[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： sbhzER  
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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： UFu0{rY_  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） [h !
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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 g'{?j~g  
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 (y~%6o6  

以下是几个重要的函数： wa{!%qu5.R  
1.判断点在区域中函数 VH<d[Mj  
2.计算夹角函数
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3.转置函数 "A&A?%  
4.得到区域中心点，及区域半径函数 f F)M'C
  
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） >;R`Q9s7  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ao=e{R)  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single D&I/Tbc  
   cax = x2 - x1 U<Qi`uoj!  
   cay = y2 - y1 {d
h,sbl  
   cbx = x2 - x3 jkta]#O  
   cby = y2 - y3 54JZOtC3~  
   mo_jj = cax * cbx + cay * cby 'q_Z dw%  
   mo_ca = Sqr(cax * cax + cay * cay) &-p~UZy  
   mo_cb = Sqr(cbx * cbx + cby * cby) /;/:>c  
   cos_acb = mo_jj / (mo_ca * mo_cb) 5Phsh  
   'ff_cos = cos_acb l4.ql1BX@y  
   If cos_acb >= 1 Then JZ![:$:  
   nn = 0 !g6=/9  
   ElseIf cos_acb <= -1 Then &JKQH  
   nn = 3.14159265258979 j~V$q/7S  
   Else n7G`b'  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) T3<1{"&  
   End If Ejr'Yzl3_  
   'ff_angle = nn Lu:*nJ%1[  
   ff_angle = nn * 180 / 3.14159265258979 o<txm?+N  
End Function

'判断点在区域内函数 >B~? }@^Gk  
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 ,Eh]Zv1AE  
Dim aob, boc, cod, doa, sum As Single e1E_$oJP  
  If ppx = p1x And ppy = p1y Then qm_m8  
     point_in = True @mxaZ5Vv}  
     Exit Function Vp~ cN  
  End If O CIoY?a  
  If ppx = p2x And ppy = p2y Then \}W3\To_  
     point_in = True pjTJZhT2I  
     Exit Function (3D&GY!/  
  End If ^2 H-_  
   If ppx = p3x And ppy = p3y Then xyM|q9Gf@  
     point_in = True (`E`xb@E,=  
     Exit Function /3^XJb$Sa  
  End If DCZG'eb  
     f(blqO.@l  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 1 hFh F^  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) x3`JC&hF,q  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) <fDT/  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) IQtQf_"e1  
    sum = aob + boc + cod + doa 3)#Nc|  
    If 360.01 > sum And sum > 359.99 Then l4U*Lv>   
       point_in = True f~Pce||e  
    Else 0L8fpGJ  
       point_in = False ! }e75=x  
    End If U*\K<fw   
End Function

'得到点半径,得到交点坐标函数 KN657 |f  
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() cUG^^3!  
    '求得中心点坐标 & C)
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Dim tt As String G,$nq4  
Dim rt(3) As Single ercXw7{  
    '判断是否平行 B|"i`{>  
   acx = p3x - p1x ! M CV@5$  
   acy = p3y - p1y iEr?s-or  
   bdx = p4x - p2x =fnBE`Uc  
   bdy = p4y - p2y <dD!_S6@,  
   If acx * bdy = acy * bdx Then <&) hg:  
      rt(0) = 0 -2[4 @  
      Exit Function 9@ fSO<  
   Else =$gBWS  
      '判断斜率存在否 *'A*!=5(  
      If p1x = p3x And p2x <> p4x Then %!nN<%  
         tt = "ac_n_bd_y" e/:?9  
      ElseIf p1x <> p3x And p2x = p4x Then !a:e=b7g  
         tt = "ac_y_bd_n" EKF4]  
      ElseIf p1x <> p3x And p2x <> p4x Then FI?J8a  
         tt = "ac_y_bd_y" d^6-P R_  
      End If V-go?b`  
    Select Case tt ,'`yh|}G\  
         Case "ac_n_bd_y" oNPvksdC;  
            'bd线段方程 5m0lk|`  
            k_bd = bdy / bdx '5$@I{z  
            b_bd = p2y - k_bd * p2x Q"{Dijc%  
            p_x = p1x pQ0*)}l,  
            p_y = k_bd * p_x + b_bd `4xQ#K.-  
         Case "ac_y_bd_n" PpG;5  
            'ac线段方程 Zv9JkY=+@  
            k_ac = acy / acx AQQa6Ce*  
            b_ac = p1y - k_ac * p1x xcmg3:s  
            p_x = p2x Ym\<@[3+!  
            p_y = k_ac * p_x + b_ac g3[-[G
^5  
        Case "ac_y_bd_y" [[<TW}  
           'ac，bd线段都要求 25vjn 1$sW  
           k_ac = acy / acx rYdNn0mhk  
           b_ac = p1y - k_ac * p1x fUWrR1  
           k_bd = bdy / bdx H{5,  -x  
           b_bd = p2y - k_bd * p2x WLj]EsA.  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) X=m^+%iD  
           p_y = k_ac * p_x + b_ac sPW:[  
        End Select :P2!& W  
      rt(1) = p_x KyVzf(^  
      rt(2) = p_y `|AH3v1  
     N]/cBGy  
'计算最大半径 rL"]m_FK  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ^ /G ;  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) g.`Ntsi$wI  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) DDGDj)=`  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 08^f|K  
Dim bb(5) As Single svEe@Kt`  
  bb(1) = rr1 *@#Gc%mGu  
  bb(2) = rr2 ~%h )G#N  
  bb(3) = rr3 K O\HH  
  bb(4) = rr4 !=,zy  
  nb = rr1 q#c+%,Z=C  
For i = 1 To 4 4<UAT|L^`  
    If nb <= bb(i) Then GEVDXx>@  
       nb = bb(i) ai?J
  
    End If v8 =#1YB;  
Next i 3zKeN:w  
    rt(0) = Sqr(nb) ~:Z|\a58j  
    rr = rt() #Ox@[Z1I  
  End If  C&qo$C  
         W>+`e]z  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  oVp/EQ  

g
#6R(  
有热压工艺方面的人才或者资料分享下； UB>BVBCt  
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 9o?\*{'KT  

高手真多！

楼主威武霸气.