[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： |nMg.t`8  
z#|tcHVFT  
99YgQ Y]HO  

关键点说几个： Q
^{XM  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） h0oe'Xov  
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 qGXY  
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 ]5',`~jkF  

以下是几个重要的函数： Ow50M;E  
1.判断点在区域中函数 v vzPt.ag  
2.计算夹角函数 ^:u-wr8?{  
3.转置函数 )&s9QBo{b  
4.得到区域中心点，及区域半径函数 sP~;i qk  
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） ?ocBRla  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 O~#A )d6  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single +yI2G! $T9  
   cax = x2 - x1 >+9:31p  
   cay = y2 - y1 pCC3r t(  
   cbx = x2 - x3 ] B?NDxU  
   cby = y2 - y3 Yq>K1E|  
   mo_jj = cax * cbx + cay * cby Jbn^G7vH<6  
   mo_ca = Sqr(cax * cax + cay * cay) \OwCZ!`7i  
   mo_cb = Sqr(cbx * cbx + cby * cby) _%wB*u,X  
   cos_acb = mo_jj / (mo_ca * mo_cb) `Jj q5:\&  
   'ff_cos = cos_acb :{s0tw>Z  
   If cos_acb >= 1 Then }z F,dst  
   nn = 0 b#(X+I  
   ElseIf cos_acb <= -1 Then D]twid~OS  
   nn = 3.14159265258979 &EhOSu  
   Else O$7
cN\Z  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Z.b?Jz
j  
   End If _H"_&m$aDm  
   'ff_angle = nn AAF']z<4_"  
   ff_angle = nn * 180 / 3.14159265258979 TDX~?>P  
End Function

'判断点在区域内函数 tB`IBuy9!"  
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 bPIo9clq  
Dim aob, boc, cod, doa, sum As Single 2^qJ'<2]M  
  If ppx = p1x And ppy = p1y Then Rh%A^j@  
     point_in = True .I]EP-  
     Exit Function NNMn
,J  
  End If -^JPY)\R  
  If ppx = p2x And ppy = p2y Then B r6tgoA  
     point_in = True |-TxX:O-  
     Exit Function IEe;ygL#  
  End If 1'H!S%fS  
   If ppx = p3x And ppy = p3y Then R5xV_;wD  
     point_in = True '$[a-)4  
     Exit Function IP^1ca#<  
  End If -b)3+#f  
     )<$<9!L4x  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) !AGoI7W}  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 8Vy/n^3)  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) U#%+FLX@w  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) H`,t"I  
    sum = aob + boc + cod + doa f?TS#jG4}  
    If 360.01 > sum And sum > 359.99 Then XePGOw))O  
       point_in = True  `)>}b 3  
    Else 8\G"I  
       point_in = False `Ue5;<K-/  
    End If *;l[|  
End Function

'得到点半径,得到交点坐标函数 :\C/mT3xL)  
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() ?J-D6;  
    '求得中心点坐标 30<_`  
Dim tt As String :(
4q\~  
Dim rt(3) As Single .*Bd'\:F/q  
    '判断是否平行 ,t!I%r  
   acx = p3x - p1x Oc-ia)v1G  
   acy = p3y - p1y oi8M6l  
   bdx = p4x - p2x Y~w1_>b  
   bdy = p4y - p2y +O)ZB$w4  
   If acx * bdy = acy * bdx Then PS0/Ok  
      rt(0) = 0 EKS?3z%!  
      Exit Function Ec^2tx"=  
   Else P76gJ@#m  
      '判断斜率存在否 >qUD_U3A  
      If p1x = p3x And p2x <> p4x Then "rVM23@ tq  
         tt = "ac_n_bd_y" &*oljGt8  
      ElseIf p1x <> p3x And p2x = p4x Then xe9\5Gb}  
         tt = "ac_y_bd_n" }h* j{b,  
      ElseIf p1x <> p3x And p2x <> p4x Then SwaMpNXL  
         tt = "ac_y_bd_y" ;,7m  
      End If %cJdVDW`L  
    Select Case tt ,1]VY/  
         Case "ac_n_bd_y" )|#ExyRO  
            'bd线段方程 1~j,A[&|<  
            k_bd = bdy / bdx @jq H8  
            b_bd = p2y - k_bd * p2x MZqHL4<|  
            p_x = p1x J% ZM V  
            p_y = k_bd * p_x + b_bd >U?#'e{qW  
         Case "ac_y_bd_n" +{}p(9w@  
            'ac线段方程 Sy<io@df  
            k_ac = acy / acx c._!dq&#R  
            b_ac = p1y - k_ac * p1x b<[]z,  
            p_x = p2x ?A~=.u@[d  
            p_y = k_ac * p_x + b_ac # %'%LY=  
        Case "ac_y_bd_y" AS0mMHJk  
           'ac，bd线段都要求 l@]Fzl  
           k_ac = acy / acx 1lJ^$U  
           b_ac = p1y - k_ac * p1x ;F"Tu  
           k_bd = bdy / bdx .4[M-@4+]  
           b_bd = p2y - k_bd * p2x ?}S!8;d  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) T
'9M  
           p_y = k_ac * p_x + b_ac "{3MXAFe  
        End Select NRk^Z)  
      rt(1) = p_x 88 ca  
      rt(2) = p_y 8#4Gs Q"  
     ;yCtk ~T%  
'计算最大半径 >5zD0!bA  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) _d+` Gw  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) &)|f|\yh"  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) YG)7+94  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) wRq f'  
Dim bb(5) As Single jS5K:yx<  
  bb(1) = rr1 Yp8XZ3  
  bb(2) = rr2 8%xiHPVg  
  bb(3) = rr3 woN d7`C}7  
  bb(4) = rr4 QUF1_Sa  
  nb = rr1 zy~*~;6tW  
For i = 1 To 4 pK'D(t  
    If nb <= bb(i) Then zm4e+v-  
       nb = bb(i) QkLcs6)R  
    End If p%/lP{  
Next i y+izC+  
    rt(0) = Sqr(nb) = N:5#A  
    rr = rt() E/D@;Ym18  
  End If q^~w:$^U  
         yA`,ns&n  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ~e+pa|lO  

`L.nj6F  
有热压工艺方面的人才或者资料分享下； kO,vHg$  
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 a!;K+wL >  

高手真多！

楼主威武霸气.