[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： jO'+r'2B9  
-$pS {q;  
]TTX<R ZLr  

关键点说几个： nJ/wtw  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） W":is"  
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 c"ukV_6~J  
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 >M.?qs4  

以下是几个重要的函数： yI9~LTlA3  
1.判断点在区域中函数 5qco4@8  
2.计算夹角函数 4)=LOGW  
3.转置函数 pL$UI3VCP  
4.得到区域中心点，及区域半径函数 RVN"lDGA  
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） fFXG;Q8&  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 J'.:l}g!1  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ssW+'GD  
   cax = x2 - x1 Df;FOTTi%  
   cay = y2 - y1 e,zR  
   cbx = x2 - x3 /vPh_1  
   cby = y2 - y3 9bjjo;A  
   mo_jj = cax * cbx + cay * cby lj.z>  
   mo_ca = Sqr(cax * cax + cay * cay) )rD] y2^<  
   mo_cb = Sqr(cbx * cbx + cby * cby) wgSA6mQZ  
   cos_acb = mo_jj / (mo_ca * mo_cb) pTZPOv#?Q  
   'ff_cos = cos_acb 
,[+  
   If cos_acb >= 1 Then zQxZR}'  
   nn = 0 P,!W\N%3  
   ElseIf cos_acb <= -1 Then o_U=]mEDY  
   nn = 3.14159265258979 MoA2Cp;8X  
   Else h 88iZK  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) .hgc1  
   End If 1W-t})!a  
   'ff_angle = nn D0PP   
   ff_angle = nn * 180 / 3.14159265258979 n6WSTh  
End Function

'判断点在区域内函数 `a:@[0r0U  
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 ,e>C)wq;  
Dim aob, boc, cod, doa, sum As Single 5gI@~h S  
  If ppx = p1x And ppy = p1y Then F$ Us! NN  
     point_in = True c@ En4[a'  
     Exit Function DcoTa-~  
  End If H1|X0a(j  
  If ppx = p2x And ppy = p2y Then ix^:qw;  
     point_in = True Mim 9C]h(  
     Exit Function Du$kDCU  
  End If gU>Y  
   If ppx = p3x And ppy = p3y Then ]G&?e9OA  
     point_in = True 4_PMl6qo  
     Exit Function N&S:=x:$S  
  End If 9|jIrS%/~  
     (0D0G-r:  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Q(AOKp,F  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y)  ceVej'  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) &Z=}
H0y q  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) w[PW-m^`  
    sum = aob + boc + cod + doa /c/!13|  
    If 360.01 > sum And sum > 359.99 Then L7n->8Qk  
       point_in = True B_`A[0H  
    Else @[zPN[z.  
       point_in = False BAmH2"  
    End If @z dmB~C  
End Function

'得到点半径,得到交点坐标函数 7_#v_ A^  
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() X/5tZ@  
    '求得中心点坐标 3zWY%(8t4?  
Dim tt As String ?Dd2k%o  
Dim rt(3) As Single zCO5`%14  
    '判断是否平行 w'M0Rd]  
   acx = p3x - p1x c)@M7UK[  
   acy = p3y - p1y $6fHY\i#R  
   bdx = p4x - p2x %PlPXoG=  
   bdy = p4y - p2y .RJvu$U2j  
   If acx * bdy = acy * bdx Then n0Ze9W+<  
      rt(0) = 0 ?/#HTg)!B  
      Exit Function
q#sMew\{  
   Else Gjy'30IF  
      '判断斜率存在否 \iowAo$  
      If p1x = p3x And p2x <> p4x Then =\X<UA}  
         tt = "ac_n_bd_y" ^Po\:x%o  
      ElseIf p1x <> p3x And p2x = p4x Then s%4)}w;z  
         tt = "ac_y_bd_n" s)/i_Oe$\  
      ElseIf p1x <> p3x And p2x <> p4x Then
,iSs2&$m  
         tt = "ac_y_bd_y" \,p)  
      End If  Kn\Oj=4  
    Select Case tt rQisk8%  
         Case "ac_n_bd_y" ?0'bf y]  
            'bd线段方程 fM S-  
            k_bd = bdy / bdx Vx* =  
            b_bd = p2y - k_bd * p2x 3:
mF!  
            p_x = p1x f_raICO{R  
            p_y = k_bd * p_x + b_bd A FfgGO  
         Case "ac_y_bd_n" %HYC-TF#  
            'ac线段方程 8(Z*Vz uu  
            k_ac = acy / acx P7u5Ykc*  
            b_ac = p1y - k_ac * p1x hC6$>tl  
            p_x = p2x C8&)-v|  
            p_y = k_ac * p_x + b_ac k(VA5upCs  
        Case "ac_y_bd_y" {R1jysGtD  
           'ac，bd线段都要求 #+Vvf
  
           k_ac = acy / acx #XJYkaL  
           b_ac = p1y - k_ac * p1x /-BplU*"9  
           k_bd = bdy / bdx p[Q
   
           b_bd = p2y - k_bd * p2x lX5(KUN
 
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ,dh*GJ{5  
           p_y = k_ac * p_x + b_ac {'d?vm!r  
        End Select P\N`E?lJL  
      rt(1) = p_x 2d$hgR#v  
      rt(2) = p_y I[[rVts  
     lfj>]om$  
'计算最大半径 EWqKd/  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) IK%j+UB  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) O^:Rm=,$  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) l'3NiIX  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) t}'Oh}CG  
Dim bb(5) As Single $fnFi|-  
  bb(1) = rr1 e
j!C^  
  bb(2) = rr2 <'GI<Hc  
  bb(3) = rr3 /1MO]u\  
  bb(4) = rr4 w,`x(!&  
  nb = rr1 NsJUruN  
For i = 1 To 4 Ns1u0$fg  
    If nb <= bb(i) Then +(|T\%$DT  
       nb = bb(i) n$b/@hp$z  
    End If =euoSH D
}  
Next i SrHRpxy  
    rt(0) = Sqr(nb) X.T.^}=  
    rr = rt() pazFVzT  
  End If EzG7RjW  
         q~l&EH0  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  0e/~H^,SQ  

My5X%)T>P  
有热压工艺方面的人才或者资料分享下； + ^~n09  
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 W6jB!W  

高手真多！

楼主威武霸气.