[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： -t-tn22  
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关键点说几个： $x
gBKD  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） J/x2qQ$9  
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 {?8B,G2r  
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 CIC
[1,  

以下是几个重要的函数： \2e0|)aF6  
1.判断点在区域中函数 U5r}6D!)  
2.计算夹角函数 G}zZQy  
3.转置函数 tkKJh !Q7  
4.得到区域中心点，及区域半径函数 kxB.,'  
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） 5Av=3[kh"%  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 !q"cpL'4  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single lCT{v@pp  
   cax = x2 - x1 e":G*2a  
   cay = y2 - y1 k!L@GQ  
   cbx = x2 - x3 *%FA:Y  
   cby = y2 - y3 gE7L L=x  
   mo_jj = cax * cbx + cay * cby 5<YzalNf  
   mo_ca = Sqr(cax * cax + cay * cay) ;{Ux_JEg  
   mo_cb = Sqr(cbx * cbx + cby * cby) t*S." q  
   cos_acb = mo_jj / (mo_ca * mo_cb) M[]A2'fS  
   'ff_cos = cos_acb chI.{R
j  
   If cos_acb >= 1 Then :l u5Uu~  
   nn = 0 TLa]O1=Bf.  
   ElseIf cos_acb <= -1 Then evuZY X@  
   nn = 3.14159265258979 @mQ:7-,~  
   Else OjE`1h\  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) sy5 Fn~\R  
   End If 2\<.0  
   'ff_angle = nn :D:DnVZ-[@  
   ff_angle = nn * 180 / 3.14159265258979 IVxWxM*N<  
End Function

'判断点在区域内函数 cI0 ]}S  
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 4Ft1@  
Dim aob, boc, cod, doa, sum As Single ?=Pd  
  If ppx = p1x And ppy = p1y Then 6=GZLpv  
     point_in = True ~%k?L4%  
     Exit Function LJlZ^kh  
  End If eDKxn8+(H  
  If ppx = p2x And ppy = p2y Then S::=85[>z  
     point_in = True >h~IfZU1  
     Exit Function &dB-r&4;+  
  End If .^(/n9|o-  
   If ppx = p3x And ppy = p3y Then }WLh8i?_  
     point_in = True Pt,
ebL~  
     Exit Function y2L#:[8  
  End If %r{3wH#D@  
     )(M7lq.e7  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) /u<nLj1  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) OW;tT=ql  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) gk0.zz([  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) $rB3m~c|  
    sum = aob + boc + cod + doa 3Hi+Z}8  
    If 360.01 > sum And sum > 359.99 Then -T@`hk`  
       point_in = True T.e.{yO  
    Else >H][.@LyR  
       point_in = False \;5\
9B"i  
    End If s54nF\3V  
End Function

'得到点半径,得到交点坐标函数 nwI3|&  
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() =HDI \LD<  
    '求得中心点坐标 F t&+vS  
Dim tt As String M5L{*>4|6  
Dim rt(3) As Single 4Aes#{R3v  
    '判断是否平行 ^y.nDs%ZT7  
   acx = p3x - p1x IV16d  
   acy = p3y - p1y )P&9A)8  
   bdx = p4x - p2x nv0@xnbz  
   bdy = p4y - p2y .\Fss(Zn  
   If acx * bdy = acy * bdx Then 9;t]Hp_+K  
      rt(0) = 0 'vV$]/wBF  
      Exit Function `NRH9l>B7  
   Else 83~ i:+;  
      '判断斜率存在否 }3
m0AQ;K  
      If p1x = p3x And p2x <> p4x Then _mE^rT  
         tt = "ac_n_bd_y" | $^;wP  
      ElseIf p1x <> p3x And p2x = p4x Then kfb/n)b'  
         tt = "ac_y_bd_n" shC;hR&;  
      ElseIf p1x <> p3x And p2x <> p4x Then .Ce8L&cU  
         tt = "ac_y_bd_y" \0;(VLN'U  
      End If 8;P2A\X  
    Select Case tt 
] f>]n  
         Case "ac_n_bd_y" M
hEw _{?  
            'bd线段方程 t G.(flW,  
            k_bd = bdy / bdx &-yGVx  
            b_bd = p2y - k_bd * p2x V3N0Og3  
            p_x = p1x o5o^TW{  
            p_y = k_bd * p_x + b_bd ?8@>6IXn  
         Case "ac_y_bd_n" 5ABhj*7  
            'ac线段方程 l.)}t)my}  
            k_ac = acy / acx e;YW6}'}  
            b_ac = p1y - k_ac * p1x 4EP<tV  
            p_x = p2x ws/63d
*  
            p_y = k_ac * p_x + b_ac h[tix:  
        Case "ac_y_bd_y" ?^#lWx q  
           'ac，bd线段都要求 >RI>J.~  
           k_ac = acy / acx <G8w[hs  
           b_ac = p1y - k_ac * p1x T$4P_*  
           k_bd = bdy / bdx Y(
VJbm`  
           b_bd = p2y - k_bd * p2x |+IZS/W"  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) Y
d cK
&{  
           p_y = k_ac * p_x + b_ac aT  l c  
        End Select Oc?+M 5  
      rt(1) = p_x {U!St@  
      rt(2) = p_y O;Y:uHf  
     Q/>L_S  
'计算最大半径 I8Vb-YeS  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) #_ C  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) NF$\^WvYSP  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) O%!5<8Xrb  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) .y5,x\Pq(  
Dim bb(5) As Single ,.IEDF<&  
  bb(1) = rr1 JWP*>\P  
  bb(2) = rr2 ZUXr!v/R:1  
  bb(3) = rr3 7cg*|E@  
  bb(4) = rr4 zW |=2oX2  
  nb = rr1 7EhN u@5-  
For i = 1 To 4 'BMy8  
    If nb <= bb(i) Then cTZ.}eLh  
       nb = bb(i) xvLn'8H.  
    End If m(OvD!  
Next i >?W[PQ5yx  
    rt(0) = Sqr(nb) lb'Cl3H  
    rr = rt() _A_ A$N~9  
  End If BfTcI)  
         [|`U6 8}u  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  R_P}~l  

-XoPia2  
有热压工艺方面的人才或者资料分享下； > Vb@[  
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 >/f_F6ay#  

高手真多！

楼主威武霸气.