[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： z 61Fq  
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关键点说几个： Z:2%gU&W  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） n(SeJk%>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 q{f (T\  
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 d%E*P4Ua  

以下是几个重要的函数： mSk";UCn  
1.判断点在区域中函数 0c,!<\B  
2.计算夹角函数 y,qn9  
3.转置函数 aH_
FBY  
4.得到区域中心点，及区域半径函数 ;r.#|b  
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） f<'D?d)L^  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 T!^v^m@>y  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Wy /5Qw~s  
   cax = x2 - x1 = U[$i"+  
   cay = y2 - y1 ,zZ@QW5  
   cbx = x2 - x3 !lM.1gTTC  
   cby = y2 - y3 ' hdLQ\J  
   mo_jj = cax * cbx + cay * cby P=s3&NDD  
   mo_ca = Sqr(cax * cax + cay * cay) joNV4v"=`  
   mo_cb = Sqr(cbx * cbx + cby * cby) jc,Qg2  
   cos_acb = mo_jj / (mo_ca * mo_cb) DwWm(8&6;}  
   'ff_cos = cos_acb us.IdG  
   If cos_acb >= 1 Then OXB 5W#$  
   nn = 0 X|}Q4T`  
   ElseIf cos_acb <= -1 Then G+I->n-s4  
   nn = 3.14159265258979 J-5kvQi8  
   Else )lJi7 ^,  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) d\8j!F^=  
   End If a=6@} l1<  
   'ff_angle = nn 8m[o*E.4F  
   ff_angle = nn * 180 / 3.14159265258979 DUg[L
 
End Function

'判断点在区域内函数 %:sP#BQM  
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 0w vAtK|Q  
Dim aob, boc, cod, doa, sum As Single 7`^=Ie%(K  
  If ppx = p1x And ppy = p1y Then ~n(L
BA  
     point_in = True ^ q3H  
     Exit Function Lg7dJnf  
  End If ^/xb-tuV  
  If ppx = p2x And ppy = p2y Then 6 B7F  
     point_in = True *)vy%\  
     Exit Function R0bgt2J  
  End If 64^l/D(  
   If ppx = p3x And ppy = p3y Then =-qYp0sVP  
     point_in = True 7g%\+%F I  
     Exit Function kUr/*an  
  End If ?JW/Stua
 
     =?N$0F!  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) %_~1(Glz  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) bw!
*=<  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) f'BmIFb#  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) j+>N&.zs
 
    sum = aob + boc + cod + doa 0_=^#r4Mu  
    If 360.01 > sum And sum > 359.99 Then BJ5^-|  
       point_in = True ;*d?Qe:  
    Else Q!I><u  
       point_in = False n;~'W*Ln0  
    End If kjt(OFh'Y+  
End Function

'得到点半径,得到交点坐标函数 m';4`Y5-  
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() #eF k  
    '求得中心点坐标 Y^XZ.R  
Dim tt As String NFf`V  
Dim rt(3) As Single  xS="o  
    '判断是否平行 r?pN-x$M=  
   acx = p3x - p1x jHV) TBr  
   acy = p3y - p1y X+/^s)  
   bdx = p4x - p2x 7&(h_}Z  
   bdy = p4y - p2y _T;Kn'Gz(&  
   If acx * bdy = acy * bdx Then DU-dIqi  
      rt(0) = 0 Q<yvpT(  
      Exit Function :!FGvR6  
   Else WtXf~ :R  
      '判断斜率存在否 aPX'CG4m  
      If p1x = p3x And p2x <> p4x Then &G?w*w_n  
         tt = "ac_n_bd_y" } V"A;5j`  
      ElseIf p1x <> p3x And p2x = p4x Then jY ;Hdb''  
         tt = "ac_y_bd_n" |;"(C# B  
      ElseIf p1x <> p3x And p2x <> p4x Then Jn9{@??  
         tt = "ac_y_bd_y" &gI*[5v  
      End If 4.>y[_vu  
    Select Case tt we kb&?  
         Case "ac_n_bd_y" (^]3l%Ed  
            'bd线段方程 d^0-|sx  
            k_bd = bdy / bdx 474 oVdGx  
            b_bd = p2y - k_bd * p2x +=*ND<$n/E  
            p_x = p1x }{[JS=A^  
            p_y = k_bd * p_x + b_bd 4~hP25q  
         Case "ac_y_bd_n" )r(e\_n  
            'ac线段方程 :*cd$s  
            k_ac = acy / acx M7YbRl  
            b_ac = p1y - k_ac * p1x 3~LNz8Z*  
            p_x = p2x X<f4X"y  
            p_y = k_ac * p_x + b_ac :z\||f  
        Case "ac_y_bd_y" H)Z$j&S{  
           'ac，bd线段都要求 m]}EVa_I`/  
           k_ac = acy / acx 7Oi<_b  
           b_ac = p1y - k_ac * p1x TeyF
q0j@'  
           k_bd = bdy / bdx >A}ra^gU  
           b_bd = p2y - k_bd * p2x '"h}l`  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) Gc;-zq  
           p_y = k_ac * p_x + b_ac %2^V.`0T  
        End Select BG6Lky/omz  
      rt(1) = p_x "S>VqvH3  
      rt(2) = p_y Eks<
O  
     0;%\L:,O  
'计算最大半径 7>EMr}f C  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) \[/}Cy  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Q v},X~^R  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) !lp7}[k<y  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 9QeBz`lm)  
Dim bb(5) As Single TjpAJW@-  
  bb(1) = rr1 v7@*dg  
  bb(2) = rr2 B|=S-5pv*  
  bb(3) = rr3 8L`wib2  
  bb(4) = rr4 1\
/~>  
  nb = rr1 nd5.Py$  
For i = 1 To 4 6}*4co  
    If nb <= bb(i) Then BT f  
       nb = bb(i) I,r0K]  
    End If `*i:z'  
Next i !.O;S
G  
    rt(0) = Sqr(nb) }$a*XY1  
    rr = rt() <<9|*Tz  
  End If JZqJ& 
 
         %iZ~RTY6 !  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  v\5`n@}4  

cY|@s?3NND  
有热压工艺方面的人才或者资料分享下； Z_Y gV:jc  
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 O#)YbaE  

高手真多！

楼主威武霸气.