[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|E{n/g  
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关键点说几个： V}leEf2'  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） (6jr}kP  
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 'f+g`t?  
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 -3YsrcJi  

以下是几个重要的函数： o_2mSD
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1.判断点在区域中函数 oXCZpS  
2.计算夹角函数 =r<0l=  
3.转置函数 'IaI7on  
4.得到区域中心点，及区域半径函数 fO!S^<9,-  
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） oB3,"zY  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 3@k;"pFa<  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single d|,,,+fS  
   cax = x2 - x1 V^qZ~US  
   cay = y2 - y1 YF{KSGq  
   cbx = x2 - x3 mp_
(ke  
   cby = y2 - y3 ~YxLDo'.t  
   mo_jj = cax * cbx + cay * cby _IAvFJI  
   mo_ca = Sqr(cax * cax + cay * cay) yFt'<{z[nL  
   mo_cb = Sqr(cbx * cbx + cby * cby) jni }om  
   cos_acb = mo_jj / (mo_ca * mo_cb) u8Ul +u  
   'ff_cos = cos_acb
dXKv"*7l  
   If cos_acb >= 1 Then a
8?Zb^  
   nn = 0 d2w;d&2S  
   ElseIf cos_acb <= -1 Then 1goK>=-^  
   nn = 3.14159265258979 'ADaz75`*r  
   Else Qp{rAAC:  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) M5C}*c9  
   End If /jI>=:z  
   'ff_angle = nn S.o@95M  
   ff_angle = nn * 180 / 3.14159265258979 xg~ Baun  
End Function

'判断点在区域内函数 ]R^?Pa1Te4  
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 w < p  
Dim aob, boc, cod, doa, sum As Single YQ>M&lnQ<  
  If ppx = p1x And ppy = p1y Then Aa*UV6(v  
     point_in = True mA5xke_)  
     Exit Function qyMR
0ai-  
  End If |H&2[B"
l  
  If ppx = p2x And ppy = p2y Then _20nOg`o  
     point_in = True |F36^  
     Exit Function "Vp+e%cqG  
  End If TY"=8}X1  
   If ppx = p3x And ppy = p3y Then sygAEL;.  
     point_in = True \AOVdnM:  
     Exit Function Qcu1&t\C  
  End If <J=9,tv<  
     <`EZ^S L;  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) }E$^!q{  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) VsOn j~@  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) :)+|q  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) C7&4,],  
    sum = aob + boc + cod + doa sfez0Uqe.~  
    If 360.01 > sum And sum > 359.99 Then *axOen  
       point_in = True MyZ@I7Fb,  
    Else \H+/D &M  
       point_in = False = >)S\Dfi  
    End If U/E M(y  
End Function

'得到点半径,得到交点坐标函数 q#Az\B:  
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() Kx?3]  
    '求得中心点坐标 Oqeoh<y!\  
Dim tt As String |4BS\fx~N  
Dim rt(3) As Single ~a&s5E {  
    '判断是否平行 kpi)uGvGUA  
   acx = p3x - p1x g*Nc+W](P>  
   acy = p3y - p1y tF SO"  
   bdx = p4x - p2x hdtb.u~  
   bdy = p4y - p2y U<
fe 'd  
   If acx * bdy = acy * bdx Then A:F*Y%ZW  
      rt(0) = 0 jdV E/5  
      Exit Function ^2OBc  
   Else m\|I.BUG  
      '判断斜率存在否 vMK
mHq  
      If p1x = p3x And p2x <> p4x Then ]+Yd#<j(u  
         tt = "ac_n_bd_y" PiXegh WH  
      ElseIf p1x <> p3x And p2x = p4x Then #\1;d8h  
         tt = "ac_y_bd_n" Iq.*2aff+  
      ElseIf p1x <> p3x And p2x <> p4x Then W!4(EdT*Cq  
         tt = "ac_y_bd_y" <*0^X%Vf\  
      End If 0 } uEM_a  
    Select Case tt zbZ0BD7e  
         Case "ac_n_bd_y" ac6Lv}w_  
            'bd线段方程 B<(v\=xZ  
            k_bd = bdy / bdx XHcT7}]  
            b_bd = p2y - k_bd * p2x Q+gd|^Vc9  
            p_x = p1x xJrRJwL  
            p_y = k_bd * p_x + b_bd (1gfb*L  
         Case "ac_y_bd_n" .ICGGC`O  
            'ac线段方程 Q~<$'j  
            k_ac = acy / acx ZP5.?A-=C  
            b_ac = p1y - k_ac * p1x +CtsD9PA  
            p_x = p2x "jly[M}C  
            p_y = k_ac * p_x + b_ac ENm\1  
        Case "ac_y_bd_y" B P%>J^  
           'ac，bd线段都要求 vs;T}'O  
           k_ac = acy / acx K?:rrd=7q  
           b_ac = p1y - k_ac * p1x ~|kre:j9  
           k_bd = bdy / bdx !q;EC`i#  
           b_bd = p2y - k_bd * p2x 4Mi~eL%D (  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 2,?4'0Z@R  
           p_y = k_ac * p_x + b_ac v+A$CGH96  
        End Select i]!CH2\  
      rt(1) = p_x 2[: *0 DV#  
      rt(2) = p_y V6Ie\+@.\  
    
IT]D;  
'计算最大半径 )?RR1P-ID  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 1\t}pGSOeh  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 9{\eE]0
  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 2i`N26On  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 4^(u6tX5|+  
Dim bb(5) As Single pJ-/"Q|:i  
  bb(1) = rr1 K*jV=lG  
  bb(2) = rr2 O?|opD  
  bb(3) = rr3 >7. $=y8b  
  bb(4) = rr4 P3C|DO4  
  nb = rr1 Y}%=:Yt  
For i = 1 To 4 cN_e0;*Ua  
    If nb <= bb(i) Then k]W~_  
       nb = bb(i) 91|=D \8aE  
    End If #!0le:_  
Next i 2 >G"A  
    rt(0) = Sqr(nb) |uVhfD=NG  
    rr = rt() n.P$7%G`2  
  End If I_N(e|s\U  
         [4B.;MS(  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  diN5*CF'~  

%9hzz5#  
有热压工艺方面的人才或者资料分享下； lAuI?/E  
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 ) 9h5a+Z  

高手真多！

楼主威武霸气.