[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： uF[*@N  
!5h8sD;  
>\~Er@  

关键点说几个： Gj%q:[r  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） PJ&L7  
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 Dk$<fMS,7c  
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 \b6{u6?+  

以下是几个重要的函数： sSwY!";  
1.判断点在区域中函数 IC8%E3
 
2.计算夹角函数 ~:0w%  
3.转置函数 zkqn>  
4.得到区域中心点，及区域半径函数 f52P1V]  
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） f9<"  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ":s_O.  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single .,#H]?Wil  
   cax = x2 - x1 X's<+hK&  
   cay = y2 - y1 <-N2<sl  
   cbx = x2 - x3 u3,O)[qV  
   cby = y2 - y3 lsO
fpJ  
   mo_jj = cax * cbx + cay * cby v[8+fd)}S  
   mo_ca = Sqr(cax * cax + cay * cay) /K1cP>oE  
   mo_cb = Sqr(cbx * cbx + cby * cby) 53a
^9  
   cos_acb = mo_jj / (mo_ca * mo_cb) q~W:W}z  
   'ff_cos = cos_acb UuF(n$B  
   If cos_acb >= 1 Then "dDrw ]P;  
   nn = 0 Ar,n=obG  
   ElseIf cos_acb <= -1 Then f.66N9BHL,  
   nn = 3.14159265258979 7OG:G z+)x  
   Else Su?cC/  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) >nih:5J,ja  
   End If kcg\f@d$  
   'ff_angle = nn &|RTLGwX  
   ff_angle = nn * 180 / 3.14159265258979 7:b.c  
End Function

'判断点在区域内函数 Qs59IZ  
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 gM=:80  
Dim aob, boc, cod, doa, sum As Single &{+0a[rN  
  If ppx = p1x And ppy = p1y Then qdv O>k3  
     point_in = True yrfV&C%=n  
     Exit Function 2E!~RjxSY  
  End If '/@wk#,  
  If ppx = p2x And ppy = p2y Then fHH  
     point_in = True ?7LvJ8  
     Exit Function |}UkVLc_^  
  End If ,R<9yEWm  
   If ppx = p3x And ppy = p3y Then o,*D8[  
     point_in = True /"j3B\`?  
     Exit Function  73Jm  
  End If GfEWms8z  
     0NC70+4L  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) y*-_  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) h3 XSt  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ^rP]B-)  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ,%l}TSs  
    sum = aob + boc + cod + doa <"P-7/j3j  
    If 360.01 > sum And sum > 359.99 Then PS[ C!s&KE  
       point_in = True \I523$a  
    Else 9CeR^/i  
       point_in = False hp9U   
    End If xSK#ovH2  
End Function

'得到点半径,得到交点坐标函数 %60 OS3  
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() B<m0YD?>~>  
    '求得中心点坐标 jj2\;b:a0  
Dim tt As String RK|*yt"f"  
Dim rt(3) As Single 5j1d=h  
    '判断是否平行 wLXJ?iy3  
   acx = p3x - p1x KBN% TqH|  
   acy = p3y - p1y %(lO>4>|  
   bdx = p4x - p2x }a6t<m`V  
   bdy = p4y - p2y bP9ly9FH  
   If acx * bdy = acy * bdx Then {a:05Y  
      rt(0) = 0 Kh(`6 f  
      Exit Function *<($.c  
   Else d)YlD]I  
      '判断斜率存在否 j"69uj` R  
      If p1x = p3x And p2x <> p4x Then \BXzmok  
         tt = "ac_n_bd_y" CG=c@-"n/  
      ElseIf p1x <> p3x And p2x = p4x Then ls]N&!/hq  
         tt = "ac_y_bd_n" 3$k#bC  
      ElseIf p1x <> p3x And p2x <> p4x Then +)jll#}?  
         tt = "ac_y_bd_y" 0Lxz?R x]<  
      End If IL %]4,  
    Select Case tt qM(}|fMbN  
         Case "ac_n_bd_y" x^f)I|t  
            'bd线段方程 .w.:o2L  
            k_bd = bdy / bdx =79R;|5  
            b_bd = p2y - k_bd * p2x |0y#} |/  
            p_x = p1x ns8s2kYcm  
            p_y = k_bd * p_x + b_bd !-f Bw  
         Case "ac_y_bd_n" Pj-INc96  
            'ac线段方程 3N+lWuE}K  
            k_ac = acy / acx !rM~  
            b_ac = p1y - k_ac * p1x K}R+~<bIY  
            p_x = p2x U4pIRa)S  
            p_y = k_ac * p_x + b_ac |HAJDhM,l  
        Case "ac_y_bd_y" e /JQ #A  
           'ac，bd线段都要求 A]/o-S_  
           k_ac = acy / acx -[V-f> :  
           b_ac = p1y - k_ac * p1x ump~)?_B  
           k_bd = bdy / bdx lrT2*$ w3  
           b_bd = p2y - k_bd * p2x Nujnm$!,Q  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 3`HK^((o  
           p_y = k_ac * p_x + b_ac yJm"vN  
        End Select \beO5]KS<  
      rt(1) = p_x pSw/QO9  
      rt(2) = p_y 0Z9DewwP  
     RwWg:4  
'计算最大半径 8-#%l~dr  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) d,"LZ>hNY*  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Q6@<7E]y  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) (CmK>"C+  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ATNOb  
Dim bb(5) As Single /fr>Fd  
  bb(1) = rr1 iEr,ly  
  bb(2) = rr2 pE
4a~:  
  bb(3) = rr3 Z',!LK!  
  bb(4) = rr4 0CrsZtX  
  nb = rr1 _/s"VYFZ  
For i = 1 To 4 g>@JGzMLP  
    If nb <= bb(i) Then 9oWU]A\k>  
       nb = bb(i) x<NPp&GE  
    End If zH8E,)  
Next i Wy}I"q[~So  
    rt(0) = Sqr(nb) |^pev2g  
    rr = rt() Eah6"j!B8n  
  End If E $@W~).!  
         Lx^ eaP5  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  -+9[X*VCc  

WA{igj@\  
有热压工艺方面的人才或者资料分享下； GN.Oa$  
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 A]1Nm3@  

高手真多！

楼主威武霸气.