[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： :M6|V_Yp  
QXI~Toddj  
hLfWDf*T|  

关键点说几个： xb7!!PR  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） g=KK PSK  
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 6rS ? FG=  
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 W}F~vx.  

以下是几个重要的函数： r<]^.]3zj  
1.判断点在区域中函数 x8z
6 <  
2.计算夹角函数 'bv(T2d~~  
3.转置函数 ?n<sN"  
4.得到区域中心点，及区域半径函数 XffHF^l9F  
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） FpttH?^  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 7DW-brd   
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single cB;DB)0P  
   cax = x2 - x1 R^E-9S\@  
   cay = y2 - y1 oW7;t  
   cbx = x2 - x3 Pi&\GMzd  
   cby = y2 - y3 Kd#64NSi$A  
   mo_jj = cax * cbx + cay * cby b9f5  
   mo_ca = Sqr(cax * cax + cay * cay) o
OQan  
   mo_cb = Sqr(cbx * cbx + cby * cby) 8Z@O%\1x6  
   cos_acb = mo_jj / (mo_ca * mo_cb) Rlr[uU_  
   'ff_cos = cos_acb 3,+UsB%  
   If cos_acb >= 1 Then +SRM?av  
   nn = 0 Mi!ak  
   ElseIf cos_acb <= -1 Then sx9[#6~{Y  
   nn = 3.14159265258979 j

{5oXW  
   Else jaTCRn3|<  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) lr,i
5n{6  
   End If u<@ 55k  
   'ff_angle = nn v|kL7t)}  
   ff_angle = nn * 180 / 3.14159265258979 F,5}3$  
End Function

'判断点在区域内函数 6dCqS  
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 0xutG/-&N  
Dim aob, boc, cod, doa, sum As Single 5al44[  
  If ppx = p1x And ppy = p1y Then xeHqC9Ou  
     point_in = True Lop=._W  
     Exit Function h9{'w  
  End If q->46{s|  
  If ppx = p2x And ppy = p2y Then pQxi0/dp  
     point_in = True 7W#9
ki1  
     Exit Function I."4u~[  
  End If jr5x!@rb  
   If ppx = p3x And ppy = p3y Then =HvLuVc  
     point_in = True _bq2h%G=8  
     Exit Function @*LESN>T@t  
  End If xZ"kJ'C4}  
     Q ?W6  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y)
}oTac
 
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) P(r}<SM  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Y-,1&$&
 
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) i`:r2kU:*W  
    sum = aob + boc + cod + doa cE=v566  
    If 360.01 > sum And sum > 359.99 Then K31rt-IIt  
       point_in = True &"svt2  
    Else >&9Iy"  
       point_in = False $}7WJz:  
    End If kR-5RaW  
End Function

'得到点半径,得到交点坐标函数 akQtre`5sd  
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() VL<)d-  
    '求得中心点坐标 ^\\cGJ&8c  
Dim tt As String A|@d4+  
Dim rt(3) As Single FyQ^@@  
    '判断是否平行 .,x08M  
   acx = p3x - p1x nyPA
`)5F0  
   acy = p3y - p1y B: uW(E  
   bdx = p4x - p2x o0Hh&:6!M  
   bdy = p4y - p2y 6i\b&  
   If acx * bdy = acy * bdx Then W"WvkW>-  
      rt(0) = 0 @,sg^KB  
      Exit Function femAVx}go  
   Else g;bkVq  
      '判断斜率存在否 X;p,Wq#D'  
      If p1x = p3x And p2x <> p4x Then =RUKN38  
         tt = "ac_n_bd_y" i@_|18F]`  
      ElseIf p1x <> p3x And p2x = p4x Then g!%csf  
         tt = "ac_y_bd_n" Ph.$]yQCc]  
      ElseIf p1x <> p3x And p2x <> p4x Then  PxK  
         tt = "ac_y_bd_y" 7z6yn=B  
      End If +Mv0X%(N  
    Select Case tt n|L.dBAs]  
         Case "ac_n_bd_y" f.'o4HSj  
            'bd线段方程 2Sb~tTGz79  
            k_bd = bdy / bdx G#CWl),=  
            b_bd = p2y - k_bd * p2x W?/7PVGv5h  
            p_x = p1x ]]%CO$`T[  
            p_y = k_bd * p_x + b_bd |)IN20  
         Case "ac_y_bd_n" )r1Z}X(#d  
            'ac线段方程 ^ tm,gh  
            k_ac = acy / acx 4k$BqM1  
            b_ac = p1y - k_ac * p1x Tj*zlb4  
            p_x = p2x  Jb {m  
            p_y = k_ac * p_x + b_ac "mT~_BsD  
        Case "ac_y_bd_y" y)#Ib*?  
           'ac，bd线段都要求 9^s sT>&/  
           k_ac = acy / acx v?h#Ym3e<  
           b_ac = p1y - k_ac * p1x fwxyZBr  
           k_bd = bdy / bdx R_4600  
           b_bd = p2y - k_bd * p2x Mk[_y
qoCO  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) !OWV* v2  
           p_y = k_ac * p_x + b_ac G*wn[o(^j  
        End Select s
OLo[5y'  
      rt(1) = p_x ?~S\^4]  
      rt(2) = p_y OjeM#s#N!  
     UXa3>q>  
'计算最大半径 K$' J:{yY  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) =UNzjmP503  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) +5)
;"71  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) S]{K^Q),  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) eVbHPu4  
Dim bb(5) As Single :fpYraBM  
  bb(1) = rr1 Te!q(;L`4  
  bb(2) = rr2 R0\E?9P  
  bb(3) = rr3 S <|e/![@  
  bb(4) = rr4 S|!U=&  
  nb = rr1 )Cyrs~  
For i = 1 To 4 ='OPU5(;O  
    If nb <= bb(i) Then jt-ayLq  
       nb = bb(i) eyl+D sK  
    End If 0=(5C\w2  
Next i 7=mU["raz`  
    rt(0) = Sqr(nb) yZA}WTGe  
    rr = rt() 4( ^Ht  
  End If MWsBZJR
r  
         vVZ@/D6w  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  uK="#1z cC  

}aR
V)F  
有热压工艺方面的人才或者资料分享下； uw&GXOzew9  
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 @w[WG:-+  

高手真多！

楼主威武霸气.