[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： E6BW&Xp  
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关键点说几个： ca$D|3  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） I%pQ2T$;  
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 Rm6<"SLV  
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 Cc9<ABv?  

以下是几个重要的函数： 0^tF_."Y  
1.判断点在区域中函数 b(K.p?bt  
2.计算夹角函数 B*K%&w10~  
3.转置函数 pHKj*Y  
4.得到区域中心点，及区域半径函数 _d)w, ;m#  
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） IjD: hR@
 
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Hm%[d;Z7  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 1rTA0+
h  
   cax = x2 - x1 TkmN.@w_C  
   cay = y2 - y1 fM \T^X  
   cbx = x2 - x3 }evc]?1(  
   cby = y2 - y3 bbS'ZkB\  
   mo_jj = cax * cbx + cay * cby G }TT-  
   mo_ca = Sqr(cax * cax + cay * cay) wf<uG|90  
   mo_cb = Sqr(cbx * cbx + cby * cby) 
6WI_JbT~  
   cos_acb = mo_jj / (mo_ca * mo_cb) ()3+!};  
   'ff_cos = cos_acb $F;$-2  
   If cos_acb >= 1 Then 4hZ-^AL"(  
   nn = 0 >PL/>   
   ElseIf cos_acb <= -1 Then (47jop0RDQ  
   nn = 3.14159265258979 ^J\
)cw  
   Else TDy@Y> )  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ;k(|ynXv  
   End If }me]?en_Ra  
   'ff_angle = nn eHd{'J<  
   ff_angle = nn * 180 / 3.14159265258979 j3sUZg|d  
End Function

'判断点在区域内函数 lr,hF1r&Y  
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 B=|yjA'Fg  
Dim aob, boc, cod, doa, sum As Single QO%>RG  
  If ppx = p1x And ppy = p1y Then _mA[^G=gY  
     point_in = True Tb:n6a@  
     Exit Function {RwwSqJ  
  End If I{B8'n{cN  
  If ppx = p2x And ppy = p2y Then "c1vW<;  
     point_in = True Ya304Pjd  
     Exit Function T-f+<Cxf  
  End If AUzJ:([V  
   If ppx = p3x And ppy = p3y Then '00DUUa  
     point_in = True r$G;^  
     Exit Function yd#4b`8U`  
  End If P8z++h  
     x\I9J4Q  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) q\d'}:kfu  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) oV,>u5:B  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) pd>EUdbrp&  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) h#;fBQ]   
    sum = aob + boc + cod + doa n3~xiQ'  
    If 360.01 > sum And sum > 359.99 Then ~A>3k2N/e  
       point_in = True Vu;tU.  
    Else (O/hu3
 
       point_in = False |Z#)1K  
    End If *kZJ  
End Function

'得到点半径,得到交点坐标函数 ,f}s!>j  
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() V..m2nQj  
    '求得中心点坐标 Kax85)9u  
Dim tt As String {Qlvj.Xw  
Dim rt(3) As Single HO&#Lv  
    '判断是否平行 vseuk@>  
   acx = p3x - p1x A%%WPBk{O  
   acy = p3y - p1y  7&l  
   bdx = p4x - p2x _oe2pL&  
   bdy = p4y - p2y !oM1  
   If acx * bdy = acy * bdx Then *gVRMSrx4  
      rt(0) = 0 3 T&m  
      Exit Function DQKhR sC  
   Else )CihqsA2  
      '判断斜率存在否 a"#5JcR3  
      If p1x = p3x And p2x <> p4x Then tw\/1wa.  
         tt = "ac_n_bd_y" "d%":F(  
      ElseIf p1x <> p3x And p2x = p4x Then o`hF1*yp  
         tt = "ac_y_bd_n" %UgyGQeo  
      ElseIf p1x <> p3x And p2x <> p4x Then 611:eLyy&l  
         tt = "ac_y_bd_y" `4(k ?Pk2  
      End If $p}7CP  
    Select Case tt S(9fGh  
         Case "ac_n_bd_y" /v=MGX@r  
            'bd线段方程 V4ayewVX  
            k_bd = bdy / bdx } Tp!Ub\Cc  
            b_bd = p2y - k_bd * p2x Jr\4x7a;`~  
            p_x = p1x $I>.w4G}  
            p_y = k_bd * p_x + b_bd *jf (TIU  
         Case "ac_y_bd_n" FW=oP>f]w  
            'ac线段方程 Jr 9\j3J{  
            k_ac = acy / acx cKF 8(  
            b_ac = p1y - k_ac * p1x sq&$  
            p_x = p2x 5BTQJa  
            p_y = k_ac * p_x + b_ac xNE<$Bz  
        Case "ac_y_bd_y" ]?b#~  
           'ac，bd线段都要求 60^dzi!vs  
           k_ac = acy / acx M(I 2M  
           b_ac = p1y - k_ac * p1x m_' 1yX@  
           k_bd = bdy / bdx U6n%rdXJ=  
           b_bd = p2y - k_bd * p2x PHZA?>Q7Z  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) O6lj^  
           p_y = k_ac * p_x + b_ac %k5^n0|*  
        End Select 3QU<vdtr  
      rt(1) = p_x 5A:b \  
      rt(2) = p_y 8]'qJ;E2  
     A;q}SO%b  
'计算最大半径 f{k2sU*uBE  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Ba6''?;G  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 1i#M(u_  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) j`='SzVloW  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 4~DFtWbf  
Dim bb(5) As Single ;la(Q~#  
  bb(1) = rr1 O .m;a_  
  bb(2) = rr2 |4ONGU*`E  
  bb(3) = rr3 bC)diC  
  bb(4) = rr4 C!%BW%"R  
  nb = rr1 DY0G;L3  
For i = 1 To 4 7p@qzE  
    If nb <= bb(i) Then j01#Wq_\fk  
       nb = bb(i) r;I3N+  
    End If $iupzVrro  
Next i Abd&p N  
    rt(0) = Sqr(nb) `=vL?w^QS  
    rr = rt() SA)}---"  
  End If _{C:aIl[2  
         >Vn;1|w  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  jjN]*{s  

$,ZBK6CT  
有热压工艺方面的人才或者资料分享下； wR@&C\}9  
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 w] i&N1i  

高手真多！

楼主威武霸气.