[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： ,aeQXI#@  
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关键点说几个： (MY#;v\AYE  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） CnSfGsE>  
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 /vll*}}  
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 eqU2>bIf  

以下是几个重要的函数： C,~wmS )@  
1.判断点在区域中函数 0{^vqh.La  
2.计算夹角函数 T]-yTsto  
3.转置函数 zs e<b/G1G  
4.得到区域中心点，及区域半径函数 wwrP7T+d  
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） dU1w)Y  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ph{p[QI:{X  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single z%$ E6Im  
   cax = x2 - x1 ~\kJir  
   cay = y2 - y1 DX GClH  
   cbx = x2 - x3 R,R[.2Vi  
   cby = y2 - y3 5v <>%=  
   mo_jj = cax * cbx + cay * cby )]WWx-Uf'  
   mo_ca = Sqr(cax * cax + cay * cay) U/F<r3.`#  
   mo_cb = Sqr(cbx * cbx + cby * cby) $2B_a  
   cos_acb = mo_jj / (mo_ca * mo_cb) Ri4t/H  
   'ff_cos = cos_acb N`XJA-
DE  
   If cos_acb >= 1 Then x{{QS$6v  
   nn = 0 i)9}+M5  
   ElseIf cos_acb <= -1 Then i{[=N9U5o  
   nn = 3.14159265258979 )OQhtxK  
   Else U<,@u,_Ja  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) u$ [R>l9  
   End If L08>9tf`  
   'ff_angle = nn e~R; 2bk  
   ff_angle = nn * 180 / 3.14159265258979 Vij P;  
End Function

'判断点在区域内函数 W}m-5L  
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 V.zKjoky@  
Dim aob, boc, cod, doa, sum As Single q-s! hiK  
  If ppx = p1x And ppy = p1y Then q/y4HT,x  
     point_in = True
272j$T  
     Exit Function L9tjHC]
 
  End If ZeewGa^r  
  If ppx = p2x And ppy = p2y Then XMhDx  
     point_in = True @X`~r8&  
     Exit Function AA][}lU:5  
  End If [MSLVTR  
   If ppx = p3x And ppy = p3y Then 9~+A<X]Hd  
     point_in = True *hVbjI$  
     Exit Function mF!/8qk   
  End If )aoB-Lu  
     D|-^}I4  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) f[,9WkC  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ?^Sk17G  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) !iKR~&UpAL  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) y,qP$5xiq  
    sum = aob + boc + cod + doa _&S?uz m  
    If 360.01 > sum And sum > 359.99 Then .K?',x  
       point_in = True p- 5)J&  
    Else JA W}]:jC  
       point_in = False &
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    End If }~P%S(zB  
End Function

'得到点半径,得到交点坐标函数 WqN=D5  
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() |\Nj  
    '求得中心点坐标 j,Sg?&"%=  
Dim tt As String `abQlBb*  
Dim rt(3) As Single vQrce&  
    '判断是否平行 @rs(`4QEh  
   acx = p3x - p1x #.O,JG#H  
   acy = p3y - p1y SNP.n))   
   bdx = p4x - p2x qGMM3a)Q  
   bdy = p4y - p2y qh Ezv~  
   If acx * bdy = acy * bdx Then pT]M]/y/:  
      rt(0) = 0 SsA;T5:6  
      Exit Function }qfr&Ffh@  
   Else w?CbATQ   
      '判断斜率存在否 dDH+`;$.  
      If p1x = p3x And p2x <> p4x Then g-'y_'%0G  
         tt = "ac_n_bd_y" D|I(2%aC  
      ElseIf p1x <> p3x And p2x = p4x Then h"VQFqQy  
         tt = "ac_y_bd_n" 0
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      ElseIf p1x <> p3x And p2x <> p4x Then &{QB}r  
         tt = "ac_y_bd_y" d7N;Fa3yL  
      End If XfA3Ez,}  
    Select Case tt `}o4&$  
         Case "ac_n_bd_y" `NA[zH,w3  
            'bd线段方程 G%)?jg@EA  
            k_bd = bdy / bdx WujIaJt-  
            b_bd = p2y - k_bd * p2x 7}bjJR "  
            p_x = p1x GZT}aMMSJ  
            p_y = k_bd * p_x + b_bd <B

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         Case "ac_y_bd_n" P# 2&?.d\  
            'ac线段方程 A9PXu\%y  
            k_ac = acy / acx \3K6NA!L  
            b_ac = p1y - k_ac * p1x KtJE  
            p_x = p2x Ab7hW(/  
            p_y = k_ac * p_x + b_ac gd<8RVA  
        Case "ac_y_bd_y" Cw?AP6f%  
           'ac，bd线段都要求 o;Ijv\Em  
           k_ac = acy / acx RAKQ+Y"nl  
           b_ac = p1y - k_ac * p1x A/N*Nc  
           k_bd = bdy / bdx XuJwZN!(  
           b_bd = p2y - k_bd * p2x %sC,;^wla'  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) (ohkM`83k  
           p_y = k_ac * p_x + b_ac vl$! To9R"  
        End Select S-Va_t$  
      rt(1) = p_x ]i*q*]x2u  
      rt(2) = p_y rh2pVDS  
     R#~}ZUk2  
'计算最大半径 vZ 4Z+;.  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) b qB[vPsI  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 'R*gSqx~  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) =1^a/  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) .G+}Kn9!  
Dim bb(5) As Single o^RdVSkU;  
  bb(1) = rr1 n ! qm  
  bb(2) = rr2 cb&y8!ci~  
  bb(3) = rr3 QxnP+U~N  
  bb(4) = rr4 x$CpUy{6  
  nb = rr1 oSNB\G<  
For i = 1 To 4 8DTk<5mW~  
    If nb <= bb(i) Then ..FUg"sSO  
       nb = bb(i) iM2 EEC  
    End If 3sGrX"0D  
Next i MIa].S#  
    rt(0) = Sqr(nb) L:YsAv  
    rr = rt() QOuy(GY  
  End If GQqw(2Ub}  
         1E$
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End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  1pzU=!R?-O  

xmiF!R  
有热压工艺方面的人才或者资料分享下； !Z=`Wk5  
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 [*}[W6 3v  

高手真多！

楼主威武霸气.