[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： -o.:P>/  
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关键点说几个： m<g~H4  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 5
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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 @{pLk4E  
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 bD8Gwi=iiu  

以下是几个重要的函数： yqiq,=OvP  
1.判断点在区域中函数 4vV:EF-  
2.计算夹角函数 om-omo&,X=  
3.转置函数 Oh\<VvZuN  
4.得到区域中心点，及区域半径函数 VgC2+APg  
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） ,$+V  
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:SN~P66+  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 8d-t|HkN  
   cax = x2 - x1 bl(RyAgA  
   cay = y2 - y1 U\<?z Dw  
   cbx = x2 - x3 =-lb)Z"d  
   cby = y2 - y3 }HePZ{PLM  
   mo_jj = cax * cbx + cay * cby Hi`//y*92H  
   mo_ca = Sqr(cax * cax + cay * cay) #7YY<) xt}  
   mo_cb = Sqr(cbx * cbx + cby * cby) tWa)_y  
   cos_acb = mo_jj / (mo_ca * mo_cb) 4G>H  
   'ff_cos = cos_acb 5K?IDt7A]  
   If cos_acb >= 1 Then =j*$ |X3W  
   nn = 0 Gvqxi|  
   ElseIf cos_acb <= -1 Then -FQ 'agf@&  
   nn = 3.14159265258979 V0XvJ  
   Else )fSOi||C  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) _ T):G6C8  
   End If ?+a,m# Yx  
   'ff_angle = nn W=qVc  
   ff_angle = nn * 180 / 3.14159265258979 I\JGs@I   
End Function

'判断点在区域内函数 364`IC( a  
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 o-OHjFfB  
Dim aob, boc, cod, doa, sum As Single )MchsuF<  
  If ppx = p1x And ppy = p1y Then |NC*7/}  
     point_in = True \EtQ5T*u  
     Exit Function Yqi4&~?db  
  End If ]4]6Qki  
  If ppx = p2x And ppy = p2y Then @A89eZbW  
     point_in = True 1\>^m  
     Exit Function g^{@'}$  
  End If YccH+[X;
 
   If ppx = p3x And ppy = p3y Then _JE"{ ;  
     point_in = True f;gw"onx8F  
     Exit Function )PuFuf(wz  
  End If nV:LqF=  
     dCk3;XU  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) j4`0hnqI  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) =U|.^5sa#  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) X_|J@5b7  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) hB>oJC  
    sum = aob + boc + cod + doa C3],n  
    If 360.01 > sum And sum > 359.99 Then %<*g!y `  
       point_in = True `_RTw5{  
    Else sVv xHkt@  
       point_in = False N@1+O,o  
    End If _FVcx7l!
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End Function

'得到点半径,得到交点坐标函数 ,Pjew%  
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() L=8<B=QT$  
    '求得中心点坐标 $yYO_ZBiy  
Dim tt As String >>o
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Dim rt(3) As Single 5b[jRj6  
    '判断是否平行 An"</;HU  
   acx = p3x - p1x 9qz6]-K  
   acy = p3y - p1y 4K\(xd&Q  
   bdx = p4x - p2x %i-c0|,T4  
   bdy = p4y - p2y &<J[Q%2  
   If acx * bdy = acy * bdx Then m{uxIza  
      rt(0) = 0 @zz1hU  
      Exit Function [[F
x[  
   Else muZ~*kMc  
      '判断斜率存在否 H{k
^S\K  
      If p1x = p3x And p2x <> p4x Then rIhl.5Y  
         tt = "ac_n_bd_y" ayD}r#7  
      ElseIf p1x <> p3x And p2x = p4x Then kg3EY<4i  
         tt = "ac_y_bd_n" ez^@NK
 
      ElseIf p1x <> p3x And p2x <> p4x Then .CU5}Tv-  
         tt = "ac_y_bd_y" ;z:UN}  
      End If ?zVL;gVWA  
    Select Case tt mvZw  
         Case "ac_n_bd_y" SNE#0L'}  
            'bd线段方程 : b~6i%b  
            k_bd = bdy / bdx D'A/wG  
            b_bd = p2y - k_bd * p2x TGe;HZ  
            p_x = p1x ,%Up0Rr,  
            p_y = k_bd * p_x + b_bd `~;rblo;  
         Case "ac_y_bd_n" C{DvD'^  
            'ac线段方程 1/-43B  
            k_ac = acy / acx
<**y !2  
            b_ac = p1y - k_ac * p1x +0q>fp_K(+  
            p_x = p2x 4^Q:  
            p_y = k_ac * p_x + b_ac fKeT~z{~  
        Case "ac_y_bd_y" pg%aI,  
           'ac，bd线段都要求 +H#U~p$  
           k_ac = acy / acx i35=Y~P-  
           b_ac = p1y - k_ac * p1x wG<(F}VX  
           k_bd = bdy / bdx nMvKTH  
           b_bd = p2y - k_bd * p2x 69NQ]{1  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) P2'DD 3   
           p_y = k_ac * p_x + b_ac Ve
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        End Select ixQJ[fH10  
      rt(1) = p_x eI:C{0p=  
      rt(2) = p_y i?e`:}T  
     qfz8jY]  
'计算最大半径 .h5[Q/*h  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 5 Ho
^N1q  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) A\#P*+k0  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ]U7KLUY>:  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) /3:q#2'v  
Dim bb(5) As Single wqW0v\  
  bb(1) = rr1 >Ll$p0W  
  bb(2) = rr2 ZMLg;-T.&4  
  bb(3) = rr3 ;cz|ss=
  
  bb(4) = rr4 YH
_7=0EJ  
  nb = rr1 9n5<]Q(  
For i = 1 To 4 ' dx1x6  
    If nb <= bb(i) Then z,:a8LB#[  
       nb = bb(i) `o?Ph&p}  
    End If f'{]"^e=  
Next i DHT&,=  
    rt(0) = Sqr(nb) @%
lBrM  
    rr = rt() L%c0Z@[~  
  End If (N=5.7"T  
         &o97u4xi  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  <p?&udqD  

8g>b  
有热压工艺方面的人才或者资料分享下；
0J8K9rP;z  
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 nB ".'=  

高手真多！

楼主威武霸气.