[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： 4XN
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图片:2.jpg

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关键点说几个： J<-2dvq  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） -)[~%n#X+t  
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 4IXa[xAm  
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 D)bR-a_^  

以下是几个重要的函数： 4_w{
~  
1.判断点在区域中函数 !CLL{\F  
2.计算夹角函数 T^H`$;\  
3.转置函数  G`NGt_C  
4.得到区域中心点，及区域半径函数 p1fy)K2{,j  
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） ~i=5NUE  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 gkld}t*U  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single E\XD~
 
   cax = x2 - x1 H)NT2@%{P  
   cay = y2 - y1 yYvv!w+@Q  
   cbx = x2 - x3 W)2ZeH*
  
   cby = y2 - y3 qWw{c&{Q],  
   mo_jj = cax * cbx + cay * cby q[TW  
   mo_ca = Sqr(cax * cax + cay * cay) wsAijHjJI!  
   mo_cb = Sqr(cbx * cbx + cby * cby) Kr74|W=  
   cos_acb = mo_jj / (mo_ca * mo_cb) ?o_D#gG*  
   'ff_cos = cos_acb
GKf%dKL  
   If cos_acb >= 1 Then e*pYlm  
   nn = 0 7_ao?}g  
   ElseIf cos_acb <= -1 Then |oTA$bln  
   nn = 3.14159265258979 ' O d_:]  
   Else AHdh
]pfH  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) nHIW_+<Mf  
   End If k>!A~gfP~  
   'ff_angle = nn P~u~`eH*  
   ff_angle = nn * 180 / 3.14159265258979 Hb@PQ
cj  
End Function

'判断点在区域内函数 >kG: MJj  
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 $D~vuA7  
Dim aob, boc, cod, doa, sum As Single 5/4q}U3  
  If ppx = p1x And ppy = p1y Then '{:lP"\,L  
     point_in = True ~ A4_  
     Exit Function |9fGn@-  
  End If o 9{~F`{p  
  If ppx = p2x And ppy = p2y Then \,yX3R3}.~  
     point_in = True V"Y-|R  
     Exit Function _U`1BmTC2  
  End If FAF+}  
   If ppx = p3x And ppy = p3y Then bs\7 juHt  
     point_in = True ,|Lf6k  
     Exit Function xGo,x+U*  
  End If gukKa  
     S_Ug=8r4  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 2j*o[kAE  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 88M$mjx  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 'I1^70bB  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 2^T`> ?{X  
    sum = aob + boc + cod + doa a^.5cJ$]  
    If 360.01 > sum And sum > 359.99 Then 9{XC9\~
 
       point_in = True K*fh`Kz  
    Else  ylBjuD+  
       point_in = False @#KZ2^  
    End If ^{w]r5d  
End Function

'得到点半径,得到交点坐标函数 O'~;|-Z<  
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() ecG,[1];  
    '求得中心点坐标 9#ZR0t.cY  
Dim tt As String 89X`U)W
s  
Dim rt(3) As Single s'^"s_j  
    '判断是否平行 @"gWvs  
   acx = p3x - p1x B|(MxR6m  
   acy = p3y - p1y \oc*  
   bdx = p4x - p2x C le
kB  
   bdy = p4y - p2y Zm~oV?6  
   If acx * bdy = acy * bdx Then 6N {|;R@2  
      rt(0) = 0 *mTx0sQz(J  
      Exit Function =&xNdc  
   Else y7WO:X&  
      '判断斜率存在否 N)b.$aC  
      If p1x = p3x And p2x <> p4x Then MW$ X4<*KD  
         tt = "ac_n_bd_y" <u%&@G$F>  
      ElseIf p1x <> p3x And p2x = p4x Then BA t0YE`-,  
         tt = "ac_y_bd_n" v6q oH)n  
      ElseIf p1x <> p3x And p2x <> p4x Then ^-GzWT  
         tt = "ac_y_bd_y" \C.s%m  
      End If fkmN?CU{1%  
    Select Case tt zs@xw@  
         Case "ac_n_bd_y" 7.N~e}p8  
            'bd线段方程 "de3Sbj@?  
            k_bd = bdy / bdx 7lYiufg  
            b_bd = p2y - k_bd * p2x TDo!yQ  
            p_x = p1x B+8B<xZ  
            p_y = k_bd * p_x + b_bd c-gpO|4>  
         Case "ac_y_bd_n" N5\]VCX  
            'ac线段方程 /3ty*LQT  
            k_ac = acy / acx HbXYinG%  
            b_ac = p1y - k_ac * p1x `$N()P  
            p_x = p2x ,U^V]
jC  
            p_y = k_ac * p_x + b_ac !<2%N3l  
        Case "ac_y_bd_y" #)hJ.0~3  
           'ac，bd线段都要求 -AcVVK&  
           k_ac = acy / acx `;vJ\$-<  
           b_ac = p1y - k_ac * p1x MmPLJ  
           k_bd = bdy / bdx C`LHFqv  
           b_bd = p2y - k_bd * p2x ql_GN[c/  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) b6y/o48  
           p_y = k_ac * p_x + b_ac mxQPOu  
        End Select *8?0vkZZ2  
      rt(1) = p_x m^M sp:T,  
      rt(2) = p_y /$NZj"#  
     ]= nM|e  
'计算最大半径 u|}p3-z|Y  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) B(TE?[ #  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ] 3UlF'{  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 0l&#%wmJ,  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) [9U::  
Dim bb(5) As Single "Smek#l  
  bb(1) = rr1 S%t*!  
  bb(2) = rr2 ?f\ ~:Gm/  
  bb(3) = rr3 6Yu&'[?H$  
  bb(4) = rr4 { *&Wc Os  
  nb = rr1 _)U[c;^6  
For i = 1 To 4 'l7ey3B%  
    If nb <= bb(i) Then B{ptP4As-  
       nb = bb(i) V+'C71-P  
    End If $
>csm  
Next i 6b6rM%B.oD  
    rt(0) = Sqr(nb) / 80Q  
    rr = rt() @G&2Tbj[`  
  End If Z>t,B%v  
         ,6iXlch  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15) 
,JONc9  

(\o &Gl  
有热压工艺方面的人才或者资料分享下； <]wQ;14;H  
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 55K(]%t  

高手真多！

楼主威武霸气.