[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： K!/"&RjW.  
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关键点说几个： ;SAurG$  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） <7HVkAa  
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 {9sA'5  
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 ta]B9&c  

以下是几个重要的函数： fUQuEh5_  
1.判断点在区域中函数 "p>$^   
2.计算夹角函数 )(~s-x^\z@  
3.转置函数 8Xpf|?.  
4.得到区域中心点，及区域半径函数 \u@4eBAV  
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） CW*Kd
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6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 RAMkTS  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ?>b>LDpx?  
   cax = x2 - x1 Uc,D&Og  
   cay = y2 - y1 H..g2;
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   cbx = x2 - x3 / fBi9=}+  
   cby = y2 - y3 P7GuFn/p~2  
   mo_jj = cax * cbx + cay * cby n%;wQ^  
   mo_ca = Sqr(cax * cax + cay * cay) SS?^-BI  
   mo_cb = Sqr(cbx * cbx + cby * cby) 9(?9yFbj5  
   cos_acb = mo_jj / (mo_ca * mo_cb) W7I.S5  
   'ff_cos = cos_acb ]
v=*WK  
   If cos_acb >= 1 Then qzk/P1{-  
   nn = 0 Q 6djfEN>  
   ElseIf cos_acb <= -1 Then 0TA{E-A   
   nn = 3.14159265258979 ~hi\*W6jg  
   Else );T0n  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) }{>)2S  
   End If \7W>3  
   'ff_angle = nn r[xj,eIb  
   ff_angle = nn * 180 / 3.14159265258979 +a$'<GvP  
End Function

'判断点在区域内函数 .FUws  
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 3IXai)6U  
Dim aob, boc, cod, doa, sum As Single D^cv 8 8<  
  If ppx = p1x And ppy = p1y Then )?35!s6  
     point_in = True HUF],[N  
     Exit Function u{#}Lo>B #  
  End If 0V*B3V<  
  If ppx = p2x And ppy = p2y Then zrt\]h+  
     point_in = True E'3=qTbiD  
     Exit Function /Y=Cg%+  
  End If <9zzjgzG{c  
   If ppx = p3x And ppy = p3y Then hY$gzls4  
     point_in = True : utY4  
     Exit Function ;pk4Voo$  
  End If uSnG=tB  
     Y+il>.Z  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ><<(6  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ,;3#}OGg  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) y|r+<  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 4n55{?Z  
    sum = aob + boc + cod + doa i?+ZrAx>  
    If 360.01 > sum And sum > 359.99 Then ZL!,s#  
       point_in = True Z) nB  
    Else pq8XCOllXx  
       point_in = False 5u/dr9n  
    End If 5%H(AaG*q  
End Function

'得到点半径,得到交点坐标函数 GnAG'.t-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() N.\?"n   
    '求得中心点坐标 E}^np[u7  
Dim tt As String >"LHr&;m&h  
Dim rt(3) As Single *\#/4_yB}  
    '判断是否平行 TcW-pY<N  
   acx = p3x - p1x 0L->e(Vf7u  
   acy = p3y - p1y d|I_SI1  
   bdx = p4x - p2x YUGE>"{  
   bdy = p4y - p2y i}&&rr  
   If acx * bdy = acy * bdx Then ibzcO,c  
      rt(0) = 0 %"<|u)E  
      Exit Function ]~a;tF>Fw  
   Else z@bq*':~J  
      '判断斜率存在否 qq Vjx?bKe  
      If p1x = p3x And p2x <> p4x Then TJYup%q  
         tt = "ac_n_bd_y" )FLDCer  
      ElseIf p1x <> p3x And p2x = p4x Then MP/@Mf\<E  
         tt = "ac_y_bd_n" 3
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      ElseIf p1x <> p3x And p2x <> p4x Then ^)J2tpr;]=  
         tt = "ac_y_bd_y" RIC\f_Dv  
      End If 'SW%EVB  
    Select Case tt `efC4#*!!  
         Case "ac_n_bd_y" 9Wu c1#  
            'bd线段方程 vR"?XqgZ  
            k_bd = bdy / bdx m!22t
pb  
            b_bd = p2y - k_bd * p2x Cs:?9G  
            p_x = p1x ppm=o4`s[  
            p_y = k_bd * p_x + b_bd b]0]*<~y  
         Case "ac_y_bd_n" ]et ]Vkg  
            'ac线段方程 IOfxx>=3  
            k_ac = acy / acx .j et0w  
            b_ac = p1y - k_ac * p1x !+UU[uM  
            p_x = p2x ^`~s#L7  
            p_y = k_ac * p_x + b_ac /gX=79  
        Case "ac_y_bd_y" h+gaKh=k+  
           'ac，bd线段都要求 y ;/T.W9!  
           k_ac = acy / acx ]QU 9|1  
           b_ac = p1y - k_ac * p1x J#>)+  
           k_bd = bdy / bdx O'Mo/ u1-  
           b_bd = p2y - k_bd * p2x %fT%,( w}t  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) jo-2D[Q{  
           p_y = k_ac * p_x + b_ac !Y8+Z&^2  
        End Select T}}T`Ce  
      rt(1) = p_x Vjdu9Ez  
      rt(2) = p_y ._E 6?  
     |2Vhj<6  
'计算最大半径 c>|1%}"?  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) qix$ }(P  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) VGYx(  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ndmsXls  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 8t;vZ&  
Dim bb(5) As Single XnwVK  
  bb(1) = rr1 7"_m?c8  
  bb(2) = rr2 A`B>fI  
  bb(3) = rr3 Af"p:;^z  
  bb(4) = rr4 +P &S0/  
  nb = rr1 exZgk2[0  
For i = 1 To 4 H|Y*TI2vf8  
    If nb <= bb(i) Then `<3%`4z/  
       nb = bb(i) /Hs\`Kg"!  
    End If Iq0[Kd0.
j  
Next i ptc.JB6  
    rt(0) = Sqr(nb) _4f=\  
    rr = rt() e**<et.  
  End If dO1h1yJJ  
         {X\%7Zef+  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  wg4Ol*y'  

oL7F^34;  
有热压工艺方面的人才或者资料分享下； *mz-g7  
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 AHU=`z  

高手真多！

楼主威武霸气.