[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： p&>*bF,  
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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： GbFLu`Iu  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） *p`0dvXG2  
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 AjKP -[  
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 X/gIH/  

以下是几个重要的函数： K{.s{;#  
1.判断点在区域中函数 }S<2({GI  
2.计算夹角函数 ,d(F|5M:  
3.转置函数 rlT[tOVAY  
4.得到区域中心点，及区域半径函数 vA2@Db}  
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==O4  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 gP"p7\ (  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single kq6S`~J^R  
   cax = x2 - x1 ; Xrx>( n  
   cay = y2 - y1 3G9"La,b  
   cbx = x2 - x3 <h^'x7PkW5  
   cby = y2 - y3 -}`ES]  
   mo_jj = cax * cbx + cay * cby ^"7tfo8  
   mo_ca = Sqr(cax * cax + cay * cay) j}uFp|df<  
   mo_cb = Sqr(cbx * cbx + cby * cby) -CfGWO#Gbx  
   cos_acb = mo_jj / (mo_ca * mo_cb) ["- pylhK  
   'ff_cos = cos_acb aehGT|  
   If cos_acb >= 1 Then A"x1MjuqLM  
   nn = 0 Vo}3E]  
   ElseIf cos_acb <= -1 Then lE:X~RO"~  
   nn = 3.14159265258979 nv1'iSEeOl  
   Else 'bGL@H  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) =]&?(Gq  
   End If  Q];gC{I  
   'ff_angle = nn !-b4@=f:  
   ff_angle = nn * 180 / 3.14159265258979 _+g5;S5  
End Function

'判断点在区域内函数 O&l
(`*P  
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 ((^jyQ  
Dim aob, boc, cod, doa, sum As Single vzJ69%E_  
  If ppx = p1x And ppy = p1y Then e`k6YO  
     point_in = True tt%Zwf  
     Exit Function TU$PAwn=  
  End If c[E{9wp v  
  If ppx = p2x And ppy = p2y Then RR!(,j^M  
     point_in = True tW53&q\=  
     Exit Function ,Q4U<`ds!  
  End If 1MHP#X;|  
   If ppx = p3x And ppy = p3y Then \}xK$$f2,  
     point_in = True fiz2544  
     Exit Function ;8/w'oe*j  
  End If #P*%FgROl  
     *@o@>  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 26JP<&%L  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) '#$Y:/  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 'Wjuv9)/  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) Jfa=#`    
    sum = aob + boc + cod + doa Af1izS3  
    If 360.01 > sum And sum > 359.99 Then W)JUMW2|  
       point_in = True pw{3I 2Ix  
    Else eO;i1>  
       point_in = False BM=`zGh"  
    End If ,\!4A  
End Function

'得到点半径,得到交点坐标函数 / U1VE|T  
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() FP<RoA?W  
    '求得中心点坐标 3l
H#+@  
Dim tt As String Je_Hj9#M\d  
Dim rt(3) As Single uXq?Z@af|f  
    '判断是否平行 fl _k5Q'&p  
   acx = p3x - p1x J0zudbP  
   acy = p3y - p1y yveyAsN`B  
   bdx = p4x - p2x hPr*<2mp  
   bdy = p4y - p2y N[X%tf\L]F  
   If acx * bdy = acy * bdx Then 9qD/q?Hh$  
      rt(0) = 0 hj64E
S#x  
      Exit Function aGVzg$  
   Else >"?HbR9  
      '判断斜率存在否 8+Al+6d|!  
      If p1x = p3x And p2x <> p4x Then oc'#sE  
         tt = "ac_n_bd_y" x&sT )=#  
      ElseIf p1x <> p3x And p2x = p4x Then z"o;|T:  
         tt = "ac_y_bd_n" `%AFKmc^;  
      ElseIf p1x <> p3x And p2x <> p4x Then  84L!r  
         tt = "ac_y_bd_y" f^](D'L?D  
      End If ^y'xcq  
    Select Case tt g!~&PT)*  
         Case "ac_n_bd_y" ;OQ-T+(T  
            'bd线段方程 )|,-l^lC  
            k_bd = bdy / bdx Ht? u{\p@  
            b_bd = p2y - k_bd * p2x +4\JY"oi  
            p_x = p1x 3~6F`G  
            p_y = k_bd * p_x + b_bd ac>}$Uw)  
         Case "ac_y_bd_n" 8=gr F  
            'ac线段方程 r4t|T^{sl  
            k_ac = acy / acx P]!$MOt  
            b_ac = p1y - k_ac * p1x $D5[12X
 
            p_x = p2x qyl~*r*  
            p_y = k_ac * p_x + b_ac ?15k~1nA  
        Case "ac_y_bd_y" y$s}-O]/-  
           'ac，bd线段都要求 n>>hfxv(O!  
           k_ac = acy / acx $t.N|b`'  
           b_ac = p1y - k_ac * p1x d|TRP,y  
           k_bd = bdy / bdx Ek_k_!  
           b_bd = p2y - k_bd * p2x WIOV  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) +P|
$T:b  
           p_y = k_ac * p_x + b_ac $m:}{:LDCf  
        End Select =sRd5aMs  
      rt(1) = p_x a8M.EFa:  
      rt(2) = p_y *{W5QEa  
     S$W *i@x?  
'计算最大半径 7}Z.g9<  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) LW_Y  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ( f8g}2  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) .Y'kDuUu  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ;nLQ?eS\  
Dim bb(5) As Single o;FjpZ  
  bb(1) = rr1 Oz^+;P1  
  bb(2) = rr2 
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  bb(3) = rr3 G,{L=xOh  
  bb(4) = rr4 3Zsqx=w  
  nb = rr1 +;#hED;8  
For i = 1 To 4 o]n5pZ\\W<  
    If nb <= bb(i) Then }^G'oR1LF  
       nb = bb(i) t(lTXG  
    End If Bx E1Ky8@A  
Next i lO%Z4V_Mj  
    rt(0) = Sqr(nb) [=e61Z  
    rr = rt() uI%h$  
  End If <| |Lj  
         [rTV)JsTb  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ~Dy0HVE   

;quGy3  
有热压工艺方面的人才或者资料分享下； 'Y vW|Iq  
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 i"e)LJz  

高手真多！

楼主威武霸气.