[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： 8BZ&-j{  
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#1*7eANfr  

关键点说几个： v#s*I/kw  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） -nHkO&&R  
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 /uR/,R++  
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 H=~7g3  

以下是几个重要的函数： P?|\Ig1Gk
 
1.判断点在区域中函数 q`L)^In"  
2.计算夹角函数 1(>2tEjYT  
3.转置函数 |=,jom  
4.得到区域中心点，及区域半径函数 kF,ME5%  
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） $- %um  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Ac|dmu  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single #Y   
   cax = x2 - x1 YtWw)IK  
   cay = y2 - y1 QE)zH)(  
   cbx = x2 - x3 , u%V%  
   cby = y2 - y3 OyK#Rm2A=  
   mo_jj = cax * cbx + cay * cby z8{-I@+`  
   mo_ca = Sqr(cax * cax + cay * cay) ZbdGI@  
   mo_cb = Sqr(cbx * cbx + cby * cby) w3>11bE  
   cos_acb = mo_jj / (mo_ca * mo_cb) 4~FRE)8  
   'ff_cos = cos_acb 0
pEM0M  
   If cos_acb >= 1 Then 55$';gh,9  
   nn = 0 d-tg^Ot#  
   ElseIf cos_acb <= -1 Then oCI\yp@a  
   nn = 3.14159265258979 (F.w?f4B3  
   Else Qf~$9?z  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) >s"/uo  
   End If E7@Gpu,o  
   'ff_angle = nn k[a<KbS  
   ff_angle = nn * 180 / 3.14159265258979 );t+~YPS  
End Function

'判断点在区域内函数 X~"p]V_  
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 `W~  
Dim aob, boc, cod, doa, sum As Single $m*Gu:#xm&  
  If ppx = p1x And ppy = p1y Then =QtFJ9\  
     point_in = True #(Gz?kGAH`  
     Exit Function j_<!y(W  
  End If L;j++^p  
  If ppx = p2x And ppy = p2y Then Lkx~>U   
     point_in = True WfG +_iP?  
     Exit Function c$&({Z{1  
  End If  @,k5T51m  
   If ppx = p3x And ppy = p3y Then t? 6 et1~  
     point_in = True /PTRe5-7  
     Exit Function t;h`nH[  
  End If {9V.l.Q  
     a4 N f\7  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) HNBmq>XDc  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) >JS^yVk  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) >|kD(}Axf  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) u|M
x}  
    sum = aob + boc + cod + doa @$%GszyQ'  
    If 360.01 > sum And sum > 359.99 Then g([:"y?  
       point_in = True {b4`\I@<  
    Else bl^Ihza  
       point_in = False ^w~B]*A:"  
    End If [yQ%g;m  
End Function

'得到点半径,得到交点坐标函数 !aF~5P7%  
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() ;]=w6'dP!  
    '求得中心点坐标 T pF[-fO  
Dim tt As String -W('^v_*  
Dim rt(3) As Single F.$z7ee@  
    '判断是否平行 .aY$-Y<  
   acx = p3x - p1x KU` *LB:  
   acy = p3y - p1y ]Rxo}A  
   bdx = p4x - p2x ur'<8pDb$  
   bdy = p4y - p2y {P~rf&Ee  
   If acx * bdy = acy * bdx Then IV. })8
 
      rt(0) = 0 lRg?||1ik  
      Exit Function 9c)#j&2?H  
   Else MukJ^h*V  
      '判断斜率存在否 >iOf3I-ATt  
      If p1x = p3x And p2x <> p4x Then rn*'[i
?  
         tt = "ac_n_bd_y" 4mo/MK&M:  
      ElseIf p1x <> p3x And p2x = p4x Then <F0^+Pf/  
         tt = "ac_y_bd_n" bGeIb-|(  
      ElseIf p1x <> p3x And p2x <> p4x Then %C
iF;wJ  
         tt = "ac_y_bd_y" ?}s;,_GH  
      End If L>sLb(2\i  
    Select Case tt f- 9t  
         Case "ac_n_bd_y" a&b/C*R_  
            'bd线段方程 Pa3-0dUr  
            k_bd = bdy / bdx W$zRUG-  
            b_bd = p2y - k_bd * p2x aH_c84DS  
            p_x = p1x `Fr ,,Q81\  
            p_y = k_bd * p_x + b_bd zG='U  
         Case "ac_y_bd_n" 4DCh+|r  
            'ac线段方程 R~oJ-}iYX  
            k_ac = acy / acx ;(`bP  
            b_ac = p1y - k_ac * p1x d0I s|Gs  
            p_x = p2x tf6m.  
            p_y = k_ac * p_x + b_ac hp'oiR;
~w  
        Case "ac_y_bd_y" '1b 1N5~  
           'ac，bd线段都要求 t(*n[7e  
           k_ac = acy / acx 'D5J5+.z  
           b_ac = p1y - k_ac * p1x $"/l*H\h  
           k_bd = bdy / bdx X|hYZR  
           b_bd = p2y - k_bd * p2x rueaP  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) )Ac,F6w  
           p_y = k_ac * p_x + b_ac x7zc3%T's  
        End Select ;`7~Q  
      rt(1) = p_x Y`ip.Nx  
      rt(2) = p_y %@a;q?/?Nd  
     "t4z)j;  
'计算最大半径 6P _+:Mf  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) X.4WVI  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) .2JZ
7  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) jD S\  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) : Z<\R0  
Dim bb(5) As Single x/<]/D  
  bb(1) = rr1 ]C,j80+pK  
  bb(2) = rr2 9abUh
3  
  bb(3) = rr3 ZSQiQ2\)  
  bb(4) = rr4 yg}O9!MJ  
  nb = rr1 ^;PjO|mD Z  
For i = 1 To 4 " C0dZ  
    If nb <= bb(i) Then fW2NYQP$:  
       nb = bb(i) 7Fo^:"  
    End If #h=V@Dh  
Next i U!|)M  
    rt(0) = Sqr(nb) uZn_*_J!  
    rr = rt() )4uWB2ZRoi  
  End If lF(v<drkB  
         qA7,txQ:  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  U)f('zD  

55s5(]`d  
有热压工艺方面的人才或者资料分享下； &Cb,C+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 ,u>LAo0  

高手真多！

楼主威武霸气.