bp8q(  
3.转置函数 =]k0*\PS  
4.得到区域中心点，及区域半径函数 q#RUL!WF7U  
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） 1 !N+hf  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 (X=JT  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single >|{n";n&  
   cax = x2 - x1 hk6(y?#  
   cay = y2 - y1 T?vM\o%i3  
   cbx = x2 - x3 00jWs@K  
   cby = y2 - y3  GtR!a  
   mo_jj = cax * cbx + cay * cby BbU%p  
   mo_ca = Sqr(cax * cax + cay * cay) ,sw
|OYb  
   mo_cb = Sqr(cbx * cbx + cby * cby) SlU?,)J}  
   cos_acb = mo_jj / (mo_ca * mo_cb) GM_~2Er]  
   'ff_cos = cos_acb sIUhk7Cd8  
   If cos_acb >= 1 Then -|K^!G  
   nn = 0 ]Sj<1tx7f  
   ElseIf cos_acb <= -1 Then HQtR;[1  
   nn = 3.14159265258979 b 6kDkE  
   Else t zn1|  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) k }amSsE  
   End If tuT>,Bb
R  
   'ff_angle = nn z$64Ep#  
   ff_angle = nn * 180 / 3.14159265258979 /g/]Q^  
End Function

'判断点在区域内函数 eELLnU{"  
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 ]A?(OA  
Dim aob, boc, cod, doa, sum As Single M Ewa^  
  If ppx = p1x And ppy = p1y Then >X@4wP7l  
     point_in = True GZefeBi  
     Exit Function Nm{+!}cC  
  End If NUO#[7OK+x  
  If ppx = p2x And ppy = p2y Then o#Gf7.E8  
     point_in = True \wZ 4enm  
     Exit Function \wjT|z
1+Y  
  End If :)9CG!2y<M  
   If ppx = p3x And ppy = p3y Then aB_~Vh  
     point_in = True ZVX1@p  
     Exit Function hkpS}*L9o  
  End If v[Mh[CyB  
     ahh&h1q7|  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) oV/:T\Qn=  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) AU$<W"%R  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) G;ihm$Cad  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) =67ab_V  
    sum = aob + boc + cod + doa (G6lr%d  
    If 360.01 > sum And sum > 359.99 Then R$Rub/b6  
       point_in = True "lVbla4b  
    Else Yt!o Hn  
       point_in = False y&n-8L_  
    End If $x~U&a
 
End Function

'得到点半径,得到交点坐标函数 SgWLs%B  
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() M7fPaJKL  
    '求得中心点坐标 +Pc2`,pw|  
Dim tt As String %jo,
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Dim rt(3) As Single pzT,fmfk  
    '判断是否平行 F! [Gj%~I  
   acx = p3x - p1x Dnl|B\  
   acy = p3y - p1y 7](aPm8  
   bdx = p4x - p2x mIe 5{.m#  
   bdy = p4y - p2y z8dBfA<z  
   If acx * bdy = acy * bdx Then tXCgRU  
      rt(0) = 0 \nUJ)w  
      Exit Function M?00n< vM  
   Else 2Rqpok4  
      '判断斜率存在否 <lZVEg  
      If p1x = p3x And p2x <> p4x Then `l'Ine11  
         tt = "ac_n_bd_y" |;
(>q  
      ElseIf p1x <> p3x And p2x = p4x Then a"{b}UP  
         tt = "ac_y_bd_n" e>UU/Ks  
      ElseIf p1x <> p3x And p2x <> p4x Then I{$TMkh[  
         tt = "ac_y_bd_y" 0}`0!Kv  
      End If 6T5\zInd  
    Select Case tt l h?[wc  
         Case "ac_n_bd_y" %0zp`'3Y  
            'bd线段方程 1j]vJ4R_\  
            k_bd = bdy / bdx 8]i7wq#=  
            b_bd = p2y - k_bd * p2x M_O)w^ '  
            p_x = p1x $WiUoS  
            p_y = k_bd * p_x + b_bd )+Yu7
=S  
         Case "ac_y_bd_n" 9T\\hM)k  
            'ac线段方程 zWrynJ}s  
            k_ac = acy / acx kpRk.Q*  
            b_ac = p1y - k_ac * p1x x21XzGLY|}  
            p_x = p2x x9o(q`N  
            p_y = k_ac * p_x + b_ac o]eG+i6g]  
        Case "ac_y_bd_y" gDjAnz#  
           'ac，bd线段都要求 6"9(ce KX  
           k_ac = acy / acx ,T-xuNYC  
           b_ac = p1y - k_ac * p1x -nZDFC8y$  
           k_bd = bdy / bdx _4 YT2k  
           b_bd = p2y - k_bd * p2x GBTwQYF  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) CHVAs9mrNB  
           p_y = k_ac * p_x + b_ac I%jlM0ZUI"  
        End Select GF36G?iEi  
      rt(1) = p_x t:P]G>)x|  
      rt(2) = p_y jItVAmC=i  
     .IsOU  
'计算最大半径 T3Sz<K$E  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) hT
% >)71  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ,=[r6k<  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) !Ld[`d.|R!  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) <r)5jf  
Dim bb(5) As Single E_0i9  
  bb(1) = rr1 y,6KU$G  
  bb(2) = rr2 NOFH  
  bb(3) = rr3 Q$5%9  
  bb(4) = rr4 N+vsQ!Qz  
  nb = rr1 jw)c|%r>  
For i = 1 To 4 CropHB/t  
    If nb <= bb(i) Then xg4wtfAbS  
       nb = bb(i) ./<giTR:p  
    End If {5 3#Xd  
Next i EgRuB@lw76  
    rt(0) = Sqr(nb) T[-Tqi NT  
    rr = rt() \0)2 u[7  
  End If F5+!Gb En  
         /Ri-iC >  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  \JGRd8S[  

<$`udP@  
有热压工艺方面的人才或者资料分享下； l5_%Q+E_  
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 MP`WU}2  

高手真多！

楼主威武霸气.