[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： h\
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%g}ri8  
o7E?A  

关键点说几个： _oxhS!.*  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ntE;*FyH  
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 6VpT*,2d~  
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 [f,; +Ze  

以下是几个重要的函数： ],9%QE  
1.判断点在区域中函数 Q[J%  
2.计算夹角函数 oHH-joYnn  
3.转置函数 ;:NW  
4.得到区域中心点，及区域半径函数 0w}OE8uq  
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） +x$GwX  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ?v?b%hK!;  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single <]#'6'  
   cax = x2 - x1 G\4h4
% a  
   cay = y2 - y1 >DqV^%2l  
   cbx = x2 - x3 uaN0X"  
   cby = y2 - y3 Q^=drNV  
   mo_jj = cax * cbx + cay * cby CqGi 2<2  
   mo_ca = Sqr(cax * cax + cay * cay) ,x#5.Koz  
   mo_cb = Sqr(cbx * cbx + cby * cby) D
/wX  
   cos_acb = mo_jj / (mo_ca * mo_cb) R]hilb'a  
   'ff_cos = cos_acb #5*|/LD  
   If cos_acb >= 1 Then !0Hx1I<*x  
   nn = 0 $A"C1)d;  
   ElseIf cos_acb <= -1 Then a(- ^ .w  
   nn = 3.14159265258979 J eCKnt=  
   Else <pzCpF<  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) /, T@/  
   End If `rEu8u  
   'ff_angle = nn xfYDjf :<  
   ff_angle = nn * 180 / 3.14159265258979 z&x ^Dl  
End Function

'判断点在区域内函数 "_!D b&AH  
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 )nncCUW  
Dim aob, boc, cod, doa, sum As Single BC|=-^(  
  If ppx = p1x And ppy = p1y Then tS|gQUF17  
     point_in = True O2z{>\  
     Exit Function 1
nHQ)od  
  End If EC
q(i(  
  If ppx = p2x And ppy = p2y Then S3Q^K.e?  
     point_in = True z u53mZ  
     Exit Function -2Bkun4Pt  
  End If $H}G'LqiG  
   If ppx = p3x And ppy = p3y Then 3-^z<*  
     point_in = True pGS!Nn;K2  
     Exit Function `x
b\)  
  End If ]Dj,8tf`H  
     {,V.IDs8[  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) C%#%_
"N  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 8n_!WDD  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) `cu W^/c  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ddR*&.Y!a  
    sum = aob + boc + cod + doa LBO3){=J  
    If 360.01 > sum And sum > 359.99 Then ~< ~PaP$=\  
       point_in = True (6b*
JQ^^  
    Else ^g^R[8  
       point_in = False $hND!T+;  
    End If T'W)RYnwl  
End Function

'得到点半径,得到交点坐标函数 QkY]z~P4  
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() h`{agWB  
    '求得中心点坐标 ^a,Oi%  
Dim tt As String 0O@UT1M;v  
Dim rt(3) As Single '+%<\.$  
    '判断是否平行 i
!AFXVX  
   acx = p3x - p1x B4uJT~,7>  
   acy = p3y - p1y jFE1k(2e  
   bdx = p4x - p2x $_ &Lp\  
   bdy = p4y - p2y H YA<  
   If acx * bdy = acy * bdx Then O{P@fv%~(o  
      rt(0) = 0 6R`q{}.  
      Exit Function >0^oC[ B  
   Else )R~l@QBN  
      '判断斜率存在否 |IN{8  
      If p1x = p3x And p2x <> p4x Then nu=yE$BN{  
         tt = "ac_n_bd_y" /y2)<{{I  
      ElseIf p1x <> p3x And p2x = p4x Then H{tG:KH  
         tt = "ac_y_bd_n" wWh)yfPh8H  
      ElseIf p1x <> p3x And p2x <> p4x Then 6!QY)H^j9,  
         tt = "ac_y_bd_y" uD'GI  
      End If AbqeZn  
    Select Case tt 7,^.h<@K  
         Case "ac_n_bd_y" }3%L3v&  
            'bd线段方程 ftaGu-d%  
            k_bd = bdy / bdx vOF"p4 ^3  
            b_bd = p2y - k_bd * p2x 0`=>/Wr39  
            p_x = p1x 'MWu2L!F  
            p_y = k_bd * p_x + b_bd ff{L=uj  
         Case "ac_y_bd_n" uT\|jv,  
            'ac线段方程 \vKKq/f  
            k_ac = acy / acx ~4T:v_Q7g  
            b_ac = p1y - k_ac * p1x CC,f*I  
            p_x = p2x f+WN=-F\  
            p_y = k_ac * p_x + b_ac r2h{#2  
        Case "ac_y_bd_y" vV
(?A  
           'ac，bd线段都要求 2oO&8:`tv  
           k_ac = acy / acx VKZZTFmV2)  
           b_ac = p1y - k_ac * p1x <SPT2NyX  
           k_bd = bdy / bdx mFGiysM  
           b_bd = p2y - k_bd * p2x KscugX*x  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) J*%XtRio  
           p_y = k_ac * p_x + b_ac N(7UlS,u'  
        End Select {S$]I)tV  
      rt(1) = p_x j0X Jf<  
      rt(2) = p_y 6Fe$'TP  
     Dr_ (u<[  
'计算最大半径 3D2\#6yo  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Y8s.Q  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) A.8[FkiNmD  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) #a$k3C  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 3hD
\6,@  
Dim bb(5) As Single w>TlM*3D/  
  bb(1) = rr1 (X{o =co,  
  bb(2) = rr2 9f|+LN##  
  bb(3) = rr3 ?as1^~  
  bb(4) = rr4 CGp7 Tx#  
  nb = rr1 I@M3u/7  
For i = 1 To 4 S.! n35  
    If nb <= bb(i) Then mne?r3d  
       nb = bb(i) kGkfLY6B  
    End If z,f  
Next i 1SwKd*aRR?  
    rt(0) = Sqr(nb) a3wk#mH  
    rr = rt() JtbwY@R  
  End If \@eaSa  
         v>!tws5e  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Bf+7;4-  

Ns#R`WG)  
有热压工艺方面的人才或者资料分享下； _gn`Y(c$%  
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 N^@aO&+A  

高手真多！

楼主威武霸气.