[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： ]N}/L lq  
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关键点说几个： YL`MLt4MC  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） aVHID{Gf Z  
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 U}HSL5v  
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 7`~0j6FY  

以下是几个重要的函数： {pi_yr3  
1.判断点在区域中函数 $C=XSuPNK  
2.计算夹角函数 CUdpT$$x3  
3.转置函数 8MW-JZ  
4.得到区域中心点，及区域半径函数 4D5Wse  
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） GYy8kp84  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 F~fN7<9R  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single V@RdvQy  
   cax = x2 - x1 LIJ#nb  
   cay = y2 - y1 e6
J>qwD?  
   cbx = x2 - x3 V*?QZ;hCP  
   cby = y2 - y3 z+M{zr  
   mo_jj = cax * cbx + cay * cby g~|vmVBua  
   mo_ca = Sqr(cax * cax + cay * cay) 2N(Z^  
   mo_cb = Sqr(cbx * cbx + cby * cby) GGLSmfb)  
   cos_acb = mo_jj / (mo_ca * mo_cb) 3y$6}Kp4?  
   'ff_cos = cos_acb -1$z=,q'  
   If cos_acb >= 1 Then Xsn M}  
   nn = 0 (VkO[5j  
   ElseIf cos_acb <= -1 Then g<DXJ7o  
   nn = 3.14159265258979 X%99@qv  
   Else AW_YlS  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 19% "F!^i  
   End If "tOm  
   'ff_angle = nn 9;n*u9<  
   ff_angle = nn * 180 / 3.14159265258979 Uv?^qe0=  
End Function

'判断点在区域内函数 ETH ($$M  
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 7[L%j;)bw  
Dim aob, boc, cod, doa, sum As Single m'G=WO*%  
  If ppx = p1x And ppy = p1y Then f `b6E J  
     point_in = True Bn.R,B0PL  
     Exit Function SMd[*9l [  
  End If n0K+/}m  
  If ppx = p2x And ppy = p2y Then ]m&Ss  
     point_in = True t\2-7Ohj6  
     Exit Function W7.RA>  
  End If dB&<P[$+8  
   If ppx = p3x And ppy = p3y Then TZn5s~t  
     point_in = True Zy)iNNtn  
     Exit Function 3*{l^<`:gA  
  End If I"8Z'<|/\q  
     Uw5&.aqn.b  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ^?q
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    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) iB~dO @  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) fS8Pi,!  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 4v(?]]X  
    sum = aob + boc + cod + doa 1o
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    If 360.01 > sum And sum > 359.99 Then /r&4< @  
       point_in = True X=Y(,ZR(&  
    Else "9~KVILlLu  
       point_in = False -4L27C  
    End If FyXO @yF  
End Function

'得到点半径,得到交点坐标函数 3UQBIrQ  
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() 2]x,joB  
    '求得中心点坐标 xvWP^Qkb  
Dim tt As String .G<Or`K^i  
Dim rt(3) As Single {)kL7>u]^V  
    '判断是否平行 jrm^n_6};  
   acx = p3x - p1x <I?f=[  
   acy = p3y - p1y fkk9&QB%(  
   bdx = p4x - p2x od!s5f!  
   bdy = p4y - p2y )1YGWr;ykS  
   If acx * bdy = acy * bdx Then 8H3O6
ro  
      rt(0) = 0 @P=n{-pIW  
      Exit Function h9nh9a(2  
   Else A~s6~  
      '判断斜率存在否 @t
e}Asv  
      If p1x = p3x And p2x <> p4x Then ,&@FToR  
         tt = "ac_n_bd_y" y#O/Xw  
      ElseIf p1x <> p3x And p2x = p4x Then f?@M"p@T  
         tt = "ac_y_bd_n" -O@/S9]S)  
      ElseIf p1x <> p3x And p2x <> p4x Then '1G0YfG}n  
         tt = "ac_y_bd_y" d%!yFix;<  
      End If f8f|'v|  
    Select Case tt JvJ)}d$,&  
         Case "ac_n_bd_y" Ghe@m6|D  
            'bd线段方程 sI4 FgO  
            k_bd = bdy / bdx ;>]dwsA*P  
            b_bd = p2y - k_bd * p2x [H2su|rBI`  
            p_x = p1x )R@Y$*fm  
            p_y = k_bd * p_x + b_bd "/hLZl  
         Case "ac_y_bd_n" 1bCS4fs^>  
            'ac线段方程 \x_$Pu
 
            k_ac = acy / acx UyMlk  
            b_ac = p1y - k_ac * p1x K$$%j"s
 
            p_x = p2x ]go.IfH  
            p_y = k_ac * p_x + b_ac 'E\qqE[;  
        Case "ac_y_bd_y" tU8aPiUl  
           'ac，bd线段都要求 X(]J
\?n'  
           k_ac = acy / acx B+'w'e$6  
           b_ac = p1y - k_ac * p1x xfqu=z8X  
           k_bd = bdy / bdx s21)*d  
           b_bd = p2y - k_bd * p2x GlT/JZ9  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) /DSy/p0%  
           p_y = k_ac * p_x + b_ac 7l'1  
        End Select kPnuU!  
      rt(1) = p_x Z~"8C Kz  
      rt(2) = p_y oTpoh]|[
 
    
s%N6^}N  
'计算最大半径 pTYV@5|  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ;s-fYS6(>{  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) A&Q!W)=  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) S.owVMQ  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) r+MqjdXG  
Dim bb(5) As Single (j}ed
RUnB  
  bb(1) = rr1 d^|r#"o[  
  bb(2) = rr2 DH4|lb}  
  bb(3) = rr3 m&Y?]nbq  
  bb(4) = rr4 &([Gc+"5E.  
  nb = rr1 !j0iLYo(*  
For i = 1 To 4 ,0n=*o@W  
    If nb <= bb(i) Then x=1Sbs w{  
       nb = bb(i) fydQaxCND  
    End If mZ#IP  
Next i J]&nZud`  
    rt(0) = Sqr(nb) 2\[ Q{T=Qe  
    rr = rt() 5=.mg6:  
  End If M[&p[P@  
         \@j3/!=,n%  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  (`K~p Z  

w'!J  
有热压工艺方面的人才或者资料分享下； BjbpR
Q,  
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 M9sB2Ips<  

高手真多！

楼主威武霸气.