[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： ^W5>i[  

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描述:请输入描述

图片:2.jpg

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关键点说几个： ]c5DOv&  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） V;H d)v(j  
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 *&(2`#C;  
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 Q^[e/U,  

以下是几个重要的函数： -l\~p4U  
1.判断点在区域中函数 &t~zD4u B  
2.计算夹角函数 6#-6Bh)>4  
3.转置函数 +.S#=  
4.得到区域中心点，及区域半径函数 Q^*G`&w,  
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） )Y=w40Yzd  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 $?[1#%  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single yB0jL:|a  
   cax = x2 - x1 N|UBaPS|
o  
   cay = y2 - y1 fndK/~?]H
 
   cbx = x2 - x3 '9IP;  
   cby = y2 - y3 bc `UA  
   mo_jj = cax * cbx + cay * cby hZp=BM"bJ  
   mo_ca = Sqr(cax * cax + cay * cay) <^CYxy  
   mo_cb = Sqr(cbx * cbx + cby * cby) mY$nI -P  
   cos_acb = mo_jj / (mo_ca * mo_cb) }%-UL{3%
 
   'ff_cos = cos_acb IUluJ.sXIf  
   If cos_acb >= 1 Then H;b8I  
   nn = 0 ^;0~6uBEJr  
   ElseIf cos_acb <= -1 Then T[i7C3QS  
   nn = 3.14159265258979 ` (7N^@  
   Else rFKo E%  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) [ED!J~lg8  
   End If W2}%zux  
   'ff_angle = nn Xy[4f=X}z  
   ff_angle = nn * 180 / 3.14159265258979 r{pI-$  
End Function

'判断点在区域内函数 03X<x|  
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 LL|_c4$Ky  
Dim aob, boc, cod, doa, sum As Single qWRNHUd  
  If ppx = p1x And ppy = p1y Then K!IF?iell  
     point_in = True >$7wA9YhL  
     Exit Function "wT~$I"  
  End If Ov$N"  
  If ppx = p2x And ppy = p2y Then (t]lP/  
     point_in = True uvu**s  
     Exit Function ](B&l{V  
  End If m&Y;
/kr  
   If ppx = p3x And ppy = p3y Then `A4QU,0 8h  
     point_in = True #JJp:S~`   
     Exit Function "/4s8.dw+u  
  End If !A'
`uf4u  
     F<PWBs%  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) JLy)}8I  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) "C$!mdr7  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 1R5\GKF6o  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) &+E'1h10  
    sum = aob + boc + cod + doa GW>7R6i  
    If 360.01 > sum And sum > 359.99 Then |QAeQWP+1  
       point_in = True 4
 |:Q1  
    Else "!%w9  
       point_in = False veYsctK~  
    End If }@ O|RkY  
End Function

'得到点半径,得到交点坐标函数 :f?,]|]+-  
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() G*vpf~q?  
    '求得中心点坐标 AhbT/  
Dim tt As String *!r\GGb  
Dim rt(3) As Single | Q1ubS  
    '判断是否平行 Wvut)T  
   acx = p3x - p1x "W_jdE6v  
   acy = p3y - p1y .WL\:{G8;  
   bdx = p4x - p2x eB<V%,%N#  
   bdy = p4y - p2y o-Q]Dk1W  
   If acx * bdy = acy * bdx Then \pewbu5^  
      rt(0) = 0 n3l"L|W^(<  
      Exit Function <\}Y@g8  
   Else 0TuOY%+  
      '判断斜率存在否 [5RFQ!  
      If p1x = p3x And p2x <> p4x Then &{%S0\K Y  
         tt = "ac_n_bd_y" u'$yYzBE  
      ElseIf p1x <> p3x And p2x = p4x Then %|D\j-~  
         tt = "ac_y_bd_n" c5B_WqjJ  
      ElseIf p1x <> p3x And p2x <> p4x Then T}w*K[z $  
         tt = "ac_y_bd_y" CD8JYiJ  
      End If JL.ydH79  
    Select Case tt r'9=
kx  
         Case "ac_n_bd_y" @R'g@+{I  
            'bd线段方程 9h3~;Q  
            k_bd = bdy / bdx VeN&rjc  
            b_bd = p2y - k_bd * p2x ."!8B9
s  
            p_x = p1x ]df9'\  
            p_y = k_bd * p_x + b_bd p(x1D]#Z[  
         Case "ac_y_bd_n" ^EuyvftZ  
            'ac线段方程 /8$1[[[  
            k_ac = acy / acx r_g\_y7ua  
            b_ac = p1y - k_ac * p1x JR a*;_  
            p_x = p2x <D;H}ef  
            p_y = k_ac * p_x + b_ac CYFas:rPLT  
        Case "ac_y_bd_y" Kc9mI>uH  
           'ac，bd线段都要求 NqQ(X'W7
 
           k_ac = acy / acx CQ8o9A/  
           b_ac = p1y - k_ac * p1x vYMbs
on}  
           k_bd = bdy / bdx qh)!|
B  
           b_bd = p2y - k_bd * p2x A=qW]Im  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) _~wV{ yp  
           p_y = k_ac * p_x + b_ac OO !S w  
        End Select d,oOn.n&  
      rt(1) = p_x :d% -,v  
      rt(2) = p_y LKqog%,c  
     pZ_FVID  
'计算最大半径 G7_"^r%c9;  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 2,XqslB)  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 7u`}t83a  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) '#4mDz~  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ,a]~hNR*X  
Dim bb(5) As Single zFdz]z3  
  bb(1) = rr1 od5w9E.  
  bb(2) = rr2 LHHDt<+B  
  bb(3) = rr3 -4^@)~Y  
  bb(4) = rr4 #o"HD6e  
  nb = rr1 B'gk/^6$eg  
For i = 1 To 4 w
h7a|  
    If nb <= bb(i) Then tls6rto  
       nb = bb(i) ,5<`+w#a  
    End If C(t6;&H  
Next i }_kI>  
    rt(0) = Sqr(nb) 6
02eLV)  
    rr = rt() {ZsWZJ!  
  End If $jeDVH  
         Zs$RKJ7  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  q
jEWk."  

2#A9D.- h  
有热压工艺方面的人才或者资料分享下； *9{Wn7pck/  
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 VJtTbt;>  

高手真多！

楼主威武霸气.