[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： F^
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关键点说几个： ^bL.|vB  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） wxo(  
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 3'u%[bx E  
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 *qY`MW
  

以下是几个重要的函数： xE;fM\7pu  
1.判断点在区域中函数 wzo-V^+q  
2.计算夹角函数 ]wa?~;1^&  
3.转置函数 09|d<  
4.得到区域中心点，及区域半径函数 |%&WYm6&#  
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） 0 "pm7  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 GE~mu76%  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single _Mq@58q'  
   cax = x2 - x1 K.l?R#G`,F  
   cay = y2 - y1 e *;"$7o9  
   cbx = x2 - x3 ^x4,}'(  
   cby = y2 - y3 m'aw`?  
   mo_jj = cax * cbx + cay * cby m>zUwGYEu  
   mo_ca = Sqr(cax * cax + cay * cay) /,E%)K;  
   mo_cb = Sqr(cbx * cbx + cby * cby) (X>r_4W$  
   cos_acb = mo_jj / (mo_ca * mo_cb) oPzt1Y  
   'ff_cos = cos_acb ]#S1AvT  
   If cos_acb >= 1 Then @f*/V e0.  
   nn = 0 kz,Nz09}W  
   ElseIf cos_acb <= -1 Then [u)^QgP  
   nn = 3.14159265258979 3gv>AgG  
   Else |P5?0{  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 68 -I2@&  
   End If ;EFs2-{K  
   'ff_angle = nn n2(~r 'r)  
   ff_angle = nn * 180 / 3.14159265258979 wF@qBDxg  
End Function

'判断点在区域内函数 IWm|6@y  
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 |!57Z4X  
Dim aob, boc, cod, doa, sum As Single !R)v2Mk|  
  If ppx = p1x And ppy = p1y Then )JuD !  
     point_in = True 4!/{CGP  
     Exit Function V\ARe=IWM  
  End If T!v%NZj3  
  If ppx = p2x And ppy = p2y Then 8uT@$./  
     point_in = True Vs{|:L+  
     Exit Function *]x]U >EF  
  End If *(o~pxFTR  
   If ppx = p3x And ppy = p3y Then !u\X,.h  
     point_in = True `n5)oU2q  
     Exit Function #[I`VA\x  
  End If J tYnBg?[E  
     \i`/k(  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y)
@xO<~  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) HK:?Y[ebs  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) AO8`ItNZdT  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) \n:'>:0X!  
    sum = aob + boc + cod + doa q ,}W.
 
    If 360.01 > sum And sum > 359.99 Then 4\Q ?4ZX  
       point_in = True O]^E%;(]}i  
    Else c(YNv4*X  
       point_in = False 'H*S-d6V  
    End If q1NAKcA<U  
End Function

'得到点半径,得到交点坐标函数 Q> @0'y=s  
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() aSKI%<?xN  
    '求得中心点坐标 `sJkOEc`  
Dim tt As String ;'R{b$B;|  
Dim rt(3) As Single $]xe,}*Af  
    '判断是否平行 '>2xP<ct!&  
   acx = p3x - p1x A9$q;8= <  
   acy = p3y - p1y =$Xdn'  
   bdx = p4x - p2x `4w0*;k;  
   bdy = p4y - p2y gt'0
B-;W  
   If acx * bdy = acy * bdx Then x*bM C&Ea  
      rt(0) = 0 d t0?4 d  
      Exit Function yWt87+%T  
   Else Q@/wn  
      '判断斜率存在否 >RF[0s'-  
      If p1x = p3x And p2x <> p4x Then JBi<TDm/  
         tt = "ac_n_bd_y" ddlLS  
      ElseIf p1x <> p3x And p2x = p4x Then <\2,7K{{+;  
         tt = "ac_y_bd_n" K~v"%sG{`  
      ElseIf p1x <> p3x And p2x <> p4x Then  3xV  
         tt = "ac_y_bd_y" +a"Asvw2  
      End If ldi'@
^  
    Select Case tt jIAl7aoY  
         Case "ac_n_bd_y" _YO`x  
            'bd线段方程 X#gZgz ='  
            k_bd = bdy / bdx 8cR4@Hqx  
            b_bd = p2y - k_bd * p2x 6D3fkvcZ  
            p_x = p1x ~A [ Ju%R  
            p_y = k_bd * p_x + b_bd .CrahV1G  
         Case "ac_y_bd_n" Uhb6{'+  
            'ac线段方程 $&k zix  
            k_ac = acy / acx +anNpy  
            b_ac = p1y - k_ac * p1x FeLWQn/aV6  
            p_x = p2x :6N{~[:4  
            p_y = k_ac * p_x + b_ac *sZOws<  
        Case "ac_y_bd_y" Vk@u|6U'  
           'ac，bd线段都要求 QZt/Rm>W0  
           k_ac = acy / acx <iJ->$  
           b_ac = p1y - k_ac * p1x $*L@ym  
           k_bd = bdy / bdx Qighvei  
           b_bd = p2y - k_bd * p2x cz&Qoyh{;  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) r?[PIf  
           p_y = k_ac * p_x + b_ac |giK]Z  
        End Select SDDs}mV  
      rt(1) = p_x {u3^#kF  
      rt(2) = p_y Y -
o*d@  
     Aj SIM.  
'计算最大半径 @&mv4zz&W  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Gvl-q1PVC  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) [1 w  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) r3_@ L
>;  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) }oj$w?Ex  
Dim bb(5) As Single }4 P@`>e/`  
  bb(1) = rr1 tjuW+5O  
  bb(2) = rr2 ^xu`NE8;  
  bb(3) = rr3 }qi6K-,oU  
  bb(4) = rr4 L7%Dc2{^(  
  nb = rr1 qW$IpuK  
For i = 1 To 4 o24`5Jdh  
    If nb <= bb(i) Then  VG q'  
       nb = bb(i) j#3}nJB%#i  
    End If n M,m#"AI  
Next i 2 os&d|  
    rt(0) = Sqr(nb) i1\xZ<|0  
    rr = rt() 6wIv7@Y  
  End If P[% W[E<  
         .e"De-u  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Olj]A]v}  

e\%QHoi>u  
有热压工艺方面的人才或者资料分享下； cx_[Y  
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 rf@/<Wu  

高手真多！

楼主威武霸气.