[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： /}>8|#U3y  
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关键点说几个： .`+~mQ Wn  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） gAsmP
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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 yGt[Qvx#  
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 +[uh);vD`G  

以下是几个重要的函数： t855|  
1.判断点在区域中函数 
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2.计算夹角函数 ~< UYJc  
3.转置函数 e#h&Xa  
4.得到区域中心点，及区域半径函数 9M9Fif.  
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） Y#V(CIDe  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Y]`=cR`/"  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single DKMkCPX%  
   cax = x2 - x1 .@nfqv7{  
   cay = y2 - y1 qG 20  
   cbx = x2 - x3 e> 9X  
   cby = y2 - y3 ,{q#U3  
   mo_jj = cax * cbx + cay * cby t-C|x)J+  
   mo_ca = Sqr(cax * cax + cay * cay) |-\anby<  
   mo_cb = Sqr(cbx * cbx + cby * cby) U ^O4HJ  
   cos_acb = mo_jj / (mo_ca * mo_cb) C/N;4  
   'ff_cos = cos_acb 5TuwXz1v  
   If cos_acb >= 1 Then MYara;k  
   nn = 0 y,&[OrCm^\  
   ElseIf cos_acb <= -1 Then lc5(^~  
   nn = 3.14159265258979 {4vWSb  
   Else jA:'P~`Hj  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) m)<+?Bv y  
   End If _7:Bxx4B  
   'ff_angle = nn %4x0^<k~  
   ff_angle = nn * 180 / 3.14159265258979 ~x'8T!M{  
End Function

'判断点在区域内函数 v:74iB$i/C  
Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean Q/Z>w+zh#  
Dim aob, boc, cod, doa, sum As Single b+whZtNk7  
  If ppx = p1x And ppy = p1y Then _IU5HT}2  
     point_in = True TeZu*c  
     Exit Function R7z @y o  
  End If 1qn/*9W}=  
  If ppx = p2x And ppy = p2y Then 5 8;OTDR!  
     point_in = True (Lz|o!>  
     Exit Function V[WZ#u-p  
  End If p(GI0
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   If ppx = p3x And ppy = p3y Then X~o;jJC  
     point_in = True b9?Vpu`?  
     Exit Function GGHeC/4  
  End If pl,XS6mB  
     n?OMfx  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 8|i<
4>  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) X[<#B5  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) m$_l{|4z  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) .7Qqs=Au  
    sum = aob + boc + cod + doa 525^/d6v  
    If 360.01 > sum And sum > 359.99 Then 1l^[%0  
       point_in = True o\Fv~^  
    Else sEw ?349Bz  
       point_in = False /\Xe'&  
    End If GYf{~J
 
End Function

'得到点半径,得到交点坐标函数 JCZ&TK  
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() s`,g4ce`  
    '求得中心点坐标 dW5r]D[Cx  
Dim tt As String 5\JV}  
Dim rt(3) As Single x=W s)&H_Y  
    '判断是否平行 OO
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   acx = p3x - p1x Mt{cX,DS  
   acy = p3y - p1y i,Jz7OX  
   bdx = p4x - p2x +W-b3R:1>  
   bdy = p4y - p2y lQ[JA[  
   If acx * bdy = acy * bdx Then Ty!V)i  
      rt(0) = 0 k{Y\YG%b  
      Exit Function 9~K>c  
   Else hlc g[Qdo*  
      '判断斜率存在否 1UrkDz?X  
      If p1x = p3x And p2x <> p4x Then rniL+/-uU  
         tt = "ac_n_bd_y" j[$+DCO#|m  
      ElseIf p1x <> p3x And p2x = p4x Then XCn;<$3w  
         tt = "ac_y_bd_n" :m'(8s8  
      ElseIf p1x <> p3x And p2x <> p4x Then q~AvxO  
         tt = "ac_y_bd_y" MScUrW!TA  
      End If =''*'a-P  
    Select Case tt =:xJZy$  
         Case "ac_n_bd_y" #^-'q`)  
            'bd线段方程 U&$I!80.  
            k_bd = bdy / bdx .OW5R*  
            b_bd = p2y - k_bd * p2x \j we  
            p_x = p1x K6~')9Q  
            p_y = k_bd * p_x + b_bd Xpkj44cd@  
         Case "ac_y_bd_n" !([v=O#
 
            'ac线段方程 QqeF   
            k_ac = acy / acx % 1<@p%y/  
            b_ac = p1y - k_ac * p1x 6is+\  
            p_x = p2x OWYY2&.h  
            p_y = k_ac * p_x + b_ac rX`fjS*C  
        Case "ac_y_bd_y" ^:O*Sx.CA  
           'ac，bd线段都要求 J04R,B  
           k_ac = acy / acx geqx":gpx9  
           b_ac = p1y - k_ac * p1x $'a]lR  
           k_bd = bdy / bdx l,b_'
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           b_bd = p2y - k_bd * p2x dftX$TS  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 1o   
           p_y = k_ac * p_x + b_ac M&/e*Ta5  
        End Select :}v:=ck  
      rt(1) = p_x QX(t@VP  
      rt(2) = p_y d;r,?/C  
     8h|~>v  
'计算最大半径 Au )%w  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 6H|T )  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ZU9RvtbKB  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) UyNP:q:  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) % <%r  
Dim bb(5) As Single W;,RU8\f  
  bb(1) = rr1 <(~geN  
  bb(2) = rr2 Tl^)O^/  
  bb(3) = rr3 k@9q5lu;T  
  bb(4) = rr4 6HVGqx  
  nb = rr1 j8t_-sU9 i  
For i = 1 To 4 7H[.o~\  
    If nb <= bb(i) Then &v r0{]V^  
       nb = bb(i) \5) ZI'q  
    End If ia-&?  
Next i 57U;\L;ZmZ  
    rt(0) = Sqr(nb) Vf(n  
    rr = rt() YE@!`!`d:  
  End If @Z
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         ^DR`!.ttr  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  |
B.tBt^  

th(<S  
有热压工艺方面的人才或者资料分享下； *b]$lj  
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 veh?oJi@  

高手真多！

楼主威武霸气.