[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： `/"rs@  
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关键点说几个： C8xxR~mq  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Mur)'  
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 N4xCZb  
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 6dNW2_  

以下是几个重要的函数： tQ@%3`  
1.判断点在区域中函数 O7Z?y*  
2.计算夹角函数 UqA<rW  
3.转置函数 DO^J=e  
4.得到区域中心点，及区域半径函数 [Zpx :r}  
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） <Wwcd8d  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 :,@\q0j"=  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single hHsN(v  
   cax = x2 - x1 ] oMtqk
iR  
   cay = y2 - y1 "G[yV>pxv  
   cbx = x2 - x3 JS^QfT,zE  
   cby = y2 - y3 mWP1mc:M(  
   mo_jj = cax * cbx + cay * cby J6C/`)+w  
   mo_ca = Sqr(cax * cax + cay * cay) _no;B_m~  
   mo_cb = Sqr(cbx * cbx + cby * cby) DTMoZm  
   cos_acb = mo_jj / (mo_ca * mo_cb) fN!lXPgM  
   'ff_cos = cos_acb
y[64O x  
   If cos_acb >= 1 Then (oxMBd+n1  
   nn = 0 ;_oJGII?br  
   ElseIf cos_acb <= -1 Then 0|=
,!sY  
   nn = 3.14159265258979 y(fJ{k   
   Else n([9U0!gu  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) +I>V9%%vW_  
   End If !j8 DCVb  
   'ff_angle = nn ^Mmsja5K  
   ff_angle = nn * 180 / 3.14159265258979 5@-[[ $dk  
End Function

'判断点在区域内函数 /=K(5Xd  
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 Gpf9uj%  
Dim aob, boc, cod, doa, sum As Single Iy#=Nq=  
  If ppx = p1x And ppy = p1y Then _C
54l  
     point_in = True nXT/zfS  
     Exit Function *w`_(Xf  
  End If Z'!i"Jzq|{  
  If ppx = p2x And ppy = p2y Then hQ@E2Xsv  
     point_in = True 'D:R]@eK]  
     Exit Function R KXhD PA  
  End If xS+!/pBf"Y  
   If ppx = p3x And ppy = p3y Then =fcM2O#$  
     point_in = True X8\UTHT&0  
     Exit Function + usB$=kJ  
  End If Mpx98xcO  
     5rH?FQE  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ]RxJ^'a63  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ?D_^8
\R  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) )qua0'y]@  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ~Z:)Y*  
    sum = aob + boc + cod + doa @:Emmzucv|  
    If 360.01 > sum And sum > 359.99 Then vI20G89E  
       point_in = True r7jh)Q;BbR  
    Else {`ByZB  
       point_in = False "DC L Z  
    End If >K!$@]2F  
End Function

'得到点半径,得到交点坐标函数 sQmJ3 (:HO  
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() jx#9  
    '求得中心点坐标 69S*\'L  
Dim tt As String 6F_:,b^  
Dim rt(3) As Single g=$nNQ \6=  
    '判断是否平行 8[H bg  
   acx = p3x - p1x FA{'Ki`  
   acy = p3y - p1y _`lPLBr6  
   bdx = p4x - p2x ,B#*<_?E5  
   bdy = p4y - p2y 'iU+mRLp  
   If acx * bdy = acy * bdx Then CT/>x3o  
      rt(0) = 0 E>N[  
      Exit Function 0|6Y%a\U  
   Else #y f  
      '判断斜率存在否 `LNKbTc[m  
      If p1x = p3x And p2x <> p4x Then ?_d3
|]N  
         tt = "ac_n_bd_y" Md&K#)9,(  
      ElseIf p1x <> p3x And p2x = p4x Then >avkiT2  
         tt = "ac_y_bd_n" <m,bP c :R  
      ElseIf p1x <> p3x And p2x <> p4x Then )4RSo&9p`  
         tt = "ac_y_bd_y" P2F8[o!<  
      End If QJSi|&Rx&?  
    Select Case tt Te`MIR  
         Case "ac_n_bd_y" uNca@xl'  
            'bd线段方程 `{NbMc\ ]  
            k_bd = bdy / bdx ( 6ucA  
            b_bd = p2y - k_bd * p2x i (`Q{l  
            p_x = p1x C@g/{?\  
            p_y = k_bd * p_x + b_bd ]*D~>q"#\  
         Case "ac_y_bd_n" 4|UtE<<b  
            'ac线段方程 }:S}jo7  
            k_ac = acy / acx +LlAGg]Z  
            b_ac = p1y - k_ac * p1x -b)3+#f  
            p_x = p2x fg/hUUl  
            p_y = k_ac * p_x + b_ac p!EG:B4  
        Case "ac_y_bd_y" '
;m;K (g  
           'ac，bd线段都要求 :kC*<f\  
           k_ac = acy / acx V`rxjv}!  
           b_ac = p1y - k_ac * p1x iI3,q-LA  
           k_bd = bdy / bdx ,ZVhL* "  
           b_bd = p2y - k_bd * p2x OVE?;x>n/1  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 2t?Vl%<  
           p_y = k_ac * p_x + b_ac \0Ba?  
        End Select S263h(H  
      rt(1) = p_x ,BR W=  
      rt(2) = p_y `~D{]'j  
     kG5Uc83#G  
'计算最大半径 ^\r{72!y  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) R5\|pC  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) @+a}O  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) nd[Ja_h  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) s
q@c?!'  
Dim bb(5) As Single 6Ilj7m*  
  bb(1) = rr1 !$#5E1:\  
  bb(2) = rr2 =}0$|@pl  
  bb(3) = rr3 39d$B'"<1  
  bb(4) = rr4 xIH= gK  
  nb = rr1 Ap 3B'  
For i = 1 To 4 `XM0Mm%  
    If nb <= bb(i) Then +|H,N7a<  
       nb = bb(i) _UY=y^ c0>  
    End If S4rm K&  
Next i >U(E \`9D  
    rt(0) = Sqr(nb) DcG=u24Xy!  
    rr = rt() E,fbIyX  
  End If w_DaldK*  
         AmQsay#I_  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15) 
tf1Y5P$  

|uX&T`7?-  
有热压工艺方面的人才或者资料分享下； pW>.3pj  
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 dEor+5}  

高手真多！

楼主威武霸气.