[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： XOU$3+8q5  
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图片:2.jpg

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关键点说几个： vDvGT<d  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） >cL2PN_y  
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 $twF93u$  
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 "M &4c:cz  

以下是几个重要的函数： RC%r7K f  
1.判断点在区域中函数 @x +#ZD(  
2.计算夹角函数 Lm#d.AD)  
3.转置函数 1A-EP@# J  
4.得到区域中心点，及区域半径函数 [rU8 #4.  
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） &S]v+wF  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 );H[lKy  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single T]-~?;Jh8  
   cax = x2 - x1 >+8I =S  
   cay = y2 - y1 P@`"MNS  
   cbx = x2 - x3 ygt)7f5  
   cby = y2 - y3 u6T?oK9j  
   mo_jj = cax * cbx + cay * cby ;NeEgqW"
 
   mo_ca = Sqr(cax * cax + cay * cay) /j@ `aG(a  
   mo_cb = Sqr(cbx * cbx + cby * cby) rxeXz<  
   cos_acb = mo_jj / (mo_ca * mo_cb) JZxF)]^  
   'ff_cos = cos_acb ~la04wR28  
   If cos_acb >= 1 Then \ZZy`/~z*7  
   nn = 0 ^VPl>jTg  
   ElseIf cos_acb <= -1 Then :9#{p^:o  
   nn = 3.14159265258979 gi@ji-10  
   Else ?I#hrv@  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 1R9?[RE  
   End If ?^4sE-C6  
   'ff_angle = nn [:@?,?V\N  
   ff_angle = nn * 180 / 3.14159265258979 <W') ~o}  
End Function

'判断点在区域内函数 a;(zH*/XK  
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 x`vs-Y:P  
Dim aob, boc, cod, doa, sum As Single $=xQX  
  If ppx = p1x And ppy = p1y Then ~
(OIo7#;  
     point_in = True ]Ja8i%LjOG  
     Exit Function lA-!~SM v"  
  End If - :z5m+  
  If ppx = p2x And ppy = p2y Then B&kT#  
     point_in = True zTT  
     Exit Function C_ZD<UPA\  
  End If m{dyVE  
   If ppx = p3x And ppy = p3y Then sxwW9_C  
     point_in = True Zbh]SF{3F  
     Exit Function @EOR]^?!]  
  End If -<JBKPtA  
     ;VlZd*M?  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) |$?Ux,(6  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) VSpt&19  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 7r[%|:  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) tDHHQ  
    sum = aob + boc + cod + doa }>X\"  
    If 360.01 > sum And sum > 359.99 Then ^~<Rzq!  
       point_in = True [^}>AC*im  
    Else s?x>Yl %  
       point_in = False ka)LK@p6  
    End If X>Xp&o  
End Function

'得到点半径,得到交点坐标函数 {.3  
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() JQ/t, v$G  
    '求得中心点坐标 j*La,iF  
Dim tt As String S|q!? /jqj  
Dim rt(3) As Single i B!hEbz  
    '判断是否平行 2~&hstd%  
   acx = p3x - p1x 9oz(=R  
   acy = p3y - p1y qM1)3.)[:  
   bdx = p4x - p2x $]H=  
   bdy = p4y - p2y `f6)Q`n  
   If acx * bdy = acy * bdx Then <f.>jjwFE  
      rt(0) = 0
yLgKS8b  
      Exit Function 4%!{?[$  
   Else ,v}?{pc  
      '判断斜率存在否 0ve`  
      If p1x = p3x And p2x <> p4x Then ,P@/=I5  
         tt = "ac_n_bd_y" >)n4sMq  
      ElseIf p1x <> p3x And p2x = p4x Then #mRFUA  
         tt = "ac_y_bd_n" LE<u&
9I\  
      ElseIf p1x <> p3x And p2x <> p4x Then R7B,Q(q2-  
         tt = "ac_y_bd_y" y  KYP  
      End If txml*/zL  
    Select Case tt ^YG7dd_  
         Case "ac_n_bd_y" Hw?2XDv j  
            'bd线段方程 Clt5  
            k_bd = bdy / bdx Jny)uo8  
            b_bd = p2y - k_bd * p2x  M<Wn]}7!  
            p_x = p1x ovDJ{3L6O  
            p_y = k_bd * p_x + b_bd Q$3\ /mz  
         Case "ac_y_bd_n" 4z9#M;qT  
            'ac线段方程 aVQSN  
            k_ac = acy / acx (zs4#ja2,  
            b_ac = p1y - k_ac * p1x ljYpMv.>xG  
            p_x = p2x q[)q|R|  
            p_y = k_ac * p_x + b_ac |k`f/*  
        Case "ac_y_bd_y" ~&DB!

6*  
           'ac，bd线段都要求 XVrm3aj(m  
           k_ac = acy / acx R81{<q'%X  
           b_ac = p1y - k_ac * p1x SE;Tujwhqi  
           k_bd = bdy / bdx )+n,5W  
           b_bd = p2y - k_bd * p2x qY$*#*Q
  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac)
hgweNRTh!  
           p_y = k_ac * p_x + b_ac 15xd~V?ai:  
        End Select =f4[=C$&`  
      rt(1) = p_x ':4}O#  
      rt(2) = p_y r=~WMDCz@  
     $hjP}- oUX  
'计算最大半径 Lj&1K~U  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) VqK%^  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Fl_dzh,E  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) n+{HNr  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) I*A0?{  
Dim bb(5) As Single t."g\;  
  bb(1) = rr1 <%d51~@={I  
  bb(2) = rr2
?Oy'awf_  
  bb(3) = rr3 bBUbw*DF)  
  bb(4) = rr4 w4e%-Ln  
  nb = rr1 t&GA6ML#s  
For i = 1 To 4 hrs#ZZ:E  
    If nb <= bb(i) Then 8K\'Z  
       nb = bb(i) < /;Q8;
0  
    End If 4F05(R8k  
Next i vKNt$]p
m=  
    rt(0) = Sqr(nb) 0jxO |N2)  
    rr = rt() I1Hw"G"&  
  End If omM&{ }8g  
         W@I 02n2H  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  "< v\M85&  

bp#:UUO%S  
有热压工艺方面的人才或者资料分享下；
} ^i b  
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 ,|+Gls  

高手真多！

楼主威武霸气.